Английский язык для инженеров сварочного производства. Гричин С.В - 67 стр.

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67
Blowout disks or spring-loaded relief valves are the two most common types
of devices used. When a blowout disk ruptures, it sounds like a cannon.
Spring-loaded relief valves usually make howling or shrieking like noises. In
either case, your first action, after you recover from your initial fright, should
be to turn off the cylinder valve. Remove the regulator and tag it for repair or
disposal. When opening a gas cylinder, you should just “crack” the valve a
little. This should be done before attaching the regulator and every time
thereafter. By opening the cylinder before connecting the regulator, you blow
out any dirt or other foreign material that might be in the cylinder nozzle.
Also, there is the possibility of a regulator exploding if the cylinder valve is
opened rapidly.
WARNING: Oil or other petroleum products must never be used
around oxygen regulators because these products will either cause a regulator
explosion or fire
Cutting Torches
The equipment and accessories for oxygas cutting are the same as for
oxygas welding except that you use a cutting torch or a cutting attachment
instead of a welding torch. The main difference between the cutting torch and
the welding torch is that the cutting torch has an additional tube for high-
pressure cutting oxygen. The flow of high-pressure oxygen is controlled from
a valve on the handle of the cutting torch. In the standard cutting torch, the
valve may be in the form of a trigger assembly like the one in figure below.
On most torches, the cutting oxygen mechanism is designed so the cutting
oxygen can be turned on gradually. The gradual opening of the cutting
oxygen valve is particularly helpful in operations, such as hole piercing and
rivet cutting.
Torch Body
Most welding
torches are designed so
the body of the torch
can accept either
welding tips or a
cutting attachment. This
type of torch is called a combination torch. The advantage of this type of
torch is the ease in changing from the welding mode to the cutting mode.
There is no need to disconnect the hoses; you just unscrew the welding tip
and then screw on the cutting attachment. The high-pressure cutting oxygen
is controlled by a lever on the torch handle, as shown in figure below.
Fig. 6 One piece oxygas cutting torch

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