Zhejiang Yongshang Special Material Co.,Ltd is a large and medium-sized domestic stainless steel industry base, Austenitic stainless steel pipes ,Super austenitic stainless steel pipes, duplex stainless steel pipes, Super Duplex stainless steel pipes, Anti-corrosion alloy, nickel-based alloy .welded pipe, pipe fittings, seamless steel pipe production, sales, as well as high-tech product research and development as as a whole. 
The company passed ISO9001,BV, ABS, CCS, DNV, TUV, LR, KR, NORSOK M‑650 etc.