1、 National Aeronautics and Space Administration John C. Stennis Space Center Stennis Space Center, MS 39529-6000 SSTD-8070-0013-WELD Rev. Basic September 2010 John C. Stennis Space Center CLASSES OF WELDING INSPECTION Original signed by Randall Canady_ 09/29/10 NASA SSC Center Operations Directorate
2、Date Design validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Stennis Standard SSTD-8070-0013-WELD Basic Number Rev. Effective Date: September 28, 2010 Review Date: September 28, 2015, Page 2 of 25 Responsible Office: NASA SSC C
3、enter Operations Directorate SUBJECT: Classes Of Welding Inspection Document History Log Status/ Change/ Revision Change Date Originator/ Phone Description Basic 09.28.10 Doug Dike/2803 Initial release, supersedes SSC STD 34-004. RELEASED - Printed documents may be obsolete; validate prior to use. P
4、rovided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Stennis Standard SSTD-8070-0013-WELD Basic Number Rev. Effective Date: September 28, 2010 Review Date: September 28, 2015, Page 3 of 25 Responsible Office: NASA SSC Center Operations Directorate SUBJECT
5、 Classes Of Welding Inspection Table of Contents 1.0 PURPOSE 4 2.0 APPLICABILITY . 4 3.0 REFERENCES 4 4.0 RESPONSIBILITIES . 4 5.0 GENERAL . 5 6.0 CLASS I WELD INSPECTION 5 6.1 Newly Constructed Pressure Vessels . 5 6.2 In-Service Code Stamped Pressure Vessels 6 6.3 In-Service Non-Code Stamped Pres
6、sure Vessels 7 6.4 Newly Constructed Piping/Pressure Systems . 8 6.5 In-Service Piping/Pressure Systems 9 6.6 Repairs . 10 7.0 CLASS II WELD INSPECTION . 11 7.1 Newly Constructed Pressure Vessels . 11 7.2 In-Service Code Stamped Pressure Vessels 12 7.3 In-Service Non-Code Stamped Pressure Vessels 13
7、 7.4 Newly Constructed Piping/Pressure Systems . 14 7.5 In-Service Piping/Pressure Systems 15 7.6 Repairs . 16 8.0 CLASS IIA WELD INSPECTION 17 8.1 Newly Constructed Piping/Pressure Systems . 17 8.2 Repairs . 18 9.0 CLASS III WELD INSPECTION . 18 9.1 Newly Constructed Pressure Vessels . 18 9.2 In-Se
8、rvice Code Stamped Pressure Vessels 19 9.3 In-Service Non-Code Stamped Pressure Vessels 20 9.4 Newly Constructed Piping/Pressure Systems . 21 9.5 In-Service Piping/Pressure Systems 22 9.6 Repairs . 22 10.0 CLASS IV WELD INSPECTION . 23 11.0 CLASS V WELD INSPECTION . 24 12.0 GENERAL INSPECTION . 24 1
9、3.0 ATTACHMENT WELDS 25 14.0 REPAIR OF WELD DEFECTS 25 15.0 RECORDS AND FORMS 25 16.0 ACRONYMS AND ABBREVIATIONS . 25 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 Standa
10、rd SSTD-8070-0013-WELD Basic Number Rev. Effective Date: September 28, 2010 Review Date: September 28, 2015, Page 4 of 25 Responsible Office: NASA SSC Center Operations Directorate SUBJECT: Classes Of Welding Inspection 1.0 PURPOSE This John C. Stennis Space Center (SSC) standard (SSTD) sets forth t
11、he criteria for each class of inspection required for welding at SSC. 2.0 APPLICABILITY This SSTD applies to contractors and/or subcontractors involved with welding at SSC. 3.0 REFERENCES a. All references are assumed the latest version unless otherwise indicated. ANSI/ASNT CP-105, Training Outlines
12、 for Qualification of Nondestructive Personnel ASME Boiler validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Stennis Standard SSTD-8070-0013-WELD Basic Number Rev. Effective Date: September 28, 2010 Review Date: September 28, 20
13、15, Page 5 of 25 Responsible Office: NASA SSC Center Operations Directorate SUBJECT: Classes Of Welding Inspection 5.0 GENERAL a. Only Weld Wire/Rod qualified per SSTD-8070-0033-WELD shall be used. Class of welding inspection is a requirement specified on drawings or other documents. b. The class of
14、 inspection shall be as delineated by this SSC standard (SSTD). Welding requiring Classes I, II, IIA, III, or IV inspection require certified procedures and certified welders. c. The welding setup for qualifying a welding procedure shall be inspected to assure that material, fit-up tolerances, surfa
15、ce preparation and joint tooling comply with the requirements of the written welding standards. d. Classes I, II, IIA and III are applicable to pressure retaining welds and welds to pressure retaining boundaries. e. Class IIA is applicable to welding, alterations, or repairs of pressure piping. f. C
16、lasses IV and V are not applicable to pressure retaining welds. g. Class V shall be used only when no other class of welding inspection applies. h. Throughout this SSTD, the “code of construction” shall be considered the governing standard or specification for the construction, fabrication, manufact
17、ure or repair project. 6.0 CLASS I WELD INSPECTION 6.1 Newly Constructed Pressure Vessels a. Visual Inspection 1. All welding shall be one hundred (100) percent visually inspected. 2. The acceptance criteria shall be per the edition and addenda of the ASME Boiler and Pressure Vessel Code (BPVC) used
18、 in the construction of the pressure vessel. 3. The welds shall be full, smooth and well profiled. 4. The welds shall be free from flux, salt bath residue, weld spatter and other contaminates. 5. Visual examination shall, at a minimum, meet the requirements specified in the code of construction and
19、ASME BPVC Sect. V, article 9. 6. Incomplete fusion, incomplete penetration or surface cracks shall be cause for rejection. 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 S
20、tandard SSTD-8070-0013-WELD Basic Number Rev. Effective Date: September 28, 2010 Review Date: September 28, 2015, Page 6 of 25 Responsible Office: NASA SSC Center Operations Directorate SUBJECT: Classes Of Welding Inspection b. Radiographic Testing 1. One hundred (100) percent radiographic examinati
21、on shall be performed on all full penetration welds. 2. The acceptance criteria shall be per the edition and addenda of the ASME BPVC used in the construction of the pressure vessel. 3. Radiography shall at a minimum meet the requirements specified in the code of construction, ASME BPVC Sect. V, art
22、icle 2 and state and local jurisdictional requirements. 4. Alternative examinations in lieu of radiographic examination shall be performed as specified in the code of construction. 5. Alternative examinations in lieu of radiographic examination shall be approved by the authorized inspector. 6. Incom
23、plete fusion, incomplete penetration or surface cracks shall be cause for rejection. c. Magnetic Particle or Dye Penetrant Testing 1. Magnetic particle or dye penetrant examination shall be performed on the root and final pass of all welds which cannot be radiographed, such as socket, fillet and par
24、tial penetration welds. 2. The acceptance criteria shall be per the edition and addenda of the ASME BPVC used in the construction of the pressure vessel. 3. Magnetic particle examination shall, at a minimum, meet the requirements specified in the code of construction and ASME BPVC Sect. V, article 7
25、 4. Magnetic particle examination shall be used only on ferro-magnetic materials. 5. Dye penetrant examination shall, at a minimum, meet the requirements specified in the code of construction and ASME BPVC Sect. V, article 6. 6. Incomplete fusion, incomplete penetration or surface cracks shall be c
26、ause for rejection. 6.2 In-Service Code Stamped Pressure Vessels a. Visual Inspection 1. All welding shall be one hundred (100) percent visually inspected. 2. The acceptance criteria shall be per the most recent edition and addenda of the National Board Inspection Code, NB-23. 3. The welds shall be
27、full, smooth and well profiled. 4. The welds shall be free from flux, salt bath residue, weld spatter and other contaminates. 5. Visual examination shall, at a minimum, meet the requirements specified in the inspection code and ASME BPVC Sect. V, article 9. 6. Incomplete fusion, incomplete penetrati
28、on or surface cracks shall be cause for rejection. 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-8070-0013-WELD Basic Number Rev. Effective Date: September
29、28, 2010 Review Date: September 28, 2015, Page 7 of 25 Responsible Office: NASA SSC Center Operations Directorate SUBJECT: Classes Of Welding Inspection b. Radiographic Testing 1. One hundred (100) percent radiographic examination shall be performed on all full penetration welds. 2. The acceptance c
30、riteria shall be per the most recent edition and addenda of the National Board Inspection Code, NB-23. 3. Radiography shall at a minimum meet the requirements specified in the inspection code, ASME BPVC Sect. V, article 2 and state and local jurisdictional requirements. 4. Alternative examinations i
31、n lieu of radiographic examination shall be approved by the authorized inspector. 5. Incomplete fusion, incomplete penetration or surface cracks shall be cause for rejection. c. Magnetic Particle or Dye Penetrant Testing 1. Magnetic particle or dye penetrant examination shall be performed on the roo
32、t and final pass of all welds which cannot be radiographed, such as socket, fillet and partial penetration welds. 2. The acceptance criteria shall be per the most recent edition and addenda of the National Board Inspection Code, NB-23. 3. Magnetic particle examination shall, at a minimum, meet the r
33、equirements specified in the inspection code and ASME BPVC Sect. V, article 7. 4. Magnetic particle examination shall be used only on ferro-magnetic materials. 5. Dye penetrant examination shall, at a minimum, meet the requirements specified in the inspection code and ASME BPVC Sect. V, article 6. 6
34、 Incomplete fusion, incomplete penetration or surface cracks shall be cause for rejection. 6.3 In-Service Non-Code Stamped Pressure Vessels a. Visual Inspection 1. All welding shall be one hundred (100) percent visually inspected. 2. The acceptance criteria shall be per the most recent edition and
35、addenda of the API-510 Pressure Vessel Inspection Code. 3. The welds shall be full, smooth and well profiled. 4. The welds shall be free from flux, salt bath residue, weld spatter and other contaminates. 5. Visual examination shall, at a minimum, meet the requirements specified in the inspection cod
36、e and ASME BPVC Sect. V, article 9. 6. Incomplete fusion, incomplete penetration or surface cracks shall be cause for rejection. RELEASED - Printed documents may be obsolete; validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Ste
37、nnis Standard SSTD-8070-0013-WELD Basic Number Rev. Effective Date: September 28, 2010 Review Date: September 28, 2015, Page 8 of 25 Responsible Office: NASA SSC Center Operations Directorate SUBJECT: Classes Of Welding Inspection b. Radiographic Testing 1. One hundred (100) percent radiographic exa
38、mination shall be performed on all full penetration welds. 2. The acceptance criteria shall be per the most recent edition and addenda of API-510. 3. Radiography shall, at a minimum, meet the requirements specified in the inspection code, ASME BPVC Sect. V, article 2 and state and local jurisdiction
39、al requirements. 4. Alternative examinations in lieu of radiographic examination shall be approved by the authorized inspector. 5. Incomplete fusion, incomplete penetration or surface cracks shall be cause for rejection. c. Magnetic Particle or Dye Penetrant Testing 1. Magnetic particle or dye penet
40、rant examination shall be performed on the root and final pass of all welds which cannot be radiographed, such as socket, fillet and partial penetration welds. 2. The acceptance criteria shall be per the most recent edition and addenda of API-510. 3. Magnetic particle examination shall, at a minimum
41、 meet the requirements specified in the inspection code and ASME BPVC Sect. V, article 7. 4. Magnetic particle examination shall be used only on ferro-magnetic materials. 5. Dye penetrant examination shall, at a minimum, meet the requirements specified in the inspection code and ASME BPVC Sect. V,
42、article 6. 6. Incomplete fusion, incomplete penetration or surface cracks shall be cause for rejection. 6.4 Newly Constructed Piping/Pressure Systems a. Visual Inspection 1. All welding shall be one hundred (100) percent visually inspected. 2. The acceptance criteria shall be per the edition and add
43、enda of the applicable ASME B31 piping code used in the construction of the pressure system. 3. The welds shall be full, smooth and well profiled. 4. The welds shall be free from flux, salt bath residue, weld spatter and other contaminates. 5. Visual examination shall, at a minimum, meet the require
44、ments specified in the code of construction and ASME BPVC Sect. V, article 9. 6. Incomplete fusion, incomplete penetration or surface cracks shall be cause for rejection. RELEASED - Printed documents may be obsolete; validate prior to use. Provided by IHS Not for ResaleNo reproduction or networking
45、permitted without license from IHS-,-,-Stennis Standard SSTD-8070-0013-WELD Basic Number Rev. Effective Date: September 28, 2010 Review Date: September 28, 2015, Page 9 of 25 Responsible Office: NASA SSC Center Operations Directorate SUBJECT: Classes Of Welding Inspection b. Radiographic Testing 1.
46、One hundred (100) percent radiographic examination shall be performed on all full penetration welds. 2. The acceptance criteria shall be per the edition and addenda of the applicable ASME B31 piping code used in the construction of the pressure system. 3. Radiography shall, at a minimum, meet the re
47、quirements specified in the code of construction, ASME BPVC Sect. V, article 2 and state and local jurisdictional requirements. 4. Alternative examinations in lieu of radiographic examination shall be performed as specified in the code of construction. 5. Alternative examinations in lieu of radiogra
48、phic examination shall be approved by the authorized inspector. 6. Incomplete fusion, incomplete penetration or surface cracks shall be cause for rejection. c. Magnetic Particle or Dye Penetrant Testing 1. Magnetic particle or dye penetrant examination shall be performed on the root and final pass of all welds which cannot be radiographed, such as socket, fillet and par
