AD 2000 B7

For GORE Gasket Tape Series 500 in 3 mm thickness and with an internal pressure of 40 bar (580 psi), this results in:

k1  2.5 · bD
k0KD  22 MPa · bD
k0KDϑ 120 MPa · bD temperature ϑ = 230 °C (446 °F)

There are no specific test standards for AD 2000 B 7 Gasket Parameters. However, an estimation is provided below. The 2015 edition of "AD 2000-Merkblatt B 7" refers to EN 13555 as a test standard(1) and uses table 9 from VDI 2200(2) for the conversion method. Please note that VDI 2200 states that such a conversion is invalid due to the different measurement methods. "Only the method according to DIN EN 1591-1 and AD 2000 in conjunction with DIN EN 1591-1 and FE analysis can be used for providing stability, leak tightness and TA Luft proof."(3)

Gore supports the use of the AD 2000-Merkblatt B 7 and provides the necessary gasket parameters below.

There are the following relations(1):

k0KD ≙ Qmin · bD
k1 ≙ (QSmin / p) · bD since m ≙ (QSmin / p)(4)
k0KDϑ ≙ QSmax · bD

Qmin minimum required gasket stress at ambient temperature when the seal is first installed (based on EN 13555)
QSmin minimum required gasket stress in service (based on EN 13555)
QSmax maximum gasket stress that may be applied on the gasket at an indicated temperature ϑ (based on EN 13555)
bD width of the gasket
p internal pressure of the media
k1 AD 2000 B 7 gasket parameter for service condition
k0KD AD 2000 B 7 gasket parameter for gasket deformation
k0KDϑ AD 2000 B 7 gasket parameter for gasket deformation in service at temperature ϑ


If necessary for a specific application, Gore recommends to do individual conversions based on data from EN 13555.

If necessary for a specific application, Gore recommends to do individual conversions based on data from EN 13555.

The use of the general values given in table 1 of AD 2000-Merkblatt B 7(5) is not broadly recommended. However they may be applicable depending on the given situation.

Please also note that the quoted standards of DIN 2690 to DIN 2692 were superseded by EN 1514-1 in 1997.

(1)Arbeitsgemeinschaft Druckbehälter: AD 2000-Merkblatt B 7, Berechnung von Druckbehältern, Schrauben, Seite 4, 7.1.2.4, April 2015.
(2)Verein Deutscher Ingenieure e. V.: VDI 2200, Tight flange connections - Selection, calculation, design and assembly of bolted flange connections, page 36, table 9, June 2007.
(3)Verein Deutscher Ingenieure e. V.: VDI 2290, Emission Control - Sealing constants for flange connections, page 8, June 2012.
(4)Please note that factor m = QSmin / p was defined by DIN V 2505 which was superseded by EN 1591-1 where m is no longer used.
(5)Arbeitsgemeinschaft Druckbehälter: AD 2000-Merkblatt B 7, Berechnung von Druckbehältern, Schrauben, Seite 6, Tabelle 1, April 2015.

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