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What is gas welding process, its advantages and disadvantages?


Today I will be discussing on what is gas welding, advantages and disadvantages. Previously I examined on What is Friction Welding? – its Applications, Advantages and Disadvantages and working principles. The big question today is…

What is gas welding process

What is gas welding process?

Gas welding is a metal joining process in which fuel gases (gasoline) and oxygen are used to weld and cut metals. It is also a metal joining process in which edge pieces of a metal that required joining is heated at their interface by producing coalescence with one or more gas flames such as oxygen and acetylene. the welding process can weld with or without the application of filler material to the joint.

Gas welding is also known as oxy-fuel welding, oxyacetylene welding, oxy welding. It was developed in 1903 by some French engineers Edmond Fouche and Charles Picard. They use pure oxygen to increase flame temperature instead of air. This flame helps in melting a metals and alloys e.g. steel.

Oxygen and acetylene burns as about 3,773k (3,500 degree Celsius). The basic two operations of oxyacetylene welding include welding and cutting; welding operation is carryout when two parent metals are heated to a temperature that produces shared pool of molten metal. It cools and produces a joint. Filler materials are sometimes added to the joint. It improves strength of the joint and produces stronger joint even stronger than the parent metal. Whilst in oxyacetylene cutting, there is a special cutting flame (obtain by releasing oxygen gas than acetylene in a torch valve). The torch is used to heat metal to its kindling temperature. it reaches stages where metal burns into a molten oxide as it flows out of the kerf as slag. It contains a mixing chamber, which helps in mixing oxygen and acetylene before it releases as flame.


Advantages and disadvantages of gas welding

Gas welding offers greater advantages than disadvantages. The following are benefits of oxyacetylene welding.

  • Ability to weld ferrous and nonferrous metals together
  • Neutral flame is used for welding and cutting both ferrous and nonferrous metals except brass
  • Equipment and tooling are inexpensive
  • It does not require electricity before it works
  • Gas welding equipment are portable
  • It does not require specialize labor


Despite great benefit of gas welding, it offers some disadvantages that can be overlook. These include;

  • Slow rate of cooling, leading to slow production
  • Not suitable for welding high strength steel
  • Cannot reach arc welding temperature
  • Not suitable for welding thick sections

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And that is it for this article, what is gas welding, advantages and disadvantages. Freely ask question via my comment box or answer the question below to assure me you understand. Thanks for reading and please share!

Question: in your own understanding explain gas welding process.

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