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Wellringdichtung mit Graphitauflage, Profil WD10, WS 1.4571/3803, Dichtungsdicke 3 mm, Rev. 03

Type of gasket: Type SC - metallic gasket with flat or corrugated profile
Gasket manufacturer: IDT Industrie- und Dichtungstechnik GmbH
Gasket label: Corrugated metallic gasket with graphite layer, WD10, WS 1.4571/3803, thickness 3 mm, Rev. 03
maximum temperature: 500 °C
maximum pressure: 80 bar

Inhaltsverzeichnis

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Gasket thickness under load eG

Gasket thickness eG / mm
Gasket stress / MPa 20°C 100°C 200°C 300°C 400°C 500°C
0 3 3 3 3 3 3.02
1 2.764 2.721 2.735 2.735 2.727 2.805
20 1.554 1.498 1.492 1.504 1.484 1.5
30 1.483 1.449 1.443 1.456 1.455 1.472
40 1.434 1.409 1.4 1.418 1.41 1.435
50 1.397 1.375 1.37 1.38 1.37 1.399
60 1.365 1.347 1.336 1.346 1.335 1.368
80 1.297 1.295 1.284 1.282 1.261 1.303
100 1.25 1.255 1.237 1.227 1.215
120 1.218 1.224 1.209 1.198 1.19
140 1.198 1.206 1.187 1.179 1.171
160 1.178 1.187 1.168 1.165 1.155
180 1.164 1.171 1.15 1.146 1.139
200 1.15 1.155 1.134 1.132 1.125
220 1.138 1.141 1.118 1.121 1.113

Gasket deformation under load ΔeG

Gasket deformation ΔeG / mm
Gasket stress / MPa 20°C 100°C 200°C 300°C 400°C 500°C
0 0.000 0.000 0.000 0.000 0.000 0.000
1 0.236 0.279 0.265 0.265 0.273 0.215
20 1.446 1.502 1.508 1.496 1.516 1.520
30 1.517 1.551 1.557 1.544 1.545 1.548
40 1.566 1.591 1.600 1.582 1.590 1.585
50 1.603 1.625 1.630 1.620 1.630 1.621
60 1.635 1.653 1.664 1.654 1.665 1.652
80 1.703 1.705 1.716 1.718 1.739 1.717
100 1.750 1.745 1.763 1.773 1.785
120 1.782 1.776 1.791 1.802 1.810
140 1.802 1.794 1.813 1.821 1.829
160 1.822 1.813 1.832 1.835 1.845
180 1.836 1.829 1.850 1.854 1.861
200 1.850 1.845 1.866 1.868 1.875
220 1.862 1.859 1.882 1.879 1.887

Maximum allowable gasket stress QSmax

Temperature / °C QSmax / MPa
20 230
100 230
200 230
300 230
400 230
500 80
600 80

Modulus of elasticity EG

Modulus of elasticity EG / MPa
Gasket stress / MPa 20°C 100°C 200°C 300°C 400°C 500°C
20 1056 966 803 1193 1359 1646
30 1818 1509 1540 1027 2226 2534
40 1399 1697 1867 2515 2013 3678
50 2962 2530 2689 1786 2489 4864
60 2634 2487 2364 4068 3133 5882
80 3311 3223 2988 3891 3250 7774
100 4391 3782 3372 3243 3474
120 5554 5280 5548 5686 5505
140 6905 7985 5169 7355 6086
160 6574 6755 6458 6937 5833
180 6957 6344 6219 6131 5274
200 7070 6107 5543 5603 5691
220 7829 6190 5975 5826 5308

Creep/relaxation factor PQR

Creep/relaxation factor PQR
Gasket stress / MPa 20°C 100°C 200°C 300°C 400°C 500°C 600°C
10 0.955 0.82 0.685 0.69 0.71 0.86 0.77
20 0.95 0.805 0.78 0.79 0.71 0.91 0.91
30 0.965 0.845 0.835 0.815 0.795
40 0.965 0.89 0.87 0.855 0.83
80 0.99 0.95 0.93 0.94 0.915 0.95 0.96
230 1 0.99 0.98 0.97 0.96

Minimum required gasket stress in assembly Qmin(L)

Minimum required gasket stress Qmin(L) / MPa
Leakage rate / mg/m/s 10 bar 25 bar 40 bar 80 bar
10⁰ 5 5 5 20
10⁻¹ 5 6 6 20
10⁻² 5 13 13 25
10⁻³ 13 21 19 35
10⁻⁴ 21 41 30 51
10⁻⁵ 29 76 64 100
10⁻⁶ 93 142 128 155
10⁻⁷ 159

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 25 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 Corrugated metallic gasket with graphite layer, WD10, WS 1.4571/3803, thickness 3 mm, Rev. 03 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