Flange

A flange is a critical disc-shaped pipe fitting used to connect pipes,valves,pumps,equipment and other components in a piping system,forming a detachable joint assembly.By bolting two flanges together with a gasket in between,it creates a tight and reliable connection that allows for easy assembly,disassembly,maintenance and replacement of pipeline parts.

Flanges are manufactured in various standard types,including weld neck flanges,slip-on flanges,blind flanges,socket weld flanges,lap joint flanges and threaded flanges,each suitable for different pressure levels,temperatures and media conditions.They are widely made from carbon steel,stainless steel,alloy steel,cast iron and other materials,and strictly comply with international standards such as ASME B16.5,ASME B16.47,DIN,EN,JIS and GB.

The flange connection offers outstanding advantages:high structural strength,excellent sealing performance,strong pressure and temperature resistance,and convenient on-site construction.The matching gaskets—such as spiral wound gaskets,rubber gaskets and metal gaskets—further enhance sealing reliability according to the medium characteristics.Weld neck flanges are commonly used in high-pressure and high-temperature systems,while slip-on and threaded flanges are preferred for medium and low-pressure applications for their cost efficiency and easy installation.

Blind flanges are specially used to temporarily or permanently seal pipeline ends,facilitating system pressure testing and shutdown maintenance.Flanges are indispensable in petroleum,chemical,natural gas transmission,power plants,shipbuilding,municipal water supply and drainage,and various industrial process pipelines.Their stable performance and easy maintainability make flange connections one of the most widely used and reliable connection methods in modern piping systems.