high quality blind flange 1.size:DN15-DN2000 2.material:cs&ss ... 20k,30k,150# to 2500#,PN6-PN40 high quality blind flangesize:DN15-DN2000material:cs&sspressure:5k,10k,16k,20k,30k ... ,150# to 2500#,PN6-PN40high quality blind flange 1.Size:DN15 to DN2000,1/2" to ... ,AS2129,GOST-128204.Types:plate,slip-on,threaded,socket weld,blind flange5.Process:free forging, plate cutting, heat treat, machining6 ...