{"operation":"document","citation":"PI-81-0103","title":"Pipeline Safety Interpretation PI-81-0103","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1981-04-24","effective_on":null,"summary":"PI-81-0103 concerning 195.406.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-81-0103.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-81-0103.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-81-0103","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1981/g81-04-24_Gute_195.406-nlmx.pdf","body":"<<<PAGE 1>>>\n\nPI-81-0103\nThe American Society of Mechanical Engineers\nUnited Engineering Center\n345 E. 47th St.\nNew York, N.Y. 10017\nApril 24, 1981\nMr. William Gute\nPetroleum Engineer\nPipeline Safety Enforcement Division\nOffice of Operations & Enforcement\nMaterials Transportation Bureau\nDept. of Transportation\nResearch and Special Program Admin.\nSUBJECT: Inquiry 1453\nDear Mr. Gute:\nReference is made to your inquiry letter of February 5, 1980.\nOur understanding of the question in your inquiry and our reply are as follows:\n1. QUESTION:\nWhat are the definitions of \"designer\",”special or unusual problem\", and \"rigorous analysis\" as\nmentioned in Paragraph 400 (e) of ANSI/ASME B31.4.\nREPLY:\nDesigner. The responsible person who, by the use of his knowledge, training, expertise, and\nexperience, applies accepted engineering practice and criteria to arrive at the specific physical\ncombination of pipe, fittings, structures, and materials meeting the requirements of this Code.\nSpecial or Unusual Problem. A problem relating to the general subject of this Code, but not specifically\ncovered by procedures or limitations detailed therein.\nRigorous Analysis. A comprehensive and detailed investigation and/or assessment of a subject where\nspecific rules are not given in the Code, or as a substitute for the simplified engineering approach\nusually presented in the Code. When used, the designer is responsible for demonstrating the validity\nof his approach.\n2. QUESTION:\nIs it the intent of Section 400 (e) of the B31.4 Code to allow pipeline operators to exceed flange or\nvalve designer/ manufacturer's maximum working pressure based on the operators own testing or\ncalculations?\nREPLY:\nANSI/ASME B31.4 clearly states that when a designer/operator exceeds or deviates from the\nrequirements of the Code, based on a rigorous analysis, he alone is responsible for demonstrating the\nvalidity of his approach.\nI trust the above comments have adequately answered your questions, and I shall consider the matter closed\nunless I hear from you to the contrary.\nSincerely,\nJerry D’Acanzo\nSecretary, B31","truncated":false,"body_characters":2093}