We manufacture stainless seamless steel pipes in Shanghai China. The company Shanghai Sunzone Steel pipe Co., Ltd has been recognized as the high-class supplier of such products by SINOPEC, CNPC & CNOOC (Three main petroleum & petrochemical campanies in China). Moreover our products have got ISO 9001&PED certificates. The specification for the products as follow: Cold drawn and cold rolled austenitic material stainless steel pipe Grade Available: 304, 304L, 316, 316L, 321, 310S, 310H, 317L, 321H, 304H, 347H, 904L Outside Diameter(OD): 10~530mm(1/8"-20"); Wall Thickness(WT): 1~30mm. Standards: ASTM A 213 /A269 /A312,          ASME SA213 /SA269 /SA312,          GB 13296 /T14976 /T14975,          EN 10216-5, DIN 17456, 17458,          JIS G3459, G3463.