Securite Contre Le Feu - Air Liquide Optipuls 280 i Safety Instruction For Use And Maintenance

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5. SECURITE CONTRE LE FEU /

PROTECTION FROM FIRE
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6. SECURITE D'EMPLOI DES GAZ /
SAFETY IN THE USE OF GASES
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a) Consignes communes à l'ensemble des gaz
a.1) Risques encourus
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Remove inflammable products and equipment from the area where arc spatter may
occur, or protect them.
Do not weld or cut near a ventilation pipe, gas pipe or other installation which might
cause the fire to spread quickly.
As a general rule, the operator should have a fire-extinguisher near him. The fire-
extinguisher must be compatible with the type of fire which may break out.
Make sure of the proper positioning of the ground connection. If this has a faulty
contact, it may cause an arc which itself could cause a fire.
a) Recommendations for all types of gas
a.1) Risks incurred
Faulty use of gas exposes the user to two main dangers, especially when
working in confined spaces :
! the danger of asphyxiation or intoxication
! the danger of fire and of explosion
a.2.) Precautionary measures to comply with
!" Storage in compressed form in cylinders
Comply with the safety instructions given by the gas supplier and
especially:
!"the storage or use areas must be properly ventilated and
sufficiently distant from the cutting/welding area and other
sources of heat, and not be susceptible to technical incidents;
!"fasten the cylinders securely, avoid impacts;
!"no excessive heat (> 50° C).
!" Piping and tubing
!"routinely check the impermeability of the fixed piping as well
as the rubber tubing;
!"never use a flame to detect a leak. Use an appropriate
detector or, in the absence of this, use soapy water and a
brush;
!"use conventional colors for the pipes, according to the
different gases;
!"distribute the gas at the pressures recommended on the
equipment instructions;
!"do not leave hoses lying about in the workshops; they may be
damaged.
!" Use of the equipment
!"use only equipment which is designed for the gas used;
!"check that the cylinder and the pressure-reducing valve
correspond to the gas necessary for the process;
!"never lubricate the cocks, handle them gently;
!"pressure-reducing valve:
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do not forget to bleed the cylinder cocks before
connecting the pressure-reducing valve
# make sure that the pressure-reducing screw
is loosened before connection to the cylinder
# check that the coupling is properly tightened
before opening the cylinder cock
# open the latter very slowly, a fraction of a turn.
!"in case of leak, never loosen a fitting under pressure; first
close the cylinder cock.
!" Work in confined spaces
piping, pipe-lines, ship holds, shafts, manholes, cellars, cisterns, vats,
tanks, ballasts, silos, reactors)
Special precautions must be taken before any welding operations in
these enclosures where the dangers of asphyxiation-intoxication and
fire-explosion are very great.
A work-permit procedure defining all the safety measures must be
systematically implemented.
OPTIPULS 280
(such as, in particular, tunnels,
/ 350 / 380 / 500
I I I W I W