Spiral Wound Gasket

Spiral‑Wound Gaskets for Industrial Flanges: Overview and Value

A spiral‑wound gasket combines a precision‑wound metal strip with a compressible filler. This semi‑metallic design delivers reliable sealing and elastic recovery through thermal and pressure cycling. Built in‑house since 2004 in Cixi, Zhejiang, we support oil and gas, chemical processing, power generation, metallurgy, and general manufacturing with responsive engineering and delivery.

Construction and Materials

✅Winding and filler: Stainless steel or Inconel windings provide strength and corrosion resistance. Graphite‑filled versions suit elevated temperatures and cycling. PTFE‑filled options fit clean service and aggressive media.

✅Rings and compression control: Inner rings protect the bore and stabilize the sealing element. Outer rings aid centering and help manage compression for consistent assembly.

Types and Configurations

✅Basic (winding + filler): Compact choice for well‑aligned flanges and predictable loads.

✅With inner ring: Improved blowout resistance and stability at higher temperature or velocity.

✅With outer ring: Easier centering and more uniform compression across bolt patterns.

✅With inner and outer rings: Maximum stability for demanding or variable conditions.

✅Heat‑exchanger and semi types: Tailored ribs, partitions, and non‑standard forms produced from drawings.

Performance and Specifications

✅Temperature and chemicals: Use graphite‑filled versions for heat and cycling; choose PTFE‑filled options for aggressive media. Materials are matched to process conditions to avoid over‑specification.

✅Pressure and recovery: The semi‑metallic structure maintains sealing stress under vibration and pressure fluctuations, supporting leak‑tight operation over cycles.

✅Sizes and standards: Produced to common EN and ASME flange sizes and pressure classes. Custom diameters and profiles are available from customer drawings.

Applications and Industries

✅Oil and gas: Pipelines, separators, compressors, and associated equipment during start‑ups and shutdowns.

✅Chemical processing and power: Corrosive lines, steam, and condensate systems where material selection is critical.

✅Metallurgy and general manufacturing: Furnaces, reactors, and rotating equipment with tight maintenance windows.

Selection and Sizing Guide

✅Media and temperature: Start here. Graphite‑filled for heat and cycling; PTFE‑filled for clean, aggressive chemistry. Match winding alloy to corrosion and strength needs.

✅Pressure, flange condition, assembly: For higher loads or imperfect flanges, specify ringed configurations (inner and/or outer) to manage compression and positioning.

✅Lifecycle value: Balance safety margins and cost. Our engineers recommend builds that extend service intervals and reduce re‑torque events.

Customization and OEM/ODM Support

✅Drawing‑based builds: Rapid conversion of CAD (DWG/SolidWorks) to production, including partitions and non‑circular geometries.

✅Branding: Private‑label markings for identification and traceability.

✅Turnaround: Urgent sets prioritized for maintenance and shutdown schedules.

Installation and Maintenance Notes

✅Preparation and torque: Clean flange faces and use controlled bolt‑up. Outer rings guide assembly; correct torque achieves designed sealing stress.

✅Recovery advantage: Elastic recovery sustains gasket stress through thermal and pressure changes, reducing leakage risk.

FAQs

✅When should I add an inner ring?
Use an inner ring at higher temperatures, high flow velocity, or when bore protection and blowout resistance are required.

✅Graphite‑filled or PTFE‑filled?
Choose graphite for elevated temperatures and cycling. Select PTFE for clean service and aggressive chemical media.

✅Can you supply non‑standard sizes?
Yes. We produce to EN and ASME standards and manufacture custom sizes and profiles from drawings.

Request a Quote

For application review or lead times,request a quote. Contact our spiral‑wound gasket manufacturer team for technical support and order coordination.