Ningbo Zhonggao Rubber & Plastic Manufacturing Co., Ltd. is one of the most reliable manufacturers and suppliers of pipe flange rubber gaskets in China. The company has world-leading production equipment and strong manufacturing capabilities. Welcome to wholesale custom made pipe flange rubber gaskets from our factory.
Pipe Flange Rubber Gaskets
Custom pipe flange rubber gaskets manufactured to match your flange standard, dimensions, sealing medium, temperature, and pressure requirements. Available in application-specific rubber materials and configurations for industrial piping, pumps, valves, and fluid-handling equipment.
Technical Specifications
Rubber Material Selection
|
Rubber Material |
Key Performance |
|
EPDM |
Water, Ozone & Weather Resistance |
|
NBR |
Oil & Fuel Resistance |
|
FKM |
Heat & Chemical Resistance |
|
CR |
Weather & Aging Resistance |
|
Silicone |
Wide Temperature Capability |
Specifications
|
Parameter |
Options / Reference |
|
Flange Standard |
ASME / ANSI / EN / DIN / JIS / Customer-Specified |
|
Pipe Size |
NPS / DN / Custom |
|
Pressure Class |
Class 150 / Class 300 / PN10 / PN16 / Custom |
|
Flange Face |
Full Face / Raised Face / Ring |
|
Gasket Type |
Full Face / Ring / Custom |
|
Rubber Material |
EPDM / NBR / FKM / CR / Silicone / Customer-Specified |
|
ID |
10–500 mm* |
|
OD |
15–550 mm* |
|
Thickness |
1.5–10 mm* |
|
Hardness |
Shore A 40–90, compound-dependent |
|
Mold Accuracy |
Within ±0.01 mm |
|
Operating Temperature |
EPDM: -50°C to +150°C*; NBR: -40°C to +120°C*; FKM: -20°C to +200°C* |
|
Operating Pressure |
Up to 2.5 MPa for EPDM reference; application-dependent* |
*Actual gasket performance depends on the selected rubber compound, flange design, dimensions, compression, sealing medium, and operating conditions.
Custom Pipe Flange Rubber Gaskets
Custom pipe flange rubber gaskets can be manufactured to match your approved drawing, sample, flange dimensions, material requirements, and operating conditions.
We can produce:
• Custom ID, OD, thickness, and dimensional tolerances
• Full face, ring, and custom flange gasket configurations
• Custom bolt holes, profiles, cutouts, and sealing structures
• NPS, DN, and customer-specified pipe sizes
Rubber material and hardness can be selected according to:
• Sealing medium
• Operating temperature
• Operating pressure
• Flange condition
• Compression and sealing requirements
Available materials include EPDM, NBR, FKM, CR, silicone, and other specified compounds.
Gaskets can be manufactured according to:
• ASME / ANSI
• EN / DIN
• JIS
• Customer-specified flange standards
• Pressure classes such as Class 150, Class 300, PN10, and PN16
Flange drawings or specifications can be reviewed to confirm the gasket configuration and dimensions.
You can provide:
• CAD or technical drawings
• Flange dimensions and tolerances
• Material and hardness requirements
• Existing gasket samples
We can use these details to review specifications and develop the required gasket before mass production.
We support custom:
• Gasket dimensions and configurations
• Material and hardness
• Part numbers and labels
• Packaging requirements
• OEM production based on customer specifications or approved molds
Applications
Pipe flange rubber gaskets are used for static sealing in piping and fluid-handling equipment across different industrial conditions.
- Piping Systems
- Pumps & Valves
- Industrial Equipment
- HVAC Systems
- Automotive & Machinery
Manufacturing
Pipe flange rubber gaskets are manufactured using processes selected according to material, gasket design, dimensions, and production requirements.
The complete manufacturing process is:
Material Preparation → Gasket Forming → Dimensional Control → Finishing
Zhonggao provides custom rubber gasket production with 20 production lines, 20,000+ molds, and monthly capacity of up to 10 million parts, supporting compression molding, injection molding, transfer molding, extrusion, calendering, and die cutting.
Quality Control
Material Inspection
Rubber compound, hardness, and material specifications are checked against approved requirements.
Dimensional Inspection
ID, OD, thickness, bolt holes, and profiles are checked against drawings and tolerances.
Appearance Inspection
Surface defects, edges, flash, cracks, and molding defects are inspected.
Finished Product Inspection
Sealing-related dimensions and physical properties are verified before shipment, with 100% quality inspection for finished parts.
Zhonggao's quality system includes IATF 16949, ISO 9001, ISO 14001, and ISO 45001 certifications.
B2B Order Support
Order terms can be arranged according to the gasket specification, tooling requirements, and order quantity. Zhonggao supports rubber gasket orders from specification review and sampling to mass production and shipment.
- MOQ: Flexible according to gasket size, material, tooling, and production requirements.
- Sample Lead Time: Typically 3–15 days for prototype or sample production.
- Mass Production Lead Time: Typically 10–30 days after specifications and samples are confirmed.
- Order Volume: Prototype, small-batch, and large-volume orders are supported.
- Specification Review: Drawings, samples, dimensions, materials, and operating requirements.
- Sample Approval: Prototype samples can be produced for evaluation before mass production.
- Production: Small-batch and volume orders supported according to confirmed specifications.
- Shipment: Finished gaskets are inspected and prepared according to agreed packaging requirements.
FAQ
Q: How Do I Choose the Right Thickness for a Rubber Flange Gasket?
A: Gasket thickness should be selected according to flange face condition, sealing requirements, compression, pressure, and the applicable flange standard or drawing. Custom thickness can be produced for specific flange configurations.
Q: What Causes Rubber Flange Gaskets to Leak?
A: Common causes include incorrect gasket dimensions, unsuitable material, insufficient or uneven compression, damaged flange faces, improper installation, or operating conditions beyond the gasket's intended range.
Q: Can Rubber Flange Gaskets Be Used for Raised Face Flanges?
A: Yes. Rubber flange gaskets can be manufactured for raised face, full face, ring, and other flange configurations, with dimensions matched to the specific flange design.
Q: How Should Rubber Flange Gaskets Be Stored Before Installation?
A: Store gaskets in a clean, dry environment away from direct sunlight, excessive heat, ozone, oils, and chemicals, and keep them protected from deformation or mechanical damage.
Q: Can You Maintain Consistency for Repeat Rubber Gasket Orders?
A: Yes. Repeat production can be based on approved drawings, samples, material specifications, and production requirements to maintain consistent dimensions, material properties, and gasket configurations across subsequent orders.
Q: What Transport Methods Are Available for Rubber Flange Gaskets?
A: Orders can be shipped by sea, air, express, or other agreed transportation methods according to order quantity, destination, delivery requirements, and customer preference.
Request a Custom Pipe Flange Rubber Gasket Quote
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