Page 87 - CITS - Fitter - Trade Theory

FITTER - CITS

Gas Welding Process And ITS Accessories

1 Introductions to Gas Welding:
Gas welding encompasses several welding processes that use fuel gases, such as acetylene, propane, or
natural gas, combined with oxygen to produce a flame capable of melting and fusing metals. One of the most
common forms of gas welding is oxy-acetylene welding (OAW), where acetylene and oxygen are the primary
gases used.

2 Accessories Used in Gas Welding:
1 Gas Cylinders: Gas cylinders contain the fuel gas (e.g., acetylene) and oxygen used in the welding process.
These cylinders are typically made of steel and are filled and pressurized with the respective gases.
2 Regulators: Regulators are devices attached to the gas cylinders to control the pressure and flow of the
gases being supplied to the welding torch. They ensure that the gases are delivered at the correct pressure
and flow rate for the welding operation.
3 Welding Torch: The welding torch is a handheld device that mixes the fuel gas and oxygen in precise
proportions and directs the resulting flame onto the workpiece. It contains valves and tips to control the flow of
gases and adjust the characteristics of the flame.

4 Hoses: High-pressure hoses connect the gas cylinders to the welding torch and regulators, allowing the gases
to flow from the cylinders to the torch under controlled conditions. These hoses are typically made of durable
materials such as rubber or reinforced synthetic materials.
5 Welding Tips: Welding tips, also known as welding nozzles, are interchangeable components of the welding
torch that determine the size and shape of the flame. Different tips are used for various welding applications
and metal thicknesses.
6 Striker or Igniter: A striker or igniter is used to ignite the mixed gases at the welding torch tip, creating a flame
for welding operations. This can be a handheld device with a flint or a built-in igniter mechanism on the torch.
7 Welding Goggles or Helmet: Welding goggles or a welding helmet with a suitable shade lens are essential
for protecting the welder’s eyes from harmful UV radiation, intense light, and sparks generated during welding.

8 Welding Gloves: Welding gloves provide protection for the welder’s hands from heat, sparks, and molten
metal splatter. They are typically made of heat-resistant materials such as leather or Kevlar.
9 Welding Apron or Jacket: An apron or welding jacket made of flame-resistant material protects the welder’s
body from heat, sparks, and splatter during welding operations.

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CITS : CG & M - Fitter - Lesson 12