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Spiraldichtung mit Innen- und Außenring, Graphitfüllung, Profil SD10, WS 1.4301/Graphit/St37 beschichtet, Dichtungsdicke 4,9 mm, Rev. 01

Type of gasket: Spiralwound gasket
Gasket manufacturer: IDT Industrie- und Dichtungstechnik GmbH
Gasket label: Spiralwound gasket with inner and outer ring, graphite filler, SD10, WS 1.4301/Graphite/St37 coated, thickness 4,9 mm, Rev. 01
maximum temperature: 400 °C
maximum pressure: 80 bar

Inhaltsverzeichnis

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Gasket thickness under load eG

Gasket thickness eG / mm
Gasket stress / MPa 20°C
20 4.822
30 4.662
40 4.578
50 4.509
60 4.454
80 4.343
100 4.229
120 4.082
140 3.85
160 3.629
180 3.497
200 3.391
220 3.303
240 3.229
260 3.174
280 3.123

Gasket deformation under load ΔeG

Gasket deformation ΔeG / mm
Gasket stress / MPa 20°C
20 0.000
30 0.160
40 0.244
50 0.313
60 0.368
80 0.479
100 0.593
120 0.740
140 0.972
160 1.193
180 1.325
200 1.431
220 1.519
240 1.593
260 1.648
280 1.699

Maximum allowable gasket stress QSmax

Temperature / °C QSmax / MPa
20 280
150 280
300 280
400 280

Modulus of elasticity EG

Modulus of elasticity EG / MPa
Gasket stress / MPa 20°C 150°C 300°C 400°C
20 1737 1778 1725 2766
30 2733 3679 5743 4461
40 4966 3755 5859 8507
50 5278 5391 8419 8828
60 7032 6379 8609 10054
80 8644 8460 11355 14800
100 7987 10002 15646 17420
120 8085 8926 22612 24038
140 8888 8065 20801 20122
160 8428 11575 29200 16987
180 8731 14194 23264 20323
200 10186 18062 24739 21053
220 13232 19254 27062 23516
240 13302 25097 35171 46284
260 19605 25184 40594 38321
280 24562 30256 40993 76682

Creep/relaxation factor PQR

Creep/relaxation factor PQR
Gasket stress / MPa 20°C 150°C 300°C 400°C
50 0.98 0.91 0.85 0.72
130 0.97 0.89 0.82 0.78
200 0.98 0.93 0.89 0.9
280 1 0.98 0.98 0.88

Minimum required gasket stress in assembly Qmin(L)

Minimum required gasket stress Qmin(L) / MPa
Leakage rate / mg/m/s 10 bar 40 bar 80 bar
10⁰ 5 10 20
10⁻¹ 5 10 20
10⁻² 9 20 34
10⁻³ 28 39 84
10⁻⁴ 62 62 109
10⁻⁵ 93 120

Minimum required gasket stress in service QSmin(L) depending on initial gasket stress QA

Minimum required gasket stress at internal pressure 10 bar

Minimum required gasket stress at internal pressure 40 bar

Minimum required gasket stress at internal pressure 80 bar

Friction coefficient µG

The friction coefficient between gasket and flange surface was determined for different types of gasket materials in an ESA research project.

The gasket Spiralwound gasket with inner and outer ring, graphite filler, SD10, WS 1.4301/Graphite/St37 coated, thickness 4,9 mm, Rev. 01 can be assigned to the categorie 3 : "Gaskets based on flexible graphite". Therefore, the following friction coefficients can be considered:

Temperature / °C Friction coefficient
20 °C 0.22