Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. इंटरनेट मानक “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda “Invent a New India Using Knowledge” “प0रा1 को छोड न’ 5 तरफ” Jawaharlal Nehru “Step Out From the Old to the New” “जान1 का अ+धकार, जी1 का अ+धकार” Mazdoor Kisan Shakti Sangathan “The Right to Information, The Right to Live” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 6630 (1985): Seamless ferritic alloy steel pipes for high temperature steam service [MTD 19: Steel Tubes, Pipes abd Fittings]
Transcript
Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.
इंटरनेट मानक
“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru
“Step Out From the Old to the New”
“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan
“The Right to Information, The Right to Live”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
“Invent a New India Using Knowledge”
है”ह”ह
IS 6630 (1985): Seamless ferritic alloy steel pipes forhigh temperature steam service [MTD 19: Steel Tubes, Pipesabd Fittings]
IS:6630-1985
Indian Standard SPECIFICATION FOR
SEAMLESS FERRITIC ALLOY STEEL PIPES FOR HIGH TEMPERATURE STEAM SERVICES
( First Revision )
First Reprint AkIL 1996
UDC 621.643.2-977[669.15-194.57-462.31
Q-5
0 Copyright 1986
BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
N6W DELHI 110002
February 1986
--.- .- .-. _ _ ___“_
IS:6630-1985
Indian Standard SPECIFICATION FOR
SEAMLESS FERRITIC ALLOY STEEL PIPES FOR HIGH TEMPERATURE STEAM SERVICES
( First Revision )
Steel Tubes, Pipes and Fittings Sectional Committee, SMDC 22
Chairman Representing
SHRI S. C. DHINQRA Ministry of Industry
Members Sntu A. S. AGARWAL
Sum R. S. PATHAK ( Alternate ) Steel Tubes of India Ltd. Dewas
SHRI K. N. AI~UIA FedgF;e;: Engineering Industries of India,
SHRI A. S. SHARMA ( Alternate ) SHRI S. N. BASU Directorate General of Supplies & Disposals
SHRI T. N. UBOVEJA ( Alternute ) ( Inspection Wing ), New Delhi
SIBI H. S. BEDI Steel Authority of India Ltd ( Rourkela Steel
SHRI P. K. MOHAPATRA ( Alternate j Plant ). Rourkela
Sum D. P. BHAT~ACHARJBB SHRI S. C. ARORA (Alternate)
SHIU P. K. CHAKRAVARTY Sruu A. N. MIIXA (Alternate )
Sum B. B. CHAKRAVBRTI Sum A. K. SHOMB ( Alternute )
SHRI L. M. CHAUDHRI
SHKU K. K. GANDHI ( Alternute ) SHRI S. C. GUFTA
Export Inspection Council, Calcutta
Tata Iron & Steel Co Ltd, Jamshedpur
Superintendence Co of India (P) Ltd, Calcutta
Publ~h~;;~~partment ( Public Health Branch ),
As&&n of Indian Engineering Industry, New
SHRI N. P. JYOI-I ( Alternute ) LT-COL V. B. JADHAV Engineers-in-Chief’s Branch, Army Headquarters,
New Delhi . . SHRI J. C. MENLNRATTA ( Aftbmure 1
(Continued on page 2)
0 Copyright 1986 BUREAU OF INDIAN STANDARDS
‘Ibis publication is protected under the Indian Copyright Act ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act.
Is:6630-1985
( Continuedfrompage 1 )
Members Representing
JOINT DIRECTOR STANDARDS ( MP/ Research Designs & Standards Al ) ( M’nistry of Railways ) Lucknoworganization
CXEMIST & MBTALLUROIST - I, RDSO ( Alternate ) .
SZIRI SUSHIL JAIN SHRI V. K. GUP~A .( Alternate )
Jain Tube Co Ltd. Ghaziabad
SHRI S. C. JAIN SIIRI A. S. SHARMA ( Alternate )
Jindal Pipes Pvt Ltd, Ghaziabad
Smu N. P. JYOTI Bharat Steel Tubes Ltd. New Delhi SHIU R. K. ABROL ( Alternate 1
SHRI H. M. KAUL \ ’ Ministry of Agriculture SHRI M. G. KESAVA RAO Hindustan Shipyard Limited, Vishakhapatnam
SHRI P. L. NARASIMHAM ( Alternate 1 SHRI B. KUMAR
SHRI T. K. BASU ( Alternate) !&RI S. KUMAR
S&warts & Lloyds of India Ltd, Calcutta
SHRI S. CHANDRA ( Alternate ) Indian Register of Shipping, Bombay
DR M. D. MAHESHWARI SHRI D. DUITA ( Alternate )
Indian Tube Co Ltd, Jamshedpur
SHRI K. MUKHERJE~! Fertilizer ( Planning & Development ) India Ltd, dndri
SHRI R. K. SINHA ( Alternate ) SHRI K. N. R. NAIR Tube Products of India, Madras
DR INCX S. K. SEN ( Alternate ) SHRI S. NEELAKANTAN
DR A. R. KESKAR ( Ahernate) Zenith Steel Pipes & Industries Ltd, Khopdi
Sruu RAJ JASWANT SINGH Dir&Ny;t;eFbyneral of Technical Development,
SHRI G. P. SARABHAI Oil & Natural Gas Commission, Dehra Dun SARIV. K. CHATURVEDI ( Alternate)
SHRI V. A. SATHGURUNATH Bharat Heavy Electricals itd, Tiruchchirappalli SHRI V. RAGHAVENDRAN ( Alternate 1
SHRI APOORVA SHAH SHRI H. J. THAKER I Alternate )
SHFU E. SUBBA RAO SHRI P. C. JOHAR: ( Alternate )
SHRI B. R. TANEJA SHRI 0. J?. KAKKAR ( Alternate j
sujarat Steel Tubes Ltd, Ahmadabad
Indian Oil Corporation Ltd, Bombay
Indian Seamless Metal Tubes Ltd, Bombay
Central Boilers Board, New Delhi
Director General, IS1 ( &-oficio Member ) ._. ,
SHRI K. K. VISWANATHA‘M ’ SHRI G. S. GOSAL ( Althmate )
SHRI K. RA~HAVENDRAN, _ Director ( Strut & Met ) ( Secretury 1
Joint Secretary
SHRI P. N. KOHLI Supervisor ( Drawings ) ( Strut & Met ), ISI
( Cotttinued on page 17 )
2
IS:6630 -1985
Indian Standard
SPECIFICATION FOR SEAMLESS FERRITIC ALLOY STEEL PIPES FOR
HIGH TEMPERATURE STEAM SERVICES
( First Revision )
0. FOREWORD
0.1 This Indian Standard ( First Revision ) was adopted by the Indian Standards Institution on 28 June 1985, after the draft finalized by the Steel Tubes, Pipes and Fittings Sectional Committee had been approved by the Structural and Metals Division Council.
0.2 Specification for seamless ferritic alloy steel pipes for high temperature services was first published in 1972 to meet the increased application of ferritic alloy steel pipes. A revision of the standard has been prepared incorporating the following main changes:
4
b)
New designations of steel have been incorporated in accordance with IS : 1762 ( Part 1 )-1974*. A provision has been made for instrumental analysis of the metals.
0.2.1 Elevated temperature properties as given earlier in IS : 6630 - 1972t and in Appendix A have been retained after review, till further data on indigenous steel is available.
0.2.2 Tubes for heat exchangers and stills are not covered by this standard.
0.3 In preparing this standard assistance has been derived from the follow- ing:
IS0 2605/2-1976 Steel products for pressure purposes - Derivation and verification of elevated temperature properties - Part 2 : Proof stress of austenitic steel products. International Organization for Standardization.
*Code for designation of steels: Part 1 Based on letter symbols (first revision ). tSpecification for seamless ferritic alloy steel pipes for high temperature service.
3
IS:6630 - 1985
DIN 17175 : 1959 Seamless tubes of high temperature steel. Deutscher Normenausschuss.
ASTM : A 335-1981 Seamless ferritic alloy steel pipe for high tempera- ture service. American Society for Testing and Materials.
0.4 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accor- dance with IS : 2-1960*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.
1. SCOPE 1.1 This standard covers the requirements for seamless ferritic ailoy steel pipes intended for high temperature steam service. in this standard are given in Table 1.
Several grades covered
TABLE 1 CHEMICAL COMPOSITION
(CIauses1.1,4.1,4.1.1,4.1.2,4.2and4.3)
GRADE ~RCJINTAGEOF~EMENTS
DESIGNATION r--~-__A-.-_ ----v [REP IS : 1762- ( PART l )-1974* C Si Mn P, Max S. Max Cr MO V OLD DEESIONA- TTON ]
(1) (2) (3) (4) (5) (6) (7) (8) (9) ( 16Mo2_0)
lXr4Mo6 ( 15CrWM~5J
lOCr9M~O ( 10Cr2Mol)
20Cr20Mo6 ( 10CrSMo55_)
( 14Cr45Mo 6OV2fi -
o-12 to 0.20
@zzo 0.15,
Max 0’15, Max
0.10 to 0.18
0.10 to a35
@lo to 0.35
0.50,
ZY Ma;
&lo to 0.35
040 to 0940 O-80
OF7F 0940
@oY,,‘” 0*040 0.40 to 0.030 0.70 0.40 to @040 0.70
0.040 -
0.040 0.70 to 1.10
o@O % to 0.030 4.0 to
6.0 0.040 0.30 to
0.60
0.25 to - 0.35
0.45 to - 0.65
09Oto - 1.20
oz” - 0.50 to 0.22
0.70 to 0.32
*Code for designation of steels: Part 1 Based on letter symbols (firsr revision ).
*Rules for rounding off numerical values ( revised ).
4
IS: 6630 -1985
2. SUPPLY OF MATERIAL
2.1 General requirements relating to the supply of ferritic alloy steel pipes shall conform to IS : 1387-1967*.
3. MANUFACTURE
3.1 Steel shall be manufactured by open hearth, electric, basic oxygen or a combination of these processes. In case any other process is employed by the manufacturer, prior approval of the purchaser should be obtained. If the basic oxygen process is employed for manufacture, the nitrogen con- tent of the steel shall not exceed 0.007 percent.
3.2 Sufficient discard should be made from each ingot or billet to secure freedom from harmful piping and undue segregation.
3.3 The pipes shall be made by a seamless process and shall be either hot finished or cold finished, subject to agreement between the purchaser and the manufacturer.
4. CHEMICAL COMPOSITION
4.1 Pipes shall be manufactured from steels which when analysed in accor- dance with the methods specified in IS : 228t and its relevant parts shall conform to the chemical composition given in Table 1.
4.1.1 The chemical analysis of steel shall be as given in Table 1.
The analysis of steel shall be carried out either by the method specified in IS : 228t and its relevant parts or any other established instrumental/ chemical method. In case of dispute the procedure given in IS : 228t and its relevant parts shall be the referee method. However, where the method is not given in IS : 2287 and its relevant parts, the referee method shall be as agreed to between the purchaser and the manufacturer.
4.1.2 Elements not quoted in Table I, shall not be intentionally added without the agreement of the purchaser, other than for the purposes of finishing the heat. All reasonable precautions shall be taken to prevent the addition of such elements from scrap or other materials used in the manu- facture, but residual elements may be present provided the mechanical properties and applicability are not adversely effected.
*General requirements for the supply of metallurgical materials (first revision ).
tMethods of chemical analysis of steels.
IS:6630-1985
4.1.3 All steels shall be fully killed. Aluminium content shall not exceed 0.02 percent.
4.2 Ladle Analysis - The steel of each heat shall have ladle anylysis to the grades and chemical composition as given in Table 1.
4.3 Product Analysis - Product analysis of one pipe from each batch of pipe of the same size and wall thickness and from the same heat of’steel shall be made. The results of this analysis shall not differ from the values specified in Table 1 by amounts greater than given below:
Element
1
Carbon
Manganese
Sulphur and phosphorus Chromium Molybdenum
Vanadium
5. HEAT TREATMENT
Maximum qf Speci/ication
: (2) GO-20
t
GO.50 <o*so <0*040 g6.0 90.35
t
>o-35- 1.20 GO.32
Permissible Deviation from the Specified
Composition
(3) fo-03
. fO*05
f f0.10 -+0905 &O*lO f O*04
I
*o-o5 50.03
5.1 Pities conformlng to grade 20Cr20Mo6 ( lOCr5Mo55 ) shall be supplied in the annealed condition. Pipes conforming to grade 16Mo30 shall be supplied in the normalized or normalized and tempered condition. Pipes conforming to grade 15Cr4Mo6 ( 15Cr90Mo55 ) and 14Cr45Mo 60 V27 shall be supplied in the normalized and t&per&d condition. &pes Gnfbiming to grade lOCr9MolO ( lOCr2Mol ) may be supplied in the annealed or normalized and tempered condition.
6. DIMENSIONS
6.1 Dimensions of pipes shall conform to the requirements specified in Table 2.
6.2 Tolerances - The tolerances on outside diameter and wall thicknest shall conform to the requirements specified below and in 6.2.1.
6
IS:6630-1985
NOMINAL BORE
(1)
15
40 50
%
100 125 150
NOTE - Sizes agreement.
TABLE 2 DIMENSIONS OF PIPES - i*
( CZuuse 6.1 )
All dimensions in millimetres.
OUTSIDE DIAMETER
(2)
21.3 269 33.7 42.4
% 73.0 88’9
114-3 141.3 168.3 219-l 273-O 323.9 355.6 406.4
other than those specified here may be
WALL THICKNESS
(3)
;:; 3.2 3.6 3-6 4’0
;:6”
6.3 7.1 8.8, 7-l
11.0, 8
14’2, 10,6*3 16, 11,8-O 175. 11.8-O 20, 12.5, 8’8
ordered by mutual
6.2.1
Nominal Pipe Size Tolerance Up to and including 40 mm f0.5 mm Above 40 mm fl percent
Tolerances on wall thickness shall be as under:
Tolerances on Wall Thickness
Seamless All sizes Unlimited -12.5 percent
6.3 Pipes may be supplied in random lengths of 4 to 7 metres. If ordered in exact lengths as agreed to between the supplier and the purchaser, pipes shall be subjected to a plus tolerance of 6 mm.
7. FREEDOM FROM DEFECTS
7.0 The finished pipe shall be reasonably straight and free from injurious defects. _ _ .,
__. .I’ I r ”
7
IS : 6630 - 1985
7.1 Depth of Injurious Defects - All defects shall be explored for depth. When the depth is in excess of 5 percent of the nominal wall thickness or encroaches on the minimum wall thickness, such defects shall be considered injurious.
7.2 Machiniug or Grinding Defects not Classified Injurious - Surface defects not classified as injurious shall be treated as follows.
7.2.1 Pipe showing scabs, seams, laps, tears or slivers not more than 5 percent of the nominal wall thickness, need not have these defects removed. If deeper than 5 percent, such defects shall be removed by machi- ning or grinding, provided that the remaining wall thickness is within the specified limits.
7.2.2 Pipe showing inside or outside surface checks ( fish scale ) 0.4 mm or less in depth need not have_ these defects removed. Such defects over 0.4 mm but not more than 0.8 mm in depth shall be removed by machining or grinding. Pipes on which these defects are more than 0.8 mm in depth shall be rejected, unless the manufacturer can demonstrate to the purchaser that the defects are not injurious.
7.2.3 Mechanical marks or abrasions and pits shall be acceptable without grinding or machining provided the depth does not exceed 1.6 mm. If such defects are deeper than 1.6 mm these shall be removed by grinding or machining to sound metal, and the remaining wall thickness shall be within the specified limits.
7.2.4 When defects have been removed by grinding or machining the outside diameter at the point of grinding or machining may be reduced by the amount so removed. Should it be impracticable to secure a direct measu- rement, the wall thickness, at the point of grinding or at a defect not required to be removed, shall be determined by deducting the amount removed in grinding or the depth of the defect from the minimum measured wall thickness at the ends of the pipe; and the remainder shall not be less than the minimum required wall thickness.
8. MECHANICAL TESTS
8.0 For material heat-treated in batch type furnace, tests shall be made on 5 percent of the pipe from each treated lot. For small lots at least one pipe shall be tested. For material heat-treated by thecontinuous process, tests shall be made on a sufficient number of pipes to constitute 5 percent of the lot, but in no case less than 2 pipes.
The manufacturer shall provide at his own expense extra tube at the rate of 2 percent of each diameter and thickness of tube specified and the Inspecting Officer shall select for test such of the tubes as he may think
8
Is:6630-1985
proper to the extent of the percentage mentioned. Should the number of tubes specified or any one nominal size exceed 400, then, for every 100 tubes or part thereof above that number, one additional tube shall be provided. The samples for testing shall not be heat-treated after selection.
NOTE - The term ‘lot’ applies to all pipes of the same nominal size and wall thickness which are produced from the same heat of steel and subjected to the same finishing treatment in continuous furnaces: when final heat treatment is in a batch type furnace, the lot shall include only that pipe which is heat-treated in the same fur- nace charge.
8.1 Tensile Test - The yield strength, tensile strength and the percentage elongation of the steel tubes when determined in accordance with IS : 1894- 1972* shall conform to the values specified in Table 3.
8.2 Flattening or Bend Test
8.2.1 For pipe sizes 50 mm NB and below bend test shall be carried out. For pipes over 50 mm NB flattening test shall be carried out.
8.2.1.1 Flattening test - The flattening test shall be carried out in accordance with IS : 2328-1963t. The test piece shall consists of 63.5 mm long pipe taken from one end of each selected pipe. The test piece shall be flattened cold between parallel plates and shall show no crack or flaw when the distance between the plates is not greater than H.
J.f_ (l+C)a C+a
where H=
a=
D=
C=
D
distance between the plates (mm), specified thickness (mm), specified outside diameter (mm), and a constant depending on the grade of steel=0*87.
NOTB; 1 - Surface imperfection revealed during flattening test,. shall be removed by grinding and shall be checked for the minimum required wall th&cness.
NOTE 2 - Superficial rUptu& resulting from surface imperfections shall not be a cause for rejection.
8.2.1.2 Bend test shall be carried out in accordance with IS : 2329- 1963:. A suf&cient length of tube shall be bent cold through 90” around
*Method for tensile testing of steel tubea. *Method for flattening test on steel tubes. $Method for bend test on steel tube-s.
9
TABLE 3 TENSILE REQUIREMENTS
(Clause 8.1 )
STEIIL GRADE REFERENCE HEAT
TREATMENT
E; (1) (2) 16Mo30 N, N+T 15CT!x%4055 N+T lOCrYMo5S A 1OCr2Moi A
N+T N+T
lKr45Mo6OV27 N+T - --
HEAT TREATMENT TENSILE YIELD ELONOATION
----- k_- -7 STRENGTH STREN- ON 5.65@ Normalized or Annealed Tempered MPa GTH MPa PERCENT r--------- ----h---7- Min Min Min Tempeeture 0000~ Temygature Cb&g
tiOll tion
(3)
900-940 900-960 850-880
900-960 900-960 900-960
930-980
(4)
a
;
f a a a
(5) (6) (7)
600-650 a 440-590 640-720 a 440-590
- - 410-560
- - 410-560 650-780 a 490-640
650-750 a 490-640 640-720 a 460-610
(8) (9)
250 22
250 22 205 20
175 20 275 16
275 15 275 15
N-Normalized. a = Aircooled. N+T=Normalized and tempered. f = Furnace cooled.
A = Annealed.
a cylindrical mandrel the diameter of which is 12 times the nominal dia- meter of the tube, without developing cracks.
rs:6630-1985
8.3 Hydraulic Test
8.3.1 Each tube shall be tested at the manufacturer’s work with hydraulic pressure of 1.5 times the design pressure but in no case less than 7 MPa ( 700N/cm2 ) nor greater than the pressure P calculated from the following formula:
where
P = test pressure in MPa, S = stress in N/mm2 which shall be taken as 80 percent of the
minimum yield stress at room temperature, t = specified thickness in mm, and d = outside diameter in mm.
NOTE - 1 MPa = 1 N/mm* = O-102 kgf/mm’.
8.3.2 The test pressure shall be maintained sufficiently long but not less than 5 seconds for proof and inspection. Any tube failing to withstand the hydraulic pressure test shall be deemed not to comply with the standard.
8.4 Non-destructive Testing - By an agreement between the manufacture and the purchaser the tubes may be subjected to non-destructive testing by a suitable method including the reference standards.
9. RETESTS
9.1 If the test specimen representing a heat fails to conform to the require- ments specified in 4, an analysis of each pipe from the same heat may be made and all pipes conforming to the requirements shall be accepted.
9.2 If the test specimen representing a lot of pipes fails to conform to the requirements specified in 8.1 and 8.2, the manufacturer may elect to make retests on two additional lengths from the same lot. If both the retest specimens conform to the requirements, all the lengths in the lot shall be accepted except the length from which the initial specimen was taken. If one or both of the retest specimens fail to conform to the specified requirements, the manufacturer may elect to test individually the remaining
\engths in the lot, in which case determinations are required only for the particular requirements with which the specimens failed to comply with the preceding tests.
11
IS : 6630 - 1985
10. MARKING
10.1 The pipes shall be marked with the following particulars:
a) Manufacturer’s name or trade-mark, b) Nominal size and thickness,
c) Grade, d) Heat number, and e) Type of steel.
10.1.1 steel:
The following symbols may be used for indicating the type of
Electric furnace steel E Open hearth steel R Basic oxygen BO
10.1.1.1 Suitable symbols may be used for steel made by other appro- ved processes.
10.2 BIS Certification Marking
The product lnay also be marked with Standard Mark.
10.2.1 The use of the Standard Mark is governed by the provisions of Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The details of conditions under which the ticence for the use of- Standard Mark may be granted to manufacturers or producers may be obtained froin the Btireau of Indian Standards.
11. TEST CERTlFICATE
11.1 If specified in the order, the supplier shall furnish certified copies of test certificate containing the following:
a) Purchaser’s order number; b) Specification, title and grade; c) Heat number; d) Nominal size, wall thickness and quantity of pipes; e) Product analysis; f) Results of mechanical tests at room temperature; g) Results of any supplementary test; and h) Signatures and stamp of inspecting authority.
12
APPENDIX A ( Clause 0.2.1 )
ELEVATED TEMPERATURE PROPERTIES
A-l. The elevated temperature yield stress properties of the steels are as given in Table 4.
TABLE 4 ELEVATED TEMPERATURE YIELD STRESS
t; STEU GRADE REFERENCE YIELD STRESS IN MPa AT TEMPERATURE
