Is the heating of steel to a relatively high temperature shortly after welding and maintaining that temperature for specific period of time, the purpose is to reduce internal stresses, caused by welding quenching hardening or by cold working, It is also has and advantageous  effect on the elasticity, ductility and strength of the metal

Is a very effective means of pre venting weld metal or base metal cracking, It is the application of heat to the base metal prior to welding or cutting operation

Was the first from of heat treatment applied to ferrous metal, it is essentially the softening   of a base metal to make it more malleable. The process involves a controlled heating and slow cooling which induces softness, additionally, the process removes gasses, relieves stresses and enhance the mechanical properties in alloyed steels. This is generally performed at temperature.

PT. MITRA ARTHA CEMERLANG has arrange of high velocity burner to use all quantity of gas or oil to the purpose of providing in situ heat treatment on large fabrication such as caustic or sulphuric liquid storage tank, LPG etc. Many sphere has been heat treated in this manner which entails turning the sphere into an internal furnace and externally insulation with mineral wool.