15NB ANSI 150 Ring Face Flange Gasket, 1.5 mm Alapin

SKU: SWWA002297
Availability: Cut to Order, Ships in 2-3 W/Days.
$0.64
INC. GST
$0.58
EX. GST

BULK DISCOUNT RATES

All Bulk Prices Below Are Quoted Including GST.
Buy 10 - 25 and pay only $0.55 each
Buy 26 - 50 and pay only $0.52 each
Buy 51 - 99 and pay only $0.50 each
Buy 100 or above and pay only $0.48 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 Australia facilities and available in ANSI 150, 300, 600, 900 & 1500 pound sizes as standard.

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.

ANSI B 16.5 Flanges and the associated ANSI B 16.21 Gaskets are widely used in a variety of industries around Australia. The following sections provide more information on the ring gaskets listed on this page, the capabilities of Alapin as a gasket material, and the individual gasket sizes for each standard, ring-face table gasket up to 600NB.

Alapin CNAF 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.

The gaskets featured on this page are all 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.

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 ANSI B16.5 Flanges Size Tables.

ANSI 150 ButtonANSI 300 ButtonANSI 150 ButtonANSI 900 ButtonANSI 1500 Button

Class 150 Ring Gasket Sizes.

All Dimensions below are given in millimeters (mm).

Flange Nominal
Bore
Imperial
Short-Hand
Gasket ID Gasket OD Matches
Table
15NB 1/2" 21 48 -
20NB 3/4" 27 57 -
25NB 1" 33 67 -
32NB 1 1/4" 42 76 -
40NB 1 1/2" 48.4 86 -
50NB 2" 60.3 105 -
65NB 2 1/2" 73 124 -
80NB 3" 89 136.5 -
90NB 3 1/2" 102 162 -
100NB 4" 114.3 175 -
125NB 5" 141.3 197 -
150NB 6" 168 222 -
200NB 8" 219 279 -
250NB 10" 273 340 -
300NB 12" 324 410 -
350NB 14" 356 450 -
400NB 16" 406 515 -
450NB 18" 457 550 -
500NB 20" 508 605 -
600NB 24" 610 715 -

Return to Sizing Table Menu.

Class 300 Ring Gasket Sizes.

All Dimensions below are given in millimeters (mm).

Flange Nominal
Bore
Imperial
Short-Hand
Gasket ID Gasket OD Matches
Table
15NB 1/2" 21 54 ANSI 600
20NB 3/4" 27 67 ANSI 600
25NB 1" 33 73 ANSI 600
32NB 1 1/4" 42 83 ANSI 600
40NB 1 1/2" 48.4 95 ANSI 600
50NB 2" 60.3 111 ANSI 600
65NB 2 1/2" 73 130 ANSI 600
80NB 3" 89 149 ANSI 600
90NB 3 1/2" 102 165 -
100NB 4" 114.3 181 -
125NB 5" 141.3 216 -
150NB 6" 168 251 -
200NB 8" 219 308 -
250NB 10" 273 362 -
300NB 12" 324 422 -
350NB 14" 356 486 -
400NB 16" 406 540 -
450NB 18" 457 597 -
500NB 20" 508 654 -
600NB 24" 610 775 -

Return to Sizing Table Menu.

Class 600 Ring Gasket Sizes.

All Dimensions below are given in millimeters (mm).

Flange Nominal
Bore
Imperial
Short-Hand
Gasket ID Gasket OD Matches
Table
15NB 1/2" 21 54 ANSI 300
20NB 3/4" 27 67 ANSI 300
25NB 1" 33 73 ANSI 300
32NB 1 1/4" 42 83 ANSI 300
40NB 1 1/2" 48.4 95 ANSI 300
50NB 2" 60.3 111 ANSI 300
65NB 2 1/2" 73 130 ANSI 300
80NB 3" 89 149 ANSI 300
90NB 3 1/2" 102 162 -
100NB 4" 114.3 194 -
125NB 5" 141.3 241 -
150NB 6" 168 267 -
200NB 8" 219 320.7 -
250NB 10" 273 400 -
300NB 12" 324 457 -
350NB 14" 356 492 -
400NB 16" 406 565 -
450NB 18" 457 613 -
500NB 20" 508 683 -
600NB 24" 610 791 -

Return to Sizing Table Menu.

Class 900 Ring Gasket Sizes.

All Dimensions below are given in millimeters (mm).

Flange Nominal
Bore
Imperial
Short-Hand
Gasket ID Gasket OD Matches
Table
15NB 1/2" 21 64 ANSI 1500
20NB 3/4" 27 70 ANSI 1500
25NB 1" 33 79 ANSI 1500
32NB 1 1/4" 42 89 ANSI 1500
40NB 1 1/2" 48.4 98 ANSI 1500
50NB 2" 60.3 143 ANSI 1500
65NB 2 1/2" 73 165 ANSI 1500
80NB 3" 89 168 -
90NB 3 1/2" N/A N/A -
100NB 4" 114.3 206 -
125NB 5" 141.3 248 -
150NB 6" 168 289 -
200NB 8" 219 359 -
250NB 10" 273 435 -
300NB 12" 324 498 -
350NB 14" 356 520 -
400NB 16" 406 575 -
450NB 18" 457 638 -
500NB 20" 508 699 -
600NB 24" 610 840 -

Return to Sizing Table Menu.

Class 1500 Ring Gasket Sizes.

All Dimensions below are given in millimeters (mm).

Flange Nominal
Bore
Imperial
Short-Hand
Gasket ID Gasket OD Matches
Table
15NB 1/2" 21 64 ANSI 900
20NB 3/4" 27 70 ANSI 900
25NB 1" 33 79 ANSI 900
32NB 1 1/4" 42 89 ANSI 900
40NB 1 1/2" 48.4 98 ANSI 900
50NB 2" 60.3 143 ANSI 900
65NB 2 1/2" 73 165 ANSI 900
80NB 3" 89 175 -
90NB 3 1/2" N/A N/A -
100NB 4" 114.3 210 -
125NB 5" 141.3 254 -
150NB 6" 168 283 -
200NB 8" 219 352 -
250NB 10" 273 435 -
300NB 12" 324 520 -
350NB 14" 356 580 -
400NB 16" 406 641 -
450NB 18" 457 705 -
500NB 20" 508 755 -
600NB 24" 610 901 -

Return to Sizing Table Menu.

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 SWP000409