Hunan Shinestar Steel Group specialized in manufacturing Seamless steel pipe, ERW steel pipe,LSAW steel pipe, SSAW steel pipe, We have invested six factorie through China. As a trusted vendor, we can assure that all of our items can meet the requirements of internation standards, such us API 5L, ASTM A53, EN 10219, DIN 2458, BS1387 and so on. Besides,  all of the products can pass the SGS , BV, Lioyds etc. test. If you want to learn more about us, please feel free to visit our website www ( dot) hnssd (dot) com.My email  address is alice ( dot) shinestar( at) gmail(dot ) com.