{"operation":"document","citation":"HAR 6-77-171","title":"HAR 6-77-171 Purging of pipelines","source_type":"regulation","agency":"Hawaii Public Utilities Commission","status":"current","official":true,"published_on":"1994-04-15","effective_on":"1994-09-03","summary":"gas, the gas must be released into one end of the line in a moderately rapid and continuous flow. If gas cannot be supplied in sufficient quantity to prevent the formation of a hazardous mixture of gas and air, a slug of inert gas must be released into the line before the gas. (b) When a pipeline is","machine_formats":{"json":"https://regulus.evalyn.ai/document/hi-har-har-6-77-171.json","markdown":"https://regulus.evalyn.ai/document/hi-har-har-6-77-171.md"},"app_url":"https://regulus.evalyn.ai/document/hi-har-har-6-77-171","source_url":"https://puc.hawaii.gov/wp-content/uploads/2026/04/HAR-6-77-Transp-of-Gas-03-31-2026.pdf","body":"gas, the gas must be released into one end of the line in a moderately rapid and continuous flow. If gas cannot be supplied in sufficient quantity to prevent the formation of a hazardous mixture of gas and air, a slug of inert gas must be released into the line before the gas. (b) When a pipeline is being purged of gas by use of air, the air must be released into one end of the line in a moderately rapid and continuous flow. If air cannot be supplied in sufficient quantity to prevent the formation of a hazardous mixture of gas and air, a slug of inert gas must be released into the line before the air. [Eff ] (Auth: HRS '269-6) (Imp: 49 C.F.R. '192.629, October 1, 1990) Subchapter 15 Maintenance","truncated":false,"body_characters":703}