(ew) Fittings in copper piping. Fittings in copper piping and exposed to the soil, such as service tees and pressure control fittings, shall be made of bronze, copper or brass.

(bw) All compressor station buildings shall be constructed of non-combustible materials.

(cw) Exits shall be provided in compliance with the requirements of the Wisconsin Commercial Building Code, chs. SPS 361 to 366. Ladders shall not be used for exits.

(ew) All electrical equipment and wiring installed in gas transmission and distribution compressor stations shall conform to the requirements of the state electrical code, chs. SPS 316 and PSC 114.

PSC 135.163 HistoryHistory: Cr. Register, October, 1999, No. 526, eff. 11-1-99; correction in (2) made under s. 13.93 (2m) (b) 7., Stats., Register February 2004, No. 578; correction in (2) made under s. 13.93 (2m) (b) 7., Stats., Register April 2007 No. 616; correction in (2) and (3) made under s. 13.92 (4) (b) 7., Stats., Register December 2012 No. 684; CR 21-049: am. (1) Register March 2022 No. 795, eff. 4-1-22.

PSC 135.171PSC 135.171 Compressor stations: additional safety equipment addition [49 CFR 192.171]. After 49 CFR 192.171(a), insert:

(aw) Fire protection. Fire-protection facilities shall be provided as specifically directed by the department of safety and professional services and the local fire department. The operation of fire-protection facilities, such as pumps, shall not be affected by an emergency shutdown.

PSC 135.171 HistoryHistory: Cr. Register, October, 1999, No. 526, eff. 11-1-99; correction made under s. 13.92 (4) (b) 6., Stats., Register December 2018 No. 756.

PSC 135.173PSC 135.173 Compressor stations: ventilation addition [49 CFR 192.173]. After the text in 49 CFR 192.173, insert:

(1w) There shall be compliance with the state heating, ventilation, and air conditioning code, ch. SPS 364.

PSC 135.173 HistoryHistory: Cr. Register, October, 1999, No. 526, eff. 11-1-99; correction made under s. 13.92 (4) (b) 7., Stats., Register December 2012 No. 684.

(bw) The distance between the valve and the regulator or regulators shall be sufficient to permit the operation of the valve during an emergency such as a large gas leak or a fire in the station. These valves shall be in accessible locations neither closer than 25 feet nor more than 1,500 feet distant from each regulator station.

PSC 135.183PSC 135.183 Vaults: structural design requirements additions [49 CFR 192.183]. After 49 CFR 192.183(c), insert:

(dw) In the design of vaults and pits for pressure limiting, pressure relieving and pressure regulating equipment, the installed equipment shall be protected from damage, such as that resulting from an explosion within the vault or pit, which may cause portions of the roof or cover to fall into the vault.

(ew) Vault or pit openings shall be located so as to minimize the hazards of tools or other objects falling upon the regulator, piping, or other equipment. The control piping and the operating parts of the equipment installed shall not be located under a vault or pit opening where workers can step on them when entering or leaving the vault or pit, unless such parts are suitably protected. Whenever a vault or pit opening is to be located above equipment which could be damaged by a falling cover, a circular cover should be installed or other suitable precautions taken.

PSC 135.187PSC 135.187 Vaults: sealing, venting, and ventilation addition [49 CFR 192.187]. After 49 CFR 192.187(a)(3), insert:

(4w) The outside end of the ducts shall be equipped with a suitable weatherproof fitting or vent-head designed to prevent foreign matter from entering or obstructing the duct. The effective area of the openings in such fittings or vent-heads shall be at least equal to the cross-sectional area of a 4-inch duct. The horizontal section of the ducts shall be as short as practical and shall be pitched to prevent the accumulation of liquids in the line. The number of bends and offsets shall be reduced to a minimum and provisions shall be incorporated to facilitate the periodic cleaning of the ducts.