15NB ANSI 300 / 600 Ring Face Gasket, 3mm Neoprene Rubber

• Economical type of Neoprene flange gasket for B16.5 Pipe Flanges Flanges.
• Cut to size in our Australian factory to meet the precise requirements of ANSI B16.21 specifications.
• Made from our industrial grade Neoprene rubber. Good resistance to oils, water and many common fluids.
• Available in the full range of standard flange sizes. Custom cut Neoprene ring face gaskets also available upon request.

Neoprene Rubber Flange Gaskets are widely used for sealing pipelines and tanks that operate at low pressure and temperatures.

This versatile, economical rubber material is ideal for these applications as it offers a good combination of economy, performance, reliability and versatility. It is used in sealing applications where temperatures are between -20°C and +100°C.

These gaskets are cut from our industrial grade, 3mm thick Neoprene Rubber Sheet to suit ANSI B16.21 ANSI 300# / 600# flanges (15NB through 600NB).

This is a 60 Duro (±5) Shore A Neoprene Rubber that is black in colour. For more information on it, please consult our Neoprene Rubber Technical Data Sheet or our comprehensive Rubber Chemical Compatibility guide. For more info on the gaskets, read on.

Neoprene Rubber Flange Gaskets to Suit ANSI Size Info.

This page lists ring type gaskets. This style of gasket is designed to sit inside the bolts of the flanges and is known by quite a few names, including:

• RF Flange Gaskets.
• IBC Gaskets (Inner Bolt Circle).
• Raised Face Gaskets (as they are often used on raised face type flanges).
• Ring Face Gaskets.

These gaskets are cut to suit the size requirements of ANSI B16.21 and used with ASME B16.5 Flanges. This specification contains 5 different flange tables listed below:

• ANSI 150 (Class 150)
• ANSI 300 (Class 300)
• ANSI 600 (Class 600)
• ANSI 900 (Class 900)
• ANSI 1500 (Class 1500)

Ii many nominal pipe sizes (NB), the Class 300 and Class 600 call for the same size gasket. The same is true with Class 900 and Class 1500. When this is true, a single gasket is offered that will fit both (denoted on the list as Class 300 / 600). When the specification calls for different size gaskets, individual options for each are listed.

What this means in practice is…

ANSI 150
Does not share it’s sizing with any other flange table at any nominal bore.

ANSI 300
Shares it’s sizing with ANSI 600 up to 80NB (3”). For pipes larger than this, individual gaskets are offered as the sizes differ.

ANSI 600
Shares it’s sizing with ANSI 300 up to 80NB (3”). For pipes larger than this, individual gaskets are offered as the sizes differ.

ANSI 900
Shares it’s sizing with ANSI 1500 up to 65NB (2.5”). For pipes larger than this, individual gaskets are offered as the sizes differ.

ANSI 1500
Shares it’s sizing with ANSI 900 up to 65NB (2.5”). For pipes larger than this, individual gaskets are offered as the sizes differ.

Ring Face Flange Gaskets to suit ANSI B16.5 Flanges Size Tables.

Class 150 Ring Gasket Sizes.

All Dimensions below are given in millimeters (mm).

Return to Sizing Table Menu.

Class 300 Ring Gasket Sizes.

All Dimensions below are given in millimeters (mm).

Return to Sizing Table Menu.

Class 600 Ring Gasket Sizes.

All Dimensions below are given in millimeters (mm).

Return to Sizing Table Menu.

Class 900 Ring Gasket Sizes.

All Dimensions below are given in millimeters (mm).

Return to Sizing Table Menu.

Class 1500 Ring Gasket Sizes.

All Dimensions below are given in millimeters (mm).

Return to Sizing Table Menu.