Large Flange

A large diameter flange,also referred to as large size flange,is a heavy-duty pipeline connecting component designed for oversized bore industrial pipe systems.Different from conventional small and medium-sized flanges,it is specially produced for large pipe diameters with wide size ranges,and widely applied in large-scale pipeline engineering.Most large flanges are manufactured with integral forged,plate welded and rolled structures to meet strict strength requirements of heavy engineering projects.

Produced according to international standards including ASME B16.5,ASME B16.47,large flanges cover abundant pressure classes such as Class 150,300,600 and above.Their size scope far exceeds ordinary flanges,adapting to massive large-bore pipeline connections.Common face types include Raised Face(RF),Flat Face(FF)and Ring Type Joint(RTJ).The evenly distributed bolt holes guarantee stable bolting assembly and reliable sealing performance when matched with gaskets and corresponding pipeline equipment.

Main materials include carbon steel,stainless steel,alloy steel and duplex steel.Through professional heat treatment and precision machining,large diameter flanges own excellent structural rigidity,pressure resistance and anti-deformation performance.They can maintain stable operation under high temperature,high pressure and complex outdoor working environments.The optimized structural design reduces internal stress concentration and effectively prevents cracking,deformation and leakage during long-term operation.

Compared with weld neck,slip on,socket weld and threaded flanges,large flanges focus on super-large diameter pipeline connection scenarios.They are extensively adopted in power station main pipelines,petrochemical large-scale transmission pipelines,water conservancy engineering,wind power equipment,large pressure vessels and urban municipal pipeline networks.Customized production is available for special non-standard sizes,thickness and technical requirements.

With solid overall structure,strong load-bearing capacity and long service life,large diameter flanges play an irreplaceable role in heavy industrial pipeline systems.Strict quality inspection on dimensional tolerance,mechanical properties and surface treatment ensures stable sealing and safe operation of large pipe networks.It is a core essential fitting for major large-scale engineering pipeline projects.