Carbon Steel piping ASTM A106 ASTM A53 Stainless Steel Piping ASTM A312 Forged Carbon Steel Fittings & Flanges ASTN A105 ASTM A350 Stainless Steel & Alloy ASTM A182 Duplex / Super Duplex Stainless Steel, Alloy Steel (as applicable) ASME Section II Materials Specifications