Steel pipes: Standard: ASME B36.10M---1996, GB8163---1999  GB8162---1999    GB3087---1999, JIS, DIN, ANSI, HGJ, SHJ, SY, DL Main products: ERWpipe, spiral welded pipe and seamless pipe Material: carbon steel, alloy steel, Aluminum alloy and so on. WT:     SCH20 SCH30 SCH 40 SCH80 SCH160 We can also produce big tube for dia. 377-4,000mm / thickness: 8-50mm and spiral pipe with the DN ranging from 219 to 3420 mm and 6-25mm thickness We would be grateful to prepare our products for your prosperity. You will find we deserve your trust!