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Spiral-wound gasket with PTFE filler, WS 1.4541/7110/St33 coated, Profile SD10, LE, Gasket thickness 5.2 mm, Rev. 01

Type of gasket: Spiralwound gasket
Gasket manufacturer: IDT Industrie- und Dichtungstechnik GmbH
Gasket label: Spiral-wound gasket with PTFE filler, WS 1.4541/7110/St33 coated, IDT style SD10, LE, Gasket thickness 5.2 mm, Rev. 01
maximum temperature: 200 °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
0 5.2 5.2 5.2
1 5.116 5.09 5.133
20 4.667 4.528 4.62
30 4.599 4.506 4.596
40 4.56 4.475 4.562
50 4.526 4.437 4.517
60 4.495 4.402 4.476
80 4.44 4.312 4.37
100 4.391 4.182 4.206
120 4.334 4.081 4.006
140 4.259 3.904 3.874
160 4.09 3.768 3.718
180 3.903 3.571 3.581
200 3.736 3.446 3.504
220 3.572 3.363 3.442
240 3.457 3.295 3.39
260 3.349 3.236
280 3.246 3.198
300 3.148 3.169

Gasket deformation under load ΔeG

Gasket deformation ΔeG / mm
Gasket stress / MPa 20°C 100°C 200°C
0 0.000 0.000 0.000
1 0.084 0.110 0.067
20 0.533 0.672 0.580
30 0.601 0.694 0.604
40 0.640 0.725 0.638
50 0.674 0.763 0.683
60 0.705 0.798 0.724
80 0.760 0.888 0.830
100 0.809 1.018 0.994
120 0.866 1.119 1.194
140 0.941 1.296 1.326
160 1.110 1.432 1.482
180 1.297 1.629 1.619
200 1.464 1.754 1.696
220 1.628 1.837 1.758
240 1.743 1.905 1.810
260 1.851 1.964
280 1.954 2.002
300 2.052 2.031

Maximum allowable gasket stress QSmax

Temperature / °C QSmax / MPa
20 300
100 300
200 240

Modulus of elasticity EG

Modulus of elasticity EG / MPa
Gasket stress / MPa 20°C 100°C 200°C
20 1494 1620 1187
30 3212 5142 2349
40 5262 5746 3881
50 5344 4933 3977
60 5952 6361 4900
80 7722 6580 5280
100 9463 6895 5609
120 9081 7242 6130
140 10641 7308 5799
160 9493 7348 6893
180 8714 8028 7005
200 8370 7488 7421
220 9309 9579 9211
240 9751 9825 10499
260 9477 11092
280 10904 12734
300 11560 15270

Creep/relaxation factor PQR

Creep/relaxation factor PQR
Gasket stress / MPa 20°C 100°C 200°C
30 0.98
40 0.93 0.82 0.79
80 0.94 0.83 0.81
160 0.96 0.85 0.78
240 0.86
300 0.91

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 12 20 11 23
10⁻¹ 14 23 14 27
10⁻² 16 25 18 31
10⁻³ 18 27 23 36
10⁻⁴ 21 29 27 40
10⁻⁵ 38 69 46 86
10⁻⁶ 77 121

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 Spiral-wound gasket with PTFE filler, WS 1.4541/7110/St33 coated, IDT style SD10, LE, Gasket thickness 5.2 mm, Rev. 01 can be assigned to the categorie 2 : "Gaskets based on filled PTFE". Therefore, the following friction coefficients can be considered:

Temperature / °C Friction coefficient
20 °C 0.23