20X20 welded steel pipe erw steel
20X20 welded steel pipe erw steel, Difference between Seamless & ERW Stainless Steel pipeHow to Identify Seamless or ERW Stainless Steel pipes? To identify that a pipe supplied is seamless or ERW, Simply read the stencil on the side of the pipe. If it is ASTM A53, Type S means seamless. Type F is furnace but welded, Type E is Electrical resist welded. Thats how. It is the easiest way to identify wether pipe is seamless or ERW.