Stainless Steel Pipe Fitting 1) Grade:321,304,304L,316,316L,317,317L,310s and etc. 3) Standards: /ASTM/ASME/DIN/JIS and so on. Stainless Steel Pipe Fitting Features:1) pipe diameter : 6mm-630mm pipe thickness : 0.8mm-25mm2) Grade : Grade :321, 304, 304L, 316, 316L, 317, 317L,310s etc3) Standards: /ASTM/ASME/DIN/JIS and etc 4) Applications range: for use in the petroleum, chemical, medical ...