SECTION
12
LP Container Requirements
Table 3.2.2.2 Separation Distances Between Containers, Important Buildings, and Other Properties* minimum distances Water capacity per container gal
m3
<125d
<0.5d
mounded or underground containersa ft
125-250
0.5 - 1.0
251-500
1.0+ - 1.9
501-2000
1.9+ - 7.6
m
10
3
aboveground containersb ft
M
FT
M
a
0e
0e
0
0
b
10
3
0
0
10
3
3
1
25
7.6
3
1
2001-30,000
7.6+ - 114
50
15
30,001-70,000
114+ - 265
75
23
70,001-90,000
265+ - 341
100
30
90,001-120,000
341+ - 454
125
38
50
15
120,001-200,000
454+ - 757
200
61
200,001-1,000,000
757+ - 3785
300
91
>1,000,000
>3785
400
122
Table 3.2.2.2(d) Separation Distance Between Container Pressure Relief Valve and Building Openings
distance Horizontally from relief valve discharge to opening below exchange discharge container or filled type on site ft M Cylinder
Exchange
3.0
0.9
discharge fROm relief valve, vent discharge, and filling connection to exterior source of ignition, openings into direct-vent appliances, mechanical ventilation air intakes FT
M
5.0
1.5
Cylinder
Filled On Site
3.0
0.9
10.0
3.0
ASME
Filled On Site
5.0
1.5
10.0
3.0
(f ) Where underground multicontainer installations are made of individual containers having a water capacity of 125 gal (0.5 m3) or more, such containers shall be installed so as to allow access at their ends or sides to facilitate working with cranes or hoists. (g) In applying the distance between buildings and ASME containers of 125-gal (0.5-m3) or more water capacity, a minimum of 50 percent of this horizontal distance shall also apply to all portions of the building that project more than 5 ft. (1.5 m) from the building wall and that are higher than the relief valve discharge outlet. This horizontal distance shall be measured from a point determined by projecting the outside edge of such overhanging structure vertically downward to grade or other level upon which the container is installed.
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Gas Equipment Catalog
between containersc
See 3.2.2.2 Exception No. 2. See 3.2.2.2 (g). c See 3.2.2.2 (f ). s See 3.2.2.2 (a). e See 3.2.2.2 (b), (c), and (d).
1/4 of sum of
diameters of adjacent containers
Exception No. 1: Not applicable to installations in which overhanging structure is 50 ft. (15 m) or more above the relief valve discharge outlet. Exception No. 2: Where the distance from a 2001 to 30,000 gal. container to a building are in accordance with 3.11.2 and 3.11.4. 3.2.2.3 Where storage containers having an aggregate
water capacity of more than 4000 gal (15.1 m3) are located in heavily populated or congested areas, the siting provisions of 3.2.2.2 and Table 3.2.2.2 shall be permitted to be modified as indicated by the fire safety analysis described in 3.10.2.2. 3.2.2.4 Aboveground multicontainer installations comprised of containers having an individual water capacity of 12,000 gal (45 m3) or more and installed for use in a single location shall be limited to the number of containers in one group, with each group separated from the next group in accordance with the degree of fire protection provided in Table 3.2.2.4. Exception: Where the provisions of 3.11.3 and 3.11.4 are met the minimum separation distance between groups of ASME containers protected by hose stream only shall be one-half the distances in Table 3.2.2.4. 3.2.2.5 Underground or mounded containers shall be located outside of any buildings. Buildings shall not be constructed over any underground or mounded containers. Sides of adjacent containers shall be separated in accordance with Table 3.2.2.2 but shall not be separated less than 3 ft. (1 m). Where underground or mounded containers are installed parallel with ends in line, the number of containers in one group shall not be limited. Where more than one row is installed, the adjacent ends of the tanks in each row shall be separated by not less than 10 ft. (3 m). * This section is an excerpt from the NFPA 58 Liquified Petroleum Gas Code â&#x20AC;&#x201D; 2001 Edition
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