... exist-generally, a tube has tighter engineering requirements than a pipe. Jiangsu Sheye Metal is a professional manufacturer specialized ... widely used in such industries as petroleum, chemical industry, machinery, electric power, chemical fiber, papermaking, printing ... S44660, S44735, S44736 Duplex/Super Duplex Stainless Steel Seamless Pipe S31500, S31803, S32205, S32304, S32520, S32550, ...