We Zhangjiagang Shengdingyuan Pipe-making Co.,Ltd are a professional manufacture for seamless carbon steel tube, including cold drawing high precision seamless steel tube, hydraulic steel tube, black phosphated tube from OD4-60mm,with material ST37.4,ST52, DIN2391/C，EN10305-4 standard.

TS16949 certificate has been passed since 2009, now we have kept a stable cooperation with Benteler, Sany,supplier of parts manufacture of BMW,Volkswagon.Hope we can serve you.

Please contact me if any questions. Sincerely hope to find a way to cooperate with your esteem company.