Fire Code of the Philippines Ebook - SafetySignsPH.com Fire Code of the Philippines eBook - SafetySignsPH | Page 417

8. Oxygen piping shall be made of steel, wrought iron, brass or copper
pipe or approved seamless non-ferrous gas tubing. Tubing shall be
used only for pressures of ten and fifty four-hundredths kilograms (10.54
kg) per square centimeters or less.
9. Piping shall be protected against injury, and allowance made for
contraction, expansion, jarring and vibration. If laid underground, it
shall be protected against corrosion. Low points in piping shall be
provided with drip pots and drain valves, the latter to be normally
closed with screw caps or plugs. Oxygen piping shall not be placed in
any location where it may be exposed to contact with oil.
10. All piping shall be tested and proven tight at one and one-half (1.5)
times its maximum working pressure. Any medium used for testing
oxygen lines shall be oil-free. Flames shall not be used to detect leaks.
11. All buried pipe and tubing and outdoor ferrous pipe and tubing shall
be covered or painted with a suitable corrosion-resisting material.
12. No hotworks shall be performed on an acetylene or oxygen pipeline,
including the attachment of hangers or supports, until the line has
been purged. Only oil-free air, oil-free nitrogen, or oil-free carbon
dioxide shall be used to purge oxygen lines.
L. Manifolding of Cylinders
1. Oxygen manifold shall not be located in an acetylene generator
room, or in close proximity to cylinders of combustible gases. Oxygen
manifolds shall be located away from highly flammable material,
especially oil, grease or any substance likely to cause or accelerate
fire.
2. The aggregate capacity of fuel gas cylinders connected to one
manifold inside a building shall not exceed eighty four and nine tenths
cubic meters (84.9 m 3 )of gas or one hundred thirty five kilograms (135
kg) in the case of liquefied petroleum gas. More than one such
manifold each supplying one blowpipe or one machine may be
located in the same room if separated with at least fifteen meters (15
m) distance.
3. It is necessary to manifold fuel gas cylinders having an aggregate gas
capacity in excess of eighty-four and nine tenths cubic meters (84.9
m 3 ) or one hundred fourteen kilograms (114 kg) of liquefied petroleum
gas (LPG). Storage exceeding above amount shall be in separate
room as provided for by this IRR, or cylinders shall be kept outside or in
a special building. Buildings, rooms or compartments provided for
such storage shall be well ventilated and be without open flame
heating or lighting devices.
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