15NB ANSI 300 / 600 Ring Face Gasket, 3mm Potable Water EPDM

• Made from high quality EPDM Rubber certified for use in Potable Water sealing applications.
• Cut to size in our Australia facilities and available in the full range of ANSI Standard Sizes (other standards and custom gaskets also available).
• Buy just the quantity you need, no minimum order requirements (great discounts on larger quantities though).

EPDM Rubber Flange Gaskets are often used for sealing water lines and pipes. This variation is made from our Potable Water grade of EPDM Rubber Sheet which meets the requirements of AS/NZS 4020 (2005) Testing of Products for Use in Contact with Drinking Water. It also conforms to the requirements of WSA 109 2011 Table 2.1.

EPDM Rubber Sheet for Potable Water Sealing (Black, 65 Duro)

The rubber these gaskets are made from is our Black, 65 Duro Potable Water Grade EPDM. This is a high quality, industrial-grade EPDM that meets all the requirements of AS/NS 4020 as well as WSA 109 2011 Table 2.1. 

Though most commonly used for sealing in application where the gasket will be exposed to drinking water, this EPDM does exhibit many other characteristics including good chemical resistance, excellent resistant to UV and good physical strength. It has a shore hardness of 65 Duro (±5). Maximum elongation is 350% and tensile strength if 11 MPa.

More information on this rubber can be found on our EPDM Rubber Sheet for Potable Water Sealing Technical Data Sheet.

Potable Water EPDM 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.

Though this page only lists ANSI 300 and/or ANSI 600 Gaskets, we decided to include the size tables for all the main ANSI specs here for comparisons sake. 

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).

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Class 600 Ring Gasket Sizes.

All Dimensions below are given in millimeters (mm).

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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.