Complete Bookshop/CompleteWorkshop.iso/how_to/weld/11

Text File | 1990-11-17 | 2.0 KB | 255 lines

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A BETTER STEP 5~
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Open  the   acetylene  valve  just
enough to hear a faint hiss of gas
coming out of  the torch tip. Open
the  oxygen  valve  just enough to
hear the hiss increase  in volume.
The hiss should  still  be  fairly
quiet. Spark light the flame.
   If you have too much gas coming
out of the torch,  the  flame will
not stay lit,  or it will ignite a
short  distance  in  front  of the
torch tip.~
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Too much gas overall.
Notice the gap.~
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   If you have too little overall
gas pressure, the flame can back-
fire into the tip.  While you see
no fire,  you  will  hear a hiss,
buzz  or  whistle  indicating the
flame is  happening  inside. Turn
off  the  torch  valves  quickly,
because this can  eventually melt
the torch tip.~
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STEP 6
~
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    Kill  the  flame  by  lightly
closing the acetylene torch valve
then the  oxygen  torch valve. If
you  reverse   the   order,   you
release  a  cloud  of  yucky pure
acetylene smoke.~