Lap Joint Flange: stainless steel flange Lap Joint FlangeType:Slip-On, Welding Neck, Blind, Socket ... , RF, LJ, TG, FM, and R.T.J. etcMaterials:Carbon Steel: ASTM A234WPB,WPC;ASTMA420 WPL9, WPL3, WPL6A; ST 37.2 ... A324 WP1, WP12, WP11,WP22,WP5, WP9,WP91Duplex & Super Duplex Stainless Steel : ASTM A815 UNSS31803,UNS S32750, UNS S32760 Standards:JIS,GB ...