Expander Flange

An expander flange, abbreviated as EXPF, is similar to a weld neck flange but with the hub expanding to a larger size (one or two sizes).  If you have limited space or just need to connect to a larger pipe size, it provides a convenient way for equipment, pumps and valves.  It can replace the use of a flange and reducer.  Pressure ratings and dimensions are in accordance with ANSI/ASME B16.5. This flange has a raised face.

 

Expander Flange Datasheets

Class	Raised Face
ANSI 150	Expander, ANSI Class 150 (in)
ANSI 300	Expander, ANSI Class 300 (in)
ANSI 600	Expander, ANSI Class 400 (in)

 

Expander Flange Related Articles

• See bleed ring
• See bolt circle
• See bolt tightening procedure
• See flange bolting examples
• See flange facing, ASME B16.5
• See flange safety spray shield
• See flange stamping
• See flex connector
• See gasket
• See general flange standards
• See isolation gasket
• See pipe end
• See raised face smooth finish
• See spectacle blind
• See spiral wound gasket
• See welded end
• See welding to a flange