How to find the right Spiral Wound Gaskets AI guide

Written by an AI model from its trained knowledge.

What the AI looks for in Spiral Wound Gaskets

Standard and flange match: Buy to ASME B16.20 for ASME B16.5/B16.47 flanges, matching nominal size and pressure class exactly. The outer centering ring is sized per class. A wrong-class gasket will not center on the bolts.
Inner ring: Specify an inner ring for PTFE-filled gaskets, vacuum service, high-class or large-bore flanges, and corrosive or erosive media. B16.20 requires it in several size and class cases. It prevents windings buckling inward into the bore and limits over-compression.
Filler material: Flexible graphite for high temperature and general service. PTFE for strong oxidizers or where graphite is not allowed, within PTFE's temperature limit. Graphite oxidizes at high temperature in air. PTFE cold-flows and has a lower temperature ceiling.
Winding metallurgy: Match the winding alloy (304, 316L, Alloy 625, etc.) to the process fluid and the flange metallurgy. An incompatible winding corrodes or causes galvanic attack.
Flange finish and bolt load: Use on raised-face flanges with appropriate serrated finish and sufficient bolt stress to seat the gasket. Spiral wounds need high seating stress. They underperform on flat-face, cast iron or light-bolted flanges.

Flexitallic: Originator of the spiral wound gasket, with style CG and CGI variants.
Lamons: Major refinery and petrochemical gasket supplier.
Garlock: Wide industrial sealing range including spiral wounds.
Teadit: Global supplier of metallic and semi-metallic gaskets.

Reusing a compressed spiral wound gasket.
PTFE-filled gaskets without an inner ring.
Spiral wounds on flat-face or cast-iron flanges, where high seating stress can crack the flange.
Unmarked gaskets without B16.20 color coding and material identification on the centering ring.

Under B16.20, the stripe color identifies the winding metal and filler type, so installers can verify material without paperwork.