Section 296-307-44005 - Valves and accessories(1) A filling connection on the container must be fitted with one of the following: (a) A combination back-pressure check and excess flow valve.(b) One double or two single back-pressure valves.(c) A positive shut-off valve, in conjunction with either: (i) An internal back-pressure valve; or(ii) An internal excess flow valve. Instead of an excess flow valve, filling connections may be fitted with a quick-closing internal valve that only opens during operating periods. The mechanism for such valves may have a secondary control that will close automatically in case of fire. The melting point for a fusible plug must be a maximum of 220°F.
(2) A filling pipe inlet terminal off the container must have a positive shut-off valve and either: (a) A back pressure check valve; or(b) An excess flow check valve.(3) All openings in the container must have approved Exceptions: | (a)Filling connections; (b)Safety-relief connections; (c)Liquid-level gauging devices; and (d)Pressure gauge connections. |
(4) All container inlets and outlets must be labeled to designate whether they connect with vapor or liquid (labels may be on valves). Exceptions: | (a)Safety-relief valves; (b)Liquid-level gauging devices; and (c)Pressure gauges. |
(5) Each storage container must have a suitable pressure gauge.Wash. Admin. Code § 296-307-44005
Amended by WSR 20-21-091, Filed 10/20/2020, effective 11/20/202097-09-013, recodified as § 296-307-44005, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW 49.17.040,[49.17.]050 and [49.17.]060. 96-22-048, § 296-306A-44005, filed 10/31/96, effective 12/1/96.