Product Overview
High‑Temp Asbestos Gasket Sheet (HT-CAF) is a hot-pressed, compressed asbestos fiber jointing material engineered for sustained service at elevated temperatures. Designed for steam systems, boilers, heat exchangers and other heavy-duty industrial equipment, HT-CAF combines asbestos fiber strength with elastomeric binders to maintain sealability under high temperature and fluctuating flange loads. (Aliases: high-temperature asbestos gasket sheet, HT asbestos sheet, high-temp CAF sheet, asbestos jointing sheet.)
Composition & Manufacturing
What it is made of
HT-CAF is manufactured from long-fiber chrysotile asbestos blended with a heat-resistant binder and compressed under heat and pressure to a dense jointing sheet. Variants may include graphite coating or wire mesh insertion for improved machinability and mechanical strength.
Why this structure helps
The hot-pressed structure gives high compressive strength, predictable creep behaviour and reliable torque retention — critical for repeated thermal cycling in steam and boiler applications.
(For safety/regulatory details see Compliance section below.)
Performance & Limits
-
Nominal thickness range (stock & made-to-order): 0.3 mm – 6.0 mm. Typical stocked thicknesses: 0.5, 0.75, 1.0, 1.5, 2.0, 3.0 mm.
-
Standard sheet sizes (mm): 1270 × 1270 mm, 1500 × 1500 mm, and larger sheets up to 1500 × 4500 mm available from industrial suppliers.
-
Recommended operating temperature (typical ranges): depends on asbestos grade and binder — commonly rated up to ~360–550°C for high-grade CAF variants; verify grade-specific datasheets for precise limits.
-
Service media: saturated & superheated steam, hot water, oils and many hydrocarbon services (chemical compatibility must be checked for strong oxidizers and aggressive acids).
Note: maximum temperature and pressure are application-dependent and must not be assumed concurrently (i.e., higher temperature may reduce allowable pressure). Always request grade datasheet and perform flange/bolt calculations for critical services.
Typical Applications
Typical Applications-
Industrial steam pipelines and boiler flanges
-
Heat exchanger covers and tube sheets
-
Valve bodies, pump casings and compressor flanges
-
High-temperature process vessels in petrochemical & power plants
-
OEM spare gaskets and maintenance kits for industrial plants
Product Specifications
| Item | Specification (typical) |
|---|---|
| Material | Compressed asbestos fiber (chrysotile) + heat-resistant binder (SBR/NBR or specialized) |
| Thickness (stock) | 0.5, 0.75, 1.0, 1.5, 2.0, 3.0 mm (made-to-order 0.3–6.0 mm). |
| Sheet sizes (standard) | 1270×1270 mm; 1500×1500 mm; larger sheets to 1500×4500 mm available. |
| Max. recommended temp (grade dependent) | Typically ~360–550°C for HT grades (confirm grade datasheet). |
| Density | Typically 1.6–2.2 g/cm³ depending on grade and wire insertion. |
| Finish | Plain, graphite coated, wire-inserted or anti-stick treated |
| Packing | Interleaved, film wrapped on pallets; export crates on request |
Common Stock SKUs (example)
-
HTCAF-050-1270 — 0.5 mm × 1270×1270 mm — stock SKU
-
HTCAF-100-1500 — 1.0 mm × 1500×1500 mm — stock SKU
-
HTCAF-150-1500 — 1.5 mm × 1500×1500 mm — stock SKU
-
CUSTOM-DIE — per DXF/CAD drawing (die/tooling charges may apply)
Advantages — Why buy HT-CAF
-
High temperature capability for steam and boiler services.
-
Excellent compressibility and recovery for sealing under thermal cycling.
-
Cost-effective compared with many high-end specialty materials for permitted applications.
-
Good die-cut yield and repeatability — ideal for large OEM runs.
-
Variety of finishes (graphite coating, wire mesh, anti-stick) to matDRch installation needs.
Safety & Regulatory Compliance (must-read)
Important: Asbestos products are strictly regulated or banned in many jurisdictions. Buyers must confirm local legal status before procurement and ensure legal importation, safe handling, and appropriate PPE during installation. Many markets now prefer or mandate non-asbestos alternatives. For up-to-date regulatory context see EU, national bans and recent U.S. regulatory actions.
Comparison Table — HT-Asbestos vs Common Alternatives
| Property | HT-Asbestos (CAF) | Flexible Graphite | Non-Asbestos Compressed (Aramid/NBR) | Ceramic/Mica Millboard |
|---|---|---|---|---|
| Typical max temp | ~360–550°C (grade-dep.). | Up to ~550°C (graphite oxidation limits). | Up to ~400–450°C depending on grade. | Very high — up to 800–1000°C (mica/ceramic). |
| Chemical resistance | Moderate (steam/oils); limited vs strong oxidizers | Excellent for many chemicals | Good broad chemical resistance | Excellent at very high temps |
| Compressibility / recovery | Good | Moderate | Good-very good | Low |
| Die-cut yield | Excellent | Good | Excellent | Lower |
| Regulatory status | Restricted/banned in many countries — check laws. | Widely accepted | Widely accepted | Widely accepted |
| Best when | Traditional steam/boiler repair where permitted | High-temp aggressive chemical service | General replacement for asbestos | Extreme temperature, furnace applications |
Custom & Value-Added Services
-
Die-cut & CNC gasket production from DXF/CAD.
-
Custom thickness blends or graphite coating/anti-stick treatments.
-
Private label packaging, batch traceability and serial LOT numbers.
-
Sample program and technical support (installation guidance, bolt-up torque recommendations).
FAQ
Q1: What is your MOQ?
A1: Typical MOQ for stock sheets is 50–100 sheets per size (1270×1270 or 1500×1500 mm). For custom die-cut runs MOQ depends on tooling and volume — often 500–1,000 pieces for new die setup. (Adjust per your factory capability.)
Q2: Lead times?
A2: Stock orders: 7–15 business days (including palletization). Custom thicknesses or die-cut orders: 2–5 weeks depending on tool setup, quantity and shipping method. Rush options can be quoted.
Q3: Do you ship internationally and handle export documents?
A3: Yes — we ship FOB/CIF/EXW and provide commercial invoice, packing list, COO and MSDS. Be aware of destination import restrictions for asbestos.
Q4: Can you produce die-cut gaskets from our drawings?
A4: Yes — we accept DXF/CAD. Tooling charges may apply; for high-volume repeat orders tooling can be amortized into unit price.
Q5: Are certificates available?
A5: MSDS, composition certificates and batch test reports (where applicable) are available upon request. For steam/critical applications we recommend requesting the specific grade datasheet.
Q6: What packaging do you recommend for sea freight?
A6: Film-wrapped and palletized on plywood pallets or in wooden crates (fumigated if required by destination). For long sea transit, choose crates to reduce moisture ingress.
Q7: Is this material legal in my market?
A7: Regulations vary — many countries ban asbestos entirely (for example the EU banned asbestos in 2005). The U.S. and other jurisdictions have recently updated rules—confirm local law before purchase. We can advise on non-asbestos alternatives if required.
