{"operation":"document","citation":"PI-92-060","title":"Memo: Internal — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1992-11-03","effective_on":null,"summary":"PI-92-060 response to Memo: Internal concerning 192.227.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-92-060.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-92-060.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-92-060","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1992/PI92060.pdf","body":"<<<PAGE 1>>>\n\nMEMORANDUM\nDATE: November 3, 1992\nSUBJ: INFORMATION: Welding Requirements\nFROM: Cesar De Leon\nDirector, Pipeline Safety Regulatory Programs, DPS-10\nTO: Richard Sanders\nManager, Pipeline Safety Division, DTI-60\nThis responds to your memo of August 25, 1992, asking if Part 192 permits a gas\npipeline to be uprated above 20% of SMYS when it was welded in accordance\nwith Appendix C of Part 192. You also asked if a pipeline on which none of the\ngirth welds was nondestructively tested may be uprated above 20% of SMYS.\nSection 192.227 establishes Appendix C as an alternative method of welder\nqualification. Welders who qualify under Appendix C and not under API 1104 or\nthe Boiler and Pressure Vessel Code may not weld on steel pipelines to be\noperated at 20% or more of SMYS. Hence, a low stress level steel pipeline whose\nwelders were qualified only under Appendix C may not be operated at 20% of\nmore of SMYS. Because of this limitation on operating pressure, it follows that\nsuch a pipeline may not be uprated to 20% or more of SMYS.\nSection 192.241(b) provides that certain welds or percentages of welds on steel\npipelines to be operated at 20% or more of SMYS must be nondestructively\ntested, unless the welds are visually inspected, approved by a qualified welding\ninspector, and the pipeline (1) is less than 6 inches in nominal diameter; or (2) is to\nbe operated at less than 40% of SMYS and certain conditions are satisfied. Hence,\na low stress level steel pipeline whose welds were subject to §192.241 but were\nnot nondestructively tested may not be operated at 20% or more of SMYS unless\nthe welds were excepted from nondestructive testing under §192.241(b).\nFurthermore, this limitation on operating pressure precludes uprating to 20% or\nmore of SMYS unless the welds were excepted from nondestructive testing. If the\nwelds were excepted but the pipeline is 6 inches or more in nominal diameter,\noperation and uprating would be limited to a pressure of less than 40% of SMYS.\ndal\\192\\227\\92-11-03\n1\n\n<<<PAGE 2>>>\n\nBecause of §192.553(d), the uprating of a steel pipeline whose welds were not\nsubject to §192.241 and were not nondestructively tested would still be affected by\n§192.241(b). Section 192.553(d) limits uprating to the maximum pressure Part\n192 would allow if the pipeline were new, unless the line is grand-\nfathered under §192.555(c). So, unless §192.555(c) applies, a pipeline whose\nwelds were not nondestruc-\ntively tested may not be uprated above the operating pressure limitations of\n§192.241(b), because these limits apply to the uprating of new pipelines. If\n§192.55(c) applies, the lack of nondestructive testing would not affect uprating to\nthe level permitted by §192.555(c).\n#\ndal\\192\\227\\92-11-03\n2","truncated":false,"body_characters":2749}