Flachdichtung SIGRAFLEX® Hochdruck Pro mit Innen- und Außenbördel, Profil FD30, WS 3888 DB; Dichtungsdicke 2 mm, Rev. 00

3888FD30
SIGRAFLEX® HOCHDRUCKPRO, impregnated with adhesive-free inserts made from 0.05 mm stainless steelfoil 316L; inner and outer eyelet made from stainless steel 1.4571
Article Number
3888FD30
Material
3888
Profile
FD30
FD30
Type of gasket: Type TG - non-metallic flat gasket
Gasket manufacturer: IDT Industrie- und Dichtungstechnik GmbH
Gasket label: Flachdichtung SIGRAFLEX® Hochdruck Pro mit Innen- und Außenbördel, Profil FD30, WS 3888 DB; Dichtungsdicke 2 mm, Rev. 00
maximum temperature: 400 °C
maximum pressure: 80 bar

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Gasket thickness under load eG

Gasket thickness eG / mm
Gasket stress / MPa 20°C 200°C 400°C
0 1.965 1.98 1.97
1 1.861 1.896 1.865
20 1.689 1.705 1.653
30 1.596 1.628 1.591
40 1.542 1.569 1.533
50 1.496 1.535 1.494
60 1.466 1.488 1.454
80 1.403 1.379 1.376
100 1.334 1.323 1.302
120 1.271 1.289 1.255
140 1.243 1.27 1.231
160 1.222 1.252 1.215
180 1.205 1.233 1.196
200 1.189 1.212 1.183

Gasket deformation under load ΔeG

Gasket deformation ΔeG / mm
Gasket stress / MPa 20°C 200°C 400°C
0 0.000 0.000 0.000
1 0.104 0.084 0.105
20 0.276 0.275 0.317
30 0.369 0.352 0.379
40 0.423 0.411 0.437
50 0.469 0.445 0.476
60 0.499 0.492 0.516
80 0.562 0.601 0.594
100 0.631 0.657 0.668
120 0.694 0.691 0.715
140 0.722 0.710 0.739
160 0.743 0.728 0.755
180 0.760 0.747 0.774
200 0.776 0.768 0.787

Maximum allowable gasket stress QSmax

Temperature / °C QSmax / MPa
20 200
200 200
400 200

Modulus of elasticity EG

Modulus of elasticity EG / MPa
Gasket stress / MPa 20°C 200°C 400°C
20 546 775 757
30 816 846 929
40 1224 1170 1123
50 1335 1835 1502
60 1799 1624 1534
80 2691 2713 2068
100 3190 3663 2715
120 4139 3045 3170
140 5247 4507 3405
160 5285 5678 3849
180 5608 5607 4121
200 6035 5496 4553

Creep/relaxation factor PQR

Creep/relaxation factor PQR
Gasket stress / MPa 20°C 200°C 400°C
50 1 0.92 0.96
100 1 0.88 0.91
200 1 0.99
1100 1

Minimum required gasket stress in assembly Qmin(L)

Minimum required gasket stress Qmin(L) / MPa
Leakage rate / mg/m/s 40 bar 80 bar
10⁰ 40 63
10⁻¹ 76 111
10⁻² 112 140
10⁻³ 143 172
10⁻⁴ 179

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

Minimum required gasket stress at internal pressure 40 bar

Minimum required gasket stress QSmin(L) / MPa
Tightness class 80 MPa 100 MPa 120 MPa 150 MPa 200 MPa
10⁰ 30 30 30 30 30
10⁻¹ 59 36 30 30 30
10⁻² 79 45 30
10⁻³ 121 79
10⁻⁴ 145

Minimum required gasket stress at internal pressure 80 bar

Minimum required gasket stress QSmin(L) / MPa
Tightness class 80 MPa 100 MPa 120 MPa 150 MPa 200 MPa
10⁰ 30 30 30 30 30
10⁻¹ 30 30 30
10⁻² 30 30
10⁻³ 30

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 Flachdichtung SIGRAFLEX® Hochdruck Pro mit Innen- und Außenbördel, Profil FD30, WS 3888 DB; Dichtungsdicke 2 mm, Rev. 00 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