... Type:Plate Flange,Flat Flange,Slip-on Flange,Welding Neck Flange,Long Welding Neck Flange,Blind Flange,Stocket Welding,Thread Flange,Screwed Flange,Lap Joint Flange.2) ... Standard:ASME B16.9, MSS SP-43 , DIN 2615,JIS B2313 , GB/T12459,GB/T13401,SH3408, SH3409,HG ... /T21635 ,HG ...