... th emost standard and material. FLANGE: WELDING NECK ,SLIP ON ,BLIND ,PLATE,THREADED,LAPPED ,SCREWDE,SOCKET WELDING pressure :PN 6,PN ... ,GALVANIZED ,BLACK. PACKAGE:PLYWOODEN CASE PACKAGE,,WOOD PALLET PACKAGE Remark:GOST 12820:PLATE FLANGEGOST BLIND FLANGEGOST 12821 :WELDING NECK FLANGE STEEL/CS ...