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72
size of the orifice in the tip. In fact, the tip should be chosen first according to
the job at hand, and then the regulators set accordingly.
Speaking
23 Imagine you are explaining to an apprentice how to set up the
equipment. Use the right column of the table in the previous exercise and the
tips below to give the instructions.
First
fasten fuel and oxygen tanks securely to a wall, a post or a portable cart
in an upright position.
Then remove … .
After that … .
…
…
Having attached ... .
…
…
…
…
After this preparation ... .
…
Finally … .
Revision
24 Decode the abbreviations.
SMAW, MMA, GMAW, MIG, FCAW, SAW, GTAW, TIG, EGW
25 Label the picture of a portable welding outfit with the words below.
header pipe
line valve
filler plug
release
regulator
escape pipe
flash arrestor chamber
check valve and drain plug
acetylene cylinder
Fig. 10 Portable welding outfit
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