| Buy 10 - 25 | and pay only $0.85 each |
| Buy 26 - 50 | and pay only $0.81 each |
| Buy 51 - 99 | and pay only $0.77 each |
| Buy 100 or above | and pay only $0.71 each |
Topgraph 2000 Flange Gaskets are often selected for medium to high temperature sealing applications. They are widely used for exhausts, automotive and steam pipe flanges as well as many other situations that require a material capable of maintaining flexibility and sealing performance in elevated temperatures.
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 Topgraph 2000 as a gasket material, and the individual gasket sizes for each standard, ring-face table gasket up to 600NB.
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:
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:
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.
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| 1 | If operating temperatures and pressures fall within this field, a technical examination is normally unnecessary. |
| 2 | If your operating temperatures and pressures are within this field, a technical examination is recommended. |
| 3 | If operating temperatures and pressures are within this “open“ field, a technical examination is always necessary. |
This quality compressed non-asbestos fibre (CNAF) material is made from a combination of graphite and synthetic fibres. It is a specialised grade of gasket paper that is made using a revolutionary process that allows it to offer the flexibility and high temperature sealing performance of graphite with the strength and pressure resistance of synthetic fibres.
Gaskets made from Topgraph 2000 exhibit several performance benefits, some of which are detailed below:
Topgraph 2000 is suitable for use with steam up to 300°C. In many other areas of application, temperatures of over 500°C are possible. Like all gasket materials, maximum operating temperature is related to both sealing pressure and the type of media being sealed.
The pT diagram included on the right gives a rough breakdown of this relationship between pressure and temperature. More information is included on our Topgraph 2000 Technical Data Sheet.
Topgraph 2000 been approved for use with a variety of different media. Some of these certifications and approvals include:
Topgraph 2000 material impresses with its good handling in combination with its very high level of load bearing capacity and minimal embrittlement at temperatures up to 300°C.
These properties offer the gasket a high degree of resistance to damage during fitting and under operation, prevents the loss of bolt load and the formation of cracks at high temperature.
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 | - |
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 | - |
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 | - |
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 | - |
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 | - |
| Colour | Black (Branded on one side) | |
| Compressibility (ASTM F 36 J) | 10% | |
| Recovery (ASTM F 36 J) | 60% | Minimum |
| Stress Relaxation (DIN 52913) | 50 MPa | 50 MPa, 16 hours / 300°C |
| Klinger Cold / Hot Compression (50 MPa) |
10% 10% |
Thickness Decrease at 23°C Thickness Decrease at 300°C |
| Tightness According to DIN 3535/6 | 0.5 ml/min | |
| Density | 1.75 g/cm³ | |
| Soluble Cloride Content | <50ppm | |
| Immersion In Oil JRM 903 5 Hours @ 150°C |
5% 10% |
Thickness Increase Weight Increase |
| Immersion in Fuel B 5 Hours @ 23°C |
7% 10% |
Thickness Increase Weight Increase |
| Immersion in Water 5 Hours @ 100°C |
5% 5% |
Thickness Increase Weight Increase |
| ASME Code Sealing Factors | ||
| Y = 25 MPa M = 4 MPa |
Tightness Class 0.1 mg / s x m | |
For more technical information, please refer to our Klingersil Topgraph 2000 Data Sheet.
| SKU | SWP000417 |
|---|---|
| Brand | Klinger |
