eeJB47082000钢制压力容器焊接工艺评定EN.doc

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1、本英文版为内部资料，仅供参考，以中文版为准。The Chinese version of standards has precedence to their English translations which are only for internal reference.中华人民共和国行业标准Industrial Standard of the Peoples Republic of China JB 47082000JB/T 47092000JB 47442000钢制压力容器焊接工艺评定钢制压力容器焊接规程钢制压力容器产品焊接试板的力学性能检验Welding procedure qual

2、ification for steel pressure vesselsWelding specification for steel pressure vesselsMechanical property tests of product welded testcoupons for steel pressure vesselsIssuance：15-08-2000Implementation：01-10-2000Issued Jointly byThe State Bureau of IndustryThe State Bureau of Petroleum and Chemical In

3、dustryNotice for the Issuance of Four Industrial Standardssuch as“Welding Procedure Qualification for Steel Pressure Vessels”etc.No.：SMIB 2000 401All sectors involved,This is to notify that in accordance with the Approval Procedures of Pressure Vessels Industrial Standards as stipulated by the State

4、 Quality & Technology Supervision Bureau, the four industrial standards such as Welding Procedure Qualification for Steel Pressure Vessels are to be released with the individual number and designation as follows：Compulsive standards：JB 47082000Welding Procedure Qualification for Steel Pressure Vesse

5、ls（to replace JB 47081992）JB 47102000Steel Tower Vessel（to replace JB 47101992）JB 47442000Mechanical Property Tests of Product Welded Test Coupons for Steel Pressure Vessels（to replace GB 1501998 Appendix E）Recommended standards：JB/T 47092000Welding Specifications for Steel Pressure Vessels（to repla

6、ce JB/T 47091992）The above standards will be implemented from October 1，2000. The State Standard Technology Committee of Pressure Vessel will be wholly responsible for the release of these standards in due time.Regards，The State Machinery Industrial BureauThe State Petroleum & Chemical Industrial Bu

7、reauAugust 15，2000ContentsJB 4708-2000 Welding procedure qualification for steel pressure vessels4Preface41.Scope52.Quoted standards53. Terminologies64.General principles75.Welding procedure qualification regulations for butt and fillet welding seam 86. Welding procedure qualification regulations fo

8、r corrosion-resisting bead welding217. Test requirements and result evaluation23Appendix A (appendix for standard) Welding procedure qualification for stainless steel compound steel36Appendix B (appendix for prompts) Welding procedure instruction and the recommended patterns of welding procedure qua

9、lification record38JB/T 4709-2000 Welding specification for steel pressure vesselsPreface1. Scope2. Quoted standards3. Welding materials4. Welding procedure qualification and welder5.Preparation before welding6. Welding7. Post heating8. Post weld heat treatment9. Welding seam re-repairing10Welding i

10、nspectionAppendix A (appendix for standards) Welding specification for stainless steel compound steelAppendix B (appendix for prompts) Recommended form of welding procedure instructionJB 4744-2000 Mechanical property tests of product welded test coupons for steel pressure vessels1. Scope2. Quoted st

11、andards3. Symbols4. The manufacturing requirements of product welded test coupons5. Test sample preparation of product welded test coupons6. The tensile test7. The bending test8. The impact test9. Re-testJB 4708-2000 Welding procedure qualification for steel pressure vessels中华人民共和国行业标准Industrial Sta

12、ndard of the Peoples Republic of ChinaJB 4708-2000To replace JB 4708-1992钢制压力容器焊接工艺评定Welding procedure qualification for steel pressure vessels1. ScopeThis standard stipulates welding procedure qualification regulations, testing method and qualified indexes for steel pressure vessels.The standard is

13、 suitable for welding procedure qualification of gas welding, welding rod electrical arc welding, submerged arc welding, gas metal-arc welding, gas tungsten-arc welding, electro slag welding, corrosion-resisting bead welding, etc. for steel pressure vessels.2. Quoted standardsThe articles included i

14、n the following standards become articles of the standard by quotation. When being published, all versions of the standards are valid. Since all standards will be revised, every user shall seek the possibility of adopting the latest version of the following standards.GB150-1998 steel pressure vessel

15、s GB/T 228-1987 metals tensile testing methodGB/T229-1994 metals impact testing method of xiabi notchGB/T 232-1988 metals bending testing methodGB713-1997 steel plates for boilerGB/T 912-1989 thin hot-rolled steel plates and steel strips of carbon structural steel and low-alloy structural steelGB308

16、7-1982 seamless steel pipe for low and middle pressure boilerGB/T 3274-1988 thick hot-rolled steel plates and steel strips of carbon structural steel and low-alloy structural steelGB/T 3280-1992 cold-rolled stainless steel platesGB3531-1996 low alloy steel plates for low-temperature pressure vessels

17、 (including the No.1 modification list)GB/T 4237-1992 hot-rolled stainless steel platesGB5310-1995 seamless steel pipe for high-pressure boilerGB6479-1986 seamless steel pipe for fertilizer equipmentGB6654-1996 steel plates for pressure vessels (including the No.1 and No.2 modification list)GB/T 816

18、3-1987 seamless steel pipe for conveying liquidsGB9948-1988 seamless steel pipe for oil crackingGB13296-1991 seamless stainless steel pipe for boilers heat exchangerGB/T 14976-1994 seamless stainless steel pipe for conveying liquidsJB4726-2000 the forged pieces of carbon steel and low alloy steel fo

19、r pressure vessels JB4727-2000 the forged pieces of low alloy steel for low-temperature pressure vesselsJB4728-2000 the stainless steel forged pieces for pressure vesselsJB4730-1994 the non-destructive detection for pressure vessels3. TerminologiesThe standard adopts the following definitions.3.1 We

20、lding procedure qualificationThe experimental procedure and result evaluation carried out for verifying the correctness of welding pieces drafted welding procedure.3.2 Welding procedure instructionThe welding procedure documents drawn up for verification experiments, and passing evaluation and to be

21、 used to guide the production.3.3 Procedure qualification recordThe record reporting which made a record of a result of the verification experiments in designated forms and evaluated the correctness of the drafted welding procedure.3.4 Welded jointThe joint point where two or more than two parts wil

22、l be welded or have been welded together, when inspecting joints property, the interaction of the different sections, such as the welding seam, the molten area and the heat-affected zone, even with materials, should be taken into account.3.5 WeldmentThe pressure vessels or other parts joined by weld

23、ing, the weldment including base metals and welded joints.3.6 Test pieceThe weldment for welding procedure qualification test manufactured according to the predetermined welding procedure. The test piece includes base metal and welded joints.3.7 Post weld heat treatmentThe heating process that can c

24、hange the tissues and properties of welded joints or their remaining stress.3.8 Lower transformation temperatureThe phase change temperature during the heating process where begins to form into austenite. 3.9 Upper transformation temperatureThe phase change temperature during the heating process whe

25、re finishes austenite forming.3.10 Transverse bendThe bend because of the axis of the welding seam is perpendicular to the longitudinal axis of the test piece.3.11 Longitudinal bendThe bend because of the axis of the welding seam is parallel to the longitudinal axis of the test piece.3.12 Face bendT

26、he bend because of the tensile surface of the test piece is the front side of the welding seam. The surface which has larger welding seam width is called the front face; if the welding seam widths in both sides are equal, then the face whose surface-covering welding seam is first finished is the fro

27、nt face.3.13 Root bendThe bend because of the tensile surface of the test piece is the reverse side of the welding seam.3.14 Side bendThe bend because of the tensile surface of the test piece is the transverse section of the welding seam.4. General principles4.1 The welding procedure qualification s

28、hould be based on reliable steel welding properties and finished before welding products.4.2 The general process of welding procedure qualification is: drawing up the welding procedure instruction, welding test pieces and manufacturing test samples, inspecting test pieces and samples, measuring if w

29、elded joints have the required utility properties, submitting welding procedure qualification record and evaluating the welding procedure instruction.The welding procedure qualification verifies the correctness of welding procedure drawn up by the welding unit and judges its capability.4.3 For the T

30、-type joints and angle joints, whose cross section have been welded all, but their interior defects can not be detected and the manufacturing unit has no capability to ensure the welding throughout, then the modeling test piece should be manufactured for welding procedure qualification and the weldi

31、ng shall be allowed only after affirmation by dissection test.4.4 The equipment and instruments for welding procedure qualification have to be in normal operating condition, steels and welding materials have to be conformed to the relevant standards, the units skillful welder can operate the units w

32、elding equipment to weld test pieces.5. Welding procedure qualification regulations for butt and fillet welding seam5.1 The butt welding test piece should be adopted when carrying out the butt welding procedure qualification. The qualified butt welding procedure is suitable for the fillet-welding se

33、am. When evaluating the welding procedure of no-pressure fillet welding seam, the fillet welding test pieces can be only adopted. The test pieces shapes are showed in figure 1.a) The plate butt welding test piece b) The pipe butt welding test piece（1）The butt welding test pieces a) The plate fillet

34、welding test piece b)The plate and pipe fillet welding test piece（2）The fillet welding test piecesFigure 1 The test pieces shapes for welding procedure qualification5.1.1 The qualified welding procedure of the plate butt welding test pieces is applicable to the pipe butt welding seam, and vice versa

35、.5.1.2 The qualified welding procedure of the plate and pipe fillet welding test pieces is applicable to the plate fillet-welding seam, and vice versa.5.2 The welding procedure elements are divided into the important factor, additional factor and minor factor.5.2.1 The important factor refers to the

36、 welding procedure factors, which may affect welded joints tensile strength and bend strength.5.2.2 The additional factors refer to the welding procedure factors, which may affect welded joints impact toughness. If the impact test is stipulated, the additional factors have to be added.5.2.3 The mino

37、r factors refer to the welding procedure factors that have no marked influence on the stipulated mechanical properties.5.3 Qualification regulations5.3.1 The welding method5.3.1.1 Re-qualification is indispensable if changing the welding method.5.3.1.2 the important, additional and minor factors of

38、the welding procedure qualification for various kinds of welding methods see table 1.a) When changing any important factor it is necessary to evaluate the welding procedure qualification again.b) When adding or changing any additional factor, the test pieces for additional impacting toughness have t

39、o be tested according to the added or changed additional factors.c) When changing minor factors, re-qualification of the welding procedure qualification is unnecessary, but the welding procedure instruction should be drafted again.5.3.1.3 The same seam can be qualified separately according to each w

40、elding method or welding procedure when it is welded by adopting the two or more welding methods, or by the welding procedure which has different important and additional factors, and it can also be qualified comprehensively by adopting the two or more welding methods, welding procedures and welding

41、 pieces.When being applied to the weldment after comprehensive qualification qualification, one or more welding methods, welding procedure can be adopted, but their important and additional factors should be remained unchanging, according to the relevant regulations for each welding method or weldin

42、g procedure determines the effective range is suitable for weldment thickness.5.3.2 Base metalsThe standard shall class for the base metals classification and groups according to the chemical composition, mechanical properties and welding properties (see table 2).5.3.2.1 Grouping regulationsa) When

43、the important and additional factors remain unchanged, the qualified welding procedure of one grade base metal may be suitable for the other grade base metals in the same group. b) The qualification for the base metals in group VI-2 is suitable for the base metals in group II-1. c) In the same class

44、ification number, the qualification for base metals with higher group number is suitable for the welded joints made of the base metals in this group and the base metals with lower group number.d) Apart from the circumferences that is regulated in b) and c), if there is change in base metals group nu

45、mber, there have to have a re-qualification.5.3.2.2 Classification qualification regulationsFor welded joints made from base metals with different classification, even if each base metal has been qualified, re-qualification for the welded joints is necessary. But the qualification of the II classifi

46、cation (or VI-1,VI-2 group) base metal with the same steel grade is suitable for the welded joints from the same classification(or the same group) base metal and the I classification base metal.5.3.2.3 Qualification regulations of the steel grades not including in table 2a) The grade of steel included in National Standards or Industrial Standards should be classified into their corresponding classifications and groups or into new classifications and groups according to their chemical compositi