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ES&H
Manual Flammable
Gas Supplement |
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Chapter
3 Storage and Handling of
Liquefied Petroleum Gases |
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(Copyright 2004,
National fire Protection Association, Quincy, MA 02269)
Note:
This appendix
presents National Fire Protection Association (NFPA)-58 as of 2004; it is
typically revised every five years. You
are responsible for meeting the current standard at the time of approval of
your gas system. We provide this
material here to indicate the scope and content of the standard.
10.3.
Scope.
10.3.2.
Application.
This chapter applies to the construction,
ventilation, and heating of structures, parts of structures, and rooms housing
LP-Gas systems where specified by other parts of the code.
10.3.3.
Nonapplication. The
provisions of this chapter do not apply to buildings constructed or converted
before December 31, 1972.
10.4.
Separate
Structures or Buildings.
10.4.2.
Construction
of Structures or Buildings.
10.4.2.1.
Separate
buildings or structures shall be one story in height and shall have walls,
floors, ceilings and roofs constructed of noncombustible materials.
10.4.2.2.
Either
of the following shall apply to the construction of exterior walls, ceilings,
and roofs:
1)
Exterior
walls and ceilings shall be of lightweight material designed for explosion
venting.
2)
Walls
or roofs of heavy construction, such as solid brick masonry, concrete block, or
reinforced concrete construction, shall be provided with explosion venting
windows that have an explosion venting area of at least 1 ft2 (0.1 m2)
for each 50 ft3 (1.4 m3) of the enclosed volume.
10.4.2.3.
The
floor of separate structures shall not be below ground level.
10.4.2.4.
Any
space beneath the floor shall be of solid fill, or the perimeter of the space
shall be left entirely unenclosed.
10.4.3.
Structure
or Building Ventilation. The structure shall be ventilated
using air inlets and outlets, the bottom of which shall be more than six inches
(150 mm) above the floor, and ventilation shall be provided in accordance with
the following:
1)
Where
mechanical ventilation is used, the rate of air circulation shall be at least 1
ft3/min.ft2 (0.3 m3/min. m2) of
floor area.
2)
Outlets
shall discharge at least 5 ft (1.5 m) from any opening into the structure or
any other structure.
3)
Where
natural ventilation is used, each exterior wall shall be provided with one
opening for each 20 ft (6.1 m) of length.
4)
Each
opening shall have a minimum size of 50 in2 (32,250 mm2),
and the total of all openings shall be at least 1 in2/ft2
(720 mm2/m2) of floor area.
10.4.4.
Structure
of Building Heating. Heating shall be by steam or hot
water radiation or other heating transfer medium, with the heat source located
outside of the building or structure (see Section 6.20), or by
electrical appliances listed for Class I, Group D, Division 2 locations, in
accordance with NFPA 70, National Electrical Code.
10.5.
Attached
Structures or Rooms within Structures
10.5.2.
Construction
of Attached Structures
10.5.2.1.
Attached
structures shall be spaces where 50 percent or less of the perimeter of the
enclosed space is comprised of common walls.
10.5.2.2.
Attached
structures shall comply with 10.2.1.
10.5.2.3.
Common
walls of structures shall have the following features:
1)
A
fire resistance rating of at least 1 hour
2)
Where
openings are required in common walls for rooms used only for storage of
LP-Gas, 1 1/2 hour (B) fire doors
3)
A
design that withstands a static pressure of at least 100 lb/ft2 (4.8
kPa)
10.5.2.4.
Where
the building to which the structure is attached is occupied by operations or
processes having a similar hazard, the provisions of 10.3.1.3 shall not apply.
10.5.2.5.
Ventilation
and heating shall comply with 10.2.2 and 10.2.3
10.5.3.
Construction of Rooms within Structures.
10.5.3.1.
Rooms
within structures shall be spaces where more than 50 percent of the perimeter
of the space enclosed is comprised of common walls.
10.5.3.2.
Rooms
within structures shall be located in the first story and shall have at least
one exterior wall with unobstructed free vents for freely relieving explosion
pressures.
10.5.3.3.
Walls,
floors, ceilings, or roofs of the rooms shall be constructed of noncombustible
materials.
10.5.3.4.
Exterior
walls and ceilings shall be of lightweight material designed for explosion
venting.
10.5.3.5.
Walls
and roofs of heavy construction (such as solid brick masonry, concrete block,
or reinforced concrete construction) shall be provided with explosion venting
windows or panels that have an explosion venting area of at least 1 ft2
(0.1m2) for each 50 ft3 (1.4 m3) of the
enclosed volume.
10.5.3.6.
Walls
and ceilings common to the room and to the building within which it is located
shall have the following features:
1)
A
fire resistance rating of at least 1 hour
2)
Where
openings are required in common walls for rooms used only for storage of
LP-Gas, 1 1/2 hour (B) fire doors
3)
A
design that withstands a static pressure of at least 100 lb/ft2 (4.8
kPa)
10.5.3.7.
Where
the building to which the structure is attached is occupied by operations or
processes having a similar hazard, the provisions of 10.3.1.3 shall not apply.
10.5.3.8.
Ventilation
and heating shall comply with 10.2.2 and 10.2.3.
Revision
Summary
Periodic Review 05/06/16 No changes per TPOC
Revision 1.0 06/15/11 New content
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