... PED, GOST 4.Standard:ASTM, JIS, DIN, GB,GOST ZHEJIANG PENGYE is professional manufacture of stainless steel seamless pipe and tube in China ... /316L,317L, 347H, 310S , Duplex S31803, etc.3.Standard: ASTM A312,A213,A269 ,JIS, GB, DIN, GOST4.Certification:ISO, DNV ... , PED, ASTM A312Our company mainly purchases raw material from Baosteel Group Shanghai ...