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Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695

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BuyFindarrow_forward

Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695
Textbook Problem
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Once the torch is lit, why must the acetylene flow be increased until the flame stops smoking before the oxygen is turned on for adjustment?

To determine

The reason to increase the acetylene flow until the flame stops smoking before the oxygen is turned on for adjustment when the torch is lit.

Explanation

In gas welding, oxygen and acetylene mixture is used for welding purpose. Due to some reasons like; smaller distance between tip and workpiece, overheating of the tip, loosing of the tip and due to dirt in the tip the flame burn back inside the tip. This backflow of heat can be reached to torch, hose, and regulator, which is dangerous. This situation of return back of the flame to the tip is called flashback.

In this situation, the valve of the oxygen cylinder should be closed immediately and then close the flue valve...

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