Flange is also known as the flange plate. The flange is a part which is connected between the pipe and the pipe, and is used for the connection between the pipe ends. The flange is also used for the connection between the equipment inlet and outlet for the connection between the two devices, such as the speed reducer flange. Flange connection or flange connection, is defined by the flange, gasket and bolt three are connected as a group of combined sealing structure of the detachable connection. Pipe flange refers to the pipeline installation of piping flange, used in equipment refers to equipment import and export flange. There are two bolt holes on the flange, the flange connect. Gasket seal between flanges. Sub threaded flange connection (threaded connection), flange welding flange and flange clamp. Flanges are used in pairs, low pressure pipe can be used for wire connection flange, four kg or more pressure on the use of welding flange. The two piece of flange plate is provided with a sealing gasket, and then is fixed with a bolt. Different pressure flange thickness, they use the bolt is also different. Pumps and valves, in connection with the pipe, the parts of the equipment, but also made corresponding to the flange shape, also known as the flange connection. Usually in the two plane around the use of bolt connection and close connection parts, generally known as "flange", such as the connection of ventilation ducts, this type of parts can be called "flange parts". But this connection is only a part of the equipment, such as the flange and the water pump connection, it is not good to pump called "flange type parts". Relatively small, such as valves, can be called "flange type parts".

Reducer flange, used for motor and reducer connection, and the connection between the reducer and other equipment.

classification method

According to the chemical industry standard (HG): integral flange (IF), (Th), threaded flange welding plate flange (PL), neck flange (WN), hubbed flange (SO), socket welding flange, butt welding (SW) ring loose flange (PJ/SE), flat huansong (PJ /RJ), flange lining flange (BL (S)), flange (BL).

According to the petrochemical industry standard (SH): (PT), threaded flange welding flange flange (WN), (SO), socket welding flange (SW), loose flange, flange cover (LJ) (not note).

According to the mechanical (JB) industry standard: integral flange, welded flange, welding plate flange, butt welding ring loose plate flange, welding ring loose plate flange, flange ring loose plate flange, flange cover.

According to the national standard (GB): integral flange, threaded flange, flange, butt welding and hubbed flange hubbed socket welding flange, butt welding neck flanges, ring plate flange, butt welding ring loose plate flange, welding ring loose plate flange, flange ring loose plate flange, flange cover.

Texture of material

WCB (Tan Gang), LCB (low temperature Tan Gang), LC3 (3.5%, WC5 (1.25% chromium nickel steel) 0.5%, WC9 (2.25% Cr Mo steel)), C5 (5% Cr 0.5% Mo), C12 (9% Cr 1% mo (4), CA6NM (12%, CA15 steel) (4) (12% CR), CF8M (316, CF8C (stainless steel) 347 stainless steel (304), CF8 CF3 (stainless steel), stainless steel (304L), CF3M 316L CN7M (stainless steel), alloy steel), M35-1 (Meng Naier), N7M (Haast B, CW6M (Ni) Hasta C, nickel alloy Inconel (CY40) etc.).