There are two kinds of common equipment to choose, i. e. gas heating and frequency conversion heating, which are indispensable steps in the exterior coating process of preheated LSAW steel pipes.


Pipeline surface treatment: combustible gas type preheater combustion pipe surface is likely to stick a small amount of dye garbage, play the role of garbage.


Skin stripping machine: Scrap steel is heated by skin effect frequency through intermediate frequency coil. The steel surface coating can quickly soften and strip easily.


Equipment cost: Equipment cost is not comparable, but the overall cost is higher than that of medium frequency furnace gas stove.


Environmental protection: Gas heating generally uses green gas; while the frequency heating power will produce harsh noise in the operation process, at the same time, if there is no better frequency power supply pretreatment, the medium frequency power supply will also cause pollution to odd harmonic power grid.