Section 296-307-44005. What requirements apply to 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 excess flow check valves.

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.

[WSR 97-09-013, 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. WSR 96-22-048, § 296-306A-44005, filed 10/31/96, effective 12/1/96.]

WSR 97-09-013, 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. WSR 96-22-048, § 296-306A-44005, filed 10/31/96, effective 12/1/96.