TIANJIN SIEN MACHINERY EQUIPMENT CO., LTD.

Sien mainly manufactures series of pressure piping products for offshore platforms, such as fasteners, HP flanges, pipe fittings, cylinder skid equipment, piping specialties, which are widely used in petrochemical, energy, electric, heat supply and vessel building etc. key industries. Our company has passed the certification of QMS ISO9001, EMS ISO14001, OHSMS ISO45001 and ISO50001. With good quality, competitive price and excellent customer service, Sien has become the preferred supplier of CNOOC, CNPC, Sinopec, CNCEC, COSL, CMG, BOMESC, CIMC Raffles, WISON, COOEC-Fluor, QMW and CPP etc. well-known enterprises and have secured multiple supply contracts with them, establishing stable supply chain partnerships.