... , Chemical, Automobile, Medical Equipment, Boiler Heat-exchanger, Stainless Steel Tube 1) Material: 304, 304L, 310S, 316L, 317L, 321, 347, and ... .5) OD Tolerance: +/-0.15mm6) Thickness: +/-10% of wall thickness7) End Application: Petroleum, Chemical, Automobile, Medical Equipment, Boiler Heat-exchanger,8 ...