HAR 6-77-171 Purging of pipelines

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#