Carbon metal: ASTM/ASME A234 WPB,WPC Alloy steel: ASTM/ASME A234 WP 1-WP 12-WP eleven-WP 22-WP five-WP 91-WP 911 Stainless-steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H Small-temperature metal: ASTM/ASME A402 WPL 3-WPL 6 Higher functionality: ASTM/ASME A860 WPHY 42-46-fifty two-6... https://www.wilsonpipeline.com/product-category/stainlessduplex-steel-pipe.html