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Wellringdichtung mit Graphitauflage und Innenbördel (1.4571), Profil WD20, WS 1.4571/3803, Dichtungsdicke 3 mm, Rev. 01

Type of gasket: Type SC - metallic gasket with flat or corrugated profile
Gasket manufacturer: IDT Industrie- und Dichtungstechnik GmbH
Gasket label: Wellringdichtung mit Graphitauflage und Innenbördel (1.4571), Profil WD20, WS 1.4571/3803, Dichtungsdicke 3 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 1.649
30 1.539
40 1.488
50 1.45
60 1.423
80 1.378
100 1.347
120 1.318
140 1.293
160 1.272
180 1.255
200 1.239
220 1.22

Gasket deformation under load ΔeG

Gasket deformation ΔeG / mm
Gasket stress / MPa 20°C
20 0.000
30 0.110
40 0.161
50 0.199
60 0.226
80 0.271
100 0.302
120 0.331
140 0.356
160 0.377
180 0.394
200 0.410
220 0.429

Maximum allowable gasket stress QSmax

Temperature / °C QSmax / MPa
20 230
100 160
200 120
300 120
400 100

Modulus of elasticity EG

Modulus of elasticity EG / MPa
Gasket stress / MPa 20°C 100°C 200°C 300°C 400°C
20 896 1462 1089 1141 1091
30 1918 1602 1687 1625 2179
40 2108 1714 1735 1612 1892
50 2478 1970 1963 2146 2544
60 2848 3246 2432 3166 3049
80 3661 2901 3384 3327 3825
100 3868 3482 3131 3401 3245
120 3744 3599 4134 3682
140 4412 5432
160 4650 5893
180 5106
200 6486
220 5918

Creep/relaxation factor PQR

Creep/relaxation factor PQR
Gasket stress / MPa 20°C 100°C 200°C 300°C 400°C
30 0.96 0.84 0.84 0.81 0.83
50 0.98 0.92 0.91 0.89 0.9
80 0.99 0.94 0.95 0.94 0.92
100 0.96
120 0.97 0.97
160 0.99
230 1

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 5 20
10⁻¹ 5 9 20
10⁻² 7 20 25
10⁻³ 18 30 31
10⁻⁴ 28 46 38
10⁻⁵ 45 95 119
10⁻⁶ 72
10⁻⁷ 149

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 Wellringdichtung mit Graphitauflage und Innenbördel (1.4571), Profil WD20, WS 1.4571/3803, Dichtungsdicke 3 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