Posts Tagged ‘Gas Welders’

An Insight on Gas welding:

Wednesday, September 1st, 2010

In gas welding, some hazards happen from fire and explosion. Explosion or fire can happen while using gas welding due to certain reasons:

1. If welder does not handle lighted blow pipe carefully, it can cause burns to him or other workers.

2. If blowpipe is used too close to combustible material.

3. Gas leakage from hoses, valves or other equipments.

4. Misuse of oxygen.

5. Backfires and flashbacks.

Lighted blowpipes are dangerous equipment which can burn the user badly. It can also injure other people and set flammable materials on fire. By following these precautionary steps you can prevent injury

• Always work in a safe location which is away from other people.

• Before starting your work, do wear welding helmet, protective clothes and gauntlets to protect yourself from fire.

• Clamp the work piece, do not hold it by hand.

• Once your work is over, switch off the blowpipe.

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Gas Welding Torch Types

Monday, December 14th, 2009

A gas welder fuses metals by mixing oxygen and fuel gas. There are controls provided in the welder over the proportions of the gases and amount that should be burnt up. The torches have two needle valves. One is used to control the amount of oxygen that has
to flow. Another valve helps us to control the flow of the fuel gas.

The torches are of two types;

  • Low pressure
  • Medium pressure

A low pressure torch is otherwise called as an injector torch. In this torch the fuel gas pressure is less than or equal to 1 pound per square inch. Oxygen pressure is anywhere between 10-40 pounds. This depends upon the size of the tip of the torch.

A medium pressure torch is otherwise called as a balanced pressure torch. Sometimes it is referred to as an equal pressure torch. This is primarily because the pressure of fuel gas and oxygen are equal.

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