EN 14917:2021
(Main)Metal bellows expansion joints for pressure applications
Metal bellows expansion joints for pressure applications
This document specifies the requirements for design, manufacture and installation of metal bellows expansion joints with circular cross section for pressure applications with maximum allowable pressure greater than 0,5 bar.
Kompensatoren mit metallischen Bälgen für Druckanwendungen
Dieses Dokument legt Anforderungen an die Konstruktion, Herstellung und den Einbau von Kompensatoren mit metallischen Bälgen mit kreisförmigem Querschnitt für Druckanwendungen mit einem maximal zulässigen Druck über 0,5 bar.
Compensateurs de dilatation à soufflets métalliques pour appareils à pression
La présente Norme européenne spécifie les exigences de conception, de fabrication et d’installation applicables aux compensateurs de dilatation à soufflets métalliques à section transversale circulaire pour des applications sous pression, avec des pressions maximales admissibles supérieures à 0,5 bar.
Kompenzatorji s kovinskimi mehovi v tlačnih cevovodih
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2021
Nadomešča:
SIST EN 14917:2009+A1:2012
Kompenzatorji s kovinskimi mehovi v tlačnih cevovodih
Metal bellows expansion joints for pressure applications
Kompensatoren mit metallischen Bälgen für Druckanwendungen
Compensateurs de dilatation à soufflets métalliques pour appareils à pression
Ta slovenski standard je istoveten z: EN 14917:2021
ICS:
23.040.99 Drugi sestavni deli za Other pipeline components
cevovode
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 14917
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2021
EUROPÄISCHE NORM
ICS 23.040.99 Supersedes EN 14917:2009+A1:2012
English Version
Metal bellows expansion joints for pressure applications
Compensateurs de dilatation à soufflets métalliques Kompensatoren mit metallischen Bälgen für
pour appareils à pression Druckanwendungen
This European Standard was approved by CEN on 21 June 2021.
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 14917:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 7
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 14
4 Classification . 17
4.1 Classification of expansion joints . 17
4.1.1 General . 17
4.1.2 Axial. 17
4.1.3 Angular . 17
4.1.4 Lateral . 17
4.1.5 Universal . 17
4.1.6 Pressure balanced designs (axial or universal) . 17
4.2 Classification of the parts of expansion joints . 20
4.2.1 Main pressure-bearing parts (A) . 20
4.2.2 Pressure parts other than main pressure-bearing parts (B) . 20
4.2.3 Attachments to main pressure-bearing parts and to pressure parts (C) . 20
4.2.4 Other parts (D) . 20
5 Materials . 22
5.1 General . 22
5.1.1 Materials for pressure-bearing parts . 22
5.1.2 Materials for parts attached to pressure-bearing parts. 22
5.1.3 Materials for non-pressure parts . 22
5.2 Pressure-bearing parts . 22
5.2.1 Bellows . 22
5.2.2 Other pressure-bearing parts . 22
5.2.3 Ductility . 23
5.2.4 Brittle fracture . 23
5.3 Material documentation . 27
6 Design . 28
6.1 General . 28
6.1.1 Symbols . 28
6.1.2 Basic design criteria . 34
6.1.3 Allowable stresses . 34
6.1.4 Additional loadings. 37
6.2 Bellows design . 38
6.2.1 Purpose . 38
6.2.2 Conditions of applicability . 38
6.2.3 Design of U-shaped unreinforced bellows . 56
6.2.4 Design of U-shaped reinforced bellows. 72
6.2.5 Design of toroidal bellows . 75
6.2.6 Fatigue . 82
6.2.7 Bellows under the influence of movements . 87
6.2.8 Equivalent axial displacement per corrugation . 92
6.2.9 Forces and moments on pressurized expansion joints . 97
6.2.10 Torsion acting on bellows (unreinforced or reinforced) . 108
6.3 Internal sleeve . 109
6.3.1 Scope . 109
6.3.2 Additional symbols . 109
6.3.3 Flow velocity . 109
6.3.4 Design conditions . 112
6.4 Hardware . 113
6.4.1 General . 113
6.4.2 Design parameters . 113
6.4.3 Hardware parts . 115
6.4.4 Permanent joints . 116
7 Manufacturing. 118
7.1 General . 118
7.2 Materials . 118
7.2.1 General . 118
7.2.2 Material traceability . 118
7.3 Permanent joints . 119
7.3.1 General . 119
7.3.2 Process and personal . 119
7.3.3 Repair and rework during manufacturing . 120
7.4 Forming of the bellows . 120
7.4.1 Forming processes . 120
7.4.2 Heat treatment. 121
7.5 Tolerances . 122
7.5.1 General . 122
7.5.2 Bellows . 122
7.5.3 Expansion joint . 123
7.6 Production tests . 123
8 Testing, inspection and documentation . 124
8.1 General . 124
8.2 Abbreviations . 124
8.3 Documents .
...
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