... , GB,GOST,EN ZHEJIANG PENGYE is professional manufacture of stainless steel seamless pipe and tube in China. 1.SIZE: OD from 6mm to ... /TP304/304L,321/F321,TP316L/316L,317L, 347H, 310S , Duplex S31803, etc.3.Standard: ASTM A312,A213,A269 ,JIS, GB, DIN ... mainly purchases raw material from Baosteel Group Shanghai No. 5 Steel Factory, Huzhou Jiuli Group, Taiwan, etc.The pipes and tubes ...