Companies specializing in the production and processing: elbow flange, elbow, tee, U-tube and a series of marine accessories; according to international standards for the implementation of standards: CB/T46-2007, GB2506-89, CBM1012-81, CBM1013-81 , GB10746-89; marine blind board GB/T4450-1995, marine-sided flange welded base plate GB/T11693-94, marine exhaust pipes and other steel flanges GB/T3766-1996, marine elbow Standard GB/T10752 -1995 model φ20-φ1020, bend radius of 1 times, 1.5 times the standard elbow and other kinds of stainless steel, alloy steel, carbon steel pipe products. Flange series: GB (GB), Department of Mechanical Standards (JB), Ministry of Chemical Industry Standard (HG), American National Standard (ANSI), Japan Standard (JIS), German standard (DIS), British Standards (BS) and other domestic to the standard and non-standard flange, size DN10-DN2300 pressure 0.25-10's sleeve (SLIP-ON), weld neck (WELDING NECK), lap (LAP JOINT), socket (SOCKET WELDING), thread (THREADED) , Blind (BLIND), flat (FLAT) and manholes, endoscopy and other series.