15NB Table D & E Ring Face Flange Gasket, 1.5mm Alapin

SKU: SWWA001333
Availability: Cut to Order, Ships in 3-5 W/Days.


All Bulk Prices Below Are Quoted Including GST.
Buy 10 - 24 and pay only $1.20 each
Buy 25 or above and pay only $1.15 each
  • General-Purpose Flange Gaskets for medium temperatures and pressures.
  • Very good compatibility with oils, hydrocarbons, lubricants, fuels, water and steam.
  • Used for sealing steam to 255°C, other media to 340°C.
  • Cut to size in our Australian facilities and available in the full range of standard BS 3063 Table D & Table E Gasket Sizes.

Alapin Flange Gaskets are an economical, versatile solution for sealing many common fluids, gases and media at medium temperatures and pressures. This type of gasket has excellent resistance to oils, lubricants, fuels, water & steam and has a maximum, continuous, temperature rating of 340°C for sealing fluids & gases, 255°C for sealing steam.

The gaskets featured on this page are manufactured in our Australian facilities to suit the size requirements of BS 3063 Table D and/or Table E Flanges. Read on for more information about the different sizes and additional info on Alapin gasket material.

Flange Gaskets to Suit BS 3063 Size Info.

This page lists ring types 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.

The gaskets featured on this page are all cut to suit BS 3063 Flanges in either Table D or Table E configurations (the two most common). In almost all pipe nominal bores (except 150NB, 200NB & 300NB) there’s no difference in gasket size between Table D or Table E (the gasket fits both) when using ring type gaskets.

For those where there is a difference, both Table D and Table E variations are offered separately.

We are pleased to also offer Full Face Alapin Gaskets to suit these same flange specifications. You can browse the full Table D & Table E Full Face Alapin Gasket range here.

Alapin Cut Pipe Flange Gaskets Information.

Alapin is a high quality, industrial-grade compressed non-asbestos fibre (CNAF) gasket material. It is made from a combination of mineral fibres and genuine DuPont Kevlar Aramid Fibres which are bound with a Nitrile Butadiene Rubber (NBR) binder.

The resulting gasket sheet exhibits excellent flexibility, compressibility, sealing performance and recovery. These features, and more, are expanded on below:

Alapin pT Diagram
Green If operating temperatures and pressures fall within this field, a technical examination is normally unnecessary.
Blue For steam sealing applications, a technical evaluation is suggested.
Black If operating temperatures and pressures are within this “open“ field, a technical examination is always necessary.

Good Temperature Resistance.

Like all gasket fibre sheets, the temperature resistance of Alapin is linked to the pressure of the sealing application and the type of media being sealed. That said, a rough guide for this material is:

Maximum Temperature
Continuous, Non-Steam: 340°C.
Short-Term, Non-Steam: 375°C.
Continuous, Sealing Steam: 255°C.

Wide-Ranging Chemical Compatibility.

Alapin Industrial Gasket Material is resistant a wide range of chemicals, fluids and media. The list below is by no means comprehensive, rather just a summary of the most common types of media that Alapin is known to be compatible with:

  • Water.
  • Steam.
  • Oils.
  • Fuel.
  • Kerosene.
  • Salt Solutions.
  • Natural Gas.
  • Lubricants.
  • Refrigerants.
  • Moderate organic and inorganic acids.

Suitable for Medium Sealing Pressures.

Maximum operating pressure is directly linked to the temperature of the application (as illustrated on the above Alapin pT Diagram). The figures below should be considered in this context.

Maximum Pressure
Continuous: 12 MPa (up to about 170°C, less after this temperature is reached).

Excellent Sealing Characteristics.

In addition to its ability to withstand elevated temperatures & pressures, as well as a wide range of fluids and gases, Alapin has excellent sealing characteristics. Some of these are summarised in the table below with more information available on our Alapin Gasket Material Technical Data Sheet.

Density 2 g/cm³
Compressibility 10% (ASTM F 36)
Recovery 55% (ASTM F 36)
Creep Relaxation 20% (ASTM F 38)
Tensile Strength (Across Grain) 12 MPa (DIN 52910)
Thickness Change After Immesion In...
Fuel B - 5 Hours @ 20°C 6% (ASTM F146)
Oil - 5 Hours @ 150°C 6% (IRM 903)
Kerosene - 24 Hours @ 20°C 5% (ASTM F146)

Ring Face Flange Gaskets to suit BS 3063 Table D and Table E Size Info Table.

BS 3063 Table D Alapin CNAF Gaskets Sizing.

All Dimensions below are given in millimeters (mm).

Flange Nominal
Gasket ID Gasket OD Matches
15NB 1/2" 21 52 E
20NB 3/4" 27 59 E
25NB 1" 34 68 E
32NB 1 1/4" 43 73 E
40NB 1 1/2" 48 84 E
50NB 2" 60 97 E
65NB 2 1/2" 76 110 E
80NB 3" 89 129 E
90NB 3 1/2" 102 148 E
100NB 4" 114 160 E
125NB 5" 140 191 E
150NB 6" 168 216 -
200NB 8" 219 273 -
250NB 10" 273 333 E
300NB 12" 324 384 -
350NB 14" 381 444.5 E
400NB 16" 432 495 E
450NB 18" 483 559 E
500NB 20" 533 616 E
600NB 24" 635 728 E

BS 3063 Table E Alapin CNAF Gaskets Sizing.

All Dimensions below are given in millimeters (mm).

Flange Nominal
Gasket ID Gasket OD Matches
15NB 1/2" 21 52 D
20NB 3/4" 27 59 D
25NB 1" 34 68 D
32NB 1 1/4" 43 73 D
40NB 1 1/2" 48 84 D
50NB 2" 60 97 D
65NB 2 1/2" 76 110 D
80NB 3" 89 129 D
90NB 3 1/2" 102 148 D
100NB 4" 114 160 D
125NB 5" 140 191 D
150NB 6" 168 213 -
200NB 8" 219 270 -
250NB 10" 273 333 D
300NB 12" 324 381 -
350NB 14" 381 444.5 D
400NB 16" 432 495 D
450NB 18" 483 559 D
500NB 20" 533 616 D
600NB 24" 635 728 D
Colour Green
Max. Continuous Operating Temperature (non-Steam) 340°C
Max. Intermittent Operating Temperature (non-Steam) 375°C
Max. Continuous Operating Temperature (Steam) 255°C
Base Materials Kevlar Aramid Fibres, Mineral Fibres and an NBR Binder
Maximum Continuous Operating Pressure 12 MPa
Density 2 g/cm³
Compressibility 10% (ASTM F 36)
Recovery 55% (ASTM F 36)
Creep Relaxation 20% (ASTM F 36)
SKU SWP000408