Our flange series includes: Screwed flange, slip-on flange (SO),socket welding flange, lap joint flange (LJF);welding neckflange (WNF), reducing flange, RF, MF. ANSI/ASME B 16.5 standard Welding Neck Flange Size: NPS 1/2" 24" Facing: RF;FF; RTJ; Welding Neck Flange Mat: ASTM A105/A105N/ASME AS105 ASTM A350LF2 ASTM A182F304F304L F316 F316L   .ANY enquiry is appreciated.Please contact us zhonghaite (at) gmail dot com