Preheating Process of LSAW Steel Pipe

Preheating lsaw steel pipe external coating process essential step, there are two general equipment selection, that is, gas heating type and frequency heating type.

Pipe treatment of the surfaces: Combustible gas type preheating furnace to burn the outer surface of the tube is likely stick a small amount of dye grunge, grunge to play a role.

Flayer: Using skin effect frequency heating of the scrap steel through an intermediate frequency coil, steel surface coating can be quickly softened Flayer convenient.

Equipment costs: equipment costs not much comparable, but the overall cost is higher than the intermediate frequency furnace gas furnace.

Environmental protection: gas heating general use of green fuel gas; and frequency heating uses electricity during operation will produce harsh noise, at the same time, if not better frequency power supply pretreatment, intermediate frequency power supply but also on the odd harmonics grid pollution.