High-pressure gaskets are designed to maintain reliable seals in systems operating under extreme mechanical load, elevated temperatures and aggressive media. In applications such as steam systems, pressure vessels, pipelines and hydraulic equipment, gasket materials must provide high compressive strength, controlled compressibility and chemical resistance to prevent leakage and maintain flange integrity. A high-pressure gasket is typically rated at 1,200psi pressure resistance or above.
Materials commonly used for high-pressure sealing include flexible graphite, PTFE, compressed fibre and semi-metallic designs such as spiral wound gaskets, selected according to operating pressure, temperature and media compatibility.
High compressibility and thermal stability, widely used in steam systems and high-temperature industrial services.
Outstanding chemical resistance and low friction, ideal for sealing in chemical pipelines, reactors, and food production.
Balanced strength and compressibility, most commonly used in industrial pipework and equipment.
Semi-metallic design provides strong blowout resistance and excellent performance in high-pressure systems.
High-pressure gasket materials are selected based on their ability to maintain sealing integrity under extreme pressure, temperature fluctuations and chemical exposure.
Maximum pressure performance depends on flange design, bolt load, gasket thickness, media and installation conditions. For critical high-pressure systems, gasket specification should always be matched to the exact operating parameters of the application.
| Gasket Type | Temperature Range | Max Pressure | Chemical Resistance |
| Flexible Graphite | -200°C to 450°C | 250 bar (3,600 psi) | Excellent except strong oxidisers |
| Expanded PTFE | -240°C to 260°C | 150 bar (2,200 psi) | Excellent across almost all chemicals |
| CNAF | -50°C to 400°C | 100 bar (1,450 psi) | Good to Very Good, depending on grade |
| Spiral Wound | -200°C to 550°C | 350 bar (5,000 psi) | Excellent, depending on filler |
| Kammprofile | -200°C to 550°C, depending on facing material | 400 bar (5,800 psi) | Excellent, depending on the facing material |
| Metal Jacketed | Up to 750°C, depending on metal jacket | 200 bar (2,900 psi) | Good to Excellent, depending on jacket material |
Dobson Gaskets works with engineers, maintenance teams and procurement specialists to specify and manufacture gasket solutions matched to the exact pressure, temperature and chemical conditions of each application.