... welded ,L/R, S/R, 45deg,90deg,180DegMATERIAL : carbon steel,alloy steel,stainless steel, A234 WPB STANDARD:ANSI B16.9/16 ... 3D, 4D, 5D etc.6.All kinds of Flanges, welding neck , slip on , socket weld , threaded, lap joint, blind, spectacle, orifice, ring and ... -XXSSTANDARD: ASME ANSI B16.9, JIS, DINMATERIAL:ASTM A234-WPB, A420-WPL6/L3 etc.; ASTM A234- WP12, WP11, WP15, WP22, WP1, WP5 ...