{"operation":"document","citation":"PI-79-035","title":"David Dolgoy — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1979-10-12","effective_on":null,"summary":"PI-79-035 concerning 192.611.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-79-035.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-79-035.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-79-035","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1979/PI79035.pdf","body":"<<<PAGE 1>>>\n\nMr. David Dolgoy\n10625 Jasper Avenue\nR 521, Corona Hotel\nEdmonton, Alberta\nCanada T5J1Z8\nDear Mr. Dolgoy:\nThis responds to your letter of September 3, 1979, concerning the intent of the term \"hoop stress\"\nas used in 49 CFR §192.611 Hoop stress. In your letter, you correctly assume that \"hoop stress\"\nis the actual stress produced by a given internal gas or liquid pressure in a pipeline and would be\ncalculated using \"Barlows\" formula. This calculation would not involve the use of the de-rating\nfactors specified in §192.105 Design formula for steel pipe.\nThank you for your interest in Pipeline Safety.\nSincerely,\n/signed/\nCesar De Leon\nAssociate Director for\nPipeline Safety Regulation\nMaterials Transportation Bureau\nDB\nC:\\WP51\\INTERPRT\\192\\611\\79-10-12\n1","truncated":false,"body_characters":774}