Compressed Non-Asbestos Fiber gaskets manufactured from aramid or other suitable reinforcing fibers combined with elastomeric binders and fillers. Designed for reliable sealing of industrial flanged connections across a broad range of general process applications.
CNAF gaskets, also commonly referred to as compressed fiber gaskets or compressed non-asbestos gaskets, are manufactured from reinforcing fibers, elastomeric binders and functional fillers that are compressed into sheet material.
They are widely used for sealing flanged pipe connections and equipment in general industrial applications where a conformable, economical and reliable gasket material is required.
CNAF gasket material can be selected according to the service media, temperature, pressure, flange facing and required chemical resistance.
Gaskets can be supplied as standard rings or cut to specified dimensions and flange requirements.
Compressed sheet gasket material for industrial flanged connections.
CNAF gaskets can be supplied in different sheet grades, thicknesses and cut configurations according to the application and mating flange.
Full-face CNAF gaskets extend across the complete flange face and include the bolt-hole pattern. They are commonly used with flat-face flange arrangements.
Ring-type CNAF gaskets are cut to the required inside and outside diameters and are commonly used for raised-face flanged connections.
CNAF gasket sheet is available in different thicknesses. The appropriate thickness depends on the flange design, surface condition, operating conditions and project specification.
CNAF sheet formulations vary according to the required chemical resistance, temperature capability, compressibility and sealing characteristics.
| Component | Typical Material | Function |
|---|---|---|
| Reinforcing Fiber | Aramid / Synthetic Fiber | Mechanical Reinforcement |
| Binder | Elastomeric Binder | Binding & Flexibility |
| Fillers | Mineral / Functional Fillers | Sealing & Service Performance |
| Surface | Compressed Sheet | Flange Sealing Surface |
Flat-ring and full-face gasket dimensions for Class 150 and Class 300 flanges.
Swipe horizontally to view every column.
| NPS | dboth(mm) | Dr150(mm) | Dff150(mm) | Dr300(mm) | Dff300(mm) |
|---|---|---|---|---|---|
| ½ | 21.34 | 47.75 | 88.90 | 53.85 | 95.25 |
| ¾ | 26.92 | 57.15 | 98.55 | 66.55 | 117.35 |
| 1 | 33.27 | 66.55 | 107.95 | 73.15 | 123.95 |
| 1 ¼ | 42.16 | 76.20 | 117.60 | 82.55 | 133.35 |
| 1 ½ | 48.51 | 85.85 | 127.00 | 95.25 | 155.45 |
| 2 | 60.45 | 104.65 | 152.40 | 111.25 | 165.10 |
| 2 ½ | 73.15 | 123.95 | 177.80 | 130.05 | 190.50 |
| 3 | 88.90 | 136.65 | 190.50 | 149.35 | 209.55 |
| 3 ½ | 101.60 | 162.05 | 215.90 | 162.05 | 228.60 |
| 4 | 114.30 | 174.75 | 228.60 | 177.80 | 254.00 |
| 5 | 141.22 | 196.85 | 254.00 | 212.85 | 279.40 |
| 6 | 168.15 | 222.25 | 279.40 | 247.65 | 317.50 |
| 8 | 218.95 | 279.40 | 342.90 | 304.80 | 381.00 |
Swipe horizontally to view every column.
| NPS | P150(mm) | n 150 | h150(mm) | P300(mm) | n 300 | h300(mm) |
|---|---|---|---|---|---|---|
| ½ | 60.45 | 4 | 16.00 | 66.55 | 4 | 16.00 |
| ¾ | 69.85 | 4 | 16.00 | 82.55 | 4 | 19.05 |
| 1 | 79.50 | 4 | 16.00 | 88.90 | 4 | 19.05 |
| 1 ¼ | 88.90 | 4 | 16.00 | 98.55 | 4 | 19.05 |
| 1 ½ | 98.55 | 4 | 16.00 | 114.30 | 4 | 22.35 |
| 2 | 120.65 | 4 | 19.05 | 127.00 | 8 | 19.05 |
| 2 ½ | 139.70 | 4 | 19.05 | 149.35 | 8 | 22.35 |
| 3 | 152.40 | 4 | 19.05 | 168.15 | 8 | 22.35 |
| 3 ½ | 177.80 | 8 | 19.05 | 184.15 | 8 | 25.40 |
| 4 | 190.50 | 8 | 19.05 | 200.15 | 8 | 25.40 |
| 5 | 215.90 | 8 | 22.35 | 234.95 | 8 | 25.40 |
| 6 | 241.30 | 8 | 22.35 | 269.75 | 12 | 25.40 |
| 8 | 298.45 | 8 | 22.35 | 330.20 | 12 | 28.45 |
CAF means compressed asbestos fibre; non-asbestos fibre is a separate material. Do not interchange the descriptions.
Order sheet thickness explicitly and confirm cutting dimensions against the mating flange and supplier drawing.
Gasket requirements can be reviewed against the specified material grade, thickness, dimensions, flange standard, facing and service requirements before supply.
Common questions about compressed non-asbestos fiber gaskets, configurations, materials and flange compatibility.
CNAF stands for Compressed Non-Asbestos Fiber. CNAF gaskets are manufactured from reinforcing fibers, elastomeric binders and fillers that are compressed into sheet material and cut into the required gasket shape.
CNAF gaskets use non-asbestos reinforcing materials such as synthetic or aramid fibers instead of asbestos. They are widely used as non-asbestos alternatives for suitable industrial sealing applications.
Yes. CNAF material can be supplied in configurations suitable for different flange arrangements, including ring-type and full-face gaskets. The dimensions should be selected to match the specific flange facing and application.
Provide the NPS, pressure class, flange facing, gasket dimensions or flange standard, required thickness, material grade, service media and quantity. A drawing or existing gasket specification can also be provided for confirmation.
Yes. CNAF gaskets can be included in a mixed piping requirement together with compatible flanges, studs, nuts, washers and other piping components. This allows the complete flange-joint requirement to be sourced together.
Share the NPS, pressure class, flange facing, gasket dimensions, thickness, material grade, quantity and applicable specification. Mixed piping component requirements are also welcome.
