Steam & Hot Water Sealing Performance
Steam Exposure
Steam Resistant EPDM Flange Gaskets are formulated for sealing applications involving steam exposure. The selected compound should be matched with steam temperature, pressure, and service duration.
Hot Water Sealing
EPDM maintains its sealing properties in hot-water systems when the material grade is suitable for the operating temperature. The gasket remains compressed between flange faces to maintain contact across the sealing area.
Compression Under Operating Conditions
The gasket thickness and hardness affect how the material compresses between the flange faces. Proper compression helps fill minor surface irregularities without excessive deformation.
Temperature & Pressure Matching
Steam service conditions should be evaluated together with pressure, temperature, flange design, and gasket dimensions. Chaoyue can select the appropriate EPDM specification according to the customer's operating parameters.
Applications of Steam Resistant EPDM Flange Gaskets
- Steam Piping Systems
Used between flanged pipe connections to seal steam lines and reduce leakage at pipe joints under elevated temperature conditions.
- Boilers & Steam Equipment
Applied to flanged connections around boilers, steam generators, and related equipment where hot water or steam passes through the system.
- Hot Water Circulation Systems
Used in hot-water piping, circulation loops, and equipment connections where the gasket is exposed to continuous water flow and elevated temperatures.
- Valves & Pumps
Installed at flanged connections of valves, pumps, and other fluid-handling equipment to maintain sealing between mating flange surfaces.
- Industrial Process Equipment
Suitable for selected industrial equipment and process piping where steam or hot water is used for heating, cleaning, or process control.
Custom Flange Gasket Manufacturing

- Custom Dimensions
Inner diameter, outer diameter, thickness, overall profile, and sealing area can be produced according to the required flange dimensions.
- Flange Hole Patterns
Bolt-hole quantity, diameter, spacing, and positioning can be customized to match the customer's flange connection.
- Material & Hardness
EPDM compound and Shore A hardness can be selected according to steam temperature, pressure, compression requirements, and sealing conditions.
- OEM Production
Chaoyue supports OEM orders with custom tooling, product identification, packaging quantities, and labeling requirements for industrial bulk supply.
FAQ
How do I determine the correct flange gasket size?
The gasket should be selected according to the flange dimensions, including the required inside diameter, outside diameter, thickness, and bolt-hole configuration. A flange drawing or existing gasket sample can be used for size confirmation.
What flange information is needed for a quotation?
Customers can provide the flange standard, nominal size, pressure class, gasket dimensions, material requirement, quantity, and available drawing or sample. This information helps confirm the correct gasket specification.
How should an EPDM flange gasket be positioned during installation?
The gasket should be centered between the mating flange faces, with the sealing area aligned with the flange sealing surface. Uneven positioning can cause localized compression and leakage.

