National foreword

This Published Document is the UK implementation of CEN/TR 1591‑2:2020. It supersedes BS EN 1591‑2:2008, which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee PSE/15, Flanges.

A list of organizations represented on this committee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This Published Document was published under the authority of the Standards Policy and Strategy Committee on 30 April 2020.

This Technical Report was approved by CEN on 10 February 2020. It has been drawn up by the Technical Committee CEN/TC 74.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

European foreword

This document (CEN/TR 1591‑2:2020) has been prepared by Technical Committee CEN/TC 74 “Flanges and their joints”, the secretariat of which is held by DIN.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 1591‑2:2008.

The major changes in comparison with EN 1591‑2:2008 include:

The introduction of the creep parameter Δe_Gc;
The introduction of the compressed gasket thickness measured during compression phase e_G;
The removal of E_G and e_G results tables for the gasket codes K04, E02, G02, A02, G01, B01 and F01 showing measurement discrepancies.

EN 1591, “Flanges and their joints — Design rules for gasketed flange connections” consists of the following parts:

Part 1: Calculation method
Part 2: Gasket parameters (CEN/TR)
Part 3: Calculation method for metal to metal contact type flanged joint (CEN/TS)
Part 4: Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems Pressure Equipment Directive;
Part 5: Calculation method for full face gasketed joints (CEN/TR).

The data values given in this document were all determined by the test methods given in EN 13555. The data given was obtained during the PERL Project1) during which the test methods of EN 13555 were assessed for practicability and repeatability by the test laboratories at MPA and CETIM (see footnotes 2 and 3 of Table A.1). The materials selected for evaluation during that project were those suggested by the organisations taking part in the PERL project. The materials tested in that project, and therefore the data given in this document, are just a selection of the total range of commercial gasket offerings that are available from the various gasket manufacturers and distributors. The data presented in this document is intended to assist engineers using EN 1591‑1 during their preliminary calculations. Other public sources of reliable data are given in Annex B. In all cases it is expected that engineers will obtain from the manufacturer of their choice the data for the gasket intended to be used in the application in hand. The website of the European Sealing Association, http://www.europeansealing.com/, contains links to their members throughout Europe.

The importance of using the data for the exact style, make and thickness of gasket intended to be used can be seen from the dispersion of the results between gasket makes within a style and thickness in this document.

1 Scope

This document details generic gasket parameters for use in EN 1591‑1 during preliminary calculations during which the type of gasket to be used in an application is to be decided. Once the gasket type has been decided the parameters for gaskets of that type from the different potential commercial suppliers should be used in further calculations as within a gasket type there will be differences depending upon the supplier.

WARNING — — For the final calculations using the method given in EN 1591‑1 the reader is directed to obtain gasket parameters for the selected generic type of gasket from the intended gasket manufacturer. This is because the data for a generic gasket type will vary between manufacturers. This variation can be seen in the tables of data which are embodied in this document.

2 Normative references

3 Terms and definitions

4 Typical gasket parameters for various gasket styles

4.1 General

4.2 Q_min[L], Q_Smin[L]

4.3 Q_smax, P_QRandΔe_Gc

4.4 E_Gand e_G

Bibliography

PD CEN/TR 1591-2:2020

Flanges and their joints. Design rules for gasketed circular flange connections - Gasket parameters

Current

Published:

30 Apr 2020