1 Flange (WN,SO,Blind) 2 Size:1"-48" 3 Standard:ASTM,GB,DIN,JIS ... butt welded pipe fitting ProductsPipe fitting 1 Flange (WN,SO,Blind,Lap Joint) 2 Tee,Elbow(45°,90°,180° 3 Reducer ... ,chemical industry,water conservancy ,electric power,boiler,machine stainless steel blind flange/B16.5