... 5.Supply:150000ton/year Product: Industrial Stainless Steel Seamless/Welded Pipe Material Grade: 304, 304L, 316, 316L, 321, 317, ... cases, or as customer' requestBest suitFluid and gas transport ,structure ,boiler,heat exchanger,super heaterCertificateISO, DNV, BV, TUV, CCS ... in production and operation of Sainless steel seamless/welded pipe, pipe fittings and complete set of equipment, etc. We ...