Английский для сварщиков. Гричин С.В. - 78 стр.

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right pressure and velocity to produce a clean cut. All of this must be done

with a minimum consumption of oxygen and fuel gases. Careless workers

and workers not acquainted with the correct procedures waste both oxygen

and fuel gas.

Combination torch

Each manufacturer makes many different types of cutting tips. Although the

orifice arrangements and the tips are much the same among the

manufacturers, the part of the tip that fits into the torch head often differs in

design.

Because of these differences, there is the possibility of having two or

three different types of cutting torches in your kits. Make sure that the cutting

tips match the cutting attachment and ensure that the cutting attachment

matches the torch body. Figure above shows the different styles of tips, their

orifice arrangements and their uses. The tips and sears are designed to

produce an even flow of gas and to keep themselves as cool as possible. The

seats must produce leakproof joints. If the joints leak, the preheat gases could

mix with the cutting oxygen or escape to the atmosphere, resulting in poor

cuts or the possibility of flashbacks.

To make clean and economical cuts, you must keep the tip orifices and

passages clean and free of burrs and slag. If the tips become dirty or

misshapened, they should be put aside for restoration.

Tip Maintenance

In cutting operations, the stream of cutting oxygen sometimes blows

slag and molten metal into the tip orifices which partially clogs them. When

this happens, you should clean the orifices thoroughly before you use the tip

again. A small amount of slag or metal in an orifice will seriously interfere

with the cutting operation. You should follow the recommendations of the

torch manufacturer as to the size of drill or tip cleaner to use for cleaning the

orifices. If you do not have a tip cleaner or drill, you may use a piece of soft

copper wire. Do not use twist drills, nails, or welding rods for cleaning tips

because these items are likely to enlarge and distort the orifices.