1.factory supply it directly . 2.over 15 years of rich industrial experience 3.reasonable price 4.cooperative and easy-going Standard (could)ASTM A249, A269 and A270, A312 A213Material Grade202 (Ni 3.5%~4.5%),301(Ni 5%)304 (Ni 8%, Cr 18%),316 (Ni 10%, Cr 16%),316L (Ni10%,Cr 16%),430Range of O.D 6mm--159mmThicknessSch5s/ Sch10s/ Sch40s/ Sch80sLength6m or as customers' requestTolerancea) Outer ...