Our main category of steel pipe includes: Carbon seamless steel pipe,Spiral welded steel Pipe, ERW, Line pipe,flange,fitting of ASTM, DIN, JIS,ENand GB. has obtained the ISO9001 quality system Authentification Certificate, and operates in accordance with API 5L and API 5CT etc.The ERP,GRP,FRP has obtained the AWWA C 950 .so that the quality and service are guaranteed.Skype:chinarenpipe