... 7mm-60mm certificate: ISO9001:2000 Flangestainless welding neck flange 1. Pipe Fittings according to ASTM ... and concentric)d) Flange(plate,slip-on,welding neck,thread,blind) e) Capsf) Bendsg) Cross2. ... ) Seamless: 1/2" to 24 Typestainless welding neck flangeSizefrom 1/2" to 72"Materialcarbon steel,stainless ... 75 ,ASME B16.9 , ASME16.28 , JIS, DIN,GB, SNSIMaterialA234-WPB, A420-WPL6, A234-WP12, A234 ...