Our flange series includes: Screwed flange, slip-on flange (SO),socket welding flange, lap joint flange (LJF);welding neckflange (WNF), reducing flange, thread flange,blind flange etcRF, MF. ANSI/ASME B 16.5 standard Welding Neck Flange Size: NPS 1/2" 24" standard:ASME,ANSI,DIN,BS,JIS,ISO etc. Facing: RF;FF; RTJ; Welding Neck Flange any enquiry is appreciated.Please contact us yqsanitaryware@hotmail.com AND louisewang0605@yahoo.com.cn