ANSI B16.5 3 Inch Stainless Steel Flange , F304 Raised Face SS Weld Neck Flange

ASTM A182 F304 ANSI B16.5 WN RF Class 300 Stainless Steel Weld Neck Raised Face Flange

Product Information

ASTM A182 F304

ASTM A182 F304 is a forging material specification for 304 grade stainless steel and is used for manufacturing bare forgings or gorged and machined products for applications involving high temperature service.

ASTM A182 F304 Chemical Composition (%)

ASTM A182 F304 Mechanical Properties

Flange Type:Weld Neck Flange (WN)

A weld neck flange, also called a tapered hub flange or high-hub flange, is a kind of flange that can relocate stress to the pipes, ensuring a decrease in high-stress concentration at the bottom of the flange. There are two welding neck flanges designs – the first type is used with pipes while the second, longer type cannot be used with pipes but with a process plant. The weld neck flange comprises of a round fitting that extends beyond the rim of the circumference. These flanges, typically manufactured from forging, are actually welded to pipes.

Face Type: Raised Face (RF)

The Raised Face flange is the most common type used in process plant applications, and is easily to identify. It is referred to as a raised face because the gasket surfaces are raised above the bolting circle face. This face type allows the use of a wide combination of gasket designs, including flat ring sheet types and metallic composites such as spiral wound and double jacketed types.

The purpose of a RF flange is to concentrate more pressure on a smaller gasket area and thereby increase the pressure containment capability of the joint. Diameter and height are in ASME B16.5 defined, by pressure class and diameter. Pressure rating of the flange determines the height of the raised face.

ANSI B16.5 Flange Dimensions - Class 300 (mm)