... Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes and Tubes.ASTM A312 standard covers seamless, straight-seam ... orders and production.1) Material of stainless steel: 201(approx 0.8-1.1% Nickel, 14.5-16% Chromium)202(approx 3 ... , Sanitation, food industry , Petroleum and Gas Industry and Liquird Delivery.6) Surface: 180#, 400#, 600# , 800#, 180# Hairline, 240# ...