... 2.WT:0.5mm-30mm 3.Grade:304,304L,321,F321,316,316L 4.Standard:DIN,AISI ... year Product: Industrial Stainless Steel Seamless/Welded Pipe Material Grade: 304, 304L, 316, 316L, 321, 317, 317L, etc. ... steel seamless/welded pipe, pipe fittings and complete set of equipment, etc. We are factory direct, ... time delivery, competitive price and best service! 304/316/316L/304L Stainless Steel Pipe-Seamless&Welded