{"operation":"document","citation":"PI-91-037","title":"State of Minnesota Department of Public Safety — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1991-12-24","effective_on":null,"summary":"PI-91-037 response to State of Minnesota Department of Public Safety concerning 192.375.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-91-037.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-91-037.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-91-037","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1991/PI91037.pdf","body":"<<<PAGE 1>>>\n\nMr. Walter T. Kelly\nDirector, Office of Pipeline Safety\nState of Minnesota\nDepartment of Public Safety\n175 Aurora Avenue\nSt. Paul, MN 55013-2356\nDear Mr. Kelly:\nThis responds to your letter of August 25, requesting our opinion whether .049 square inches of\nexposed polyethylene pipe are acceptable under 49 CFR §192.375(a). You said the ,049 square\ninches of exposed polyethylene pipe are exposed to ultraviolet rays through a vent hole on a\nservice riser.\nSection 192.375(a) requires that all plastic service lines transporting gas above ground, outside a\nbuilding, be protected against deterioration and external damage. Ultraviolet rays are known to\ndeteriorate polyethylene pipe; so no exposure of polyethylene pipe to ultraviolet rays is permitted\nunder §192.375(a).\nWe trust this adequately responds to your inquiry.\nSincerely,\nCesar DeLeon\nDirector for Pipeline Safety\nRegulatory Programs\nDB\nC:\\WP51]INTERPRT\\192\\375\\91-12-24\n1","truncated":false,"body_characters":948}