1、 National Aeronautics and Space Administration John C. Stennis Space Center Stennis Space Center, MS 39529-6000 SSTD-8070-0014-WELD Rev. A January 2010 John C. Stennis Space Center STANDARD FOR QUALIFYING WELDERS AND WELDING PROCEDURES Original signed by Randall R. Canady_ 01/14/10 NASA SSC Center O
2、perations Directorate Date Design validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Stennis Standard SSTD-8070-0014-WELD A Number Rev. Effective Date: January 19, 2010 Review Date: January 19, 2015 Page 2 of 10 Responsible Offic
3、e: NASA Center Operations Directorate SUBJECT: Standard for Qualifying Welders and Welding Procedures Document History Log Revision Date Originator/Phone Description Basic 10/5/04 R. Nyberg/ 8-1502 Initial Release supersedes SSC-34-006 Rev. K with the following changes: New document number and forma
4、t per SPG 1400.1. Added/specified sections per SPG 1400.1 where appropriate throughout the document. In Retests section, deleted sentence “re-qualification will be allowed on three test assemblies, any one of which passes will re-qualify without retest penalty.” In 3.0 added references to SSC Standa
5、rds. In Criteria for Welder section, specified that records of qualifications shall be retained in the individuals personnel certification file in the FOS Contractors S validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Stennis S
6、tandard SSTD-8070-0014-WELD A Number Rev. Effective Date: January 19, 2010 Review Date: January 19, 2015 Page 3 of 10 Responsible Office: NASA Center Operations Directorate SUBJECT: Standard for Qualifying Welders and Welding Procedures STP-8810-0013, and SSTP-8810-0028. Section 6.2.1d: Added how nu
7、mber is determined. Section 6.2.1.3: Changed reference for bend tests from QW-161.3 to QW-160. Section 7.0c.1 Updated immediate retest. Section 8.3: Qualification updated. Section 8.4: deleted NOTE 1: For tests in the 3G and 4G positions (plate), mechanical testing or radiographic testing shall be p
8、er AWS Dl.l or ASME Section IX. NOTE 2: For tests made on pipe in the 2G and 5G or in the 6G position, mechanical testing or radiographic testing shall be per ASME Section IX. NOTE 3: For T-l steel, two (2) tensile specimens shall be taken from each test assembly welded, in addition to the other qua
9、lification tests. NOTE 4: When a welder is to be qualified to weld on stainless steel (P-8 base material), carbon steel plates or pipes of P-1 material may be substituted for the performance test and welded with austenitic electrodes (A-8 or A-9 of table QW-442 ASME Section IX). NOTE 5: When a welde
10、r is required to weld on material of lesser or greater thickness, the welder and welding procedure must be re-qualified per the applicable code. RELEASED - Printed documents may be obsolete; validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking permitted without license
11、from IHS-,-,-Stennis Standard SSTD-8070-0014-WELD A Number Rev. Effective Date: January 19, 2010 Review Date: January 19, 2015 Page 4 of 10 Responsible Office: NASA Center Operations Directorate SUBJECT: Standard for Qualifying Welders and Welding Procedures Table of Contents 1.0 PURPOSE AND APPLICA
12、BILITY . 5 2.0 REFERENCES 5 3.0 RESPONSIBILITIES . 5 4.0 CRITERIA FOR WELDER 5 5.0 VISION TEST . 6 6.0 WELDING AND INSPECTION OF OPERATOR CERTIFICATION TEST ASSEMBLIES 6 6.1 Welding Requirements 6 6.2 Testing and Inspection of Assemblies 7 6.2.1 Inspection 7 6.2.2 Welder Qualification Testing 8 7.0
13、RETESTS 8 8.0 WELDING PROCEDURE QUALIFICATION 9 8.1 General 9 8.2 Pressure Vessels (Pipe and Other Pressure Containing Vessels) 9 8.3 Structural Steel (Plate, Pipe, and Box Tubes) . 9 8.4 Repair 9 9.0 RECORDS AND FORMS 10 10.0 ACRONYMS AND ABBREVIATIONS . 10 RELEASED - Printed documents may be obsol
14、ete; validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Stennis Standard SSTD-8070-0014-WELD A Number Rev. Effective Date: January 19, 2010 Review Date: January 19, 2015 Page 5 of 10 Responsible Office: NASA Center Operations Dir
15、ectorate SUBJECT: Standard for Qualifying Welders and Welding Procedures 1.0 PURPOSE AND APPLICABILITY This Standard specifies the methods to be used for qualifying welding procedures and personnel required to perform welding at John C. Stennis Space Center (SSC) and the responsibilities for retenti
16、on of these qualification records. This Standard applies to the Facility Operating Services Contractor (FOSC) and to FOSC subcontractors. Note: Only Weld Wire/Rod qualified per SSC 34-034 will be used for qualification tests. 2.0 REFERENCES All references are assumed to be the latest version unless
17、otherwise indicated. ASME Boiler and Pressure Vessel Code, Section IX, Qualification Standard for Welding and Brazing Procedures, Welder, Brazers and Welding and Brazing Operators ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, Pressure Vessels AWS D1.1, Structural Welding Code - Ste
18、el SPR 1400.1, Document Preparation, Numbering, and Management SPR 1440.1, Records Management Program Requirements SSC 34-004, Classes of Welding Inspection SSC 34-034, SSC Standard for Certified Weld Wire/Rod SSTD 8070-0005-CONFIG, Preparation, Review, Approval and Release of SSC Standards STP-8810
19、-0013, John C. Stennis Space Center Technical Procedure for Methods, Procedures and Qualifications In The Use of Liquid Penetrants (Visible Dye/Fluorescent Dye) STP-8810-0012, John C. Stennis Space Center Technical Procedure for Magnetic Particle Examination Dry Powder Method STP-8810-0028, John C.
20、Stennis Space Center Test Procedure for Visual Examination 3.0 RESPONSIBILITIES Responsibilities for use and control of this Standard and for the review and approval of revisions or cancellation of this standard shall be as specified in SSTD-8070-0005-CONFIG and the applicable documents referenced h
21、erein. 4.0 CRITERIA FOR WELDER a. Trained, experienced, professional welders whose work scope includes welding shall be certified by meeting the following requirements: RELEASED - Printed documents may be obsolete; validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking pe
22、rmitted without license from IHS-,-,-Stennis Standard SSTD-8070-0014-WELD A Number Rev. Effective Date: January 19, 2010 Review Date: January 19, 2015 Page 6 of 10 Responsible Office: NASA Center Operations Directorate SUBJECT: Standard for Qualifying Welders and Welding Procedures 1. The welder sha
23、ll qualify as prescribed by ASME Section IX. If ASME Section IX qualification is achieved, the welder will also be qualified in accordance with AWS D1.1 (excluding 6GR position). 2. For welding that requires Class I, II, III or IV inspection (see SSC 34-004), the we1der shall be required to weld acc
24、eptable test assemblies as specified in this procedure. 3. The welder shall be required to pass the vision test specified below. b. Records of qualifications shall be retained in the individuals personnel certification file in the FOSCs Safety validate prior to use. Provided by IHS Not for ResaleNo
25、reproduction or networking permitted without license from IHS-,-,-Stennis Standard SSTD-8070-0014-WELD A Number Rev. Effective Date: January 19, 2010 Review Date: January 19, 2015 Page 7 of 10 Responsible Office: NASA Center Operations Directorate SUBJECT: Standard for Qualifying Welders and Welding
26、 Procedures 2. Plate. a. Test assemblies shall be welded in the 3G and 4G positions, which shall qualify the welder for all positions. b. Welders shall be tested to qualify for all positions except when qualifying for one position only, then the test assembly shall be welded in that position. (Refer
27、ence ASME Section IX) 3. Qualification on pipe also qualifies on plate but not vice versa. 4. Welder qualifications may be accomplished by welding coupons (test assemblies) as shown in this procedure or by in process welding of a production weld with inspection per Class I of SSC STD 34-004 which wi
28、ll qualify the welder for that position and thickness range. 5. An in process weld which incurs a reject and requires a repair shall be repaired by qualified welder in accordance with ASME Section IX. b. Repair Welding of Coupons. No qualification test coupon shall be repair welded. Welding defects
29、that are detected by radiography, ultrasonic, magnetic particle, or liquid penetrant will remain in the first coupon, except for instructional purposes. 6.2 Testing and Inspection of Assemblies 6.2.1 Inspection a. A qualified Inspector, per STP-8810-0028, shall witness the qualification test and wil
30、l assure that the test plates are properly prepared, cleaned, fitted, and set up according to the accepted procedure for each qualification test. b. The Inspector shall use dye penetrant inspection for non-magnetic material, per STP-8810-0013, and magnetic particle inspection for ferromagnetic mater
31、ial, per STP-8810-0012, after the root pass on the qualification test or when there is a definite indication of poor weld quality. c. The test may be terminated at any stage of the testing procedure, whenever it becomes apparent to the Inspector conducting the test that the welder does not have the
32、required skill to produce satisfactory results. RELEASED - Printed documents may be obsolete; validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Stennis Standard SSTD-8070-0014-WELD A Number Rev. Effective Date: January 19, 2010
33、Review Date: January 19, 2015 Page 8 of 10 Responsible Office: NASA Center Operations Directorate SUBJECT: Standard for Qualifying Welders and Welding Procedures d. The Inspector shall stamp the test coupon as follows: 1. With a number, assigned sequentially on the process plan by FOSC Quality Assur
34、ance, designating the test. 2. With the welders initials to designate the welder. 3. When the plate or pipe is to be cut into samples for bend testing, each bend test specimen must be marked with the test number and welder designation letter and the type of bend test to be performed (SB = side bend,
35、 FB = face bend, RB = root bend). 4. With the appropriate ASME weld position designation (See ASME Section IX). e. If the test coupons pass the visual inspection, the Inspector will have the specimens tested as defined below. f. The welders Supervisor shall keep a record of all qualification welding
36、 performed by welders/welding operators. 6.2.2 Welder Qualification Testing 6.2.2.1 General. A welder may be qualified by radiography of a test assembly or by bend tests taken from a test assembly. 6.2.2.2 Radiographic Examination. Weld qualification test assemblies tested by radiography shall be x-
37、rayed 100 percent and shall conform to paragraph UW51 of ASME, Section VIII, Division 1. 6.2.2.3 Mechanical Testing. Weld qualification test assemblies tested by bend test shall meet the requirements of paragraph QW-160 of ASME Section IX. 7.0 RETESTS a. Renewal of qualification is required for the
38、following reasons: 1. When there is a specific reason to question a welders ability to make welds that meet the requirements. 2. After a period of 6 months during which a demonstration of proficiency has not been performed. RELEASED - Printed documents may be obsolete; validate prior to use. Provide
39、d by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Stennis Standard SSTD-8070-0014-WELD A Number Rev. Effective Date: January 19, 2010 Review Date: January 19, 2015 Page 9 of 10 Responsible Office: NASA Center Operations Directorate SUBJECT: Standard for Qual
40、ifying Welders and Welding Procedures b. If the above proficiency demonstration has not been performed for 6 months because the specific procedure has been inactive, it will not be necessary to re-qualify until that particular repair weld/production weld procedure is made active. c. If a qualificati
41、on test assembly is rejected for other reason(s), retesting shall be as follows: 1. Immediate Retest: The welder shall successfully weld two test assemblies for each one that was rejected. 2. Retest Following Training: The welder may be allowed to weld one test assembly provided additional training
42、has been received between the time the unacceptable assembly was made and the time allowed to weld retest assemblies for certification. 8.0 WELDING PROCEDURE QUALIFICATION 8.1 General a. An ASME welding procedure qualification test may be welded in any position and qualifies the procedure for all po
43、sitions. The welder making and passing the procedure qualification test is thereby qualified for the position tested. b. Records (WPS/PQRs) of procedure qualification shall be provided by Quality Assurance to Central Engineering Files (CEF) for each welding procedure. c. Procedure qualifications sha
44、ll be available to those authorized to examine them. 8.2 Pressure Vessels (Pipe and Other Pressure Containing Vessels) Welding procedures shall be qualified per ASME Section IX. 8.3 Structural Steel (Plate, Pipe, and Box Tubes) Welding procedures shall be qualified per AWS D1.1 (See AWS D1.1 Table 4
45、.1). 8.4 Repair Weld procedures allow repair of welds by following the same procedure. This will only be attempted once and should the weld still not pass inspection, Material Review Board (MRB) action is required. Under no circumstances will any one weld receive more than three (3) total repairs wi
46、thout MRB action. RELEASED - Printed documents may be obsolete; validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Stennis Standard SSTD-8070-0014-WELD A Number Rev. Effective Date: January 19, 2010 Review Date: January 19, 2015
47、Page 10 of 10 Responsible Office: NASA Center Operations Directorate SUBJECT: Standard for Qualifying Welders and Welding Procedures 9.0 RECORDS AND FORMS Records and forms required by the procedures of this standard shall be maintained in accordance with SPR 1440.1. For quality records refer to the SSC Master Records Index. All forms are assumed to be the latest edition unless otherwise specified and may be obtained from the SSC Electronic Forms repository or from the NASA SSC Forms Management Officer. 10.0 ACRONYMS AND ABBREVIATIONS ASME American Society of Mechanical
