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Non-asbestos sheet is a sealing material made by adding special adhesives and a little packing to it, then roll and sulfureted. It is a replacement of asbestos gasket. Non- asbestos gasket has better strength, elasticity and supper strong anti-penetrate performance. And it is product with environment protection material.
DH-T-NAB
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NAS Sheet (Non-Asbestos Aramid Fiber Sheet) is an oil-resistant sealing material made via 3-stage roller calendering. Reinforced with aramid fibers and nitrile rubber, it balances strength and elasticity. Available in standard (2700×3800mm, 1550×4560mm) and custom sizes (API 605/ASME B16.5), with 24-month shelf life (10-25℃, RH <60%).
Thermal Stability: Continuous 250℃ (DIN 53458), short-term 280℃; elastic after 1000h at 250℃.
Pressure Resistance: Up to 2.5MPa (static) and 1.5MPa (low-dynamic), exceeding standard rubber sheets (1.0MPa).
Dimensional Versatility: Thickness 0.3mm-6.0mm; custom sizes up to 5000×6000mm.
Enhancement Options: Wire mesh reinforcement, PTFE anti-adhesive coating, UL 94 V-0 flame-retardant variants.
Sealing Performance: Air tightness ≤1×10⁻⁷ Pa·m³/s (ISO 12747-2:2019), helium-leak-free.
Petrochemical: Crude oil/gasoline/diesel pipeline flanges, offshore platforms (saltwater-resistant).
Mechanical Engineering: Hydraulic reservoirs (32-68 cSt oil), gearbox covers (CNC machines).
Marine: Seawater pipeline joints (corrosion rate <0.1mm/year), engine room seals (IMO MARPOL Annex V).
Power Generation: Steam valve gaskets (180℃, 1.0MPa), nuclear auxiliary cooling water flanges.
Yes. Volume swell <8% (150℃ engine oil) and <10% (120℃ HFO, ASTM D471-16), meeting SH3402-96. Use zinc phosphate-coated variants for high-sulfur fuel (>3.5%).
5-10μm PTFE coating reduces surface energy to 18 mN/m, cutting maintenance time by 40% (6→8.4 months). FDA 21 CFR 177.1550-compliant.
Yes. Max 5000×6000mm, 3-day lead time. MOQ: 10 sheets (<1.0mm), 5 sheets (≥1.0mm). CNC cutting for standard shapes (no extra cost).
Temp max: ° C | 200 | 300 | 400 | 450 |
Pressure max: Mpa | 2.3 | 3.5 | 5 | 6 |
Tensile strength≥Mpa | 9 | 12 | 15 | 19 |
Aging coefficient | 0.9 | 0.9 | 0.9 | 0.9 |
Loss on ignition ≤% | 30 | 30 | 28 | 28 |
Compressibility ≥% | 12±5 | 12±5 | 12±5 | 12±5 |
Recovery ≥% | 40 | 40 | 45 | 45 |
Density g/cm3 | 1.6~2.0 | 1.6~2.0 | 1.6~2.0 | 1.6~2.0 |
Resistance to media | Water, seawater, steam, diluted acid & alkali, gases, alcohols, salt solutions etc. under temperature and pressure. | |||
