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GOST 14771-76
I N T E R S T A T E S T A N D A R D
GAS-SHIELDED ARC WELDING
WELDED JOINTS
MAIN TYPES, DESIGN ELEMENTS AND DIMENSION
Official Edition English Version Approved by Interstandard
STANDARDS PUBLISHING HOUSE Moscow
ГОСТ 14771-76
1
UDC 621.791.052:006.354 Group B05 I N T E R S T A T E S T A N D A R D
Gas-shielded Arc Welding
WELDED JOINTS
Main Types, Design Elements and Dimensions
GOST 14771-76*
In place of
GOST 14771-69
Date of introduction established by Decree No. 1826, dated 28.07.76, of State Committee for Standards of USSR Council of Ministers
from 01.07.77
Restriction of validity period is removed by Gosstandart Decree No. 553, dated 18.06.92
1. This Standard establishes the main types, design elements and dimensions of welded joints made from steels, and also alloys on iron to nickel and nickel bases, manufactured by gas to shielded arc welding.
This Standard does not establish the main types, design elements and dimensions of welded joints for steel pipelines in accordance with GOST 16037-80.
2. The following designations of welding methods are accepted in this Standard: ИН - in inert gases, with aid of non to consumable electrode without filler metal; ИНп - in inert gases, with aid of non to consumable electrode with filler metal; ИП - in inert gases and their mixtures with carbonic gas and oxygen, with aid of consumable electrode; УП - in carbonic gas and its mixture with oxygen, with aid of consumable electrode. 3. The main types of welded joints shall correspond to those specified in tab. 1.
Official Edition Reprinting is prohibited
*Edition (September 2001) with Amendments Nos. 1, 2 and 3, approved in March 1982, December 1986 and
January 1989 (IUS {Standards Information Catalog} 6-82, 3-87 and 4-89)
© Standards Publishing House, 1976 © Standards Publishing House, 2001
ГОСТ 14771-76
2
Table 1
Cross-section shape Thickness of welded parts, in mm, for ways of welding Type of joint
Shape of prepared edges
Character of executed weld of prepared edges of executed weld ИН ИНп ИП УП
Conventional designation of welded joint
0.5 to 2.0 — 0.5 to 4.0 0.5 to 4.0 С1
With flanging of two edges
— 0.8 to 4.0 1.0 to 12.0 1.0 to 12.0 С28
With flanging of one edge 0.5 to 2.0 — 0.5 to 4.0 0.5 to 40 С3
Unilateral
0.8 to 6.0 С2
Unilateral on demountable pad
0.5 to 4.0 0.8 to 6.0 0.8 to 6.0
0.8 to 8.0 C4
Unilateral on remaining pad С5
Unilateral lock
0.5 to 4.0 0.8 to 6.0 0.8 to 6.0 0.8 to 8.0
С6
But
t joi
nt
Without beveling of edges
Bilateral
3.0 to 6.0 3.0 to 6.0 3.0 to 6.0 3.0 to 12.0 С7
ГОСТ 14771-76
3
Continuation of tab. 1
Cross-section shape Thickness of welded parts, in mm, for ways of welding Type of
joint Shape of prepared
edges Shape of prepared
edges of prepared edges of executed weld ИН ИНп ИП УП
Conventional designation of welded joint
Unilateral С8
Unilateral on demountable pad С9
Unilateral on a remaining pad
— 3.0 to 10.0 3.0 to 10.0 3.0 to 60.0
С10
Unilateral lock — 3 to 40 C11
With one edge beveling
—
3 to 10 3 to 10
3 to 60 C12
With curvilinear beveling of one edge — — С13
With broken beveling of one edge — —
18 to 100 18 to 100
С14
But
t joi
nt
With two symmetric bevelings of one edge
Bilateral
— 6 to 20 8 to 100 8 to 100 С15
ГОСТ 14771-76
4
Continuation of tab. 1
Cross-section shape Thickness of welded parts, in mm, for ways of welding Type of
joint Shape of prepared
edges Shape of prepared
edges of prepared edges of executed weld ИН ИНп ИП УП
Conventional designation of welded joint
With two symmetric curvilinear bevelings of one edge
Bilateral — — 30 to 120 30 to 120 С16
Unilateral С17
Unilateral on demountable pad
—
С18
Unilateral on remaining pad — С19
Unilateral lock — С20
With beveling of two edges
Bilateral —
3 to 10 3 to 10 3 to 60
С21
With step beveling of two edges Unilateral — 4 to 20 4 to 20 — С22
But
t joi
nt
With curvilinear beveling of two edges Bilateral
— — 24 to 100 24 to 100 С23
ГОСТ 14771-76
5
Continuation of tab. 1
Сross-section shape Thickness of welded parts, in mm, for ways of welding Type of
joint Shape of prepared
edges Character of executed
weld of prepared edges of executed weld ИН ИНп ИП УП
Conventional designation of welded joint
With broken beveling of two edges — — 24 to 100 24 to 100 С24
With two symmetric bevelings of two edges
— 6 to 20 6 to 120 6 to 120 С25
With two symmetric curvilinear bevelings of two edges
— — 26.0 to 120.0 С26 But
t joi
nt
With two symmetric broken bevelings of two edges
Bilateral
— — —
26.0 to 120.0
С27
0.5 to 3.0 0.5 to 3.0 0.5 to 4.0 0.5 to 4.0 У1
With flanging of one edge
— 0.8 to 4.0 1.0 to 12.0 1.0 to 12.0 У2
— 0.8 to 4.0 0.8 to 8.0 0.8 to 8.0 Fille
t joi
nt
Without beveling of edges
Unilateral
— 0.8 to 10.0 0.8 to 30.0 0.8 to 30.0
У4
ГОСТ 14771-76
6
Continuation of tab. 1
Cross-section shape Thickness of welded parts, in mm, for ways of welding Type of
joint Shape of prepared
edges Character the executed weld of prepared edges of executed weld ИН ИНп ИП УП
Conventional designation of welded joint
— 0.8 to 4.0 0.8 to 12.0 0.8 to 12.0
Without beveling of edges Bilateral
— 0.8 to 10.0 0.8 to 30.0 0.8 to 30.0
У5
Unilateral — 3.0 to 10.0 3.0 to 10.0 3.0 to 60.0 У6
With one edge beveling
— 3 to 10 3 to 10 6 to 60 У7
With two symmetric bevelings of one edge
Bilateral
— 6 to 20 6 to 20 6 to 100 У8
Unilateral — У9
Fille
t joi
nt
With beveling of two edges
Bilateral —
3 to 20 3 to 20 3 to 60
У10
Tee-butt joint
Without beveling of edges Unilateral
— 0.8 to 40.0 0.8 to 40.0 0.8 to 40.0 Т1
ГОСТ 14771-76
7
Continuation of tab. 1
Cross-section shape Thickness of welded parts, in mm, for ways of welding Type of
joint Shape of prepared
edges Character of executed
weld of prepared edges of executed weld ИН ИНп ИП УП
Conventional designation of welded joint
Without beveling of edges Bilateral — 0.8 to 40.0 0.8 to 40.0 0.8 to 40.0 Т3
Unilateral Т6
With one edge beveling
Bilateral
— 3 to 10 3 to 60 3 to 60
T7
— 6 to 20 6 to 80 6 to 80 Т8
Tee-
butt
join
t
With two symmetric bevelings of one edge Bilateral
— — 12 to 100 12 to 100 Т9
Unilateral 0.8 to 4.0 0.8 to 10.0 0.8 to 60.0 0.8 to 60.0 H1
Ove
rlap
join
t
Without beveling of edges
Bilateral
0.8 to 4.0 0.8 to 10.0 0.8 to 60.0 0.8 to 60.0 Н2
ГОСТ 14771-76
8
4. Design elements of welded joints, their dimensions and maximum deviations for them shall correspond
to those specified in tabs. 2 to 47. Besides the specified ways of welding, it is allowed to apply other ways of arc welding in shielding gases.
Table 2 Dimensions, mm
Design elements b
Con
vent
iona
l de
sign
atio
n of
w
elde
d jo
int
of prepared edges of welded
parts of a weld
Way of welding s
Nom
inal
Max
imum
de
viat
ions
r i е, no more than
0.5 to 0.9 +0.2 1.0 to 1.4 +0.3
1.5 (s+s1)+1.5 ИН
1.5 to 2.0 s+s1 +2
0.5 to 1.4+0.5
1.5 (s+s1)+2.5 С1
* Reference dimension
ИП, УП 1.5 to 4.0
0
+1.0
From s1 to 2s1
From s1 to 3s1
s+s1+3
Table 3
Dimensions, mm Design elements g
Conventional designation of welded
joint of prepared edges of
welded parts of a weld Way of welding s е, no more
than
Nom
inal
Max
imum
de
viat
ions
0.8 to 1.9 3s+2.0 +0.1 ИНп 2.0 to 4.0 2s+2.0 +1.51.0 to 1.9 3s+2.0 2.0 to 6.0
+1.0
7.0 to 9.0 2s+3.0
+2.0 С28
ИП, УП
10.0 to 12.0 2s+4.0
0
+3.0
Table 4
Dimensions, mm
Design elements b
Con
vent
iona
l de
sign
atio
n of
wel
ded
join
t
of prepared edges of welded parts of a weld
Way of welding s
Nom
inal
Max
imum
de
viat
ions
г l е, no more than
0.5 to 0.9 +0.2 1.0 to 1.4 +0.3
3s+1.5 ИН
1.5 to 2.0 2s+2.0 0.5 to 1.4
+0.5 3s+2.5 C3
* Reference dimension ИП, УП 1.5 to 4.0
0
+1.0
s-2s s-3s
2s+3.0
ГОСТ 14771-76
9
Table 5
Dimensions, mm
Design elements b g g1
Con
vent
iona
l de
sign
atio
n of
wel
ded
join
t
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
е, no more than
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
0.5 to 0.9 +0.1 6.0 ±0.1 +0.1 1.0 to 1.4 ±0.3 1.5 to 1.9
+0.2 7.0 +0.5
2.0 to 2.8 8.0 ±0.5
ИН
3.0 to 4.0 +0.3
9.0
0
±1.0
0
+1.0
ИНп ИП,
0.8 to 1.2 1.4 to 2.0 +1.0 7.0 1.0 1.0 +1.0
-0.5 УП 2.2 to 4.0 +1.5 8.0
С2
4.5 to 6.0
0
+2.0 12.0 1.5
±0.5 1.5 ±1.0
Table 6 Dimensions, mm
Design elements b e1 g g1
Con
vent
iona
l des
igna
tion
of
wel
ded
join
t
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
е, n
o m
ore
than
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
0.5 to 0.9 +0.1 6.0 2.0 ±1.0 ±0.1 +0.2
1.0 to 1.5 +0.2 7.0 +0.2 -0.3 +0.5
1.6 to 2.2 8.0 +0.2 -0.5
ИН
2.5 to 4.0+0.3
9.0
0
+0.3 -1.0
+1.0
0.8 to 1.4 +0.5 7.0
0
+0.5 1.5 to 2.2 8.0
0.5 +0.5 -0.2 ИНп
2.5 to 6.0 12.0 1.0 ±0.5 0.5 ±0.5
0.8 to 1.4+1.0
7.0 0.5 +0.5 -0.2
1.5 to 2.8 +1.5 8.0
4.0
1.0 0 +0.5
ИП
3.0 to 6.0 +2.0 12.0 1.5 0.5 ±0.5 0.8 to 1.4 6.0 1.5 to 2.8
+1.57.0
1.0
3.0 to 4.0
0
8.0 1.0 +1.0
-0.5
4.5 to 6.0 9.0 1.5
+1.0 -0.5
С4
УП
7.0 to 8.02.0
+2.012.0
6.0
±2.0
2.0 ±1.0 1.5 ±1.0
ГОСТ 14771-76
10
Table 7
Dimensions, mm
Design elements b g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
е, no more than
Nom
inal
Max
imum
de
viat
ions
δ, no less than
0.5 to 0.9 +0.1 6.0 ±0.1 1.0 to 1.5 +0.2 7.0 1.6 to 2.2 8.0
ИН
2.5 to 4.0 +0.3
10.0
0 ±0.2
0.8 to 1.5 +0.5 7.0 1.6 to 2.2 8.0
0.5 +0.5 -0.2
s
ИНп 2.5 to 6.0 12.0 1.0 ±0.5 3
0.8 to 1.4 +1.0
7.0 0.5 +0.5 -0.2
1.5 to 2.8 +1.5 8.0 1.0 s ИП
3.0 to 6.0 +2.0 12.0 1.5 3 0.8 to 1.4 +1.5 6.0 1.5 to 2.8 7.0
1.0 s
3.0 to 4.0
0
8.0 4.5 to 6.0 9.0
1.5
+1.0 -0.5
С5
УП
7.0 to 8.0 2.0
+2.0
12.0 2.0 ±1.0 3.0
Table 8
Dimensions, mm
Design elements b g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s
Nom
inal
Max
imum
de
viat
ions
е, no more than
Nom
inal
Max
imum
de
viat
ions
δ, no less than
0.5 to 0.9 +0.1 6.0 ±0.1 1.0 to 1.5 +0.2 7.0 1.6 to 2.2 8.0
ИН
2.5 to 4.0 +0.3 10.0
0 ±0.2
0.8 to 1.5 +0.5 7.0 1.6 to 2.2 8.0
0.5 +0.5 -0.2
s
ИНп 2.5 to 6.0 12.0 1.0 ±0.5 3
0.8 to 1.4 +1.0
7.0 0.5 +0.5 -0.2
1.5 to 2.8 +1.5 8.0 1.0 s ИП
3.0 to 6.0 +2.0 12.0 1.5 3 0.8 to 1.4 6.0 1.5 to 2.8
+1.5 7.0
1.0
+1.0 -0.5 s
3.0 to 4.0
0
8.0 4.5 to 6.0 9.0 1.5
С6
УП
7.0 to 8.0 2.0 +2.0 12.0 2.0
±1.0 3
ГОСТ 14771-76
11
Table 9
Dimensions, mm
Design elements b g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
е, no more than
Nom
inal
Max
imum
de
viat
ions
3.0 to 4.0 +0.5 9.0 ИН 4.5 to 6.0 10.0
0 +0.2
3.0 to 4.0 +1.0
9.0 ИНп 4.5 to 6.0 +2.0 10.0
+0.5 -1.0
3.0 to 4.0 +1.0 9.0 ИП 4.5 to 6.0 +2.0 10.0
1.0
УП 3.0 to 4.0 +0.5 8.0 1.5 ±1.0
4.5 to 6.0
0
+1.0 9.0 7.0 to 8.0 10.0
9.0 to 10.01.5
12.0
С7
11.0 to 12.0 2.0 ±1.0
14.0
2.0 ±1.5
Table 10 Dimensions, mm
Design elements b c е g
Con
vent
iona
l des
igna
tion
of
wel
ded
join
t
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
M
axim
um
devi
atio
ns
Nom
inal
M
axim
um
devi
atio
ns
Nom
inal
M
axim
um
devi
atio
ns
Nom
inal
Max
imum
de
viat
ions
α,
deg
rees
, (m
axim
um
devi
atio
ns ±
2°)
3.0 to 3.5 6 3.8 to 4.5 7
+0.5 -1.0
5.0 to 5.5 8 6.0 10 7.0 14 8.0 16 9.0 18
ИНп. ИП
10.0 20
50
3 to 4.0 6 4.5 to 7.0 8 8 to 11.0
1 ±1 1 ±1
14
±2.0
12 to 14 18
1.0±1.0
16 to 18 22 20 to 22 26
±3.0
24 to 26 30 28 to 30 34 32 to 34 38 36 to 40 42
±4.0
42 to 45 46 48 to 53 50
С8
УП
56 to 60
2.0 +1.0 -2.0 2 +1.0
-2.0
54 ±5.0
2.0 +1.0 -2.0
40
ГОСТ 14771-76
12
Table 11
Dimensions, mm
Design elements b c е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
e 1 (m
axim
um
devi
atio
ns ±
2)
Nom
inal
Max
imum
de
viat
ions
g 1 (m
axim
um
devi
atio
ns ±
1)
α, d
egre
es, (
max
imum
de
viat
ions
±2°
)
3.0 to 3.5 6 3.8 to 4.5 7 5.0 to 5.5 8
+0.5 -1.0 1.0
6.0 10 7.0 14 8.0 16 9.0 18
ИНп, ИП
10.0 20
50
3.0 to 4.5 6 5.0 to 7.0 10
8.0 to 11.0
1 ±1 1 ±1
16
±2 4
1.5
12.0 to 14.0 20
1
+1
16.0 to 18.0 24 6
20.0 to 22.0 28 ±3
24.0 to 26.0 32 28.0 to 30.0 36 32.0 to 34.0 40 36.0 to 40.0 44
±4
42.0 to 45.0 48 48.0 to 53.0 52
С9
УП
56.0 to 60.0
2 +1 -2 2 +1
-2
56 ±5
8 2 +1
-2 2.0
40
ГОСТ 14771-76
13
Table 12
Dimensions, mm
Design elements b c е g
Con
vent
iona
l de
sign
atio
n of
wel
ded
join
t
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
α,
deg
rees
, (m
axim
um
devi
atio
ns ±
2°)
3.0 to 3.5 6 3.8 to 4.5 7
+0.5 -1.0
5.0 to 5.5 8 6.0 12 7.0 14 8.0 16 9.0 18
ИНп, ИП
10.0 20
50
3.0 to 4.0 6 4.5 to 7.0 10
8.0 to 11.0
1 ±1 1 ±1
16
±2 1 ±1.0
12.0 to 14.0 2016.0 to 18.0 24 ±3
20.0 to 22.0 30 24.0 to 26.0 34 28.0 to 30.0 38 32.0 to 34.0 42 36.0 to 40.0
+1 -2
46
±4 2 +1.0
-2.0
42.0 to 45.0 50 48.0 to 53.0 54
С10
УП
56.0 to 60.0
2
±2
2 +1 -2
58 ±5 2.5 +1.5
-2.0
40
Table 13
Dimensions, mm
Design elements b е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld W
ay o
f wel
ding
s = s1
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
α, d
egre
es, (
max
imum
de
viat
ions
±2°
)
3.0 to 3.5 7 3.8 to 4.5 8
+0.5 -1.0
5.0 to 5.5 9 6.0 12 7.0 14 8.0 16 9.0 18
ИНп, ИП
10.0 20
50
6 3.0 to 4.0
4.5 to 7.0 10
8.0 to 11.0
0 +3
16
±2 1.0 ±1.0
12.0 to 14.0 20 16.0 to 18.0 24 ±3
20.0 to 22.0 30 24.0 to 26.0 34 28.0 to 30.0 38 32.0 to 34.0 42
C11
УП
36.0 to 40.0
2 ±2
46
±4 2.0 +1.0
-2.0
40
ГОСТ 14771-76
14
Table 14
Dimensions, mm
Design elements b c е g g1
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
e 1
(max
imum
dev
iatio
ns
±2)
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
α,de
gree
s, (m
axim
um
devi
atio
ns ±
2°)
3.0 to 3.5 6 3.8 to 4.5 7
6 +0.5 -1.0 0.5 +0.5
5.0 to 5.5 8 6.0 10 7.0 14 8.0 9.0
18
ИНп, ИП
10.0 20
1.0 +1.0 50
3.0 to 4.0 6 4.5 to 7.0 8
8.0 to 11.0
1 ±1 1 ±1
14
±2 1.0 ±1.0
12.0 to 14.0 18 16.0 to 18.0 22
±3
8
20.0 to 22.0 26 24.0 to 26.0 30 28.0 to 30.0 34 32.0 to 34.0 38 36.0 to 40.0 42
±4
42.0 to 45.0 46 48.0 to 53.0 50
С12
УП
56.0 to 60.0
2.0 +1.0 -2.0 2.0 +1.0
-2.0
54 ±5
10 2.0 +1.0
-2.0
2.0 ±1.0 40
ГОСТ 14771-76
15
Table 15
Dimensions, mm
Design elements e g
Con
vent
iona
l de
sign
atio
n of
wel
ded
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
r (m
axim
um d
evia
tions
±1
)
Nom
inal
Max
imum
de
viat
ions
e 1 (m
axim
um d
evia
tions
±2
)
Nom
inal
Max
imum
de
viat
ions
g 1 (m
axim
um d
evia
tions
±1
)
18 to 20 17
22 to 24 18 ±2
26 to 28 20
2
30 to 34 22 36 to 40 24
±3
42 to 45 26
48 to 53 28
56 to 60
8
30
±4
10 2 +1 -2
63 to 65 34 70 to 75 38 80 to 85 42
±5
90 to 95 44
С13
ИП, УП
100
10
46 ±6
12 3 +1 -3
3
Table 16 Dimensions, mm
Design elements е
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way of welding s = s1
h (maximum deviations
+1) Nominal Maximum deviations
e1 (maximumdeviations
±2)
18 to 20 14 22 to 24 16 26 to 30
10 18
32 to 36 21 38 to 42 23
±3
45 to 48 25
50 to 53 27
10
56 to 60 29
±4
63 to 70 33 75 to 80 37 85 to 90 41
С14 ИП, УП
95 to 100
12
45
±5 12
ГОСТ 14771-76
16
Table 17
Dimensions, mm
Design elements b c е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
M
axim
um
devi
atio
ns
Nom
inal
M
axim
um
devi
atio
ns
Nom
inal
M
axim
um
devi
atio
ns
Nom
inal
M
axim
um
devi
atio
ns
α,de
gree
s, (m
axim
um
devi
atio
ns ±
2°)
6 to 9 7 10 to 12 9 14 to 16 13
ИНп
18 to 20 17
50
8 to 11 8 12 to 14 10 16 to 20
1 ±1 1 ±1
12
1 ±1
22 to 26 16 28 to 32 18 34 to 38 22 40 to 44 26 46 to 50 30
±2
52 to 56 34 58 to 62 38 64 to 70 42
±3
72 to 80 46 82 to 90 50
±4
С15
ИП, УП
92 to 100
2 +1 -2 2 +1
-2
54 ±5
2 +1 -2
40
Table 18
Dimensions, mm
Design elements е
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way of welding s = s1 r
(max
imum
dev
iatio
ns
+1)
Nom
inal
Max
imum
de
viat
ions
g (m
axim
um d
evia
tions
+1
-2
)
30 to 34 16 36 to 40 17 42 to 45 18 48 to 53 20 56 to 60
8
22 63 to 70 24 75 to 80 26 85 to 90 28
±3
95 to 100 30 105 to 110 32
±4
2 С16
ИП, УП
120
10
34 ±5 3
ГОСТ 14771-76
17
Table 19
Dimensions, mm
Design elements b c е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
α, d
egre
es, (
max
imum
de
viat
ions
±2°
)
3.0 to 4.0 6
4.5 to 5.5 7
6.0 8
7.0 10
30 ИНп, ИП
8.0 12
9.0 to 10.0 14
3.0 to 4.5 6
5.0 to 7.0 8
8.0 to 10.0
1.0 ±1.0 1.0 ±1.0
10
±2
11.0 to 14.0 13
16.0 to 18.0 16 ±3
1 ±1
20.0 to 22.0 20
24.0 to 26.0 24
28.0 to 30.0 28
32.0 to 34.0 32
36.0 to 40.0 36
±4
42.0 to 45.0 40
48.0 to 53.0 44
С17
УП
56.0 to 60.0
2.0 +1.0 -2.0 2.0 +1.0
-2.0
50
±5
2 +1 -2
20
ГОСТ 14771-76
18
Table 20
Dimensions, mm
Design elements b c е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
e 1
(max
imum
dev
iatio
ns
±2)
Nom
inal
Max
imum
de
viat
ions
α, d
egre
es, (
max
imum
de
viat
ions
±2°
)
3.0 to 3.5 6
3.8 to 4.5 7 +0.5 -1.0
5.0 to 5.5 8
6.0 10
ИНп, ИП
7.0 to 8.0 12
9.0 to 10.0 14
3.0 to 4.0 8
30
4.5 to 7.0 10
8.0 to 11.0
1.0 ±1.0 1.0 ±1.0
12
±2.0 4.0 1.0
±1.0
12.0 to 14.0 15
16.0 to 18.0 18 ±3.0 6.0
20.0 to 22.0 22
24.0 to 26.0 26
28.0 to 30.0 30
32.0 to 36.0 34
38.0 to 42.0 38
±4.0
45.0 to 48.0 42
50.0 to 53.0 46
С18
УП
56.0 to 60.0
2.0 +1 -2 2.0 +1
-2
52
±5.0
8.0
2.0 +1 -2
20
ГОСТ 14771-76
19
Table 21
Dimensions, mm
Design elements b c е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
α, d
egre
es, (
max
imum
de
viat
ions
±2°
)
3.0 to 3.5 6 3.8 to 4.0 7
+0.5 -1.0
5.0 to 5.5 9 6.0 10 7.0 11 8.0 12
ИНп. ИП
9.0 14 10.0 16
30
3.0 to 4.0 8 4.5 to 7.0 10
8 to 11
1 ±1 1 ±1
12
±2 1.0 ±1.0
12 to 14 16 16 to 18 20
±3
20 to 22 26 24 to 26 30 28 to 30 34 32 to 36
+1 -2
38 38 to 42 44
±4
45 to 48 48 50 to 53 52
С19
УП
56 to 60
2
±2
2 +1 -2
56 ±5
2.0 +1 -2
20
ГОСТ 14771-76
20
Table 22
Dimensions, mm
Design elements b c е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
α, d
egre
es, (
max
imum
de
viat
ions
±2°
)
3.0 to 3.5 5 3.8 to 4.5 6
+0.5 -1.0
5.0 to 5.5 8 6.0 9 7.0 10 8.0 11 9.0 12
ИНп. ИП
10.0 14
3 to 4 8
30
4.5 to 7 10 8 to 11
1 ±1 1 ±1
12
±2 1.0 ±1.0
12 to 14 16 16 to 18 20
±3
20 to 22 26 24 to 26 30 28 to 30 34 32 to 36
+1 -2
38 38 to 42 42 45 to 48 46 50 to 53 50
С20
УП
56 to 60
2
±2
2 +1 -2
54
±4 2.0 +1
-2
20
ГОСТ 14771-76
21
Table 23
Dimensions, mm
Design elements b c е g g1
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld W
ay o
f wel
ding
s = s1
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
e 1 (m
axim
um d
evia
tions
±2
)
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
α, d
egre
es, (
max
imum
de
viat
ions
±2°
)
3.0 to 3.5 6 ±1
3.8 to 4.5 1.0 ±1 1.0 ±1
7 6 +0.5
-1.0 0.5 +0.5
5.0 to 5.5 8
6.0 10
7.0 to 8.0 12
ИНп. ИП
9.0 to 10.0 14
30
3.0 to 4.0 6
4.5 to 7.0 8
8 to 11 10
±2 1.0
±1.0 1.0 +1.0
12 to 14 13
16 to 18 16 ±3
8
20 to 22 20
24 to 26 24
28 to 30 28
32 to 36 32
38 to 42 36
44 to 48 40
50 to 54 44
С21
УП
56 to 60
2 +1 -2 2 +1
-2
48
±4 10
2.0 +1 -2 2.0 ±1.0
20
ГОСТ 14771-76
22
Table 24
Dimensions, mm
Design elements b g g1
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld W
ay o
f wel
ding
s = s1
Nom
inal
Max
imum
de
viat
ions
с
(max
imum
dev
iatio
ns
±0,5
)
e (m
axim
um d
evia
tions
±2)
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
4 to 5.5 +0.2 2.0 7 +0.5 -1.0 +1
6 to 7 8
8 to 9 +0.5 3.0
10
1.0 ±1.0
10 to 12 12
14 to 16 16
С22
ИНп, ИП
18 to 20
0
+1.0 3.5
18
2.0 +1 -2
0 +2
Table 25 Dimensions, mm
Design elements е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld W
ay o
f wel
ding
s = s1
r (m
axim
um d
evia
tions
±1
)
Nom
inal
Max
imum
de
viat
ions
e 1 (m
axim
um d
evia
tions
±2
)
Nom
inal
Max
imum
de
viat
ions
g 1 (m
axim
um d
evia
tions
±1
)
24 to 28 28
30 to 34 30
36 to 40 32
±4
42 to 45 34
48 to 50 36
10
53 to 56 38
±5
60 to 63 40
65 to 70 43 ±6
2 +1 -2 2
75 to 80 48
85 to 90 52 ±7
C23
ИП, УП
95 to 100
8
58 ±8
12
3 +1 -3 3
ГОСТ 14771-76
23
Table 26
Dimensions, mm
Design elements е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
e 1 (m
axim
um
devi
atio
ns ±
2)
Nom
inal
Max
imum
de
viat
ions
g 1 (m
axim
um
devi
atio
ns ±
1)
24 to 28 22 30 to 34 25
±5
36 to 40 28 42 to 45 30 48 to 50 33
10
53 to 56 35 60 to 63 38
±6
65 to 70 40
2 +1 -2 2
75 to 80 43 ±7
85 to 90 48
С24
ИП, УП
95 to 100 53 ±8
12
3 +1 -3 3
Table 27 Dimensions, mm
Design elements b c е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
M
axim
um
devi
atio
nsN
omin
al
Max
imum
de
viat
ions
N
omin
al
Max
imum
de
viat
ions
N
omin
al
Max
imum
de
viat
ions
α,
deg
rees
, (m
axim
um
devi
atio
ns ±
2°)
6 to 9 7 10 to 12 9 14 to 16 12
ИНп
18 to 20 15
30
6 to 9 6 10 to 12 8 14 to 16 10 18 to 20
1 ±1 1 ±1
12
1 ±1
22 to 28 15
±2
30 to 36 18 38 to 45 20
±3
48 to 53 24 56 to 60 28 63 to 70 32 75 to 80 36
+4
85 to 90 40 95 to 100 44
±5
105 to 110 48
С25
ИП,
УП
120
2.0 +1-2 2.0 +1
-2
52 ±6
2 +1-2
20
ГОСТ 14771-76
24
Table 28
Dimensions, mm
Design elements е
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1
Nom
inal
Max
imum
de
viat
ions
g (maximum deviations
+1 -2)
26 to 30 20 32 to 36 22
±3
38 to 42 23 45 to 48 24 50 to 53 25 56 to 60 26
±4 2
63 to 70 30 75 to 80 32
±5
85 to 90 34 95 to 100 36
±6
105 to 110 38
С26
ИП, УП
120 40 ±7
3
Table 29 Dimensions, mm
Design elements е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s = s1 h 1
(max
imum
dev
iatio
ns
+1)
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
26 to 30 17
32 to 36 19
38 to 42 20
45 to 48 21
±4
50 to 53 22
56 to 60 24 ±5
2 +1 -2
63 to 70 26
75 to 80 28
85 to 90
10
30
95 to 100 34
±6
105 to 110 37
С27
УП
120
12
40 ±7
3 +1 -3
ГОСТ 14771-76
25
Table 30
Dimensions, mm Design elements b
Conventional designation of welded
joint of prepared edges of
welded parts of a weld
Way
of w
eldi
ng
s
Nom
inal
Max
imum
de
viat
ions
r l е, no more than
0.5 to 0.9 +0.2 1.0 to 1.4 +0.3 ИН,
ИHп 1.5 to 3.0 0.5 to 1.4 +0.5 У1
ИП, УП 1.5 to 4.0
0
+1.0
s to 2s s to 3s 2s+3
*Reference dimension
Table 31
Dimensions, mm
Design elements е g Conventional designation of welded joint of prepared edges of
welded parts of a weld
Way of welding s
Nominal Maximum deviations Nominal Maximum
deviations
0.8 to 1.5 2 ИНп
1.6 to 4.0 4 1.0 to 1.5 2 1.6 to 4.5 4
+3 +1
5.0 to 9.0 8 У2
ИП, УП 10.0 to
12.0 12
+5
0
+2
Table 32 Dimensions, mm
Design elements b Conventional designation of welded
joint of prepared edges of
welded parts of a weld
Way of welding s
Nominal Maximum deviations
п
0.8 to 5.5 +0.5 ИНп
6 to 10 0.8 to 6.0
+10
7.0 to 11.0 +1.5 У4
ИП, УП 12.0 to 30.0
0
+2.0
Over 0.5s to s
ГОСТ 14771-76
26
Table 33
Dimensions, mm
Design elements b е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way of welding s
Nom
inal
Max
imum
de
viat
ions
п
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
0.8 to 1.4 3 1.5 to 2.0 5
±1 +1.0
2.2 to 3.2 1 ИНп
3.5 to 4.0
+05
8 ±2
0 +1.5
0.8 to 1.4 4 1.5 to 2.8 6 ±1 +1.0
3.0 to 5.0 8 +1.5
У4
ИП, УП
5.5 to 8.0
0
+1.0
0 to 0.5s
12 ±2 1.0
+2.0
Table 34 Dimensions, mm
Design elements b е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s
Nom
inal
Max
imum
de
viat
ions
п
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
0.8 to 1.4 3 ±1 1.5 to 2.0 5
+1.0
2.2 to 3.2 1 ИНп
3.5 to 4.0
+0.5
8 ±2 +1.5
0.8 to 1.4 4 1.5 to 2.8 6
±1 +1.0
3 to 5 8 5.5 to 8.0 12
±2 +1.5
У5
ИП, УП
9.0 to 12.0
0
+1.0
0 to 0.5s
15 ±3
0
+2.0
Table 35 Dimensions, mm
Design elements b Conventional designation of welded
joint of prepared edges of
welded parts of a weld
Way of welding s
Nominal Maximum deviations
п
0.8 to 5.5 +0.5 ИНп 6.0 to 10.0 0.8 to 6.0 +1.0
7.0 to 11.0 +1.5 У5
ИП, УП 12.0 to 30.0
0
+2.0
Over 0.5s to s
ГОСТ 14771-76
27
Table 36
Dimensions, mm
Design elements b c е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld W
ay o
f wel
ding
s
Nominal Maximum deviations Nominal Maximum
deviations Nominal Maximum deviations Nominal Maximum
deviations
α, d
egre
es, (
max
imum
de
viat
ions
±2°
)
3.0 to 3.5 6 3.8 to 4.5 7
+0.5 -1.0
5.0 to 5.5 8 6.0 10 7.0 14 8.0 16 9.0 18
ИНп, ИП
10.0 20
50
3.0 to 4.0 6 4.5 to 7.0 8
8.0 to 11.0
1 ±1 1 ±1
14
±2
12.0 to 14.0 18
1.0 ±1.0
16.0 to 18.0 22 20.0 to 22.0 26
±3
24.0 to 26.0 30 28.0 to 30.0 34 32.0 to 35.0 38 38.0 to 42.0 42
±4
45.0 to 48.0 46 50.0 to 53.0 50
У6
УП
56.0 to 60.0
2.0 +1 -2 2.0 +1
-2
54 ±5
2.0 +1 -2
40
ГОСТ 14771-76
28
Table 37
Dimensions, mm
Design elements b c е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s
Nominal
Max
imum
de
viat
ions
Nominal
Max
imum
de
viat
ions
Nominal
Max
imum
de
viat
ions
Nominal
Max
imum
de
viat
ions
α, d
egre
es, (
max
imum
de
viat
ions
±2°
)
3.0 to 3.5 6 3.8 to 4.5 7
+0.5 -1.0
5.0 to 5.5 8 6.0 10 7.0 14 8.0 9.0
18
ИНп, ИП
10.0 20
50
3.0 to 4.0 6 4.5 to 7.0 8
8.0 to 11.0
1 ±1 1 ±1
14
±2 1.0 ±1.0
12.0 to 14.0 18 16.0 to 18.0 22
±3
20.0 to 22.0 26 24.0 to 26.0 30 28.0 to 30.0 34 32.0 to 34.0 38 36.0 to 40.0 42
±4
42.0 to 45.0 46 48.0 to 53.0 50
У7
УП
56.0 to 60.0
2.0 +1 -2 2.0 +1
-2
54 ±5
2.0 +1 -2
40
ГОСТ 14771-76
29
Table 38
Dimensions, mm
Design elements е e1 g = g1
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
α,
deg
rees
, (m
axim
um
devi
atio
ns ±
2°)
6 to 9 7 5 10 to 12 9 7 ±1
14 to 16 13 11 ИНп, ИП
18 to 20 17 15
50
6 to 10 8 6 11 to 16 10 818 to 22 13 11 24 to 28 16 14
1 ±1
30 to 34 19 17 36 to 40 22 20 42 to 45 26 24 48 to 53 30
±2
28
±2
56 to 63 38 36 65 to 70 42 ±3 40 ±3
75 to 80 46 44 85 to 90 50 ±4 48 ±4
У8
УП
95 to 100 54 ±5 52 ±5
2 +1 -2
40
Table 39 Dimensions, mm
Design elements b c е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
M
axim
um
devi
atio
ns
Nom
inal
M
axim
um
devi
atio
ns
α, d
egre
es, (
max
imum
de
viat
ions
±2°
) 3.0 to 4.5 8 5.0 to 8.0 12
9.0 to 12.0 16 14.0 to 16.0 20
ИНп, ИП
18.0 to 20.0 24
30
3.0 to 4.5 6 5.0 to 8.0
1.0 ±1.0 1.0 ±1.0
10 9.0 to 12.0 13
14.0 to 16.0 16 18.0 to 20.0 20
±2 1 ±1
22.0 to 24.0 24 26.0 to 30.0 28 32.0 to 36.0 32
±3
38.0 to 42.0 36 44.0 to 48.0 40
±4
50.0 to 53.0 44
У9
УП
56.0 to 60.0
2.0 +1.0-2.0 2.0 +1.0
-2.0
50 ±5
2 +1 -2
20
ГОСТ 14771-76
30
Table 40
Dimensions, mm
Design elements b c е g
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld W
ay o
f wel
ding
s
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
α,
deg
rees
, (m
axim
um
devi
atio
ns ±
2°)
3.0 to 4.5 1 5.0 to 8.0 12
9.0 to 12.0 16 14.0 to 16.0 22
ИНп, ИП
18.0 to 20.0 28
30
3.0 to 4.5 6 5.0 to 8.0
1.0 ±1.0 1.0 ±1.0
10 9.0 to 12.0 13
14.0 to 16.0 16 18.0 to 20.0 19
±2 1 ±1
22.0 to 24.0 22 26.0 to 30.0 26 32.0 to 36.0 32
±3
38.0 to 42.0 36 45.0 to 48.0 40
±4
50.0 to 53.0 44
У10
УП
56.0 to 60.0
2.0 +1.0-2.0 2.0 +1.0-
2.0
48 ±5
2 +1 -2
20
Table 41 Dimensions, mm
Конструктивные elements b Conventional designation of welded joint
of prepared edges of welded parts of a weld
Way of welding s
Nominal Maximum deviations
Т1 0.8 to 3.0 +0.5
3.2 to 5.5 +1.0
6.0 to 20.0 +1.5
T3
ИНп, ИП, УП
22.0 to 40.0
0
+2.0
ГОСТ 14771-76
31
Table 42
Dimensions, mm
Design elements b c е
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
α, d
egre
es, (
max
imum
de
viat
ions
±2°
)
3.0 to 4.0 7 4.5 to 6.0 10 ИНп
7.0 to 10.0 1655
3.0 to 4.0 6 4.5 to 6.0 8
7.0 to 10.0
+1 1 ±1.0
12
±2
11.0 to 14.0 1616.0 to 18.0 20
±3
20.0 to 22.0 24 24.0 to 26.0 2828.0 to 30.0
+2
32 32.0 to 34.0 36 36.0 to 40.0 40
±4
42.0 to 45.0 44 48.0 to 53.0 48
Т6
ИП, УП
56.0 to 60.0
0
+3
2.0 +1.0 -2.0
52 ±5
45
Table 43 Dimensions, mm
Design elements b c е
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
α, d
egre
es, (
max
imum
de
viat
ions
±2°
) 3.0 to 4.0 7 4.5 to 6.0 10 ИНп
7.0 to 10.0 16 55
3.0 to 4.0 6 4.5 to 6.0 8
7.0 to 10.0
+1 1.0 ±1.0
12
±2
11.0 to 14.0 16 16.0 to 18.0 20
±3
20.0 to 22.0 2424.0 to 26.0 28 28.0 to 30.0
+2
32 32.0 to 34.0 36 36.0 to 40.0 42
±4
42.0 to 45.0 46 48.0 to 53.0 50
Т7
ИП, УП
56.0 to 60.0
0
+3
2.0 +1.0 -2.0
54 ±5
45
ГОСТ 14771-76
32
Table 44
Dimensions, mm
Design elements b c е
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s
Nom
inal
.Max
imum
de
viat
ions
Nom
inal
,Max
imum
de
viat
ions
Nom
inal
,Max
imum
de
viat
ions
g (maximum deviations
±2°)
α, d
egre
es, (
max
imum
de
viat
ions
±2°
)
6 to 9 7 10 to 12 9 14 to 16 12
ИНп
18 to 20 16
55
6 to 9
1 ±1 1 ±1
8 10 to 12 10
±2
14 to 18 12 20 to 24 14
±3
26 to 30 16 32 to 36 20 38 to 42 24
±4
45 to 48 28 50 to 53 32 56 to 60 36 63 to 65 40 70 to 75 44
Т8
ИП, УП
80
2 +1 -2 2 +1
-2
48
±5
0.08s to 0.25s
45
Table 45 Dimensions, mm
Design elements b е
Con
vent
iona
l des
igna
tion
of w
elde
d jo
int
of prepared edges of welded parts of a weld
Way
of w
eldi
ng
s
Nom
inal
Max
imum
de
viat
ions
Nom
inal
Max
imum
de
viat
ions
g
(maximum deviations
±2°)
12 to 16 10 18 to 22 12 24 to 28 14 30 to 34
+2
16 36 to 40 18 42 to 45 20 48 to 53 22 56 to 60 24
±2
63 to 65 26 70 to 75 30 80 to 85 34
±3
90 to 95 38
Т9
ИП, УП
100
0
+3
40 ±4
0.05s to 0.15s
ГОСТ 14771-76
33
Table 46
Dimensions, mm Design elements b B
Conventional designation of welded joint
of prepared edges of welded parts of a weld
Way of welding s
Nominal Maximum deviations
0.8 to 3.0 +0.2 3.0 to 12.0 ИН 3.2 to 4.0 5.0 to 16.0 0.8 to 5.0
+0.5 3.0 to 20.0
ИНп 5.5 to 10.0 +1.0 8.0 to 40.0 0.8 to 2.0 +0.5 2.2 to 5.0
3.0 to 20.0
5.5 to 10.0 +1.0
8.0 to 40.0 11.0 to 28.0 +1.5 12.0 to 100.0
HI
ИП, УП
30.0 to 60.0
0
+2 30.0 to 240.0
Table 47
Dimensions, mm Design elements b Conventional
designation of welded
joint of prepared edges of
welded parts of a weld
Way of welding s
Nominal Maximum deviations
B
0.8 to 3.0 +0.2 3.0 to 12.0 ИН
3.2 to 4.0 5.0 to 16.0 0.8 to 5.0
+0.5 3.0 to 20.0
ИНп 5.5 to 10.0 +1.0 8.0 to 40.0 0.8 to 2.0 +0.5 2.2 to 5.0
3.0 to 20.0
5.5 to 10.0 +1.0
8.0 to 40.0 11.0 to 28.0 +1.5 12.0 to 100.0
Н2
ИП, УП
30.0 to 60.0
0
+2.0 30.0 to 240.0 (Amended Wording, Amendment Nos. 1, 2 and 3). 5. When executing the root of multilayered weld by a way of welding, differing from the main way used
for filling of beveled edges, the values of design elements of welded joint shall be chosen according to the main way of welding. And in this case the way of welding shall be designated as a fraction, whose numerator is the designation of the way of welding of a weld root, and denominator is the designation of the main way of welding.
6. For welded joints of types С12, С21, С23, С24, У7, У10, Т7, having parts thickness s = 12 mm and more, and also for joints of types С15, С16, С25, С27, У8, Т8, having parts thickness s = 20 mm and more, executed by way of welding УП, there is allowed the blunting c = 5 mm (±2)
Table 48 Thickness of thin part Difference of parts thicknesses
2 to 3 4 to 30
32 to 40 Over 40
1 2 4 6
7. Butt-joint welding of parts with unequal thicknesses, when the thickness difference does not exceed the
values specified in tab. 48, shall be executed in the same way as for parts with identical thickness; design elements of prepared edges and dimensions of a weld shall be chosen by the greater thickness.
ГОСТ 14771-76
34
Inclination of a weld surface (fig. 1) is allowed to provide the smooth transition from one part to another. When the thickness difference of welded parts exceeds the values specified in tab. 48, then the part with
greater thickness s1 shall be beveled on one or two sides to the thickness of the thin part s as it is specified in figs. 2 and 3. And in this case the design elements of prepared edges and dimensions of a weld shall be chosen by the smaller thickness.
Fig. 1 Fig. 2 Fig. 3
8. The dimension and maximum deviations of fillet weld leg K and К1 shall be established during designing. And in this case the dimension of a fillet weld leg shall be of no more than 3 mm for the parts up to 3 mm thick inclusive and 1.2 of the thickness of more thin part when welding the parts over 3 mm thick. Maximum deviations of the dimension of a fillet weld leg from the nominal value are specified in Appendix 4.
(Amended Wording, Amendment No. 3). 9. (Removed, Amendment № 1). 10. (Removed, Amendment No. 3). 11. There is allowed the convexity or concavity of a fillet weld up to 30 % of its leg, but no more than 3
mm. And in this case the concavity shall not result in reduction of leg value Кп (fig. 4), established during designing.
Fig. 4
N o t e . Fillet weld leg Кп is the leg of the greatest rectangular triangle inscribed in external part of the fillet weld. In case of symmetric weld any of equal legs may be accepted as leg Кп, and in case of asymmetrical weld the smaller one shall be accepted as leg Кп.
(Amended Wording, Amendment No. 3). 12. Displacement of edges in relation to each other is allowed before welding in amount of no more than: 0.2 s mm - for parts up to 4 mm thick; 0.1s+0.5 mm - for parts of 5 to 25 mm thick; 3 mm - for parts of 25 to 50 mm thick; 0.045+1.0 mm - for parts of 50 to 100 mm thick; 0.01s+4.0 mm, but no more than 6 mm - for parts more than 100 mm thick. 13. When welding in carbonic gas with aid of electrode wire of 0.8 to 1.4 mm in diameter it is allowed to
apply the main types of welded joints and their design elements in accordance with GOST 5264 to 80. 14. The minimal values of fillet weld legs are specified in Appendix 1. 15. When using the welding in carbonic gas instead of manual arc welding the leg of designed fillet weld
may be reduced to the values specified in Appendix 2. 16. When welding in carbonic gas with aid of electrode wire providing the obtaining of a weld metal with
higher ultimate strength, than that of a basic metal, the leg of designed fillet weld may be reduced to the values specified in Appendix 3.
14 to 16. (Subsequently Inserted, Amendment No. 1).
ГОСТ 14771-76
35
17. In butt, tee-butt and fillet joints more than 16 mm thick, executed in assembly conditions, it is allowed
to increase the nominal value of dimension b up to 4 mm. And in this case the weld width е, е1 may be accordingly increased.
18. The increase of weld dimensions up to 30 % of the nominal value is allowed in places of overlapping of welds and in places of correction of defects.
19. During preparation of edges with application of manual tools the maximum deviations of beveling angle of edges may be increased up to ±5°. And in this case the weld width е, е1 may be accordingly changed.
17 to 19. (Subsequently Inserted, Amendment No. 3).
APPENDIX 1 Recommended
mm Minimal fillet weld leg for thickness of more thicker one from the welded elements
Yield point of welded steel, МПа from 3 to 4 over 4 to 5 over 5 to 10 over 10
to 16 over 16
to 22 over 22
to 32 over 32
to 40 over 40
to 80
Up to 400 3 3 4 5 6 7 8 9 Over 400 up to 450 3 4 5 6 7 8 9 10
Note. The minimal value of a fillet weld leg shall not exceed 1.2 of the thickness of thinner element.
APPENDIX 2 Recommended
mm Fillet weld leg for ways of welding
In carbonic gas with aid of wire of grade Св-08Г2С from 1.4 to 2.0 mm in diameter instead of electrodes of type
In carbonic gas with aid of wire of grade Св-08Г2С from 0.8 to 1.2 mm in diameter instead of electrodes of
type Manual arc
Э42А and Э42 Э46А and Э46 Э50А and Э50 Э42А and Э42 Э46А and Э46
4 3 3 3 4 4 5 3 4 4 4 5 6 4 4 5 5 6 7 5 5 6 6 7 8 5 6 6 7 8 9 6 7 7 8 8
10 7 7 8 9 9 11 7 8 10 9 10 12 8 10 12 10 11 13 10 12 13 11 12 14 10 13 14 12 13 15 13 14 15 13 14 16 14 15 16 14 15 17 14 16 17 14 16 18 15 17 18 15 17 19 16 18 19 16 18 20 17 19 20 17 19
Note. The specified data does not apply to joints which are executed when welding with lengthened stick-out
distance or with direct current polarity.
ГОСТ 14771-76
36
APPENDIX 3
Recommended
Fillet weld leg for the ratio of weld metal ultimate strength to basic metal ultimate strength
1.0 1.1 1.2 1.3 1.4
4 4 4 3 3 5 5 4 4 4 6 6 5 5 4 7 7 6 6 5 8 7 7 6 6 9 8 8 7 7
10 9 9 8 7 11 10 9 9 8 12 11 10 9 9 13 12 11 10 9 14 13 12 11 10 15 14 13 12 11 16 15 14 13 12 17 16 14 13 12 18 17 15 14 13 19 17 16 15 14 20 18 17 16 14
APPENDICES 1 to 3. (Subsequently Inserted, Amendment № 1).
ГОСТ 14771-76
37
APPENDIX 4
Recommended mm
Nominal dimension of fillet weld leg Maximum deviations of fillet weld leg dimension from nominal value
Up to 5 inclusive +1.0 -0.5 Over 5 to 8 inclusive +2.0 -1.0 Over 8 to 12 inclusive +2.5 -1.5 Over 12 +3.0 -2.0
APPENDIX 4. (Subsequently Inserted, Amendment No. 3).
ГОСТ 14771-76
38
Editor V.N. Kopysov Technical Editor L.L. Guseva Proof-reader M.V. Buchnaya
Computer Imposition L.A. Krugovaya
