1、BRITISH STANDARD BS 3604-2: 1991 Steel pipes and tubes for pressure purposes: ferritic alloy steel with specified elevated temperature properties Part 2: Specification for longitudinally arc welded tubesBS3604-2:1991 This British Standard, having been prepared under the direction of the Iron and Ste
2、el Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 30 September1991 BSI 09-1999 First published June 1963 Second edition September 1973 Third edition, as BS 3604-2, September 1991 The following BSI references relate to the work on this stand
3、ard: Committee reference ISM/73 Draft for comment 89/46286 DC ISBN 0 580 19854 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Iron and Steel Standards Policy Committee (ISM/-) to Technical Committee ISM/73, upon which the following bo
4、dies were represented: Associated Offices Technical Committee BEAMA Ltd. British Compressed Air Society British Forging Industry Association British Gas plc British Steel Industry Electricity Supply Industry in United Kingdom Engineering Equipment and Materials Users Association Lloyds Register of S
5、hipping Power Generation Contractors Association (BEAMA Ltd.) Process Plant Association The Welding Institute Coopted members The following bodies were also represented in the drafting of the standard, through subcommittees and panels: British Fluid Power Association British Welded Steel Tube Associ
6、ation Confederation of British Industry Energy Industries Council Stainless Steel Fabricators Association of Great Britain Amendments issued since publication Amd. No. Date CommentsBS3604-2:1991 BSI 09-1999 i Contents Page Committees responsible Inside front cover Foreword iii 1 Scope 1 2 Informatio
7、n to be supplied by the purchaser and options to be documented 1 3 Designation 1 4 Manufacture of the steel 3 5 Manufacture of the product 3 6 Chemical analysis 3 7 Final supply condition 4 8 Mechanical properties 4 9 Visual inspection and appearance 4 10 Tolerances 5 11 Tests 6 12 Number, selection
8、 and preparation of samples and test pieces 6 13 Test methods 7 14 Retests 8 15 Test certificate 8 16 Protective coating 8 17 Marking 9 Appendix A Designations of steel tubes in BS 3604-2 and the nearest equivalent designations in ISO 2604-VI 10 Appendix B Dimensional limits of tubes 10 Appendix C P
9、rocedure for verification of elevated temperature proof stress values 10 Appendix D Ultrasonic testing of the weld seam for the detection of longitudinal and transverse imperfections 11 Appendix E Radiographic acceptance limits 12 Figure 1 Example of lower confidence lines for steel type622 11 Figur
10、e 2 Examples of maximum distribution patterns of indicated elongated slag inclusion type discontinuities 13 Figure 3 Examples of maximum distribution patterns of indicated circular slag inclusion and gas pocket type discontinuities 14 Table 1 Chemical composition and mechanical properties at room te
11、mperature 2 Table 2 Permitted deviations of the product analysis from the specified ladle analysis 3 Table 3 Tube forming process and final supply condition 4 Table 4 Final heat treatment 4 Table 5 Minimum 0.2% proof stress (R p0.2 ) values at elevated temperatures 5 Table 6 Designations of steel tu
12、bes in BS 3604-2 and the nearest equivalent designations in ISO2604-VI 10BS3604-2:1991 ii BSI 09-1999 Page Table 7 Parameters for lower confidence lines: steel types 620 and 621 10 Table 8 Parameters for lower confidence lines: steel type622 10 Table 9 Reference notch dimensions and tolerances for l
13、ongitudinal imperfections 12 Table 10 Reference hole drill diameter and tolerance for transverse imperfections 12 Table 11 Elongated slag inclusion type discontinuities 12 Table 12 Circular slag inclusion and gas pocket type discontinuities 13 Publication(s) referred to 16BS 3604-2:1991 BSI 09-1999
14、iii Foreword This Part of BS3604 has been prepared under the direction of the Iron and Steel Standards Policy Committee. It complements BS3604-1 which specifies seamless and electric resistance welded alloy tubes, and BS3602-2 which specifies carbon and carbon manganese steel longitudinally arc weld
15、ed tubes. This Part of BS 3604 is one of a series specifying requirements for steel pipes and tubes for pressure purposes. Other standards in the series are as follows. BS3601, Specification for carbon steel pipes and tubes with specified room temperature properties for pressure purposes. BS3602, Sp
16、ecification for steel pipes and tubes for pressure purposes: carbon and carbon manganese steel with specified elevated temperature properties Part1:Specification for seamless and electric resistance welded including induction welded tubes Part2: Longitudinally arc welded tubes. BS3603, Specification
17、 for carbon and alloy steel pipes and tubes with specified low temperature properties for pressure purposes. BS3604, Steel pipes and tubes for pressure purposes: ferritic alloy steel with specified elevated temperature properties Part1: Specification for seamless and electric resistance welded tubes
18、. BS3605:1973, Specification for seamless and welded austenitic stainless steel pipes and tubes for pressure purposes. BS3605, Austenitic stainless steel pipes and tubes for pressure purposes Part1: Specification for seamless tubes. This Part of BS3604 takes account of current production procedures
19、for longitudinally arc welded tubes. It contains three chromium, molybdenum types of steel. The steels covered by this Part of BS3604 are generally regarded as being weldable. However, care should be taken and welding should be carried out in accordance with the appropriate British Standards for wel
20、ding. The corresponding steels in BS1501-2 meet the requirements of the steels in this Part of BS3604. Tubes complying with this Part of BS3604 are subject to non-destructive testing of the weld seam. The designation of steel tubes in this Part of BS3604 and their nearest equivalent designations in
21、ISO2604-VI are given in Appendix A for information purposes. This Part of BS3604 is aligned as far as possible with corresponding material requirements and test procedures now agreed for incorporation in documents by the International Organization for Standardization (ISO). For class40 tubes, the sp
22、ecified elevated temperature yield or proof stress values are those derived from national data by the procedure described in BS3920. Additionally, provision is made for the application of the related procedure for verifying that a product consistently meets specified levels of elevated temperature v
23、alues. It is recommended that the results of elevated temperature tests, together with information on the product thickness, the room temperature tensile properties and the chemical composition of the material, should be sent to the Secretary of ISM/73/-/1, British Standards Institution, 3 York Stre
24、et, Manchester M22AT, UK, so that, for future revisions of of this Part of this Standard, minimum elevated temperature proof stress values can be derived from a continuously updated data bank. Impact test values are not specified in this Part of BS3604 but if the purchaser requires an impact test to
25、 be carried out then it is recommended that the Charpy impact test should be carried out in accordance with BSEN10045-1.BS3604-2:1991 iv BSI 09-1999 The appropriate British Standards for the design and construction of boilers, pressure vessels, pipework, etc. should be consulted for requirements rel
26、ating to the application and permissible design stress for products made in accordance with this Part of this Standard. Assessed capability. Users of this British Standard are advised to consider the desirability of assessment and registration of a suppliers quality systems against the appropriate P
27、art of BS5750 by a third party certification body. It is outside the scope of this Part of BS3604 to specify formal qualifications for personnel engaged in testing but it is emphasized that the operation of all equipment should be supervised by competent, trained personnel. For the purpose of this P
28、art of BS3604, no difference is intended in the meaning between “pipe” and “tube” though idiomatic use prefers sometimes the one and sometimes the other. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their co
29、rrect application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi to iv, pages1to16, an inside back cover and a back cover. This standard has been updated (see copyrig
30、ht date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS3604-2:1991 BSI 09-1999 1 1 Scope This Part of BS3604 specifies requirements for plain end, longitudinally arc welded ferritic alloy steel tubes suitable for pressure purposes
31、. Tubes manufactured in accordance with this Part of BS3604 have specified room temperature properties and specified proof stress values at elevated temperatures. In addition to the definitive requirements this Part of BS3604 requires the items detailed in2.1 to be documented. It also requires optio
32、ns selected by the purchaser from those detailed in2.2 to be documented. For compliance with this Part of BS3604 both the definitive requirements and the documented items have to be satisfied. NOTE 1The range of diameters and thicknesses appropriate to this Part of BS3604 is given in Appendix B for
33、guidance. NOTE 2The titles of the publications referred to in this standard are listed on the inside back cover. 2 Information to be supplied by the purchaser and options to be documented 2.1 Information to be supplied by the purchaser The following information shall be supplied by the purchaser and
34、 shall be fully documented: a) the designation of the tubes, i.e.the number and Part of this British Standard, the type of steel, and the final supply condition, (see clause3), e.g.BS3604-2:622: class20; b) the tube outside diameter and thickness; c) the tube length if exact (see10.9); d) the quanti
35、ty in metres or numbers of lengths. 2.2 Options to be documented A number of options are permitted by this Part of BS3604 as listed below and the purchaser shall identify the options required. Both the definitive requirements specified throughout this Part of BS3604 and the following documented item
36、s stated by the purchaser shall be satisfied by the manufacturer before a claim of compliance with this Part of BS3604 can be made and verified by the manufacturer. In the event that the purchaser does not indicate his requirements at the time of enquiry or order the manufacturer shall select the op
37、tions where appropriate: a) the steelmaking process see 4.1 and15 k); b) whether welding procedure details and evidence of welding procedure approval are required (see5.2); c) whether evidence of welder or welding machine operator approval is required (see5.2); d) whether additional procedure approv
38、al is required (see5.2); e) whether a product analysis is required see6.2 and15 l); f) whether the content of selected chemical elements additional to those specified are to be reported see6.3 and15 m); g) whether the upper limit above which the dressing of surface imperfections is required will be1
39、.5 mm (see9.8); h) whether end sizing is required (see10.8); i) whether lengths other than random are required (see10.9); j) whether the hydraulic test is to be carried out at a pressure in excess of140 bar 1)and the pressure required (see13.3); k) the method of non-destructive testing to be used (s
40、ee13.4); l) whether additional non-destructive testing of the weld is required (see13.5.1); m) the quality grade to which the plate is to be tested (see13.5.2); n) whether verification of elevated temperature proof stress values is required for class40 tubes (see13.6.1); o) whether verification of e
41、levated temperature proof stress values by testing is required (see13.6.2) and the temperature selected from Table 5 at which this is to be carried out; p) whether the tubes are to be supplied uncoated or with the manufacturers normal mill coating (see clause16); q) whether marking requirements to B
42、S5383 are required (see17.1 and17.4). 3 Designation The tubes shall be designated by the number and Part of this British Standard, i.e.BS3604-2, by a number which indicates the type of steel (see Table 1) and the class number which indicates the final supply condition (see clause7). For example, BS3
43、604-2:622:class20, designates longitudinally arc welded tube made from steel type622, in the stress relieved condition. NOTEThe designations for tubes in this Part of BS3604 and their nearest equivalent designations in ISO2604-VI are listed in Appendix A for information. 1) 1 bar = 10 5N/m 2= 10 5Pa
44、.BS 3604-2:1991 2 BSI 09-1999 Table 1 Chemical composition and mechanical properties at room temperature Steel type Type number Chemical composition (ladle analysis) (see notes1 and2) Mechanical properties at room temperature (seenote7) C Si Mn P S Cr Mo Cu Ni Others R m R e A min max min max min ma
45、x max max min max min max max max (see note6) min max min min % % % % % % % % % % % % % % % N mm 2 N mm 2 N mm 2 % 1 % chromium 0.5 % molybdenum 620 (seenote3) 0.09 0.18 0.15 0.40 0.40 0.65 0.025 0.015 0.80 1.15 0.45 0.60 0.30 0.30 Al met0.02 max. 480 600 340 18 1.25 % chromium 0.5 % molybdenum 621
46、(seenote4) 0.09 0.17 0.50 0.80 0.40 0.65 0.025 0.015 1.00 1.50 0.45 0.60 0.30 0.30 Al met0.02 max. 515 690 340 18 2.25 % chromium 1 % molybdenum 622 (seenote5) 0.09 0.15 0.50 0.30 0.60 0.025 0.015 2.00 2.50 0.90 1.10 0.30 0.30 Al met0.02 max. 515 690 310 16 NOTE 1Elements not quoted in Table 1 shall
47、 not be intentionally added without the agreement of the purchaser, other than for the purpose 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 manufacture. Elements added for the purpose of finishing
48、the heat shallbereported. NOTE 2For permitted deviations on product analysis, see Table 2. NOTE 3Steel complying with BS1501-2:620 meets the requirements of steel type620. NOTE 4Steel complying with BS 1501-2:621 meets the requirements of steel type 621. NOTE 5Steel complying with BS 1501-2:622/515
49、meets the requirements of steel type 622. NOTE 6Where a maximum Al metof 0.02 % is specified, determination of the total aluminium content, provided it does not exceed the specified value, shall be deemed to meet this requirement. In cases of dispute, the metallic aluminium content shall be determined. NOTE 7R eis the yield strength. For acceptance purposes either the upper yield strength R eHor the 0.5 % proof strength (total elongation) R t0.5may be used (see 13.1.2). R mis the tensile strength; A is the percentage elongatio
