Standrad: GOST 33259-2015
Type: PL/WN/SO/IF/SW/TH/BL/LWN; Flat welded flange, Flat welded flange with neck, hubbed flange, integral type flange, welding neck flange, socket welding flange, threaded flange, PJSE PJ/RJ flange/Butt welded ring loose sleeve flange, STFL STFL PJ flange/RJ/Flat welded ring loose sleeve flange
Material：Titanium, Nickel, Superalloy flange