It has passed the ISO9001: 2000 international quality system certification in 2003 . Our main products are all kinds of specification of tubes, Such as GB、 ASTM、 API 5L、 API 5CT, DIN, And JIS. The annual production capacity is 36000 tons, Its products have been sold around China and exported to over dozens of countries and regions in the world such as Southeast Asia, The Middle East, Europe and America etc. , Enjoying the very high prestige in the domestic and foreign markets.