... (WN,SO,Blind) 2 Size:1"-48" 3 Standard:ASTM,GB,DIN,JIS 4 Material:A105, 1 Carbon steel pipe fitting 2 ... (WN,SO,Blind,Lap Joint) 2 Tee,Elbow(45°,90°,180° 3 Reducer 4 Caps Metarial carbon steel ,alloy steel ,stainless steel Sizea)Seamless:1 ... as oil ,chemical industry,water conservancy ,electric power,boiler,machine stainless steel blind flange/B16.5