EN 1591-1:2013/prA1

Flanges and their joints - Design rules for gasketed circular flange connections - Part 1: Calculation

General information

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CEN/TC 74 Flanges and their joints

European Norm


This European Standard defines a calculation method for bolted, gasketed, circular flange joints. Its purpose is to ensure structural integrity and control of leak tightness. It uses gasket parameters based on definitions and test methods specified in EN 13555.
The calculation method is not applicable to joints with a metallic contact out of the sealing face or to joints whose rigidity varies appreciably across gasket width. For gaskets in incompressible materials, which permit large deformations, the results given by the calculation method can be excessively conservative (i.e. required bolting load too high, allowable pressure of the fluid too low, required flange thickness too large, etc.).

Related legislation

Legislation related to this standard


Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment

Life cycle


EN 1591-1:2013


EN 1591-1:2013/prA1
00.98 Proposal for new project abandoned
Jun 10, 2020