Metal flue pipe flange

The utility model relates to an air pipe field in the building specifically is a metal flue pipe flange, characterized by: including base plate, connection rivet, connection screw and sealed the pad, the base plate is according to the tuber pipe cross sectional shape and cut to offer the joint -cutting in the base plate four corners, thereby make the base plate inboard form flanging part all around, provide the sealing plate between the two block base boards, by going into to be connected the rivet and connect to the flanging part nail between base plate and the tuber pipe, then be connected by connection screw between base plate and the base plate, thus formation flange structure. The size of this tuber pipe flange structure can be according to the tuber pipe structure and adjust, and the base plate adopts the steel sheet and cuts shapingly through automatic processing equipment, can satisfy the tuber pipe flange requirement of different shapes and specification, and the preparation process of flange is fit