When should you use spiral-wound gasket body joint?

Standard ASME B16.5 raised-face flanged joints across the great majority of process piping and valve bonnet connections Services where fugitive-emission-qualified gaskets (per ISO 15848-1 / API 622 testing of the joint) are specified

Sealing & Emission Control Systems

Body / Joint Sealing

Spiral-Wound Gasket Body Joint

A metal winding (usually stainless) interleaved with a soft filler (graphite or PTFE) forms the standard flanged body-joint gasket for process piping and bolted-bonnet valves, combining resilience with pressure/temperature capability well beyond solid elastomer gaskets.

How does spiral-wound gasket body joint work?

The alternating metal and filler windings compress under bolt load to fill flange-face irregularities while the metal winding provides the recovery (spring-back) that keeps the joint sealed through thermal cycling and minor bolt-load relaxation.

When to Use It

Standard ASME B16.5 raised-face flanged joints across the great majority of process piping and valve bonnet connections
Services where fugitive-emission-qualified gaskets (per ISO 15848-1 / API 622 testing of the joint) are specified

Limitations

Correct bolt torque and tightening sequence are essential - under- or over-torqued spiral-wound joints are a common leak source
Requires a compatible filler material (graphite vs PTFE) for the specific fluid and temperature

Typical MaterialsStainless steel winding with flexible graphite or PTFE filler

Used OnGate Valves Globe Valves Ball Valves Butterfly Valves Check Valves