... .Material:201,304,316L,309S, 4.TIG,PLASMA stainless steel heat exchanger tube (ISO/SGS) 1)ASTM/A312/A554: 201/202/304 ... your requirement.welded stainless steel/stainless steel pipe/stainless steel tube (ISO/SGS) 1.Material: 201, 202, 304,304L, 316,316L ... : 6m or according to customer4. Outside diameter: 14.0mm-159mm5. Wall thickness: 0.5mm-6.0mm6. Tolerance:A. Out diameter:14mm ...