Standard Connection Flange

This flange is normally used for nozzles on pressure vessels and rarely used with pipe.  The hub of the flange is straight and thicker than the taper of the weld neck flange (WNF). This flange has a raised face.

abbreviations

• FBF - full barrel flange
• HBF - heavy barrel flange
• LWNF - long weld neck flange

 

Long Weld Neck FlangeHeavy Barrel FlangeFull Barrel Flange

 

 

 

 

 

 

 

 

 

Standard Connection Flange Standards

ASME Standards

• ASME B16.5 - Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard

 

Standard Connection Flange Datasheets

Class	Raised Face	Raised Face	Raised Face
ANSI 150	LWN, ANSI Class 150, B16.5 (in)	HBF, ANSI Class 150, B16.5 (in)	FBF, ANSI Class 150, B16.5 (in)
ANSI 300	LWN, ANSI Class 300, B16.5 (in)
ANSI 400	LWN, ANSI Class 400, B16.5 (in)
ANSI 600	LWN, ANSI Class 600, B16.5 (in)
ANSI 900	LWN, ANSI Class 900, B16.5 (in)
ANSI 1500	LWN, ANSI Class 1500, B16.5 (in)
ANSI 2500	LWN, ANSI Class 2500, B16.5 (in)

 

Standard Connection 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 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