Stainless Steel Tube 1) Grade : 321, 304, 304L, 316, 316L, 317, 317L,310s ... ) Standards: GB/ASTM/ASME/DIN/JIS 3) TPI:SGS,BV. Stainless Steel Tube Features:1) pipe diameter : 6mm-630mm pipe thickness : 0.8mm ... third part inspection. 12.capacity:500 ton per month type stainless steel tube size6mm-630mm pipe thickness : 0.8mm-25mmgrade321, 304, 304L, 316 ...