1. TCVNtiu chun quc giatcvn 6475-1:2007 TCVN 6475-13:2007 Xut
bn ln 2Quy phm phn cp v gim st k thut h thng ng ng bin Rules for
Classification and Technical Supervision of Subsea Pipeline Systemh
ni - 20071
2. TCVN 6475-1:2007 TCVN 6475-13:20072
3. TCVN 6475-1:2007 TCVN 6475-13:2007Li ni u B tiu chun Quc gia
t TCVN 6475-1: 2007 n TCVN 6475-13:2007 thay th cho TCVN 6475:
1999. B tiu chun Quc gia t TCVN 6475-1: 2007 n TCVN 6475 13: 2007
Quy phm phn cp v gim st k thut h thng ng ng bin do Cc ng kim Vit
Nam v Ban K thut tiu chun TCVN/TC8 - ng tu v Cng trnh bin - phi hp
bin son, Tng cc Tiu chun o lng Cht lng ngh, B Khoa hc v Cng ngh cng
b.3
4. TCVN 6475-1:2007 TCVN 6475-13:2007Li gii thiu H thng quy phm
phn cp v gim st k thut h thng ng ng bin c bin son trn c s TCVN
6475: 1999 v cc ti liu chnh sau: DNV-OSS-F301: Certification and
Verification of Pipelines (Chng nhn v kim tra h thng ng ng bin - ng
kim Nauy);Offshore Standard - DNV-OS-F101 - Submarine Pipeline
Systems (H thng ng ng bin ng kim Nauy);DNV RP E305 On-bottom
Stability Design of Submarine Pipelines (Thit k n nh y bin ca h
thng ng ng bin - ng kim Nauy);DNV RP B401: Cathodic Protection
Design (Thit k bo v ca tt);DNV Guideline 13: Interference Between
Trawl Gear and Pipelines (Hng dn 13: Tng tc gia li nh c v ng ng -
ng kim Nauy);DNV Guideline 14: Free Spanning Pipelines (Hng dn 14:
Nhp hng ca ng ng - ng kim Nauy);ABS Guide for Building and
Classing: Subsea Pipeline Systems and Riser (Hng dn phn cp v ch to:
H thng ng ng bin v ng ng - ng kim Hoa K);H thng quy phm ny bao gm
13 tiu chun Quc gia t TCVN 6475-1: 2007 n TCVN 647513:2007: 1. TCVN
6475-1: 2007 - Quy phm phn cp v gim st k thut h thng ng ng bin Phn
1: Quy nh chung. 2. TCVN 6475-2: 2007 - Quy phm phn cp v gim st k
thut h thng ng ng bin Phn 2: Phn cp h thng ng ng bin 3. TCVN
6475-3: 2007 - Quy phm phn cp v gim st k thut h thng ng ng bin Phn
3. nh gi cp li giy chng nhn 4. TCVN 6475-4: 2007 - Quy phm phn cp v
gim st k thut h thng ng ng bin Phn 4. Nguyn tc thit k 5. TCVN
6475-5: 2007 - Quy phm phn cp v gim st k thut h thng ng ng bin Phn
5. C s thit k 6. TCVN 6475-6: 2007 - Quy phm phn cp v gim st k thut
h thng ng ng bin Phn 6. Ti trng 4
5. TCVN 6475-1:2007 TCVN 6475-13:2007 7. TCVN 6475-7: 2007 -
Quy phm phn cp v gim st k thut h thng ng ng bin Phn 7. Ch tiu thit
k 8. TCVN 6475-8: 2007 - Quy phm phn cp v gim st k thut h thng ng
ng bin Phn 8. ng ng 9. TCVN 6475-9: 2007 - Quy phm phn cp v gim st
k thut h thng ng ng bin Phn 9. Cc b phn ca ng ng v lp rp 10. TCVN
6475-10: 2007 - Quy phm phn cp v gim st k thut h thng ng ng bin Phn
10. Chng n mn v bc gia ti 11. TCVN 6475-11: 2007 - Quy phm phn cp v
gim st k thut h thng ng ng bin Phn 11. Lp t 12. TCVN 6475-12: 2007
- Quy phm phn cp v gim st k thut h thng ng ng bin Phn 12. Hn 13.
TCVN 6475-13: 2007 - Quy phm phn cp v gim st k thut h thng ng ng
bin Phn 13. Kim tra khng ph hy5
6. TCVN 6475-1:2007 TCVN 6475-13:2007 Mc lc Li ni u.... 3 Li
gii thiu..... 4 TCVN 6475-1: 2007 - Quy phm phn cp v gim st k thut
h thng ng ng bin Phn 1: Quy nh chung. 1. Phm vi p dng
..............................................................................................................
31 2. Ti liu vin
dn.........................................................................................................
32 3. i tng gim st ca ng kim
..................................................................................
32 4. Tin trnh thc hin phn
cp...........................................................................................
33 5. Nguyn tc gim st k
thut...........................................................................................
33 5.1. Quy nh chung v gim st k thut
...............................................................................
33 5.2. Gim st trc tip
.............................................................................................................
35 5.3. Gim st gin tip
............................................................................................................
35 5.4. Gim st k thut theo ri ro
.......................................................................................
36 5.5. La chn mc gim st k thut
......................................................................................
38 6. Thut ng, gii thch v k
hiu........................................................................................
40 6.1. Thut ng v gii thch
........................................................................................................
40 6.2. Cc k hiu v vit tt
.........................................................................................................
47 TCVN 6475-2: 2007 - Quy phm phn cp v gim st k thut h thng ng ng
bin Phn 2: Phn cp h thng ng ng bin 1. Phm vi p dng
.........................................................................................................................53
2. Ti liu vin
dn.....................................................................................................................53
3. iu kin phn cp ng ng
...............................................................................................54
4. Cp ca ng
ng......................................................................................................................54
4.1. K hiu cp
...............................................................................................................................54
4.2. Ghi ch cp
..................................................................................................................................54
6
7. TCVN 6475-1:2007 TCVN 6475-13:2007 5. Gim st k thut trong
giai on thit k s b
.........................................................................55
6. Phn cp
.....................................................................................................................................55
6.1. Quy nh chung
............................................................................................................................55
6.2. H s k thut
..............................................................................................................................56
6.2.1. Quy nh chung
.........................................................................................................................56
6.2.2. C s thit k v thit k chi
tit............................................................................................56
6.2.3. Ch to ng ng v b phn ng ng
...............................................................................60
6.2.4. H thng kim sot n mn v ch to lp bc gia ti
.............................................................61
6.2.5. Lp t v chy th
...................................................................................................................62
6.2.6. Vn hnh
...............................................................................................................................62
6.2.7. S khai
thc............................................................................................................................63
6.3. Phn cp trong qu trnh duyt thit k
.......................................................................................63
6.3.1. Duyt thit
k......................................................................................................................63
6.3.2. Duyt thit k mc
thp.......................................................................................................65
6.3.3. Duyt thit k mc va
.......................................................................................................65
6.3.4. Duyt thit k mc cao
.......................................................................................................65
6.3.5. Ni dung duyt thit
k..........................................................................................................65
6.4. Gim st k thut trong qu trnh ch to mi
..........................................................................74
6.4.1. Quy nh chung
.........................................................................................................................75
6.4.2. Gim st k thut, kim tra trong qu trnh ch to
.................................................................
76 6.4.3. Gim st k thut, kim tra trong ch to mc thp
............................................................. 80
6.4.4. Gim st k thut, kim tra trong ch to mc
va................................................................
80 6.4.5. Gim st k thut, kim tra trong ch to mc
cao................................................................
81 6.4.6. BIn bn kim tra cui cng
....................................................................................................
81 6.4.7. Ni dung gim st k thut, kim tra trong ch
to..................................................................
817
8. TCVN 6475-1:2007 TCVN 6475-13:2007 6.5. Kim tra phn cp i vi
cc ng ng hin
c.....................................................................
114 6.6. H s phn cp
........................................................................................................................
114 6.6.1. Quy nh
chung......................................................................................................................
114 6.6.2. H s phn cp trong cc giai on ca d
n......................................................................
115 6.6.3. Hiu lc ca h s phn
cp..................................................................................................
116 6.6.4. Giy chng nhn phn cp
...................................................................................................
116 6.6.5. Giy chng nhn giai on
....................................................................................................
117 6.6.6. Bo co kim tra
....................................................................................................................
117 6.6.7. Thng bo v hot ng gim st k thut, kim tra
............................................................. 118
6.6.8. Bo co tham d kim tra (Visit
reports).................................................................................
118 6.6.9. Cp giy chng nhn
.............................................................................................................
118 7. Cc yu cu v vn hnh, kim tra v sa
cha......................................................................
119 7.1. Quy nh chung
.........................................................................................................................
119 7.1.1. Cc quy
trnh...........................................................................................................................
119 7.1.2. H s ng ng ang vn
hnh............................................................................................
120 7.1.3. Vn
hnh.............................................................................................................................
120 7.1.4. Nguyn tc theo di v kim tra
............................................................................................
122 7.1.5. Thm nh khai
thc...............................................................................................................
122 7.1.6. Kim tra bt
thng................................................................................................................
122 7.2. Kho st cu hnh ng ng
....................................................................................................123
7.2.1. Quy nh chung
......................................................................................................................123
7.2.2. Chng trnh kim tra
.............................................................................................................123
7.3. Kim tra v theo di n mn bn ngoi
.....................................................................................125
7.3.1. Quy nh chung
.......................................................................................................................125
7.3.2. ng ng trong vng c mc nc bin i v vng kh
quyn...........................................1268
9. TCVN 6475-1:2007 TCVN 6475-13:2007 7.3.3. ng ng v ng ng
trong vng ngp nc
..................................................................126
7.4. Kim tra v theo di n mn bn trong
......................................................................................126
7.4.1. Quy nh chung
.......................................................................................................................127
7.4.2. Kim tra n mn
......................................................................................................................127
7.4.3. Theo di n
mn......................................................................................................................128
7.5. Khuyt tt v sa
cha...............................................................................................................128
7.5.1. Quy nh chung
.......................................................................................................................128
7.5.2. Mt n nh tng
th.............................................................................................................130
7.5.3. Cc rnh, l, nt v vt kha
...................................................................................................130
7.5.4. Cc khuyt tt do khuyt kim
loi.........................................................................................130
7.5.5. Vt lm
................................................................................................................................130
7.5.6. R r
.....................................................................................................................................130
7.5.7. Sa cha bng hn
.................................................................................................................131
8. Duy tr hiu lc ca giy chng nhn
........................................................................................131
8.1. Quy nh chung
..........................................................................................................................131
8.2. Duy tr hiu lc ca giy chng nhn
.........................................................................................132
8.3. Gim st k thut, kim tra trong qu trnh khai
thc..................................................................133
8.4. Ngha v ca ch ng ng
.....................................................................................................134
8.5. H s phn cp trong khai thc
.................................................................................................135
TCVN 6475-3: 2007 - Quy phm phn cp v gim st k thut h thng ng ng bin
Phn 3: nh gi cp li giy chng nhn 1. Quy nh chung
.........................................................................................................................137
1.1. Phm vi p dng
........................................................................................................................137
1.2. Ti liu vin
dn...................................................................................................................138
1.3. S p dng tiu chun khi nh gi cp li giy chng nhn
..............................................1389
10. TCVN 6475-1:2007 TCVN 6475-13:2007 1.4. Ko di thi gian s
dng ng
ng.........................................................................................139
1.4.1. Quy nh chung
...................................................................................................................139
1.4.2. Xem xt cc ti liu thit
k..................................................................................................140
1.4.3. Kim tra
...............................................................................................................................140
1.4.4. Phn tch
bn......................................................................................................................140
1.4.5. Tin hnh sa cha/ kim tra
li..........................................................................................141
2. Ch tiu thit k
..........................................................................................................................141
2.1. Quy nh chung
..........................................................................................................................141
2.2. Th p lc h thng
...................................................................................................................141
2.3. S thoi ho
...............................................................................................................................141
TCVN 6475-4: 2007 - Quy phm phn cp v gim st k thut h thng ng ng bin
Phn 4: Nguyn tc thit k 1. Phm vi p dng
...............................................................................................................................143
2. Ti liu vin
dn..........................................................................................................................143
3. Nguyn tc an ton
..........................................................................................................................143
3.1. Quy nh chung
.............................................................................................................................143
3.2. Mc tiu an
ton.............................................................................................................................144
3.3. Xem xt c h thng
......................................................................................................................145
3.4. Phng php xc nh cp an
ton................................................................................................145
3.5. m bo cht lng
......................................................................................................................145
4. La chn phng php thit
k.........................................................................................................146
4.1. Quy nh chung
.............................................................................................................................146
4.2. Phn loi sn phm cht lng dn trong ng
ng......................................................................146
4.3. Cp v tr
........................................................................................................................................147
4.4. Cc cp an ton
............................................................................................................................14710
11. TCVN 6475-1:2007 TCVN 6475-13:2007 4.5. Phng php h s an ton
ring phn
........................................................................................148
4.6. nh gi tin cy
........................................................................................................................149
TCVN 6475-5: 2007 - Quy phm phn cp v gim st k thut h thng ng ng bin
Phn 5: C s thit k 1. Phm vi p dng
...............................................................................................................................143
2. Ti liu vin
dn..........................................................................................................................143
3. Nguyn tc an ton
..........................................................................................................................143
3.1. Quy nh chung
.............................................................................................................................143
3.2. Mc tiu an
ton.............................................................................................................................144
3.3. Xem xt c h thng
......................................................................................................................145
3.4. Phng php xc nh cp an
ton................................................................................................145
3.5. m bo cht lng
......................................................................................................................145
4. La chn phng php thit
k.........................................................................................................146
4.1. Quy nh chung
.............................................................................................................................146
4.2. Phn loi sn phm cht lng dn trong ng
ng......................................................................146
4.3. Cp v tr
........................................................................................................................................147
4.4. Cc cp an ton
............................................................................................................................147
4.5. Phng php h s an ton ring phn
........................................................................................148
4.6. nh gi tin cy
.......................................................................................................................149
TCVN 6475-6: 2007 - Quy phm phn cp v gim st k thut h thng ng ng bin
Phn 6: Ti trng 1. Quy nh chung
................................................................................................................................163
2. Ti liu vin
dn..........................................................................................................................164
3. Ti trng chc nng
..........................................................................................................................164
3.1. Quy nh chung
.............................................................................................................................16411
12. TCVN 6475-1:2007 TCVN 6475-13:2007 3.2. Cc hiu ng ti trng c
trng
...................................................................................................165
4. Ti trng mi trng
.........................................................................................................................165
4.1. Quy nh chung
.............................................................................................................................165
4.2. Ti trng gi
..................................................................................................................................165
4.3. Ti trng thu ng
.......................................................................................................................166
4.4. Ti trng do sng v dng
chy.....................................................................................................166
4.5. Cc hiu ng ca ti trng c trng
.............................................................................................168
5. Ti trng xy
lp................................................................................................................................169
6. Ti trng s c
..................................................................................................................................170
7. Cc ti trng khc
.............................................................................................................................171
7.1. Ti trng do li nh
c................................................................................................................171
7.2. ng
t.........................................................................................................................................172
TCVN 6475-7: 2007 - Quy phm phn cp v gim st k thut h thng ng ng bin
Phn 7: Ch tiu thit k 1. Phm vi p dng
...............................................................................................................................173
2. Ti liu vin
dn..........................................................................................................................173
3. Cc nguyn tc thit k v vt liu
...................................................................................................174
3.1. B tr ng
ng.............................................................................................................................174
3.2. Th p lc ti nh my v th p lc h thng
..............................................................................176
3.3. Chiu dy thnh ng ti thiu
........................................................................................................177
3.4. La chn vt liu
...........................................................................................................................177
3.5. Cc tnh cht c trng ca vt liu
..............................................................................................179
3.6. D tr n mn
...............................................................................................................................181
4. Tnh ton ti trng v kh nng chu lc
..........................................................................................182
4.1. Cc iu kin ti trng
..................................................................................................................18212
13. TCVN 6475-1:2007 TCVN 6475-13:2007 4.2. Tnh ton hiu ng ti
trng
..........................................................................................................182
4.3. dy thnh ng c
trng...........................................................................................................184
4.4. Tnh ton ng sut v bin
dng....................................................................................................185
5. Cc trng thi gii hn
......................................................................................................................186
5.1. Quy nh chung
.............................................................................................................................187
5.2. nh dng trng thi gii hn
.........................................................................................................188
5.3. H s hiu ng ti trng v t hp ti trng
...................................................................................190
5.4. Kh nng chu p lc (n)
..............................................................................................................192
5.5. Mt n nh cc
b.........................................................................................................................192
5.6. Mt n nh tng th
......................................................................................................................198
5.7. Mi
.................................................................................................................................................199
5.8. van ca ng
...........................................................................................................................201
5.9. Bin dng do tch
ly....................................................................................................................202
5.10. Nt
gy..................................................................................................................................
..203 5.11. Trng thi gii hn s
c........................................................................................................
.204 6. Cc vn cn c bit quan tm
............................................................................................
..205 6.1. Tng tc gia t v ng
............................................................................................................
205 6.2. Nhp hng ca ng ng/ ng ng
........................................................................................
205 6.3. n nh y bin
..........................................................................................................................
216 6.4. Tng tc vi li nh
c............................................................................................................
221 6.5. Cc ti trng khc, vt
ri..........................................................................................................
225 6.6. Bc cch nhit
..............................................................................................................................
225 6.7. ng lng trong ng v b ng
..................................................................................................
.226 7. Cc b phn v ph tng ca ng
ng..................................................................................
...226 8. Kt cu
.......................................................................................................................................
22613
14. TCVN 6475-1:2007 TCVN 6475-13:2007 8.1. Kt cu ng ng
....................................................................................................................
226 8.2. Cc ng ch
J...............................................................................................................................
226 8.3. Tnh n nh ca si
.....................................................................................................................
227 9. Lp t v sa cha
........................................................................................................................
227 9.1. Quy nh chung
............................................................................................................................
227 9.2. thng ca ng
.........................................................................................................................
228 9.3. Lp
bc..........................................................................................................................................
229 TCVN 6475-8: 2007 - Quy phm phn cp v gim st k thut h thng ng ng
bin Phn 8: ng ng 1. Quy nh chung
................................................................................................................................231
1.1. Phm vi p dng
...........................................................................................................................231
1.2. Bn ghi cc c tnh k thut ca vt liu
.....................................................................................231
1.3. Chng nhn trc vt liu v nh ch
to.....................................................................................232
1.4. Qu trnh ch
to...........................................................................................................................232
2. Ti liu vin
dn.........................................................................................................................233
3. K hiu ca ng
..............................................................................................................................234
3.1. Cp NDT ca ng
........................................................................................................................234
3.2. Cc yu cu b sung
...................................................................................................................234
3.3. K hiu ng
..................................................................................................................................235
4. Th tnh cht c
hc.........................................................................................................................236
4.1. Quy nh chung
............................................................................................................................236
4.2. La chn v chun b mu th
.....................................................................................................236
4.3. Phn tch thnh phn ha hc
.....................................................................................................237
4.4. Th ko
........................................................................................................................................237
4.5. Th un
........................................................................................................................................23914
15. TCVN 6475-1:2007 TCVN 6475-13:2007 4.6. Th dai va p vi vt
ct ch V
...........................................................................................241
4.7. Th vt x do vt ri (Drop weight tear test)
..............................................................................242
4.8. Th dai gy
...........................................................................................................................242
4.9. Th bn ct
...........................................................................................................................244
4.10. Kim tra cu trc kim loi v th
cng.....................................................................................244
4.11. Th bin dng gi ho vt liu c
bn..........................................................................................247
5. Th n mn
......................................................................................................................................247
5.1. Quy nh chung
.............................................................................................................................247
5.2. Th n mn r
..............................................................................................................................
248 5.3. Th nt do p sut
hyro...............................................................................................................
249 6. Cc c tnh ca vt liu
.................................................................................................................
249 6.1. Quy nh chung
............................................................................................................................
249 6.2. ng thp cc bon mng gan (C-Mn)
.........................................................................................
250 6.3. Thp ferrit-austenit (Thp duplex)
................................................................................................
255 6.4. ng ng bng cc loi thp khng g khc v hp kim Ni chng n mn
................................ 257 6.5. ng ng thp c lp ph/lp
lt.................................................................................................
258 6.6. Tnh
hn.........................................................................................................................................
260 7. Cc yu cu b
sung.................................................................................................................
261 7.1. Cc yu cu b sung S, ng ng vn chuyn cht c cha kh chua
...................................... 261 7.2. Cc yu cu b sung F,
cc tnh cht hm
gy.............................................................................
264 7.3. Cc yu cu b sung P, ng ng chu bin dng do
.............................................................. 266
7.4. Cc yu cu b sung D, kch thc
..............................................................................................
267 7.5. Cc yu cu b sung U, h s s dng
cao..................................................................................
267 8. Qu trnh ch to
.............................................................................................................................
269 8.1. Quy nh chung
............................................................................................................................
26915
16. TCVN 6475-1:2007 TCVN 6475-13:2007 8.2. c tnh k thut ca quy
trnh ch to (MPS) v chng
nhn..................................................... 269 8.3.
Luyn
thp....................................................................................................................................
271 8.4. Quy trnh ch to tm (plate and strip)
.........................................................................................
271 8.5. Qu trnh ch to ng ng
........................................................................................................
272 8.6. Phn tch thnh phn ha
hc.......................................................................................................
275 8.7. Th tnh cht c hc v tnh chng n
mn...................................................................................
275 8.8. Kim tra khng ph
hy.................................................................................................................
280 8.9. Kim tra bng mt thng, trnh tay ngh th v sa cha cc khuyt tt.
............................. 282 8.10. Th p lc ti nh my
................................................................................................................284
8.11. Kch thc, khi lng v chiu di
.............................................................................................285
TCVN 6475-9: 2007 - Quy phm phn cp v gim st k thut h thng ng ng bin
Phn 9: Cc b phn ca ng ng v lp rp 1. Phm vi p dng
...............................................................................................................................291
2. Ti liu vin
dn..........................................................................................................................291
3. Cc yu cu i vi thit k cc b phn ng
ng........................................................................292
3.1. Quy nh chung
.............................................................................................................................292
3.2. La chn vt liu
...........................................................................................................................294
3.3. Cc u ni bng mt bch v cc u ni c kh.
........................................................................295
3.4. Bu lng
..........................................................................................................................................295
3.5.
Van................................................................................................................................................297
3.6. Bnh chu p
lc.............................................................................................................................298
3.7. Cc b phn c ch to bng phng php hn
.....................................................................298
3.8. Cc mi ni cch
in...................................................................................................................299
3.9. Cc hng mc kt cu
..................................................................................................................299
4. Vt liu v bn ghi c tnh k thut ca qu trnh ch to cc b phn ng ng.
......................30016
17. TCVN 6475-1:2007 TCVN 6475-13:2007 4.1. Cc c tnh c
hc.......................................................................................................................300
4.2. Ch to v th nghim
.................................................................................................................300
5. Vt liu dng cho cc b phn rn, c v to hnh nng
..............................................................301
5.1. Quy nh chung
............................................................................................................................301
5.2. Cc b phn bng thp C- Mn hp kim thp
...............................................................................302
5.3. Cc b phn bng thp fert Austernit (duplex), thp khng g khc v hp
kim niken chng n mn (CRA).
...........................................................................................................................................304
5.4. Nhit luyn.
....................................................................................................................................304
6. Qu trnh to hnh nng, rn, c v x l
nhit................................................................................304
6.1. To hnh nng
................................................................................................................................304
6.2.
Rn.................................................................................................................................................305
6.3. c
...............................................................................................................................................
305 6.4. X l
nhit......................................................................................................................................
305 7. Qu trnh ch to cc b phn, thit b v hng mc kt
cu.......................................................... 306
7.1. Quy nh chung
............................................................................................................................
306 7.2. Ch to cc mt
bch.....................................................................................................................
307 7.3. Ch to van
...............................................................................................................................
308 7.4. Ch to cc thit b v cc b phn chu p lc bng phng php hn.
................................. 308 7.5. Ch to cc thit b v b phn
khc.
.......................................................................................
308 7.6. Ch to cc chi tit kt cu
.......................................................................................................
309 7.7. Th tnh cht c hc cho cc b phn to hnh nng, c v rn.
............................................ 309 8. Ch to cc ng
cong
(Bend).......................................................................................................
310 8.1. Quy nh chung.
.......................................................................................................................
310 8.2. ng m dng cho cc ng dng c nc bin.
...........................................................................
312 8.3. Nhit luyn sau khi un.
...........................................................................................................
31217
18. TCVN 6475-1:2007 TCVN 6475-13:2007 8.4. Chng nhn quy trnh
un
........................................................................................................
313 8.5. Un v nhit luyn sau khi un
................................................................................................
317 8.6. Kim tra khng ph hu v kim tra bng th
gic.....................................................................
317 8.7. Kim tra trong ch to cc ng
cong.........................................................................................
318 8.8. Kch thc, dung sai
..................................................................................................................
320 9. Ch to cc ng ng, cc vng ng dn n, cc on ng cun (reeling) v ko
(towing)321 9.1. Quy nh chung
............................................................................................................................
321 9.2. Vt liu dng cho cc ng ng, cc vng ng dn n, cc on ng cun
(reeling) v ko
(towing).................................................................................................................................................
321 9.3. Quy trnh ch to
..........................................................................................................................
321 9.4. Nhn vt liu, nhn dng v truy tm vt
liu.................................................................................
322 9.5. Ct, to hnh, lp rp, hn v x l
nhit........................................................................................322
9.6. Th thy tnh
..................................................................................................................................323
9.7. Kim tra bng th gic v kim tra khng ph hy
.........................................................................324
9.8. Kim tra kch
thc.........................................................................................................................324
9.9. Bo v chng n mn
....................................................................................................................324
TCVN 6475-10: 2007 - Quy phm phn cp v gim st k thut h thng ng ng
bin Phn 10: Chng n mn v bc gia ti 1. Quy nh chung
...............................................................................................................................
325 1.1. Phm vi p
dng...........................................................................................................................
325 1.2. nh ngha
....................................................................................................................................
325 2. Ti liu vin dn
........................................................................................................................
326 3. Nguyn l chung kim sot n mn trong thit
k......................................................................
326 3.1. Quy nh chung
............................................................................................................................
326 3.2. nh gi cc bin php chng n mn
........................................................................................
32718
19. TCVN 6475-1:2007 TCVN 6475-13:2007 4. Bc ngoi
ng...................................................................................................................................
327 4.1. Quy nh chung
............................................................................................................................
327 4.2. Cc yu cu i vi cng tc ch to lp bc
..............................................................................
329 4.3. Cc yu cu i vi H thng bc polypropylene hoc Polyethylene 3
lp ................................. 334 5. Bc ng ng c
bit.....................................................................................................................
336 5.1. Quy nh chung
............................................................................................................................
336 5.2. Vt liu bc, chun b b mt v
bc............................................................................................
337 6. Bc mi ni hin
trng...................................................................................................................
337 6.1. Quy nh chung
............................................................................................................................
337 6.2. Vt liu bc, chun b b mt v
bc............................................................................................
338 7. Bc b tng gia
ti...........................................................................................................................
339 7.1. Quy nh chung
............................................................................................................................
339 7.2. Vt liu lm b tng v ch to lp
bc.........................................................................................
339 7.3. Kim tra v th
nghim..................................................................................................................
341 8. Thit k bo v catt
.......................................................................................................................
341 8.1. Quy nh chung
............................................................................................................................
341 8.2. Thng s thit k v tnh ton
......................................................................................................
342 9. Ch to v lp t ant t hu
.........................................................................................................343
9.1. Ch to
ant...................................................................................................................................343
9.2. Lp t ant
..................................................................................................................................343
10. Thit k, ch to lp bo v chng n mn bn trong
...................................................................344
10.1. Quy nh chung
...........................................................................................................................344
10.2. Bo v chng n mn bn trong bng cch x l dung cht
......................................................344 10.3. Bo
v chng n mn bn trong bng cch s dng ng bng hp kim chng n mn
(CRA)..345 10.4. Bo v chng n mn bn trong bng lp bc hoc lp lt hu c
............................................34519
20. TCVN 6475-1:2007 TCVN 6475-13:2007 10.5. Bo v chng n mn bn
trong bng cch x l ho hc
.........................................................345 A1.
Xem xt chung trong thit k
.........................................................................................................347
A1.1. Quy nh chung
...........................................................................................................................347
A1.2. in th bo v
...........................................................................................................................347
A1.3. Vt liu ch to ant hy sinh
.......................................................................................................347
A1.4. Hnh dng
ant.............................................................................................................................348
A1.5. S dng lp bc kt hp vi bo v catt
...................................................................................349
A2. Cc thng s thit k
.....................................................................................................................349
A2.1. Quy nh chung
...........................................................................................................................349
A2.2. Tui th thit
k............................................................................................................................349
A2.3. Mt dng in thit
k.............................................................................................................350
A2.4. H s suy gim lp bc v sn ph
............................................................................................351
A2.5. Lp bc ng ng
.....................................................................................................................353
A2.6. Cng thc in tr cho ant
........................................................................................................353
A2.7. in tr
sut.................................................................................................................................355
A2.8. H s s dng ant
.....................................................................................................................356
A3. Cc bc thit k
...........................................................................................................................357
A3.1. Phn loi vt c bo v
..........................................................................................................
357 A3.2. Tnh ton din tch b mt
..........................................................................................................
357 A3.3. Tnh ton dng in cn thit
.....................................................................................................
357 A3.4. La chn loi v kch thc ant
................................................................................................
358 A3.5. Tnh ton khi lng ant
...........................................................................................................
358 A3.6. Tnh ton s lng ant
..............................................................................................................
358 A3.7. Thit k ant chi tit
...................................................................................................................
359 A3.8. B tr ant
...................................................................................................................................
36020
21. TCVN 6475-1:2007 TCVN 6475-13:2007 TCVN 6475-11: 2007 - Quy
phm phn cp v gim st k thut h thng ng ng bin Phn 11: Lp t 1. Quy nh
chung
................................................................................................................................361
1.1. Phm vi p dng
...........................................................................................................................361
1.2. Phn tch hu qu ca cc loi h hng (FMEA) v nghin cu mc nguy him v
kh nng vn hnh
c(HAZOP)........................................................................................................................361
1.3. Cc bn v v chi tit k thut cho lp t v
th...........................................................................361
1.4. S tay lp t
.................................................................................................................................362
1.5.
Hn.................................................................................................................................................363
1.6. Kim tra bng mt v kim tra khng ph hu
(NDT)....................................................................364
1.7. Th ch to
....................................................................................................................................365
2. Ti liu vin
dn..........................................................................................................................366
3. Tuyn ng, kho st v chun b
......................................................................................................367
3.1. Kho st tuyn trc khi lp
t.....................................................................................................367
3.2. Chun b y bin
..........................................................................................................................367
3.3. Giao ct ng ng v cp
............................................................................................................368
3.4. Chun b tip cn vo b
...............................................................................................................368
4. Cc hot ng trn
bin....................................................................................................................369
4.1. Quy nh chung
.............................................................................................................................369
4.2. Tu ri ng
....................................................................................................................................369
4.3. Cc h thng neo, kiu neo v nh v neo
...................................................................................370
4.4. Cc h thng nh v
.....................................................................................................................370
4.5. H thng nh v ng
...................................................................................................................371
4.6. Cn trc v cc thit b
nng.........................................................................................................372
5. Lp t ng ng
...........................................................................................................................37221
22. TCVN 6475-1:2007 TCVN 6475-13:2007 5.1. Quy nh chung
.............................................................................................................................372
5.2. S tay lp
t.................................................................................................................................
372 5.3. Xt duyt, chng nhn s tay lp t, cc tham s quan trng v tnh
hiu lc ca chng ..... 374 5.4. Trng thi gii hn hot
ng........................................................................................................
376 5.5. Quy trnh lp t
...........................................................................................................................
376 5.6. Quy trnh khn cp
.......................................................................................................................
376 5.7. B tr tu ri ng, thit b ri ng v dng c
................................................................................
377 5.8. Cc yu cu lp
t.......................................................................................................................
380 6. Cc yu cu b sung i vi cc phng php lp t gy bin dng
do..................................... 381 6.1. Quy nh chung
............................................................................................................................
381 6.2. S tay lp
t.................................................................................................................................
382 6.3. Chng nhn s tay lp
t.............................................................................................................
382 6.4. Quy trnh lp t
...........................................................................................................................
383 6.5. Cc yu cu lp
t......................................................................................................................
383 7. Lp t ng ng bng phng php
ko.....................................................................................
384 7.1. Quy nh chung
............................................................................................................................
384 7.2. S tay lp
t................................................................................................................................
384 7.3. Chng nhn s tay lp
t............................................................................................................
385 7.4. Trng thi gii hn hot
ng.......................................................................................................
385 7.5. Quy trnh lp t
...........................................................................................................................
385 7.6. Cc quy trnh khn
cp.................................................................................................................
385 7.7. B tr, thit b v dng c
..............................................................................................................
386 7.8. Ko v lp t on
ng...............................................................................................................
386 8. Cc phng php lp t
khc........................................................................................................
386 8.1. Quy nh chung
............................................................................................................................
38622
23. TCVN 6475-1:2007 TCVN 6475-13:2007 9. Ko b (Shore
pull)..........................................................................................................................
387 9.1. Quy nh chung
.............................................................................................................................387
9.2. S tay lp t
................................................................................................................................387
9.3. Chng nhn s tay lp t
............................................................................................................387
9.4. Trng thi gii hn hot ng
.......................................................................................................387
9.5. Quy trnh lp
t.............................................................................................................................387
9.6. Quy trnh khn cp
........................................................................................................................388
9.7. B tr, thit b v dng
c................................................................................................................388
9.8. Cc yu cu lp t
.......................................................................................................................389
10. Cc hot ng ni ghp
(tie-in).......................................................................................................389
10.1. Quy nh chung
...........................................................................................................................389
10.2. S tay lp
t...............................................................................................................................389
10.3. Chng nhn s tay lp
t...........................................................................................................389
10.4. Trng thi gii hn hot
ng......................................................................................................390
10.5. Quy trnh ni ghp
......................................................................................................................390
10.6. Quy trnh khn cp
.....................................................................................................................390
10.7. Hot ng ni ghp trn mt nc
.............................................................................................390
10.8. Hot ng ni ghp di mt
nc..............................................................................................391
11. Kho st khi ri ng
.......................................................................................................................391
11.1. Quy nh chung
...........................................................................................................................391
11.2. Bn ghi cc chi tit k thut cho vic kho st khi ri ng
...........................................................391
11.3. Kho st khi ri
ng......................................................................................................................392
11.4. Kho st h thng bo v n mn khi ri ng
.............................................................................392
12. Sa cha nhp hng v bo v ng
ng......................................................................................392
12.1. Quy nh chung
...........................................................................................................................39223
24. TCVN 6475-1:2007 TCVN 6475-13:2007 12.2. Sa cha nhp
hng.....................................................................................................................393
12.3. o ho
......................................................................................................................................
393 12.4. si sau khi lp
t..................................................................................................................
394 12.5. Cc bao ct (va) v tm m b
tng.......................................................................................
395 13. Lp t cc kt cu neo v bo
v................................................................................................
396 13.1. Quy nh
chung...........................................................................................................................
396 14. Lp t cc ng ng
....................................................................................................................
396 14.1. Quy nh
chung...........................................................................................................................
396 14.2. S tay lp t
.............................................................................................................................
396 14.3. Chng nhn s tay lp t
.........................................................................................................
397 14.4. Cc trng thi gii hn hot ng
..............................................................................................
397 14.5. Cc quy trnh khn cp
..............................................................................................................
397 14.6. Cc yu cu lp t
...................................................................................................................
397 15. Kho st hon
cng.......................................................................................................................
398 15.1. Quy nh
chung...........................................................................................................................
398 15.2. Bn ghi cc chi tit k thut kho st hon
cng.........................................................................
398 15.3. Cc yu cu i vi kho st hon cng
...................................................................................
399 15.4. Kim tra h thng bo v n mn catt dng cm ng
............................................................. 399
16. Th nghim cui cng v chun b cho khai
thc..........................................................................
399 16.1. Quy nh
chung...........................................................................................................................
399 16.2. Bn ghi cc chi tit k thut th nghim cui cng v chun b cho
khai thc............................ 400 16.3. Cc quy trnh dng cho
th nghim cui cng v chun b cho khai thc
................................. 400 16.4. Lm sch v o
c....................................................................................................................
400 16.5. Th p lc h thng
...................................................................................................................
401 16.6. Lm sch, tho nc v sy kh
................................................................................................
40424
25. TCVN 6475-1:2007 TCVN 6475-13:2007 16.7. Th h
thng...............................................................................................................................
405 TCVN 6475-12: 2007 - Quy phm phn cp v gim st k thut h thng ng
ng bin Phn 12: Hn 1. Phm vi p dng
...............................................................................................................................407
1.1. Quy nh chung
.............................................................................................................................407
1.2. Cc qu trnh
hn...........................................................................................................................407
2. Ti liu vin
dn..........................................................................................................................408
3. Thit b hn, cc cng c v nhn
s................................................................................................409
3.1. Thit b hn v cng c
.................................................................................................................409
3.2. Nhn
s..........................................................................................................................................409
4. Vt liu hn
.......................................................................................................................................410
4.1. Quy nh chung
.............................................................................................................................410
4.2. Thnh phn ho hc
......................................................................................................................411
4.3. Cc tnh cht c
hc.......................................................................................................................411
4.4. Th l - Cc mi hn
trn...............................................................................................................412
4.5. X l v bo qun vt liu hn.
.....................................................................................................412
5. Quy trnh
hn.....................................................................................................................................413
5.1. Quy nh chung
.............................................................................................................................413
5.2. Bn ghi c tnh k thut quy trnh hn s b
(pWPS)...................................................................414
5.3. Bo co chng nhn quy trnh hn
(WPQR)..................................................................................414
5.4. Bn ghi c tnh k thut quy trnh hn (WPS)
..............................................................................415
5.5. WPS i vi hn sa cha
............................................................................................................415
5.6. Cc bin thin thng s quan trng trong cc quy trnh
hn.....................................................415 6. Chng
nhn quy trnh
hn.................................................................................................................418
6.1. Quy nh chung
.............................................................................................................................41825
26. TCVN 6475-1:2007 TCVN 6475-13:2007 6.2. Chng nhn quy trnh
hn sa cha
..............................................................................................419
6.3. Chng nhn cc mi hn dc v mi hn xon c trn ng ng v b phn ng ng.
.....420 6.4. Chng nhn cc mi hn trn trn ng ng, cc vng gin n v cc on
ng ko............ 422 6.5. Chng nhn cc mi hn trn trong lp t v ni
ghp (tie in) ................................................ 423
6.6. Chng nhn cc mi hn trn phi chu sc cng do tch lu.
................................................... 424 6.7. Chng
nhn hn di nc cho cc mi ni ghp (tie in)
......................................................... 426 7. Th
v kim
tra.................................................................................................................................
426 7.1. Quy nh chung
............................................................................................................................
426 7.2. Kim tra bng mt thng v kim tra khng ph hu
.................................................................
426 7.3. Th ph hu mi hn gip mp
....................................................................................................
426 7.4. Th ng sut sunphua gy nt
.....................................................................................................
430 7.5. Th tnh n mn v kim tra cu trc vi
m...................................................................................
430 8. Ch to v cc yu cu v hn
.......................................................................................................
431 8.1. Quy nh chung
............................................................................................................................
431 8.2. Hn ch to
..................................................................................................................................
431 8.3. Hn sa cha
...............................................................................................................................
432 8.4. X l nhit sau khi hn
.................................................................................................................
433 8.5. Hn ng ng v cc b phn ng
ng..................................................................................
433 8.6. Ch to ng ng, vng dn n v on ng
ko...................................................................
433 8.7. Hn lp t v ni
ghp................................................................................................................
433 9. Cc yu cu c bit i vi vt liu v cc qu trnh
hn..............................................................
434 9.1. Thp cc bon c lp ph /lp lt bn trong ng
...........................................................................
434 9.2. Thp khng g duplex
...................................................................................................................
435 9.3. Thp khng g martensit (13 %
Cr)...............................................................................................
435 TCVN 6475-13: 2007 - Quy phm phn cp v gim st k thut h thng ng
ng bin26
27. TCVN 6475-1:2007 TCVN 6475-13:2007 Phn 13: Kim tra khng ph
hy 1. Quy nh chung
................................................................................................................................437
1.1. Phm vi p dng
...........................................................................................................................437
1.2. Cc phng php kim tra khng ph hy
...................................................................................437
1.3. Cc quy trnh kim tra khng ph
hy............................................................................................438
1.4. Chng nhn nhn s kim tra
.......................................................................................................439
1.5. Bo co
.........................................................................................................................................440
1.6. Thi gian thc hin NDT
................................................................................................................440
2. Ti liu vin
dn..........................................................................................................................440
3. Kim tra khng ph hy th cng v kim tra bng mt thng cc mi
hn..................................443 3.1. Quy nh chung
.............................................................................................................................443
3.2. Kim tra bng k thut chp nh phng
x....................................................................................443
3.3. Kim tra siu m
............................................................................................................................445
3.4. Kim tra bng cc ht t
................................................................................................................448
3.5. Kim tra cht lng thm thu
.........................................................................................................449
3.6. Kim tra bng dng xoy
...............................................................................................................450
3.7. Kim tra bng mt
thng..............................................................................................................452
4. Kim tra khng ph hy cc vt liu c bn v mi hn
ph............................................................452
4.1. Quy nh chung
.............................................................................................................................452
4.2. Kim tra cc tm v ng
................................................................................................................452
4.3. Vt liu rn
....................................................................................................................................453
4.4. Cc vt liu
c.............................................................................................................................454
4.5. Cc mi hn ph
...........................................................................................................................455
5. Kim tra khng ph hy t ng
......................................................................................................455
5.1. Quy nh chung
.............................................................................................................................45527
28. TCVN 6475-1:2007 TCVN 6475-13:2007 5.2. Kim tra siu m t
ng..............................................................................................................
455 6. Ch tiu chp nhn ca kim tra khng ph hy
.............................................................................
458 6.1. Quy nh chung
............................................................................................................................
458 6.2. Ch tiu chp nhn da trn nh gi ti hn k thut
(ECA)....................................................... 459 7.
Kim tra khng ph hy cc tm v di ti nh my ch to
.......................................................... 459 7.1.
Quy nh chung
............................................................................................................................
459 7.2. Kim tra siu m cc tm v di bng thp C-Mn v thp duplex
............................................... 459 7.3. Kim tra
siu m tm v di c lp ph
.......................................................................................
461 8. Kim tra khng ph hy ng ti nh my ch to ng
....................................................................
461 8.1. Quy nh chung
............................................................................................................................
462 8.2. Cc u ng cha c kim
tra..................................................................................................
462 8.3. Kim tra khng ph hy cn thc hin cho tt c cc ng
.......................................................... 462 8.4.
Kim tra khng ph hy i vi ng c
lin................................................................................
463 8.5. Kim tra khng ph hy cc ng hn h quang di lp tr dung
(SAW).................................... 469 8.6. Kim tra khng ph
hy th
cng.................................................................................................
473 8.7. Kim tra khng ph hy cc mi hn sa cha trn ng ng.
................................................. 476 8.8. Kim tra
bng mt thng cc mi hn trn ng
ng...............................................................
476 9. Kim tra cc mi hn trn trong lp t, cc mi hn ca b phn ng ng v
cc b phn chu p lc
khc....................................................................................................................................
477 9.1. Quy nh chung
............................................................................................................................
477 9.2. Kim tra khng ph hy v kim tra bng mt thng
.................................................................
477 9.3. Ch tiu chp
nhn.........................................................................................................................
478 9.4. Sa cha mi
hn..........................................................................................................................
484 10. Ch tiu chp nhn i vi cc b phn ng ng, thit b, cc hng mc kt
cu, vt liu c bn v cc mi hn ph
......................................................................................................................
48428
29. TCVN 6475-1:2007 TCVN 6475-13:2007 10.1. Quy nh
chung...........................................................................................................................
484 10.2. Ch tiu chp nhn ca kim tra khng ph hy th cng i vi tm v
di...............................485 10.3. Ch tiu chp nhn i vi cc
vt
rn..........................................................................................485
10.4. Ch tiu chp nhn i vi vt
c................................................................................................486
10.5. Ch tiu chp nhn i vi cc mi hn
ph.................................................................................487
11. Kim tra siu m t ng cc mi hn
trn.....................................................................................487
11.1. Quy nh chung
...........................................................................................................................487
11.2. Cc yu cu c
bn.....................................................................................................................487
11.3. Quy trnh
......................................................................................................................................494
11.4. Hiu chun
..................................................................................................................................496
11.5. Kim tra ti hin trng
...............................................................................................................497
11.6. Kim tra
li...................................................................................................................................499
11.7. nh gi v bo
co....................................................................................................................500
11.8. Chng nhn
................................................................................................................................501
11.9. Hiu lc ca chng nhn
.............................................................................................................505
Ph lc A. Yu cu i vi u d...507 Ph lc B. Xc nh tc sng ngang trong ng
thp....50929
30. TCVN 6475-1:2007 TCVN 6475-13:200730
31. TCVN 6475-1:2007t i u c h u n quc giaTcvn 6475-1: 2007 Xut
bn ln 2Quy phm phn cp v gim st k thut h thng ng ng bin Phn 1: Quy
nh chung Rules for Classification and Technical Supervision of
Subsea Pipeline Systems Part 1: General Requirement1. Phm vi p dng
1.1. Tiu chun ny quy nh cc yu cu v phn cp v gim st k thut trong qu
trnh thit k, ch to v khai thc cc h thng ng ng bin, k c cc h thng ng
ng t cc ca sng v vng bin Vit Nam dng vn chuyn ring l hoc hn hp cc
cht hydr ccbon trng thi lng hoc kh, nh du th, cc sn phm ca du, cc
loi kh. 1.2. H thng ng ng bin (sau y gi tt l ng ng) bao gm ton b cc
ng ng, ng ng, cc van, cc thit b ph tr, cc thit b an ton, h thng
chng n mn v cc h thng lin quan khc. 1.3. Tiu chun ny l c s k thut c
p dng cho cc giai on v hot ng: thit k, ch to, lp t, vn hnh, bo dng,
gim st k thut v phn cp ng ng. 1.4. Cc hot ng gim st k thut v phn cp
cc ng ng do c quan ng kim Vit Nam (sau y vit tt l ng kim) thc hin.
Ngoi ng kim Vit Nam, ch u t c php s dng thm ng kim nc ngoi ty thuc
vo quy m v c im ca cng trnh (nu cn). Hot ng gim st k thut c tin hnh
trn c s cc quy nh ca tiu chun ny v cc tiu chun khc c lin quan.
31
32. TCVN 6475-1:2007 1.5. Cho php p dng cc yu cu trong cc quy
phm, tiu chun k thut tng ng khc nu c ng kim chp nhn. 1.6. Tiu chun
ny khng p dng cho cc ng mm, ng ng ng, cc ng cp iu khin ngm di bin v
cc ng ng khng phi bng thp. 1.7. Tiu chun ny p dng cho cc phng php
ri ng hnh ch S (S-lay), hnh ch J (J-lay), ko ng (towing), v cc phng
php ri ng gy ra bin dng do. Ngoi ra tiu chun ny cn a ra cc yu cu v
lp t ng ng cng nh cc yu cu v kt cu bo v v gn gi cc ng ng. 2. Ti liu
vin dn Trong tiu chun ny, cc tiu chun sau y c vin dn: TCVN 6475-6:
2007 - Quy phm phn cp v gim st k thut h thng ng ng bin Phn 6: TI
trngTCVN 6475-7: 2007 - Quy phm phn cp v gim st k thut h thng ng ng
bin Phn 7: Ch tiu thit k;3. i tng gim st ca ng kim 3.1. Tiu chun ny
p dng cho cc i tng sau y: Cc ng ng thp hn;Cc ng ng thp hn;Cc bung
phng v nhn thoi (pig trap);Cc van, cc thit b iu khin v ph tng;Cc
thit b an ton;Cc lp ph bo v;H thng bo v catt.3.2. Trong tiu chun
ny, khi cp ti ng ng c ngha l cp ti mt hoc ton b cc i tng nu trong
3.1. Tiu chun ny khng ch gii hn p dng cho nhng i tng k trn m c th b
sung nhng i tng khc mt cch thch hp theo yu cu ca cc c quan c thm
quyn hoc ch ng ng.32
33. TCVN 6475-1:2007 3.3. Cc ng ng c thit k hoc ch to theo cc
tiu chun hoc Quy nh khc vi cc yu cu ca tiu chun ny phi c xem xt phn
cp ty thuc vo s tng ng gia cc tiu chun thit k v ch to. Trong nhng
trng hp , cn thng bo cho ng kim bit ngay giai on ban u c c s phn
cp. 4. Tin trnh thc hin phn cp 4.1. Vic phn cp v gim st k thut mt h
thng ng ng bin c tin hnh theo cc giai on ca d n v theo tin ra. Cng
tc gim st k thut do ng kim Vit Nam thc hin l mt phn ca qu trnh phn
cp. Cng tc gim st k thut c tin hnh trong tt c cc giai on ca d n v
phi bao hm tt c cc kha cnh trong d n . 4.2. Cc bc tin hnh cng tc
phn cp bao gm: 4.2.1. Tin phn cp (nu c): Xem xt thit k s b
(conceptual design).4.2.2. Phn cp: Xt duyt thit k bao gm c thit k
chi tit (detail design);Gim st k thut trong qu trnh thi cng: o oSn
xut v gia cng cc b phn ca ng ng;oCh to h thng bo v chng n mn v lp
bc gia ti;oLp t ng ng;o Sn xut ng;Hon thin ng ng.Cp giy chng
nhn.4.2.3. Duy tr hiu lc ca Giy chng nhn: Kim tra trong khai thc,
bo dng v sa cha.5. Nguyn tc gim st k thut 5.1. Quy nh chung v gim
st k thut33
34. TCVN 6475-1:2007 5.1.1. Cng tc gim st k thut l mt hot ng
kim tra c lp v mang tnh h thng i vi cc giai on khc nhau trong qu
trnh thit k, ch to v hot ng ca mt h thng ng ng bin nhm xc nh h thng
ng ng c p ng c cc yu cu v mc ch ra khng. 5.1.2. Cng tc gim st k
thut c ng kim tin hnh nhm xc nh cc li hoc h hng lin quan n ng ng,
nhm lm gim ri ro trong vn hnh h thng ng ng, sc khe v an ton cho con
ngi c lin quan cng nh vng ph cn vi h thng ng ng. 5.1.3. Cng tc gim
st k thut ch yu nhm vo tnh ton vn ca h thng ng ng, an ton cho con
ngi v bo v mi trng. 5.1.4. Phng php gim st chnh ca ng kim: ng kim
thc hin vic gim st theo nhng trnh t c quy nh trong tiu chun ny, ng
thi ng kim cng c th tin hnh kim tra bt thng bt c hng mc no ph hp vi
tiu chun ny trong trng hp ng kim thy cn thit. 5.1.5. thc hin cng tc
gim st, ch cng trnh, nh thu phi to mi iu kin thun li cho ng kim vin
tin hnh kim tra, th nghim vt liu v cc sn phm chu s gim st ca ng kim
k c vic ng kim vin c t do n tt c nhng ni sn xut v th nghim vt liu v
cc sn phm . 5.1.6. Cc c quan thit k, ch cng trnh, nh thu v nh my ch
to cc sn phm cng nghip phi thc hin cc yu cu ca ng kim trn c s cc
quy nh hin hnh c lin quan khi thc hin cng tc gim st k thut. 5.1.7.
Nu d nh c nhng sa i trong qu trnh ch to lin quan n vt liu, kt cu,
my mc, trang thit b v sn phm cng nghip khc vi cc bn v v ti liu c
duyt th cc bn v hoc ti liu sa i phi c trnh cho ng kim xem xt v duyt
thit k sa i trc khi thi cng. 5.1.8. Nu c nhng tranh chp xy ra trong
qu trnh gim st gia ng kim vin v cc c quan x nghip (ch cng trnh, nh
thu, nh ch to vt liu v sn phm) th cc c quan x nghip ny c quyn xut
kin ca mnh trc tip vi tng cp t thp ln cao ca ng kim gii quyt.
5.1.9. ng kim c th t chi khng thc hin cng tc gim st, nu nh thu hoc
xng ch to vi phm c h thng cc yu cu ca tiu chun ny hoc vi phm hp ng
v gim st vi ng kim. 5.1.10. Trong trng hp pht hin thy vt liu hoc sn
phm c khuyt tt, tuy c cp Giy chng nhn hp l, ng kim vn c quyn yu cu
tin hnh th nghim li hoc khc phc nhng khuyt tt , ng kim c th thu hi
v hy b Giy chng nhn cp. 34
35. TCVN 6475-1:2007 5.1.11. Trong qu trnh thc hin gim st, ng
kim c th tin hnh kim tra s ph hp ca kt cu, cng ngh theo cc tiu chun
v quy trnh khng c quy nh trong tiu chun ny nhng nhm mc ch thc hin
cc yu cu ca tiu chun ny. 5.1.12. ng kim c ng kim vin trc tip thc
hin vic kim tra ch to vt liu v sn phm hoc c th y quyn vic kim tra
ny cho cc t chc phn cp khc ph hp vi cc tha thun thay th ln nhau
trong gim st. 5.2. Gim st trc tip 5.2.1. Gim st trc tip l hnh thc
gim st do ng kim vin trc tip tin hnh, da trn cc h s k thut c ng kim
duyt cng nh nhng tiu chun v yu cu b sung c ng kim chp nhn. Da vo
tiu chun ny v ty thuc vo iu kin c th, ng kim s quy nh khi lng kim
tra, o c v th nghim trong qu trnh gim st. 5.2.2. Sau khi thc hin
gim st v nhn c nhng kt qu tha ng v th nghim vt liu v sn phm, ng kim
s cp hoc xc nhn Giy chng nhn. 5.3. Gim st gin tip 5.3.1. Gim st gin
tip l gim st do nhng ngi ca cc T chc kim tra k thut hoc cn b k thut
ca nh my c ng kim y quyn thc hin da theo h s k thut c ng kim duyt.
5.3.2. Gim st gin tip c thc hin theo nhng hnh thc sau: Cn b c ng
kim u quyn;X nghip c ng kim u quyn;H s c ng kim cng nhn.5.3.3. Da
vo cc yu cu ca tiu chun ny v ty thuc vo iu kin c th, ng kim s quy
nh cc iu kin tin hnh gim st gin tip, khi l