Spiral Wound Steel Flange Gaskets
A spiral wound gasket is made by winding a V-shaped stainless steel strip together with a graphite or PTFE filler strip in a spiral. The metal winding provides resilience and strength while the filler seals, keeping the gasket seated through temperature and pressure changes.
PN16 models with AISI 316 stainless winding are stocked; inner and outer ring options are by model. They are used on high-pressure steam, thermal oil and thermally cycling process lines in EN 1514-2 and ASME B16.20 dimensions.
Main Applications
- High-pressure steam lines
- Thermal oil circuits
- Thermally cycling process lines
- Boiler and heat exchanger flanges
- Petrochemical and refinery lines
Technical Data
| Winding | Stainless steel AISI 316 |
|---|---|
| Filler | Graphite or PTFE (by model) |
| Rings | Inner and/or outer ring (by model) |
| Pressure class | PN16 (stock) |
| Dimension standard | EN 1514-2, ASME B16.20 |
| Compatible flanges | EN 1092-1 (DIN) and ASME B16.5 |
| Temperature | By filler and winding, per manufacturer datasheet |
Material Options
| Part | Graphite filled | PTFE filled |
|---|---|---|
| Winding | AISI 316 | AISI 316 |
| Filler | Graphite | PTFE |
| Rings | Inner/outer (by model) | Inner/outer (by model) |
| Typical medium | Steam, thermal oil | Chemicals |
Which material? The outer ring centres the gasket in the flange and prevents over-compression, while the inner ring stops the winding from buckling into the flow; double-ring types are preferred at high pressure.
Advantages
Thermal Cycling Resistance
- Metal winding stays resilient
High Pressure
- Steam and thermal oil
Two Fillers
- Graphite or PTFE
Centring
- Easy installation with outer ring
Construction and Design Features
- V-profile AISI 316 winding
- Graphite or PTFE filler strip
- Outer centring ring (by model)
- Inner protection ring (by model)
Write the flange size, pressure class, temperature and filler preference; we will confirm the spiral wound gasket with ring options.
How to Choose?
- Set pressure and temperatureWrite the line operating conditions.
- Choose the fillerUse graphite for steam and PTFE for chemicals.
- Choose the ringsSpecify inner and outer rings at high pressure.
- Confirm the flange standardVerify EN 1092-1 or ASME B16.5 size.
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