255.736 Compressor stations: gas detection.

(a)Each compressor building in a compressor station must have a fixed gas detection and alarm system, unless the building is:#

(1)constructed so that at least 50 percent of its upright side area is permanently open; or#

(2)located in an unattended field compressor station of 1,000 horsepower (746 kW) or less.#

(b)Except where shutdown of the system is necessary for maintenance under subdivision (c) of this section, each gas detection and alarm system required by this section must:#

(1)continuously monitor the compressor building for a concentration of gas in air of not more than 25 percent of the lower explosive limit; and#

(2)if that concentration of gas is detected, warn persons about to enter the building and persons inside the building of the danger.#

(c)Each gas detection and alarm system required by this section must be maintained to function properly. The maintenance must include performance tests.#