SIST EN 14276-1:2020
(Main)Pressure equipment for refrigerating systems and heat pumps - Part 1: Vessels - General requirements
Pressure equipment for refrigerating systems and heat pumps - Part 1: Vessels - General requirements
This European Standard specifies the requirements for material, design, manufacturing, testing and documentation for stationary pressure vessels intended for use in refrigerating systems and heat pumps. These systems are referenced in this standard as refrigerating systems as defined in EN 378-1.
This European Standard applies to vessels, including welded or brazed attachments up to and including the nozzle flanges, screwed, welded or brazed connectors, or to the edge to be welded or brazed at the first circumferential joint connecting piping or other elements.
This European Standard applies to pressure vessels with an internal pressure down to – 1 bar, to account for the evacuation of the vessel prior to charging with refrigerant.
This European Standard applies to both the mechanical loading conditions and thermal conditions as defined in EN 13445-3 associated with refrigerating systems. It applies to pressure vessels subject to the maximum allowable temperatures for which nominal design stresses for materials are derived using EN 13445-2 and EN 13445-3 or as specified in this standard. In addition, vessels designed to this standard should have a maximum allowable temperature not exceeding 150 °C and a maximum design pressure not exceeding 160 bars. Outside of these limits, it is important that EN 13445 be used for the design, construction and inspection of the vessel. Under these circumstances, it is important that the unique nature of refrigerating plant, as indicated in the introduction to this standard, also be taken into account.
It is important that pressure vessels used in refrigerating systems and heat pumps of category less than II as de-fined in Annex H comply with other relevant clauses of EN 378-2 for vessels.
This European Standard applies to pressure vessels where the main pressure bearing parts are manufactured from metallic ductile materials as defined in Clause 4 and Annex I of this standard.
This European Standard does not apply to vessels of the following types:
- vessels of riveted construction;
- multi-layered, autofrettaged or prestressed vessels;
- vessels directly heated by a flame;
- « roll bond » heat exchangers.
Druckgeräte für Kälteanlagen und Wärmepumpen - Teil 1: Behälter - Allgemeine Anforderungen
Dieses Dokument legt die Anforderungen an Werkstoffe, Konstruktion, Herstellung, Prüfung und Dokumentation für ortsfeste Druckbehälter für Kälteanlagen und Wärmepumpen fest. Diese Anlagen werden im vorliegenden Dokument als Kälteanlagen nach EN 378 1:2016 bezeichnet.
Der Begriff „Kälteanlage“ im vorliegenden Dokument beinhaltet Wärmepumpen.
Dieses Dokument gilt für Behälter mit angeschweißten oder angelöteten Bauteilen, einschließlich Flanschen, Schraub , Schweiß oder Lötverbindungen, oder bis zu der ersten Schweiß oder Lötnaht für den Anschluss von Rohrleitungen oder anderen Teilen.
Dieses Dokument gilt für Druckbehälter mit einem Innendruck bis −1 bar, um der Entleerung des Behälters vor dem Befüllen mit Kältemittel Rechnung zu tragen.
Dieses Dokument gilt sowohl für die mechanischen Belastungen als auch die thermischen Beanspruchungen nach den Festlegungen in EN 13445 3:2014 , die im Zusammenhang mit Kälteanlagen auftreten. Es gilt für Druckbehälter mit den maximal zulässigen Temperaturen, für die die zulässigen Nennspannungen (Berechnungsspannungen) für die Werkstoffe nach EN 13445 2:2014 und EN 13445 3:20141 abgeleitet werden oder in diesem Dokument festgelegt sind. Ferner können Behälter, die nach diesem Dokument ausgelegt sind, eine maximale zulässige Temperatur von 200 °C und einen maximalen Auslegungsdruck von 160 bar aufweisen. Außerhalb dieser Grenzwerte muss für die Konstruktion, Herstellung und Prüfung der Behälter grundsätzlich die Normenreihe EN 13445 herangezogen werden. In diesen Fällen müssen die besonderen Merkmale der Kälteanlage, wie in der Einleitung des vorliegenden Dokuments angegeben, ebenfalls berücksichtigt werden.
Druckbehälter für Kälteanlagen und Wärmepumpen einer Kategorie unter II nach Anhang H müssen den einschlägigen Abschnitten in EN 378 2:2016 für Behälter entsprechen.
Dieses Dokument gilt für Druckbehälter, deren wichtigste drucktragende Teile aus duktilen metallischen Werkstoffen nach den Festlegungen in Abschnitt 4 und Anhang I dieses Dokuments hergestellt sind.
Dieses Dokument gilt nicht für Behälter der folgenden Bauarten:
- Behälter mit Nietverbindungen;
- Mehrlagenbehälter, kaltgereckte (Autofrettage) oder vorgespannte Behälter;
- direkt durch Flammen beheizte Behälter;
- „Roll bond“ Wärmeaustauscher.
Équipements sous pression pour systèmes de réfrigération et pompes à chaleur - Partie 1 : Récipients - Exigences générales
Le présent document spécifie les exigences relatives aux matériaux, à la conception, à la fabrication, aux essais et à la documentation concernant les récipients sous pression fixes destinés à être utilisés dans des systèmes de réfrigération et pompes à chaleur. Ces systèmes sont dénommés dans le présent document, systèmes de réfrigération tels que défini dans l’EN 378-1:2016.
Le terme « système frigorifique » utilisé dans le présent document inclut les pompes à chaleur.
Le présent document s’applique aux récipients comportant les raccords soudés ou brasés y compris les brides de tubulure, les raccords vissés, soudés ou brasés ou d’autre part au bord à souder ou à braser au premier joint circulaire de raccordement à la tuyauterie ou à d’autres éléments.
Le présent document s’applique aux récipients soumis à une pression intérieure jusqu’à -1 bar nécessaire pour réaliser la vidange du récipient avant de charger le fluide frigorigène.
Le présent document concerne les conditions de chargement mécanique et les conditions thermiques telles que définies dans l’EN 13445-3:2014 1 associées aux systèmes de réfrigération. Il s’applique aux récipients sous pression soumis aux températures maximales admissibles pour lesquelles sont induites les contraintes nominales de calcul en utilisant l'EN 13445-2:2014 2 et l'EN 13445-3:2014 1 ou telles que spécifiées dans le présent document. En outre, les récipients conçus conformément au présent document ont une température maximale admissible n’excédant pas 200 °C et une pression maximale de conception n’excédant pas 160 bar. En dehors de ces limites, la série de normes EN 13445 est utilisée pour la conception, la construction et l’inspection du récipient. Dans ces circonstances, la nature particulière de l’installation de réfrigération, tel qu’indiqué dans l’introduction du présent document, doit également être prise en compte.
Il est important que les récipients sous pression, utilisés dans les systèmes de réfrigération et pompes à chaleur de catégorie inférieure à la catégorie II, comme définis à l’Annexe H soient conformes aux autres articles pertinents de l’EN 378-2:2016 concernant les récipients.
Le présent document s’applique aux récipients dont les parties principales sous pression sont fabriquées en matériaux métalliques ductiles tels que définis à l’Article 4 et à l’Annexe I du présent document.
Le présent document ne s’applique pas aux récipients des types suivants :
- les récipients rivés ;
- les récipients multicouches, auto frettés ou précontraints ;
- les récipients directement soumis à l’action de la flamme ;
- les échangeurs de chaleur de type « roll bond ».
1 En considération des EN 13445-3:2014/A1:2015, EN 13445-3:2014/A2:2016, EN 13445-3:2014/A3:2017, EN 13445-3:2014/A4:2018 et EN 13445-3:2014/A5:2018.
2 En considération des EN 13445-2:2014/A1:2016, EN 13445-2:2014/A2:2018 et EN 13445-2:2014/A3:2018.
Tlačna oprema za hladilne sisteme in toplotne črpalke - 1. del: Posode - Splošne zahteve
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 14276-1:2020
01-maj-2020
Nadomešča:
SIST EN 14276-1:2007+A1:2011
Tlačna oprema za hladilne sisteme in toplotne črpalke - 1. del: Posode - Splošne
zahteve
Pressure equipment for refrigerating systems and heat pumps - Part 1: Vessels -
General requirements
Druckgeräte für Kälteanlagen und Wärmepumpen - Teil 1: Behälter - Allgemeine
Anforderungen
Équipements sous pression pour systèmes de réfrigération et pompes à chaleur - Partie
1 : Récipients - Exigences générales
Ta slovenski standard je istoveten z: EN 14276-1:2020
ICS:
23.020.32 Tlačne posode Pressure vessels
27.080 Toplotne črpalke Heat pumps
27.200 Hladilna tehnologija Refrigerating technology
SIST EN 14276-1:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 14276-1:2020
---------------------- Page: 2 ----------------------
SIST EN 14276-1:2020
EN 14276-1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 23.020.30; 27.080; 27.200 Supersedes EN 14276-1:2006+A1:2011
English Version
Pressure equipment for refrigerating systems and heat
pumps - Part 1: Vessels - General requirements
Équipements sous pression pour systèmes de Druckgeräte für Kälteanlagen und Wärmepumpen -
réfrigération et pompes à chaleur - Partie 1 : Récipients Teil 1: Behälter - Allgemeine Anforderungen
- Exigences générales
This European Standard was approved by CEN on 1 December 2019.
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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14276-1:2020 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 14276-1:2020
EN 14276-1:2020 (E)
Contents Page
European foreword . 8
Introduction . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 14
3.1 Terms and definitions . 14
3.2 Symbols, descriptions and units . 17
4 Materials . 20
4.1 General . 20
4.2 Requirements for materials to be used for pressurized parts . 20
4.3 Requirements for materials . 20
4.3.1 General . 20
4.3.2 Cladding . 21
4.3.3 Special considerations . 21
4.4 Requirements for prevention of brittle fracture . 22
4.4.1 General . 22
4.4.2 Material requirements . 23
4.5 Material documentation . 23
4.6 Materials for non-pressure retaining parts . 23
5 Pressure vessel classification . 23
5.1 Category of vessel . 23
5.2 Fluid classification . 24
6 Design . 25
6.1 General . 25
6.2 Corrosion and corrosion protection . 25
6.2.1 General . 25
6.2.2 Internal corrosion . 25
6.2.3 External corrosion . 25
6.2.4 Corrosion allowance information . 25
6.3 Stress corrosion cracking . 26
6.4 Loading. 26
6.5 Maximum allowable pressure PS . 26
6.6 Design pressure P . 26
d
6.7 Calculation pressure P or P . 27
c
6.8 Design temperature t . 27
d
6.9 Minimum material temperature . 27
6.10 Calculation temperature t . 27
c
6.10.1 General . 27
6.10.2 Vessel without heater . 27
6.10.3 Vessel with heater . 28
6.11 Joint coefficient . 28
6.12 Design stress . 30
2
---------------------- Page: 4 ----------------------
SIST EN 14276-1:2020
EN 14276-1:2020 (E)
6.13 Access and inspection openings, venting and draining provisions, filling and
discharge provisions and handling devices . 32
6.13.1 Non corrosive fluids . 32
6.13.2 Corrosive fluids . 32
6.13.3 Venting and draining provisions . 32
6.13.4 Filling and discharge provision . 32
6.13.5 Handling devices . 32
6.14 Methods for design . 33
6.14.1 General . 33
6.14.2 Design by formulas (DBF) . 33
6.14.3 Joint design . 38
7 Manufacturing . 40
7.1 General . 40
7.2 Material traceability . 40
7.3 Manufacturing tolerances. 40
7.4 Permanent joints . 40
7.4.1 General . 40
7.4.2 Permanent joint and operator qualification. 40
7.4.3 Permanent joint operations and traceability . 40
7.4.4 Welding . 40
7.4.5 Brazing . 41
7.4.6 Permanent joints by deformation . 43
7.4.7 Non-permanent joints . 43
7.5 Forming of pressure parts . 44
7.5.1 General . 44
7.5.2 Deep drawing . 44
7.6 Post weld heat treatment . 45
7.7 Internal cleanness . 45
7.8 Repairs/Reworks . 45
7.9 Finishing operations . 45
8 Testing and inspection . 45
8.1 Performance of inspection and testing . 45
8.2 Design documentation, review and approval . 46
8.2.1 General . 46
8.2.2 Design documentation . 46
8.2.3 Design examination and design approval. 47
8.2.4 Design documentation change . 48
8.3 Type examination . 48
8.4 Calibration . 48
8.5 Material . 48
8.6 Manufacturing . 49
8.7 Non-destructive and destructive testing of welded joints . 49
8.8 Brazed joints . 50
8.9 Subcontracted elements . 50
8.10 Final inspection . 50
8.10.1 General . 50
8.10.2 Visual examination . 50
8.10.3 Examination of documentation . 51
8.10.4 Pressure test . 51
8.10.5 Leak test . 51
8.11 Marking . 52
8.12 Documentation . 52
3
---------------------- Page: 5 ----------------------
SIST EN 14276-1:2020
EN 14276-1:2020 (E)
8.12.1 General . 52
8.12.2 Manufacturer’s instruction . 52
8.12.3 Technical documentation for user . 53
8.12.4 Records . 53
Annex A (normative) Alternative requirements for prevention of brittle fracture: Method
according to temperature stress cases . 55
A.1 General . 55
A.2 Temperature stress cases . 57
A.3 Determination of lowest application temperatures for stress cases min t , min t
0 75 0
and min t . 57
50 0 25
A.4 Welding conditions . 58
A.4.1 Welded connections . 58
A.4.2 Heat treatment after welding . 59
A.5 Proof of notch impact energy . 59
Annex B (normative) Specification and approval of brazing procedures . 60
B.1 Introduction . 60
B.2 General . 60
B.2.1 Responsibility . 60
B.2.2 Specification of brazing procedures . 60
B.2.3 Technical content of BPS. 61
B.3 Test piece . 66
B.4 Examination and testing . 66
B.4.1 General . 66
B.4.2 Visual examination . 67
B.4.3 Tensile test . 67
B.4.4 Bend test . 67
B.4.5 Peel test . 68
B.4.6 Metallographic examination . 68
B.5 Range of approval . 68
B.5.1 General . 68
B.5.2 Related to the manufacturer . 68
B.5.3 Related to the material. 68
B.5.3.1 Parent metal . 68
B.5.3.2 Thickness . 69
B.5.4 Range of approval . 69
B.5.4.1 General . 69
B.5.4.2 Angle of branch connection . 70
B.5.4.3 Brazing process . 70
4
---------------------- Page: 6 ----------------------
SIST EN 14276-1:2020
EN 14276-1:2020 (E)
B.5.4.4 Flow position . 70
B.5.4.5 Joint design . 70
B.5.4.6 Filler material . 70
B.5.4.7 Brazing temperature . 71
B.5.4.8 Brazing flux . 71
B.5.4.9 Fuel gas, atmosphere, nature of flame or type of energy . 71
B.5.4.10 Post braze heat treatment . 71
B.6 Brazing Procedure Approval Record (BPAR) . 71
Annex C (normative) Pressure testing . 72
C.1 Pressure test . 72
C.1.1 General . 72
C.1.2 Basic requirements . 72
C.1.2.1 Pressure vessels . 72
C.1.2.2 Accessories . 72
C.1.2.3 Safety . 72
C.1.2.4 Hydraulic test . 72
C.1.2.5 Pneumatic test . 73
C.1.3 Pressure test . 73
C.1.3.1 Value of test pressure . 73
C.1.3.2 Specific value of test pressure for compressor housing . 73
C.1.3.3 Temperature requirement . 73
C.1.3.4 Test procedure . 74
C.1.3.5 Pass fail criteria . 74
C.1.3.6 Requirements for pressure gauges . 74
C.1.4 Final test report . 74
C.2 Acoustic emission examination . 75
Annex D (normative) Relations between the different pressures . 76
Annex E (normative) Experimental design methods . 77
E.1 Introduction. 77
E.1.1 General . 77
E.1.2 Methods . 77
E.1.3 Documentation . 78
E.1.4 Duplicate or similar parts . 78
E.1.4.1 General .
...
SLOVENSKI STANDARD
oSIST prEN 14276-1:2017
01-marec-2017
7ODþQDRSUHPD]DKODGLOQHVLVWHPHLQWRSORWQHþUSDONHGHO 3RVRGH6SORãQH
]DKWHYH
Pressure equipment for refrigerating systems and heat pumps - Part 1: Vessels -
General requirements
Druckgeräte für Kälteanlagen und Wärmepumpen - Teil 1: Behälter - Allgemeine
Anforderungen
Équipements sous pression pour systèmes de réfrigération et pompes à chaleur - Partie
1 : Récipients - Exigences générales
Ta slovenski standard je istoveten z: prEN 14276-1
ICS:
23.020.32 7ODþQHSRVRGH Pressure vessels
27.080 7RSORWQHþUSDONH Heat pumps
27.200 Hladilna tehnologija Refrigerating technology
oSIST prEN 14276-1:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN 14276-1:2017
---------------------- Page: 2 ----------------------
oSIST prEN 14276-1:2017
DRAFT
EUROPEAN STANDARD
prEN 14276-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2017
ICS 23.020.30; 27.080; 27.200 Will supersede EN 14276-1:2006+A1:2011
English Version
Pressure equipment for refrigerating systems and heat
pumps - Part 1: Vessels - General requirements
Équipements sous pression pour systèmes de Druckgeräte für Kälteanlagen und Wärmepumpen -
réfrigération et pompes à chaleur - Partie 1 : Récipients Teil 1: Behälter - Allgemeine Anforderungen
- Exigences générales
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 182.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14276-1:2017 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 14276-1:2017
prEN 14276-1:2017 (E)
Contents Page
European foreword . 6
Introduction . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 10
3.1 Definitions . 10
3.2 Symbols, descriptions and units . 13
4 Materials . 16
4.1 General . 16
4.2 Requirements for materials to be used for pressurized parts . 16
4.3 Requirements for materials . 16
4.3.1 General . 16
4.3.2 Cladding . 17
4.3.3 Special considerations . 17
4.4 Requirements for prevention of brittle fracture . 18
4.4.1 General . 18
4.4.2 Material requirements . 18
4.5 Material documentation . 18
4.6 Materials for non-pressure retaining parts . 18
5 Pressure Vessel classification . 18
5.1 Category of vessel . 18
5.2 Fluid classification . 19
6 Design . 20
6.1 General . 20
6.2 Corrosion and corrosion protection . 20
6.2.1 General . 20
6.2.2 Internal corrosion . 20
6.2.3 External corrosion . 20
6.2.4 Corrosion allowance information . 20
6.3 Stress corrosion cracking . 20
6.4 Loading. 21
6.5 Maximum allowable pressure PS . 21
6.6 Design pressure P . 21
d
6.7 Calculation pressure P or P . 21
c
6.8 Design temperature td . 21
6.9 Minimum material temperature . 21
6.10 Calculation temperature t . 21
c
6.10.1 General . 21
6.10.2 Vessel without heater . 22
6.10.3 Vessel with heater . 22
6.11 Joint coefficient for welds . 22
6.12 Design stress . 24
6.13 Access and inspection openings, venting and draining provisions, filling and discharge
provisions and handling devices . 25
6.13.1 Non corrosive fluids . 25
6.13.2 Corrosive fluids . 26
2
---------------------- Page: 4 ----------------------
oSIST prEN 14276-1:2017
prEN 14276-1:2017 (E)
6.13.3 Venting and draining provisions. 26
6.13.4 Filling and discharge provision . 26
6.13.5 Handling devices . 26
6.14 Methods for design . 26
6.14.1 General . 26
6.14.2 Design by formulas (DBF) . 26
6.14.3 Joint design . 31
7 Manufacturing. 31
7.1 General . 31
7.2 Material traceability . 31
7.3 Manufacturing tolerances . 31
7.4 Permanent joints . 31
7.4.1 General . 31
7.4.2 Permanent joint and operator qualification . 32
7.4.3 Permanent joint operations and traceability . 32
7.4.4 Welding . 32
7.4.5 Brazing. 34
7.4.6 Permanent joints by deformation . 35
7.4.7 Non-permanent joints . 36
7.5 Forming of pressure parts . 36
7.5.1 General . 36
7.5.2 Deep drawing . 36
7.6 Post weld heat treatment. 37
7.7 Internal cleanness . 37
7.8 Repairs/Reworks . 37
7.9 Finishing operations . 37
8 Testing and inspection. 37
8.1 Performance of inspection and testing . 37
8.2 Design documentation, review and approval. 38
8.2.1 General . 38
8.2.2 Design documentation . 38
8.2.3 Design review and design approval . 39
8.2.4 Design documentation change . 39
8.3 Type approval . 40
8.4 Calibration. 40
8.5 Material . 40
8.6 Manufacturing. 41
8.7 Non-destructive testing of welded joints . 41
8.8 Subcontracted elements . 41
8.9 Final inspection . 41
8.9.1 General . 41
8.9.2 Visual examination . 42
8.9.3 Examination of documentation . 42
8.9.4 Pressure test . 42
8.10 Marking . 42
8.11 Documentation . 43
8.11.1 General . 43
8.11.2 Manufacturer’s instruction . 43
8.11.3 Technical documentation for user . 44
8.11.4 Records . 44
Annex A (normative) Alternative requirements for prevention of brittle fracture: Method
according to temperature stress cases . 46
A.1 General . 46
3
---------------------- Page: 5 ----------------------
oSIST prEN 14276-1:2017
prEN 14276-1:2017 (E)
A.2 Temperature stress cases . 47
A.3 Determination of lowest application temperatures for stress cases min t , min t and
0 75 o 50
min t . 47
o 25
A.4 Welding conditions . 48
A.5 Proof of notch impact energy . 49
Annex B (normative) Specification and approval of brazing procedures . 50
B.1 Introduction . 50
B.2 General . 50
B.3 Test piece . 56
B.4 Examination and testing . 56
B.5 Range of approval . 57
B.6 Brazing Procedure Approval Record (BPAR) . 60
Annex C (normative) Pressure testing . 61
C.1 Pressure test . 61
C.2 Leak test. 64
C.3 Acoustic emission examination . 64
Annex D (normative) Relations between the different pressures . 65
Annex E (normative) Experimental methods . 66
E.1 Introduction . 66
E.2 Strain gauge test method . 68
E.3 Burst test . 68
E.4 Housings of hermetic compressors and vessels . 69
Annex F (normative) Material characteristics for design . 71
Annex G (informative) Component classification in the sense of the Pressure Equipment
Directive (PED) . 74
Annex H (informative) Selection of category . 75
H.1 General . 75
H.2 Definition of category for vessels for refrigerating pressure vessel . 75
Annex I (normative) Grouping system for materials (extracted from CEN ISO/TR 15608:2013) 76
I.1 Grouping system for steels . 76
I.2 Grouping system for aluminium and aluminium alloys . 76
I.3 Grouping system for copper and copper alloys . 77
Annex J (informative) DN System . 78
Annex K (normative) Specification and approval of expansion procedures and operators . 80
K.1 General . 80
K.2 Test piece . 82
K.3 Examination and testing . 82
K.4 Range of approval . 83
4
---------------------- Page: 6 ----------------------
oSIST prEN 14276-1:2017
prEN 14276-1:2017 (E)
K.5 Expansion Procedure Approval Record (EPAR) . 83
K.6 Expansion operator approval . 84
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/68/EU . 86
Bibliography . 88
5
---------------------- Page: 7 ----------------------
oSIST prEN 14276-1:2017
prEN 14276-1:2017 (E)
European foreword
This document (prEN 14276-1:2017) has been prepared by Technical Committee CEN/TC 182
“Refrigerating systems, safety and environmental requirements”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 14276-1:2006+A1:2011.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with Directive 2014/68/EU see informative Annex ZA, which is an integral part of this
document.
This document consists of the following parts under the general title Pressure equipment for refrigerating
systems and heat pumps:
— Part 1: Vessels – General requirements
— Part 2: Piping – General requirements.
6
---------------------- Page: 8 ----------------------
oSIST prEN 14276-1:2017
prEN 14276-1:2017 (E)
Introduction
This European Standard recognizes the unique nature of vessels for refrigerating systems or heat pumps and
is intended to address the specific needs of the refrigeration and heat pump industry. This standard should
be read in conjunction with the various parts of EN 13445.
When the text of this standard modifies or supplements a clause within EN 13445, then this standard should
prevail. Where this standard does not modify or supplement the requirements of a clause, the requirements
of EN 13445 should prevail.
The unique nature of a refrigerating system is defined as follows:
a) the purpose of the refrigerating system is to extract and reject heat (this involves both cooling and
heating);
b) to operate the refrigerating system a pressure-imposing element (e.g. a compressor or an energy
source) is necessary;
c) the refrigerating system has a defined refrigerant charge in a closed circuit;
d) the refrigerant has a chemical composition and purity defined in the relevant standards;
e) the pressure of the refrigerant decreases when the temperature decreases (see typical curve in Annex A
of this standard);
f) due to the maximum temperature limit of 150 °C and the maximum pressure limit of 160 bar, the time
dependant creep and fatigue due to pressure variation or vibrations are not significant design factors
except for some materials such as aluminium, copper and titanium where the fatigue should be taken
into account;
g) the risk of overpressure is due to:
1) the pressure imposing element;
2) an external heat source (e.g. fire or hot water);
3) improper operation.
h) the refrigerating system is designed to minimize refrigerant emissions and the ingress of contaminants.
Only hermetic compressors are covered by this standard.
7
---------------------- Page: 9 ----------------------
oSIST prEN 14276-1:2017
prEN 14276-1:2017 (E)
1 Scope
This European Standard specifies the requirements for material, design, manufacturing, testing and
documentation for stationary pressure vessels intended for use in refrigerating systems and heat pumps.
These systems are referenced in this standard as refrigerating systems as defined in EN 378-1.
This European Standard applies to vessels, including welded or brazed attachments up to and including the
nozzle flanges, screwed, welded or brazed connectors, or to the edge to be welded or brazed at the first
circumferential joint connecting piping or other elements.
This European Standard applies to pressure vessels with an internal pressure down to – 1 bar, to account for
the evacuation of the vessel prior to charging with refrigerant.
This European Standard applies to both the mechanical loading conditions and thermal conditions as
defined in EN 13445-3 associated with refrigerating systems. It applies to pressure vessels subject to the
maximum allowable temperatures for which nominal design stresses for materials are derived using
EN 13445-2 and EN 13445-3 or as specified in this standard. In ad
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.