stainless steel pipe 1) Grade : 321, 304, 304L, 316, 316L, 317, 317L,310s 2) Standards: ... GB/ASTM/ASME/DIN/JIS 3)TPI:SGS,BV 304 welded stainless steel tubes Features:1) pipe diameter : 6mm-630mm pipe ... thickness : 0.8mm-25mm2) Grade : Grade : 301, 321, 304, 304L, 316, ... ,GB/T 13296-91,GB/T 13296-2007 304 wwelded Stainless Steel tubes