// CODE SNIPPET
63.4.6.3 Portable Cryogenic Containers
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Portable containers used for cryogenic fluids located outdoors shall be separated from exposure hazards in accordance with Table 63.4.6.3. [55:8.6.3]
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Minimum Distance
|
||
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Exposure
|
ft
|
m
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| (1) Building exits |
10
|
3.1
|
| (2) Wall openings |
1
|
0.3
|
| (3) Air intakes |
10
|
3.1
|
| (4) Property lines |
5
|
1.5
|
| (5) Room or area exits |
3
|
0.9
|
| (6) Combustible materials, (e.g., paper, leaves, weeds, dry grass, or debris) |
15
|
4.5
|
| (7) Incompatible hazardous materials |
20
|
6.1
|
[55: Table 8.6.3]
63.4.6.3.1
Non-bulk portable containers of liquefied hydrogen shall be separated from exposure hazards in accordance with Table 63.4.6.3.1. [55:8.6.3.1]
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Minimum Distance to Buildings on the Same Property
|
||||||
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Maximum Amount per Storage Area (gal)
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Minimum Distance Between Storage Areas (ft)
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Minimum Distance to Lot Lines of Property That Can Be Built Upon (ft)
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Minimum Distance to Public Streets, Public Alleys, or Public Ways (ft)
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Less than 2-Hour Construction
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2-Hour Construction
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4-Hour Construction
|
|
0-39.7
|
5
|
5
|
5
|
5
|
0
|
0
|
|
39.8-186.9
|
10
|
10
|
10
|
10
|
5
|
0
|
|
187-448.7
|
10
|
15
|
15
|
20
|
5
|
0
|
|
448.8-747.8
|
10
|
20
|
20
|
20
|
5
|
0
|
|
>747.8
|
20
|
25
|
25
|
20
|
5
|
0
|
For SI units: 1 ft = 305 mm.
Notes:
Notes:
- For requirements on minimum distance to air intakes, see 63.3.6.2.4.
- For requirements on minimum distance to building openings including exits, see 63.3.6.2.5.
- When 63.4.6.3.2 is used as a means of distance reduction, the configuration of the fire barriers should be designed to allow natural ventilation to prevent the accumulation of hazardous gas concentrations.
63.4.6.3.2 Fire Barriers
A 2-hour fire barrier wall shall be
permitted in lieu of the distances specified by Table 63.4.6.3 or
Table 63.4.6.3.1 when in accordance with the provisions of
63.4.6.3.2.1 through 63.4.6.3.2.4. [55:8.6.3.2]
63.4.6.3.2.1
The fire barrier wall shall be without openings or penetrations. [55:8.6.3.2.1]
63.4.6.3.2.1.1
Penetrations of the fire barrier wall by conduit
or piping shall be permitted provided that the penetration is
protected with a firestop system in accordance with the building code. [55:8.6.3.2.1.1]
63.4.6.3.2.2
63.4.6.3.2.3
The fire barrier wall shall be located not less than 5 ft (1.5 m) from any exposure. [55:8.6.3.2.3]
63.4.6.3.2.4
The fire barrier wall shall not have more than two
sides at approximately 90 degree (1.57 rad) directions or not
more than three sides with connecting angles of approximately
135 degrees (2.36 rad). [55:8.6.3.2.4]
Upcodes Diagrams
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