Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-24 - General safety and health standards › Part F-1 - STORAGE AND HANDLING OF LIQUEFIED PETROLEUM GASES › Section 296-24-47509 - Systems utilizing containers other than DOT containers

Current through Register Vol. 24-14, July 15, 2024
(1)
Application.
This section applies specifically to systems
				utilizing storage containers other than those constructed in accordance with
				DOT specifications. WAC
				296-24-47505 of this section
				applies to this section unless otherwise noted in WAC
				296-24-47505.
(2)
Design pressure and classification
				of storage containers.
You must design and classify containers in
				accordance with Table H-31.
(3)
Container valves and accessories, filler pipes, and discharge
				pipes.
(a) You must not locate the
				filling pipe inlet terminal inside a building. For containers with a water
				capacity of 125 gallons or more, you must locate such terminals not less than
				10 feet from any building (see WAC
				296-24-47505(6)(b)), and preferably not less than 5 feet from any driveway, and you must locate
				them in a protective housing built for the purpose.
TABLE H-31
Minimum design pressures of container lb. per
						  sq. in. gage
Container type
For gases with vapor press. Not to exceed lb. per sq. in.
						  gage at 100°F (37.8°C.)
1949 and earlier editions of ASME Code (Par. U-68 U-69)
1949 edition of Code (Par. U-200, U-201); 1950, 1952, 1956, 1959,
						  1962, 1965, and 1968 (Division I) editions of ASME Code; All editions of
						  API-ASME Code3
801
801
801
1001
100
100
100
125
125
125
125
156
150
150
150
187
175
175
175
219
2002
215
200
250
1 New storage containers of the 80
				  type have not been authorized since Dec. 31, 1947.
2 Container type may be increased
				  by increments of 25. The minimum design pressure of containers must be 100% of
				  the container type designations when constructed under 1949 or earlier editions
				  of the ASME Code (Par. U-68 and U-69). The minimum design pressure of
				  containers must be 125% of the container type designation when constructed
				  under: (1) The 1949 ASME Code (Par. U-200 and U-201), (2) 1950, 1952, 1956,
				  1959, 1962, 1965, and 1968 (Division I) editions of the ASME Code, and (3) all
				  editions of the API-ASME Code.
3 Construction of containers under
				  the API-ASME Code is not authorized after July 1, 1961.
(b)You must fit the filling connection with
				one of the following:
(i) Combination
				back-pressure check valve and excess flow valve.
(ii) One double or two single back-pressure
				check valves.
(iii) A positive
				shut-off valve in conjunction with either:
(A)An internal back pressure valve,
				or
(B)An internal excess flow
				valve.
(c)You
				must equip all openings in a container with approved automatic excess flow
				valves except in the following: Filling connections as provided in (3)(b) of
				this section; safety relief connections, liquid-level gaging devices as
				provided in WAC
				296-24-47505(7)(d), (19)(c) and
				(19)(h); pressure gage connections as
				provided in WAC
				296-24-47505(7)(e),
				as provided in (3)(d), (f) and (g) of this section.
(d) An excess flow valve is not required in
				the withdrawal service line providing the following are complied with:
(i) Such systems' total water capacity does
				not exceed 2,000 U.S. gallons.
(ii)
				The discharge from the service outlet is controlled by a suitable manually
				operated shut-off valve which is:
(A)Threaded
				directly into the service outlet of the container; or
(B) Is an integral part of a substantial
				fitting threaded into or on the service outlet of the container; or
(C)Threaded directly into a substantial
				fitting threaded into or on the service outlet of the container.
(iii) The shut-off valve is
				equipped with an attached handwheel or the equivalent.
(iv) The controlling orifice between the
				contents of the container and the outlet of the shut-off valve does not exceed
				5/16 inch in diameter for vapor withdrawal systems and one-eighth inch in
				diameter for liquid withdrawal systems.
(v) An approved pressure-reducing regulator
				is directly attached to the outlet of the shut-off valve and is rigidly
				supported, or that an approved pressure-reducing regulator is attached to the
				outlet of the shut-off valve by means of a suitable flexible connection,
				provided the regulator is adequately supported and properly protected on or at
				the tank.
(e)You must
				label all inlet and outlet connections except safety relief valves, liquid
				level gaging devices and pressure gauges on containers of 2,000 gallons water
				capacity, or more, and on any container used to supply fuel directly to an
				internal combustion engine, to designate whether they communicate with vapor or
				liquid space. Labels may be on valves.
(f)In lieu of an excess flow valve openings
				may be fitted with a quick-closing internal valve which, except during
				operating periods must remain closed. The internal mechanism for such valves
				may be provided with a secondary control which must be equipped with a fusible
				plug (not over 220°F melting point) which will cause the internal valve to
				close automatically in case of fire.
(g) You must not permit more than 2 plugged
				openings on a container of 2,000 gallons or less water capacity.
(h) You must provide containers of 125
				gallons water capacity or more manufactured after July 1, 1961, with an
				approved device for liquid evacuation, the size of which must be 3/4 inch
				national pipe thread minimum. A plugged opening will not satisfy this
				requirements.