Location of DOT Cylinders
From NFPA 58, Appendix G
Federal, state, and local ordinances and regulations should be observed
at all times.
1) 5 foot minimum between relief valve discharge and external
source of ignition (air conditioner), direct vent, or mechanical
ventilation system (attic fan).
2) If the DOT cylinder is filled on-site from a bulk truck, the
filling connection and vent valve must be at least 10 feet from
any external source of ignition, direct vent, or mechanical ventilation
system.
Location of ASME Cylinder
From NFPA 58, Appendix G
Federal, state, and local ordinances and regulations should be
observed at all times.
1) Regardless of its size, any ASME tank filled on-site must be
located so that the filling connection and fixed liquid level
gauge are at least 10 feet from external source of ignition (i.e.
open flame, window A/C, compressor, etc.), intake to direct vented
gas appliance or intake to a mechanical ventilation system.
2) May be reduced to 10 feet minimum for a single container of
1200 gallons water capacity or less if it is located at least
25 feet from any other LP-Gas container of more than 125 gallons
water capacity.
3) Minimum distances from underground containers shall be measured
from the relief valve and filling or level gauge vent connection
a t the container, except that no part of an underground container
shall be less than 10 feet from a building or line of adjoining
property which may be built upon.
4) Where the container may be subject to abrasive action or physical
damage due to vehicular traffic or other causes it must be either
(a) placed not less than 2 feet below grade; (b) otherwise protected
against such physical damage.
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