SS316 spiral wound gaskets are widely used in industrial piping systems that operate under demanding pressure, temperature and chemical conditions. Vishal Rubber Technologies supplies SS316 spiral wound gaskets for process plants, engineering contractors, maintenance teams and equipment manufacturers in Pune.
Unlike a solid rubber gasket, a spiral wound gasket is manufactured by winding alternating layers of formed metal strip and soft filler material. This construction provides mechanical strength, recovery and the ability to accommodate changes caused by pressure and temperature cycling.
Understanding the Gasket Construction
The winding element forms the main sealing section. Stainless steel 316 is commonly selected because it offers useful corrosion resistance in many industrial environments.
The filler is typically selected according to the operating medium and temperature. Common filler materials include graphite and PTFE. Graphite is considered for many high-temperature services, while PTFE may be evaluated where broader chemical compatibility is required within its suitable operating limits.
Depending on the flange arrangement, the gasket may also contain:
- An outer centring ring
- An inner retaining ring
- Both inner and outer rings
- A winding element without additional rings
The inner ring can help limit inward buckling and protect the winding from process flow. The outer ring assists with centring the gasket between flange bolts and helps control compression.
Match the Gasket to the Flange Type
Spiral wound gaskets are commonly used with raised-face and selected tongue-and-groove flange arrangements. Buyers should not select a gasket solely from the nominal pipe size because pressure class and flange standard also affect its dimensions.
Before ordering, confirm:
- Nominal pipe size
- Flange standard
- Pressure class
- Raised-face dimensions
- Requirement for inner and outer rings
- Winding-metal grade
- Filler material
- Operating pressure and temperature
- Process medium
- Required identification markings
A gasket intended for one pressure class may not fit another flange of the same nominal pipe size.
Check Material Compatibility
SS316 offers improved corrosion resistance compared with several general-purpose metals, but it is not universally resistant to every chemical. Chloride concentration, acidity, temperature and moisture can affect its suitability.
The filler must also be compatible with the process medium. For oxygen service, oxidising chemicals and other specialised applications, material selection and cleanliness requirements may be more restrictive.
Engineering approval should be obtained when the pipeline carries hazardous, flammable or highly corrosive media.
Review the Supplier’s Manufacturing Controls
Dimensional accuracy and winding consistency influence how the gasket seats under bolt load. A dependable supplier should be able to work from recognised flange standards, approved drawings and clearly defined material specifications.
Useful evaluation points include:
- Traceability of metal and filler materials
- Dimensional inspection procedures
- Control of winding density
- Ring fit and finish
- Identification and colour coding
- Availability of material documentation
- Packaging that protects gasket edges
- Capability to produce standard and customised sizes
Vishal Rubber Technologies supports industrial buyers seeking standard and application-specific SS316 spiral wound gaskets in Pune and throughout Maharashtra. Complete operating information enables the proposed construction to be reviewed before manufacturing.
Installation Readiness Checks
Flange faces should be clean, parallel and free from serious damage. The gasket must be centred correctly and installed dry unless the approved procedure states otherwise.
Bolts should be inspected and tightened in a controlled cross-pattern. Uneven loading can distort the winding element and create leakage paths. Used spiral wound gaskets should not be reinstalled because the sealing element has already been compressed.
Procurement teams should finalise the flange specification, medium, operating limits and documentation requirements before placing an order. Sharing these details with Vishal Rubber Technologies can help establish the correct gasket construction for the intended pipeline joint.
