Stainless Steel Pipe Fitting 1) Grade:321,304,304L,316,316L,317,317L,310s ... . 3) Standards: /ASTM/ASME/DIN/JIS and so on. Stainless Steel Pipe Fitting Features:1) pipe diameter : 6mm-630mm pipe thickness : 0 ... ,we assure of our best attention all the time. type fitting size6mm-630mm pipe thickness : 0.8mm-25mm grade321, 304, 304L ...