Английский для сварщиков. Гричин С.В. - 83 стр.

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83
where the fuel gas and oxygen mix, and a tip where the flame issues from.
The regulators are attached to the fuel and to the oxygen sources. The
oxygen regulator is attached to the oxygen tank and drops the pressure from
about 21000 kPa (3000 lbf/in² = 200 atmospheres) to a lower pressure for the
torch. This pressure can be adjusted to suit the job at hand by turning a knob
on the regulator, and can be set from 0 to about 700–1400 kPa (100–200
lbf/in²). Likewise the fuel regulator is attached to the fuel source and drops
the pressure to a level for the torch to use. For acetylene this is 0 to 100 kPa
(15 lbf/in²).
The flexible hoses connect from the regulators to the torch and carry
the fuel gas and the oxygen. The fuel gas connections have left hand threads
and the oxygen connectors have right hand threads so that the two cannot be
interchanged, so as to help prevent accidents.
The welder wears goggles or a shield with a shaded lens to protect his
eyes from glare and flying sparks and splatter, and wears leather gloves to
help protect his hands from burns. He should also wear clothes and shoes
appropriate for welding. Sunglasses are not
adequate.
Note that the procedures and equipment used for gas welding are
essentially the same as for gas brazing.
]
Setting up the equipment
When using fuel and oxygen tanks
they should be fastened securely to a wall,
a post or a portable cart in an upright
position. An oxygen tank is especially
dangerous for the reason that the oxygen is
at a pressure of 21 MPa (3000 lbf/in² = 200 atmospheres) when full and if the
tank falls over and the valve strikes something and is knocked off, the tank
will become an unguided and unpredictable missile powered by the
compressed oxygen. It is for this reason that an oxygen tank should never be
moved around without the valve cap screwed
in place.
Never lay the acetylene tank down
while being used, as the acetone would start
to come out through the valve. If it was laid
down while being transported, it must be set upright, valve on top.
After the oxygen tank is securely fastened, remove the valve cap. With
the valve opening pointed away from the welder, open the valve slightly for
just a moment and then close it. This serves two purposes. For one, it blows
Oxygen Rich Butane Blow Torch Flame
Fuel Rich Butane Blow Torch Flame

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