... of tubular electric heating element is in a metal tube into the heating wire, and the gap part of ... . Safe using and reliablity, is the preferred electrical heating pipe for manufacturer of various electric appliances.4.Heating pipes are widely ... materials: magnesium oxideTube Material: Stainless steel seamless pipe, welded pipe, copper, yellow brass pipe, carbon steel pipeCommon diameter:Φ22,Φ20,Φ18,Φ ...