... : SS,CS Pressure: PN6,10,16,25,40 GOST Standard Flanges 1.Standard: GOST 12820-80,GOST12821-80 etc.2.Material:Stainless ... -DN20004.Pressure: PN6,10,16,25,405.Type: Plain Welded ,Welding Neck,Blind ,Lap Joint6.Scaling Face: FF,RF,LM,LF ... :50 pieces If you have any need,pls feel free to contact us.