Gasket STANDARDS

ASME Standards

• Nonmetallic gasket dimensions and tolerances in accordance with ASME B16.21 for ASME B16.5 and ASME B16.47 flanges.
• Standard thicknesses are 1/16" and 1/8", but others are available.
• Spiral wound gaskets for ASME B16.5 1/4" to 24" dimensions and tolerances in accordance with ASME B16.20.
• Spiral wound gaskets for ASME B16.47 22" to 60" Series A (MSS SP-44) dimensions and tolerances in accordance with ASME B16.20.
• Spiral wound gaskets for ASME B16.47 26" to 60" Series B (API Std 605) dimensions and tolerances in accordance with ASME B16.20.
• ASME B16.20 - Metallic Gaskets for Pipe Flanges: Ring-Joint, Spiral-Wound, and Jacketed
• ASME B16.21 - Nonmetallic Flat Gaskets for Pipe Flanges
• ASME B16.47 - Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch Standard
• ASME B16.5 - Pipe Flanges and Flanged Fittings: NPS 1/2 through 24

ISO Standards

• ISO 4709 - Composition cork -- Gasket material -- Classification system, requirements, sampling, packaging and marking
• ISO 7483 - Dimensions of gaskets for use with flanges to ISO 700

Blind Flange Sizes - 1/2" through 24"

	Spiral Wound Gaskets ANSI Class 150 Gasket, B16.5 (in) ANSI Class 300 Gasket, B16.5 (in) ANSI Class 400 Gasket, B16.5 (in) ANSI Class 600 Gasket, B16.5 (in) ANSI Class 900 Gasket, B16.5 (in) ANSI Class 1500 Gasket, B16.5 (in) ANSI Class 2500 Gasket, B16.5 (in)		Ring Type Joint ANSI Class 125/150 Ring (in) ANSI Class 250/300 Ring (in) ANSI Class 150-2500, Ring Numbers (in) ANSI Class 150-2500, Ring Dimensions (in)
	Full Face Gaskets Full Face, ANSI Class 125/150 (in) Full Face, ANSI Class 250/300 (in)

Blind Flange Sizes 26" through 60"

Series A ANSI Class 150, B16.47, Series A (in) ANSI Class 300, B16.47, Series A (in) ANSI Class 400, B16.47, Series A (in) ANSI Class 600, B16.47, Series A (in) ANSI Class 900, B16.47, Series A (in)

Series B ANSI Class 75, B16.47, Series B (in) ANSI Class 150, B16.47, Series B (in) ANSI Class 300, B16.47, Series B (in) ANSI Class 400, B16.47, Series B (in) ANSI Class 600, B16.47, Series B (in) ANSI Class 900, B16.47, Series B (in)

Gasket Related Articles

• See creep
• See gasket
• See gasket strainer
• See isolation gasket
• See pipe flange
• See spiral wound gasket