made as to customers treated with 160C surface nitriding,high security and anti-dry capacity factory price Stainless steel 1)heating ... )The structure of tubular electric heating element is in a metal tube into the heating wire, and the gap part of the tightly filled in crystallization of ... carbon steel pipeCommon diameter:Φ22,Φ20,Φ18,Φ16,Φ14,Φ12,Φ10,Φ8.5,Φ8,Φ6.5 Length:200mm5000mmSurface treatment: a ...