Non-Asbestos Jointing Sheets KNNY250
Model:KNXB200
KNNY250 is a compressed non-asbestos jointing sheet engineered for water, steam and general pipeline flange service. It is made from a special non-asbestos heat-resistant fiber combined with heat-resistant packing material and a natural rubber binder, consolidated by hot compression molding. Rated to 1.5 MPa working pressure and 200 °C working temperature, KNNY250 delivers higher tensile strength (≥10.0 MPa) and rebound (≥45%) than the lighter KNNY150 grade, while remaining cost-efficient compared with KNNY300 and KNNY350. It is a direct substitution for corresponding asbestos rubber sheet models. Six standard sheet sizes from 1270 × 1270 mm to 4100 × 1500 mm, all available in 0.5–6.0 mm thickness. Standard export packing on wooden pallets of 1000 kg or 2000 kg net. OEM / wholesale pricing from one pallet. Kaxite also supplies the full non-asbestos jointing sheet range from KNNY150 through KNNY350 and KNXB200 through KNXB350.
Kaxite · Non-Asbestos Jointing Sheet · KNNY250
Non-Asbestos Jointing Sheet KNNY250 for Steam, Water and Pipeline Flange Sealing — OEM Bulk Supply
KNNY250 is a compressed non-asbestos jointing sheet engineered for water, steam and general pipeline flange service, rated to 1.5 MPa working pressure and 200 °C working temperature. The sheet is built from a special non-asbestos heat-resistant fiber combined with heat-resistant packing material and a natural rubber binder, then consolidated by hot compression molding into a dense, dimensionally stable sheet.
It is the mid-range grade in the Kaxite non-asbestos jointing sheet line — a step above the lighter KNNY150 while remaining well below the KNNY300 and KNNY350 grades. KNNY250 is specified as a direct substitution for the corresponding asbestos rubber sheet models in water, steam and pipeline joint applications where a full asbestos-free specification is required.
Full Non-Asbestos Jointing Sheet Range Click a grade to view its page
01
Product Overview and Typical Applications
KNNY250 is produced from a special non-asbestos heat-resistant fiber, combined with heat-resistant packing material and a natural rubber compound, and consolidated by hot compression molding. The result is an asbestos-free jointing sheet that behaves like the corresponding asbestos rubber sheet models it replaces — with the same sealing performance envelope in water, steam and general pipeline flange service, without the asbestos content.
It is the grade most commonly specified when a buyer is replacing an existing asbestos sheet but does not need the higher mechanical strength of the KNXB or KNNY300+ grades. Typical applications include:
- Water line flanges — cold and hot water piping flanges, pump connections and water treatment equipment joints where a 1.5 MPa / 200 °C rating is sufficient.
- Steam pipe joints — low and medium pressure steam line flanges on general industrial steam distribution systems.
- General pipeline joints — process piping flanges in refinery, chemical and industrial plant where a mid-range non-asbestos sheet is specified.
- Asbestos sheet substitution — direct replacement for the corresponding asbestos rubber sheet models in existing installations.
- Equipment sealing — gaskets for equipment in water and steam service across general industry.
02
Key Specifications — KNNY250
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- Model
- KNNY250
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- Material
- Non-asbestos heat-resistant fiber + rubber binder
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- Working Pressure
- 1.5 MPa (max)
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- Working Temperature
- 200 °C (max)
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- Tensile Strength
- ≥ 10.0 MPa
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- Density
- 1.6 – 1.8 g/cm³
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- Compressibility
- 12 ± 7 %
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- Rebound Degree
- ≥ 45 %
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- Aging Coefficient
- ≥ 0.9
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- Pliability
- No crack
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- Stress Relaxation
- ≤ 40 %
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- Asbestos Content
- None — 100 % asbestos-free
03
Full Technical Data — Non-Asbestos Jointing Sheet Range
The complete grade-by-grade technical data table for all seven Kaxite non-asbestos jointing sheet models. KNNY250 is highlighted in the table below so buyers can compare its rating against the other grades directly.
| Property | KNXB200 | KNXB300 | KNXB350 | KNNY150 | KNNY250 | KNNY300 | KNNY350 |
|---|---|---|---|---|---|---|---|
| Tensile Strength (MPa) | ≥ 5.0 | ≥ 7.0 | ≥ 11.0 | ≥ 8.0 | ≥ 10.0 | ≥ 12.0 | ≥ 15.0 |
| Aging Coefficient | ≥ 0.9 for all grades | ||||||
| Density (g/cm³) | 1.6 – 2.0 | 1.6 – 1.8 | |||||
| Compressibility (%) | 12 ± 7 for all grades | ||||||
| Rebound Degree (%) | ≥ 35 | ≥ 40 | ≥ 45 | ≥ 40 | ≥ 45 | ≥ 50 | ≥ 50 |
| Pliability | No crack for all grades | ||||||
| Stress Relaxation (%) | ≤ 45 | ≤ 45 | ≤ 45 | ≤ 40 | ≤ 40 | ≤ 30 | ≤ 30 |
| Oil Seal Test (15–30 °C, 75# aviation gasoline, 30 min) | — | — | — | 10 MPa, no leak | 12 MPa, no leak | 15 MPa, no leak | 16 MPa, no leak |
| Tensile Reduction after 150 °C × 5 h in No. 20 Aviation Oil (%) | — | ≤ 40 | ≤ 30 | ≤ 25 | ≤ 25 | ||
| Thickness Increase after Same Oil Test (%) | — | 5 – 20 | 5 – 20 | 5 – 18 | 5 – 18 | ||
| Appearance after Same Oil Test | No bubble for all grades | ||||||
| Tensile after 15–30 °C × 5 h in No. 75 Aviation Gasoline (MPa) | — | ≥ 5 | ≥ 6 | ≥ 8 | ≥ 10 | ||
| Thickness Increase after Same Gasoline Test (%) | — | 5 – 25 | 5 – 25 | 5 – 20 | 5 – 20 | ||
| Pliability after Same Gasoline Test | No crack for all grades | ||||||
Values shown are typical and per Kaxite internal testing standard. Request a batch certificate at the quotation stage if your specification sets fixed limits on any individual property.
04
Available Sheet Sizes and Thicknesses
KNNY250 is supplied in standard commercial sheet sizes and thicknesses. Custom sizes are produced to order for volume requirements.
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- 4100 × 1500 mm
- Thickness 0.5 – 6.0 mm
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- 2000 × 1500 mm
- Thickness 0.5 – 6.0 mm
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- 1500 × 1360 mm
- Thickness 0.5 – 6.0 mm
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- 3810 × 1270 mm
- Thickness 0.5 – 6.0 mm
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- 1270 × 1270 mm
- Thickness 0.5 – 6.0 mm
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- 1500 × 1500 mm
- Thickness 0.5 – 6.0 mm
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- Custom Sizes
- Available on request
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- Standard Packing
- Wooden pallet, ~1000 kg or 2000 kg net
05
Why Buyers Specify KNNY250
Advantage 01 100% asbestos-free
Full substitution for asbestos rubber sheet without the health and regulatory burden of asbestos-containing material.
Advantage 02 Mid-range performance balance
Higher tensile strength and rebound than the KNNY150 grade, while remaining cost-efficient compared with KNNY300 and KNNY350.
Advantage 03 Wide chemistry compatibility
Performs in water, steam, and general pipeline service across the temperature and pressure range the sheet is rated for.
Advantage 04 Full batch traceability
Batch certificates available for tensile strength, density, compressibility and oil-seal test values on request.
Advantage 05 Standard sheet sizes from stock
Six standard sheet sizes from 1270 × 1270 mm through 4100 × 1500 mm, all available in 0.5–6.0 mm thickness range.
Advantage 06 OEM and private-label supply
Custom sheet dimensions, thickness, packaging and private-label marking available for volume orders.
06
Ordering Non-Asbestos Jointing Sheet KNNY250
Send the five details below and Kaxite will confirm availability, price and delivery — typically within one working day for standard sizes.
Step 01 Grade — KNNY250 or specify alternative
Step 02 Sheet size — from standard list or custom
Step 03 Thickness — 0.5 mm to 6.0 mm
Step 04 Quantity (sheets, pallets or kg)
Step 05 Shipping term and destination port
07
Non-Asbestos Jointing Sheet KNNY250 — FAQ
Q 01
What is KNNY250 made from?
KNNY250 is made from a special non-asbestos heat-resistant fiber combined with heat-resistant packing material and a natural rubber compound, then consolidated by hot compression molding into a dense jointing sheet. It contains no asbestos and is a direct substitution for the corresponding asbestos rubber sheet models in water, steam and pipeline joint applications.
Q 02
What is the difference between KNNY250 and the other Kaxite non-asbestos grades?
KNNY250 sits in the middle of the range. It has higher tensile strength and rebound than KNNY150, but lower strength than KNNY300 and KNNY350. Choose KNNY250 when you need a reliable asbestos-free sheet for water, steam and pipeline service at 1.5 MPa / 200 °C, and cost efficiency matters. If your application requires higher mechanical strength or higher pressure-temperature capability, choose KNNY300 or KNNY350.
Q 03
What is the working pressure and temperature of KNNY250?
The rated working pressure is up to 1.5 MPa and the rated working temperature is up to 200 °C. This covers water, low and medium pressure steam, and general pipeline flange sealing service.
Q 04
Which sheet sizes and thicknesses are available?
Six standard sheet sizes: 4100 × 1500 mm, 2000 × 1500 mm, 1500 × 1360 mm, 3810 × 1270 mm, 1270 × 1270 mm and 1500 × 1500 mm. Standard thickness range is 0.5 mm to 6.0 mm. Custom sizes and thicknesses are produced to order for volume requirements.
Q 05
How is the sheet packed?
Standard export packing is on wooden pallets of approximately 1000 kg or 2000 kg net per pallet. Custom packaging and private-label marking are available for volume orders.
Q 06
Is KNNY250 a direct replacement for asbestos rubber sheet?
Yes. KNNY250 is designed as a direct substitution for the corresponding asbestos rubber sheet models in water, steam and general pipeline joint applications. It provides the same sealing function without the health and regulatory burden of asbestos-containing material.
Q 07
Can you supply batch certificates or third-party test reports?
Yes. Batch certificates covering tensile strength, density, compressibility and oil-seal test values are available on request. Third-party test reports from SGS or equivalent are available for volume orders — specify this requirement at the quotation stage.
Q 08
What quantity is required for OEM / wholesale pricing?
OEM and wholesale pricing applies from one pallet (~1000 kg). For regular supply agreements and container-load volumes, we can schedule recurring deliveries and quote tiered pricing. Send the annual or project quantity for volume tier details.
Request a KNNY250 Non-Asbestos Jointing Sheet Quotation
Send the grade, sheet size, thickness, quantity and shipping term. Kaxite supplies KNNY250 and the full range of non-asbestos jointing sheets to industrial buyers worldwide — from a single sheet to container-load volumes. If you are unsure which grade fits your application, send the working pressure, temperature and process media and we will recommend the correct one.
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Contact Info
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Address
No. 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
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Email
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Share your sealing requirement and our technical sales team will respond within 24 business hours. For fastest service, include your flange specification, operating pressure, temperature, and process media in the message below.
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