ASME B16.9 STD high pressure carbon steel elbow Size:1/2"-32" Type:seamless Material: ... steel(ASTM A234 WP12,WP11,WP22,WP5,WP9,WP91,ect)High-performance pipeline steelWPHY 42,WPHY 52, WPHY 60, WPHY 65 ... .anti-corrosion and high-temperature resistant with black painting 3.all the production process are made ASME B16.9 STD high pressure carbon steel ...