Oxy-acetylene welding is one of the flame welding or gas weld process, because the
flame is produced of mixture of gasses in a combustion chamber for heat provided
to the job. Oxy-acetylene mixture of gasses most commonly used for producing high
It is oldest development fusion welding process. No pressure is required on the job
to be welded, the heat is drive to welding the pieces. The acetylene is obtained
by the action of oxygen and calcium carbide.
CaC2 + 2H2O = Ca(OH)2 + C2H2
The gas acetylene( C2H2 )is play the most important role in Oxy-acetylene welding
because it has the highest calorific value.
In gas welding the heating and cooling rate is slow, so it is advantage in some material
welding from welding failure.
The flame can be controlled easily where need low and high temperature for welding
or brazing or soldering.
Filler metal deposit rate can be controlled easily, because source of heat and filler
metals are separate.
Preheating facility is in welder’s hand. So where required it can be applied.
In comparison of other welding process, it is low cost and low maintenance.