stainless steel pipe 1) Grade : 321, 304, 304L, 316, 316L, 317, 317L ... : GB/ASTM/ASME/DIN/JIS 3)TPI:SGS,BV 304 welded stainless steel tubes Features:1) pipe diameter : 6mm-630mm pipe thickness : 0.8mm ... Standards: /ASTM/ASME/DIN/JIS and etc 4) Applications range: for use in the petroleum, chemical, medical equipment, boiler heat-exchanger ... GB/T 13296-91,GB/T 13296-2007 304 wwelded Stainless Steel tubes