Spiral Wound Gasket Colour Coding & Markings

Spiral Wound Gasket Colour Coding & Markings

Spiral Wound Gasket Material Selection

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SPIRALTEC SPIRAL WOUND GASKETS

Spiraltec, Spiral wound gaskets are manufactured according to ASME B-16.20 standard which stipulates that an inner ring is required for all PTFE filled gaskets and for all class:

* 900# NPS 24 and larger
* 1500# NPS 12 and larger
* 2500# NPS 4 and larger

As of May 2008, the metricated edition of the standard, reccomends the use of inner rings for all Graphite filled spiral wound gaskets. However, these gaskets may be supplied without inner rings per customer request. Both styles will still be stamped ASME B-16.20 compliant on the outer guide ring.

spiraltec_stylewri

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Non-Metallic Fillers – ASME B16.20

Filler Material Max Temperature Abbreviation ASME B16.20 Colour Coding
Graphite 550°C F.G. Grey stripe
PTFE 260°C PTFE White stripe
Verdicarb (MicaGraph) 350°C MICA Pink stripe
Ceramic 1090°C CER Light green

 

Colour Code Chart – ASME B16.20

Material Winding/Plate Max Temperature Abbreviation ASME B16.20 Colour Coding
304 Stainless Steel  540°C 304 Yellow
316L Stainless Steel 800°C 316L Green
321 Stainless Steel 870°C 321 Turquoise
347 Stainless Steel 870°C 347 Blue
Carbon Steel 540°C CRS Silver
Alloy 20 [20Cb-3] 760°C A-20 Black
Hastelloy B-2 1000°C HAST B Brown
Hastelloy C-276 1000°C HAST C Beige
Inconel 600 1000°C INC 600 Gold
Inconel 625 1000°C INCO 625 Gold
Inconel X-750 1000°C INX Light Grey
Inconel 825 1000°C IN 825 White
Monel 400 800°C MON Orange
Nickel 200 600°C NI Red

Other materials available upon request.

SpiralTec_Gasket

 

 

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