ASME B16.21 · IS 2712 grades · Mumbai, IndiaCAF / Non Asbestos Gaskets
The everyday workhorse for water, steam, oil and chemical lines. Die cut and circle cut from quality jointing sheet as rings, full face and heat exchanger shapes, to standard or to your drawing.
It flows into the flange.
Bolt load makes the compressed fibre sheet yield into the tool marks and imperfections of the flange faces, leaving a continuous barrier with no path for the fluid to escape.
3D renderFibre sheet
Aramid, mineral or carbon fibres bonded with heat-resistant rubber binders and calendered into a uniform sheet.
Flange finish
A serrated or spiral-groove flange finish gives the gasket something to grip and flow into.
Cut to the flange you have.
Standard sizes to ASME B16.21, DIN and IS, and any special shape from your drawing.
Ring gasket
Fits inside the bolt circle of raised face flanges. The most common style.
Raised faceFull face
Covers the whole flange face with bolt holes, for flat face, cast iron and FRP flanges.
Flat faceHeat exchanger
Gaskets with pass partition bars, cut in one piece to your exchanger drawing.
To drawingSpecial shapes
Oval, rectangular, manhole and equipment gaskets, joined in segments for very large sizes.
Any sizeMatch the sheet to the service.
Sheet grade decides the safe temperature and pressure. IS 2712 grades are the familiar reference in India; we cut from standard manufacturers' non-asbestos sheets to match.
IS 2712 grade reference
Typical maximum temperature and pressure
Sheet types
What we cut from
Cut from branded sheet. We die cut and circle cut from standard Indian manufacturers' jointing sheet, so grade and test data are traceable.
Cut, counted, crated.
Real non-asbestos gaskets from our works, from small rings to large full face and exchanger shapes.
See all photos in our gasket gallery →
Shapes no stockist holds.
Cut to your drawing in the grade you specify.
Exchanger shapes
Twin-bore and pass partition gaskets cut in one piece from a single sheet.
Large full face
Large drilled full face gaskets for flat face flanges, ducts and cast iron pipework.
Rectangular & manhole
Rectangular, oval and segmented gaskets for manholes, doors and equipment covers.
Specifications
- Standards
- ASME B16.21, DIN EN 1514-1, IS, or to drawing
- Shapes
- Ring (IBC), full face, heat exchanger, oval, rectangular
- Material
- Compressed non-asbestos fibre sheet; graphite and others on request
- Grades
- Water/steam, oil and acid grades (IS 2712 reference)
- Thickness
- 1.5 mm, 2 mm, 3 mm standard; others on request
- Size
- Small rings to large segmented gaskets
- Cutting
- Die cut and circle cut
- Pressure class
- ASME Class 150 and 300 typical; PN 6 to PN 40
- Inspection
- Third-party inspection by LR, BV, TÜV, SGS and others
Choosing the grade (IS 2712).
From the JaySeal catalogue. The grade is chosen by fluid, temperature and pressure; non-asbestos (CNAF) sheets of matching duty are used today.
IS 2712 grades of compressed fibre jointing
| Grade | Application | Temperature & pressure |
|---|---|---|
| W/1 | Water, steam and some chemicals: high service conditions | Up to 350 °C and 130 bar |
| W/2 | Water, steam and some chemicals: medium service | Up to 350 °C and 40 bar |
| W/3 | Water, steam and some chemicals: low service | Up to 250 °C and 30 bar |
| O/1 | Oils: high service conditions | Up to 350 °C and 130 bar |
| O/2 | Oils: medium and nominal service | Up to 300 °C and 80 bar |
| A/1 | Acids: highly corrosive service | Up to 250 °C and 100 bar |
Gaskets made to ASME B16.21, DIN and IS standards, or to the customer drawing. Limits are for the sheet grade; the joint design and thickness also matter.
gasket vendor
On utility and process lines across India
Non-asbestos gaskets, answered.
What is the full form of CAF gasket?
CAF stands for Compressed Asbestos Fibre. Asbestos-free versions are called CNAF (Compressed Non-Asbestos Fibre) gaskets. Both are cut from compressed fibre jointing sheet to ASME B16.21 or the customer drawing.
What is a CAF or non-asbestos gasket?
A gasket cut from compressed fibre jointing sheet. CAF used asbestos fibre; today's compressed non-asbestos fibre (CNAF) sheets use aramid, mineral or carbon fibres with rubber binders and are used on water, steam, oil and chemical lines.
Which standard covers non-metallic flat gaskets?
ASME B16.21 gives dimensions for non-metallic flat gaskets for ASME pipe flanges. We also cut to DIN EN 1514-1 and IS standards, or to your drawing.
Ring gasket or full face gasket?
Use a ring (IBC) gasket on raised face flanges. Use a full face gasket on flat face flanges, cast iron, FRP or plastic flanges, where the gasket must support the whole face.
How do I choose the right grade?
By fluid, temperature and pressure. The IS 2712 grades (W for water and steam, O for oils, A for acids) are a good guide; tell us your service and we will recommend the sheet.
What do you need to quote CAF / non-asbestos gaskets?
Size or drawing, flange standard and class, shape, thickness, the service conditions or sheet grade, and quantity.
Send your drawing.
Get a price.
Tell us the gasket type, size or drawing, material, pressure class, standard and quantity. Our engineers reply with price and delivery.
Quick enquiry
Replies go straight to our sales team.