EN 13555:2021

SLOVENSKI STANDARD
01-april-2021
Nadomešča:
SIST EN 13555:2014
Prirobnice in prirobnični spoji - Preskusni postopki in parametri tesnil, ki so
potrebni za konstruiranje prirobničnih spojev, sestavljenih iz okroglih prirobnic in
tesnil
Flanges and their joints - Gasket parameters and test procedures relevant to the design
rules for gasketed circular flange connections
Flansche und ihre Verbindungen - Dichtungskennwerte und Prüfverfahren für die
Anwendung der Regeln für die Auslegung von Flanschverbindungen mit runden
Flanschen und Dichtungen
Brides et leurs assemblages - Paramètres de joints et procédures d'essai relatives aux
règles de calcul des assemblages à brides circulaires avec joint
Ta slovenski standard je istoveten z: EN 13555:2021
ICS:
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
23.040.80 Tesnila za cevne zveze Seals for pipe and hose
assemblies
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 13555
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2021
EUROPÄISCHE NORM
ICS 23.040.60; 23.040.80 Supersedes EN 13555:2014
English Version
Flanges and their joints - Gasket parameters and test
procedures relevant to the design rules for gasketed
circular flange connections
Brides et leurs assemblages - Paramètres de joints et Flansche und ihre Verbindungen - Dichtungskennwerte
procédures d'essai relatives aux règles de calcul des und Prüfverfahren für die Anwendung der Regeln für
assemblages à brides circulaires avec joint die Auslegung von Flanschverbindungen mit runden
Flanschen und Dichtungen
This European Standard was approved by CEN on 27 December 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

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 COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13555:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Symbols . 8
5 List of gasket parameters . 9
6 Test equipment . 10
6.1 Design . 10
6.2 Test platens . 10
6.3 Metal Foils . 10
6.4 Surface finish . 10
6.5 Measurement of gasket thickness . 10
6.6 Loading . 11
6.7 Temperature. 11
6.8 Leakage measurement . 11
7 Test gaskets . 11
7.1 Number of gaskets . 11
7.2 Procurement and identification of gaskets . 11
7.3 Pre-conditioning of the gaskets . 11
7.4 Dimensions of test gaskets . 12
7.5 Measurement of test gaskets as received . 12
7.6 Influence of gasket dimensions . 12
8 Test procedures . 13
8.1 General. 13
8.2 Testing Strategy . 13
8.3 Reference gasket thickness . 13
8.4 Compression curve . 14
8.5 Determination of Q . 14
Smax
8.6 Determination of the values of E . 18
G
8.7 Determination of P and Δe . 20
QR Gc
8.8 Determination of Q and Q . 21
min(L) Smin(L)
8.8.1 General. 21
8.8.2 Leakage diagram . 24
8.9 Determination of Q at elevated temperatures . 24
Smin(L)
8.10 Determination of axial coefficient of thermal expansion . 24
8.11 Determination of the coefficient of static friction . 25
9 Report details . 25
Annex A (informative) Generalized test rig schematic . 26
Annex B (informative) Test rig schematic for compression and compression creep tests . 27
Annex C (informative) Test rig schematic for ambient temperature leakage measurement . 28
Annex D (informative) Schematic of leakage rig allowing use of interchangeable face plate . 29
Annex E (informative) Transferability of measured leakage rates to service conditions . 30
Annex F (informative) The measurement of the sealing parameter Q after long
Smin(L)
term service simulating exposure to elevated temperature . 31
Annex G (informative) Determination of the sealing characteristics of strip sealing
materials available in coil form . 33
Annex H (informative) Proposed method for the determination of the coefficient of static
friction, µ , of gaskets . 34
G
Annex I (informative) Guideline for interpretation of test results and acceptable
modification of measured characteristics . 36
Bibliography . 40

European foreword
This document (EN 13555:2021) has been prepared by Technical Committee CEN/TC 74 “Flanges and
their joints”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2021, and conflicting national standards shall
be withdrawn at the latest by August 2021.
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 13555:2014.
In comparison with the previous edition, the following technical modifications have been made:
a) in Clause 2 the list of normative references has been revised;
b) in Clause 3 the list of definitions has been revised;
c) in Clause 5 the list of gasket parameters has been revised;
d) in 8.5 on the determination of Q has been revised;
Smax
e) a new informative Annex I on the guideline for interpretation of test results and acceptable
modification of measured characteristics has been added.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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 the
United Kingdom.
Introduction
This document provides the test procedures to allow the generation of the gasket parameters to enable
the design formulas established in EN 1591-1 to be employed. The same test procedures may be used
for “Type Testing” of gaskets and gasket materials. These procedures are not for routine quality control
purposes.
1 Scope
This document specifies the gasket parameters required by EN 1591-1 and provides the test
procedures for establishing the values of these parameters.
Gaskets which are wholly based upon elastomers, or based upon elastomers with only the inclusion of
particulate fillers or particulate reinforcement, as opposed to gaskets combining elastomers, fillers and
fibrous reinforcement, are beyond the scope of this document.
NOTE The testing procedures given might be applicable to gaskets of other shapes and dimensions.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1092-1, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 1: Steel flanges
EN 1514-1, Flanges and their joints - Dimensions of gaskets for PN-designated flanges - Part 1: Non-
metallic flat gaskets with or without inserts
EN 1514-2, Flanges and their joints - Gaskets for PN-designated flanges - Part 2: Spiral wound gaskets for
use with steel flanges
EN 1514-3, Flanges and their joints - Dimensions of gaskets for PN-designated flanges - Part 3: Non-
metallic PTFE envelope gaskets
EN 1514-4, Flanges and
...