... 5.Supply:150000ton/year Product: Industrial Stainless Steel Seamless/Welded Pipe Material Grade: 304, 304L, 316, 316L, 321, 317, 317L, ... specialized in production and operation of Sainless steel seamless/welded pipe, pipe fittings and complete set of equipment, etc. We are ... TUV,CCS, ABS, RINA, and acquired certificates such as PED97/23/9CE/1997, third-grade metering, the People's Republic of ...