Drain mold should be processed in accordance with different diameters and lengths appropriate choice of plate thickness,cylinder,ring bars, longitudinal bars, flanges, neat lap welding various parts and each part of the mold before using quality checks, to avoid open welding unsmooth surface .Drain pipe composes the cylinder mold (mold halves), socket flange, socket rings and other components. It has a solid structure,tight joint, easy to remove..