Bolt Hole Spiral Wound Gasket
Ferrobend Bolt Hole Spiral Wound Gaskets are specially designed for heat exchangers, pressure vessels, and custom flange configurations. Bolt holes ensure precise positioning during installation while providing dependable sealing performance under demanding operating conditions.
Product Overview
A made-to-order spiral wound gasket with bolt holes for equipment requiring precise assembly alignment. Geometry, bolt pattern and materials are manufactured to approved customer or OEM drawings.
| Product type | Semi-metallic spiral wound gasket |
|---|---|
| Construction | Custom spiral wound design with integrated bolt holes; ring arrangement to the approved drawing. |
| Standard / design basis | ASME B16.20 where applicable; approved drawing for the custom design |
| Nominal size range | Custom sizes and shapes to approved drawings |
| Pressure classes | Application specific |
| Winding material | Stainless steel and selected alloys; available grades listed below |
| Filler material | Graphite, PTFE and other listed fillers, selected for the service |
| Ring arrangement | Ring geometry specified by the approved drawing |
Standards, Dimensions & Pressure Classes
| ASME B16.20 | Metallic gasket requirements where applicable to the specified custom design. |
|---|---|
| Approved customer / OEM drawing | Controls gasket shape, ring arrangement, bolt pattern and dimensions. |
Sizes & pressure classes
- Nominal sizes
- Custom sizes and shapes to approved drawings
- Pressure classes
- Application specific
- Flange compatibility
- Custom equipment flange geometry and bolt pattern.
For bolt-hole geometry, use the approved equipment drawing. Standard reference dimensions apply only when the specified design follows ASME B16.20.
Technical Specifications
| Sealing element | Precision-formed metallic winding combined with selected soft filler. |
|---|---|
| Bolt pattern | Hole quantity, spacing and diameter manufactured to customer drawings. |
| Ring and gasket geometry | Inner diameter, outer diameter, thickness, shape and ring arrangement to the approved drawing. |
| Pressure capability | Application specific; defined by the approved design and service conditions. |
| Temperature capability | Dependent on the selected winding and filler materials. |
| Sealing performance | Resilience and recovery for custom flange joints under thermal cycling and pressure fluctuations. |
| Custom options | Custom bolt patterns, special shapes, exotic alloys and OEM drawings accepted. |
Temperature, pressure and chemical suitability must be considered together for the selected winding, filler and flange joint. Confirm the required thickness and service limits with the enquiry.
Quality & Testing
| Visual Inspection | Inspection of winding quality, bolt holes, and overall finish |
|---|---|
| Dimensional Verification | Checking bolt pattern, OD, ID, thickness, and specified tolerances |
| Material Identification | Verification of specified winding and filler materials Incoming raw materials are also checked before production. |
| Documentation Review | Confirmation of inspection records and material certificates |
Finished gaskets receive final inspection before dispatch. Material certificates and inspection documentation are available on request.
Downloads & Documents
Browse the existing online guides, or request product-specific documents from our team.
Frequently Asked Questions
Which pressure classes and sizes are available?
The bolt-hole design is made to order. Pressure capability and dimensions are application specific and must be defined on the approved drawing.
Which materials can be supplied?
Choose from the component-specific winding, filler and ring options listed above. Final material selection depends on the process media and service conditions.
Which standards are supported?
ASME B16.20 requirements are followed where applicable. Bolt-hole geometry and the ring arrangement follow the approved customer or OEM drawing.
Can custom sizes and configurations be supplied?
Yes. Hole quantity, spacing, diameter, gasket shape and material combinations can be manufactured to approved drawings.
How should the gasket be installed and stored?
Follow the product-specific positioning and tightening steps above. Keep unused gaskets in their original packaging in a clean, dry location away from moisture, chemicals and direct sunlight. Protect them from bending and heavy loads.
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