SIST EN 16084:2011
(Main)Refrigerating systems and heat pumps - Qualification of tightness of components and joints
Refrigerating systems and heat pumps - Qualification of tightness of components and joints
This European Standard is intended to describe the qualification procedure for type approval of the tightness of hermetically sealed and closed components, joints and parts used in refrigerating systems and heat pumps as described in EN 378. The sealed and closed components, joints and parts concerned are, in particular, fittings, bursting discs, flanged or fitted assemblies. The tightness of flexible piping made from non metallic materials is dealt with in EN 1736. Metal flexible piping are covered by this standard.
The requirements contained in this document are applicable to joints of maximum DN 50 and components of maximum 5 l and maximum weight of 50 kg.
This document is intended to characterise their tightness, stresses met during their operations, following the fitting procedure specified by the manufacturer, and to specify the minimal list of necessary information to be provided by the supplier of a component to the person in charge of carrying out this procedure.
It specifies the level of tightness of the component, as a whole, and its assembly as specified by its manufacturer.
It applies to the hermetically sealed and closed components, joints and parts used in the refrigerating installations, including those with seals, whatever their material and their design are.
This document specifies additional requirements for mechanical joints that can be recognised as hermetically sealed joints.
Kälteanlangen und Wärmepumpen - Qualifizierung der Dichtheit der Bauteile und Verbindungen
Diese Europäische Norm ist als Beschreibung des Verfahrens zur Qualifizierung der Baumusterprüfung der
Dichtheit von hermetisch dichten und geschlossenen Bauteilen, Verbindungen und Teilen vorgesehen, die in
Kälteanlagen und Wärmepumpen, wie in EN 378 beschrieben, Anwendung finden. Bei den behandelten
dichten und geschlossenen Bauteilen, Verbindungen und Teilen handelt es sich insbesondere um Fittings,
Berstscheiben sowie geflanschte oder mit Verbindungsstücken hergestellte Baugruppen. Die Dichtheit von
flexiblen Rohrleitungen aus nicht metallischen Werkstoffen wird in EN 1736 behandelt. Flexible Rohrleitungen
aus Metall werden von der vorliegenden Norm abgedeckt.
Die in diesem Dokument enthaltenen Anforderungen gelten für Verbindungen mit höchstens DN 50 und für
Bauteile mit einem inneren Volumen von höchstens 5 l und einer Höchstmasse von 50 kg.
Dieses Dokument ist dafür vorgesehen, deren Dichtheit und die im Betrieb bei Befolgung des durch den
Hersteller festgelegten Verfahrens des Zusammenbaus auftretenden Beanspruchungen zu charakterisieren
sowie die Liste der Informationen festzulegen, die der für die Durchführung dieses Verfahrens verantwortlichen
Person durch den Lieferanten eines Bauteils mindestens bereitzustellen sind.
Das vorliegende Dokument legt den Grad der Dichtheit des Bauteils als Ganzes sowie dessen durch den
Hersteller festgelegten Zusammenbau fest.
Es ist auf die in kältetechnischen Einrichtungen angewendeten, hermetisch dichten und geschlossenen
Bauteile, Verbindungen und Teile anwendbar, einschließlich der mit Dichtungen versehenen, unabhängig von
deren Werkstoff und Auslegung.
Diese Europäische Norm legt zusätzliche Anforderungen an mechanische Verbindungen fest, die als
hermetisch dichte Verbindungen anerkannt werden können.
Systèmes de réfrigération et pompes à chaleur - Qualification de l'étanchéité des composants et joints
La présente Norme européenne a pour objet de décrire les procédures de qualification pour essai de type de
l’étanchéité des composants, joints et éléments hermétiquement scellés et fermés, utilisés dans les systèmes
de réfrigération et les pompes à chaleur comme décrits dans l’EN 378. Les composants, joints et éléments
scellés et fermés concernés sont, notamment, les raccords, les disques de rupture ou d’éclatement, les
assemblages à bride ou à raccord. L’étanchéité des flexibles en matériaux non métalliques est traitée dans
l’EN 1736. Les flexibles métalliques sont couverts par la présente norme.
Les exigences de ce document s’appliquent aux connections de DN 50 maximum et aux composants de
volume interne de 5 l maximum et d’un poids maximum de 50 kg.
Le présent document est destiné à caractériser leur étanchéité, les contraintes rencontrées pendant leur
fonctionnement, en suivant la procédure de montage spécifiée par le fabricant et à spécifier la liste minimale
des informations nécessaires à fournir par le fournisseur d’un composant à la personne chargée de mettre en
oeuvre cette procédure.
Il spécifie le niveau d’étanchéité du composant, dans son ensemble, ainsi que son assemblage comme
spécifié par son fabricant.
Il est applicable aux composants, joints et éléments scellés et fermés utilisés dans les installations
frigorifiques, y compris ceux avec joints d’étanchéité, indépendamment de leur matière et de leur conception.
La présente Norme européenne spécifie des exigences supplémentaires concernant les joints mécaniques
susceptibles d’être considérés comme des joints hermétiquement scellés.
Hladilni sistemi in toplotne črpalke - Ocena tesnosti sestavnih delov in spojev
Ta evropski standard opisuje postopek ocenjevanja za tipsko odobritev tesnosti hermetično zatesnjenih in zaprtih sestavnih delov, spojev in delov, ki se uporabljajo v hladilnih sistemih in toplotnih črpalkah, kot je opisano v EN 378. Obravnavani zatesnjeni in zaprti sestavni deli, spoji in deli so predvsem fitingi, lomne ploščice, prirobni ali vgrajeni sestavi. Tesnost prožnih cevi, narejenih iz nekovinskih materialov, obravnava EN 1736. Kovinske prožne cevi zajema ta standard.
Zahteve, ki jih vsebuje ta dokument, veljajo za spoje z največjim DN 50 in sestavne dele z največ 5 l in največjo težo 50 kg.
Ta dokument je namenjen karakterizaciji njihove tesnosti in obremenitev med obratovanjem, ki sledi postopku namestitve, ki ga določi proizvajalec, in določa minimalni seznam potrebnih informacij, ki jih mora zagotoviti dobavitelj sestavnega dela pristojni osebi za izvedbo tega postopka.
Določa raven tesnosti sestavnega dela kot celote in njegovega sestava, kot ga določa proizvajalec.
Velja za hermetično zatesnjene in zaprte sestavne dele, spoje in dele, ki se uporabljajo v hladilnih inštalacijah, vključno s tistimi, ki imajo tesnila, ne glede na njihov material in zasnovo.
Ta dokument določa dodatne zahteve za mehanske spoje, ki se lahko priznajo kot hermetično zatesnjeni spoji.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kälteanlangen und Wärmepumpen - Qualifizierung der Dichtheit der Bauteile und VerbindungenSystèmes de réfrigération et pompes à chaleur - Qualification de l'étanchéité des composants et jointsRefrigerating systems and heat pumps - Qualification of tightness of components and joints27.200Hladilna tehnologijaRefrigerating technology27.080Heat pumpsICS:Ta slovenski standard je istoveten z:EN 16084:2011SIST EN 16084:2011en,fr,de01-oktober-2011SIST EN 16084:2011SLOVENSKI
STANDARD
SIST EN 16084:2011
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16084
April 2011 ICS 27.080; 27.200 English Version
Refrigerating systems and heat pumps - Qualification of tightness of components and joints
Systèmes de réfrigération et pompes à chaleur - Qualification de l'étanchéité des composants et des joints Kälteanlangen und Wärmepumpen - Qualifizierung der Dichtheit der Bauteile und Verbindungen This European Standard was approved by CEN on 20 February 2011.
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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16084:2011: ESIST EN 16084:2011
EN 16084:2011 (E) 2 Contents Page Foreword .31Scope .42Normative references .43Terms and definitions .54Symbols .65Test requirements .76Requirements for hermetically sealed systems . 117Test procedures . 117.1General . 117.2Sampling . 117.3Test temperature . 117.4Tightness test . 127.4.1General . 127.4.2Tightness control level . 137.5Requirements for joints . 157.5.1Test samples . 157.5.2Torque . 157.5.3Reusable joint . 157.5.4Requirements for hermetically sealed joints . 157.6Pressure-temperature vibration tests (PTV) . 167.6.1General . 167.6.2Samples . 167.6.3Test method . 167.6.4Method 1: Combined pressure-temperature cycle test with integrated vibration test . 177.6.5Method 2: Combined pressure-temperature cycle test with a separate vibration test . 187.7Operation simulation . 247.8Freezing test . 257.9Additional pressure test for hermetically sealed joints . 267.10Vacuum Test . 267.11Compatibility Screening Test . 277.11.1General . 277.11.2Test fluids . 277.11.3Test specimens . 277.11.4Test setup parameters . 277.11.5Test procedure . 287.11.6Pass/fail criteria for sealing elements . 297.12Fatigue test for hermetically sealed joints . 308Test report . 309Information to the user . 30Annex A (normative)
Equivalent tightness control levels . 31A.1Calculation models . 31A.2From volumetric flow to mass flow. 32A.3Tightness control level stated as bubbles of air in unit time . 34Annex B (informative)
Test arrangements . 37Bibliography . 38 SIST EN 16084:2011
EN 16084:2011 (E) 3 Foreword This document (EN 16084:2011) has been prepared by Technical Committee CEN/TC 182 “Refrigerating systems, safety and environmental requirements”, 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 October 2011, and conflicting national standards shall be withdrawn at the latest by October 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 16084:2011
EN 16084:2011 (E) 4 1 Scope This European Standard is intended to describe the qualification procedure for type approval of the tightness of hermetically sealed and closed components, joints and parts used in refrigerating systems and heat pumps as described in EN 378. The sealed and closed components, joints and parts concerned are, in particular, fittings, bursting discs, flanged or fitted assemblies. The tightness of flexible piping made from non-metallic materials is dealt with in EN 1736. Metal flexible piping are covered by this standard. The requirements contained in this document are applicable to joints of maximum DN 50 and components of internal volume of maximum 5 l and maximum weight of 50 kg. This document is intended to characterise their tightness stresses met during their operations, following the fitting procedure specified by the manufacturer, and to specify the minimal list of necessary information to be provided by the supplier of a component to the person in charge of carrying out this procedure. It specifies the level of tightness of the component, as a whole, and its assembly as specified by its manufacturer. It applies to the hermetically sealed and closed components, joints and parts used in the refrigerating installations, including those with seals, whatever their material and their design are.
This European Standard specifies additional requirements for mechanical joints that can be recognised as hermetically sealed joints. 2 Normative references The following referenced documents are indispensable for the application 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 378-1:2008, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 1: Basic requirements, definitions, classification and selection criteria EN 1330-8:1998, Non-destructive testing — Terminology — Part 8: Terms used in leak tightness testing EN 1593, Non-destructive testing — Leak testing — Bubble emission techniques EN 1736, Refrigerating systems and heat pumps — Flexible pipe elements, vibration isolators, expansion joints and non-metallic tubes — Requirements, design and installation EN 12284, Refrigerating systems and heat pumps — Valves — Requirements, testing and marking EN 12693, Refrigerating systems and heat pumps — Safety and environmental requirements — Positive displacement refrigerant compressors EN 13134, Brazing — Procedure approval EN 13185:2001, Non-destructive testing — Leak testing — Tracer gas method EN 60068-2-6, Environmental testing — Part 2-6: Tests — Tests Fc: Vibration (sinusoidal) (IEC 60068-2-6:2007) EN 60068-2-64, Environmental testing — Part 2-64: Tests — Test Fh: Vibration, broadband random and guidance (IEC 60068-2-64:2008) EN 60335-2-34, Household and similar electrical appliances — Safety — Part 2-34: Particular requirements for motor-compressors (IEC 60335-2-34:2002) SIST EN 16084:2011
EN 16084:2011 (E) 5 EN ISO 175, Plastics — Methods of test for the determination of the effects of immersion in liquid chemicals (ISO 175:2010) ISO 1817, Rubber, vulcanized — Determination of the effect of liquids 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1330-8:1998 and EN 378-1:2008 and the following apply. 3.1 mass flow rate Qm value of the leak mass flow rate at any point of the component
NOTE The mass flow rate is expressed in grams (g) per year. 3.2 volume flow rate
Q value of the leak volume flow rate at any point of the component
NOTE The volume flow rate is expressed in pascal cubic metres per second (Pa·m³/s). 3.3 hermetically sealed system system in which all refrigerant containing parts are made tight by welding, brazing or a similar permanent connection which may include capped valves and capped service ports that allow proper repair or disposal and which have a tested tightness control level of less than 3 g per year under a pressure of at least a quarter of the maximum allowable pressure NOTE Sealed systems as defined in EN 378-1:2008 equal hermetically sealed systems. 3.4 product family group of products that have the same function, same technology, and same material for each functional part and sealing materials 3.5 permanent joints means joints which cannot be disconnected except by destructive methods [Adapted from the Pressure Equipment Directive 97/23/EC] 3.6 reusable joint joint made without replacing the sealing material in general procedure NOTE In some cases the tube is used as sealing material (e.g. flared joint). 3.7 same base material material belonging to the same group as follows: steel group; aluminium and aluminium alloy group; or copper group NOTE Subgroups of these material groups are considered to be same base materials (refer to EN 14276-2). SIST EN 16084:2011
EN 16084:2011 (E) 6 4 Symbols Symbols used in this standard are given in Table 1. Table 1 — Symbols Symbol Denomination Unit DKrel Percentage deviation of the minimum and maximum torque from the average of the minimum and maximum torque, (Kmax – Kmin)/(Kmin + Kmax)
f Frequency of vibrations Hz Kave Average torques of the respective joint standard Nm Kmax Required maximum torques of the respective joint standard, if specified. Otherwise, the maximum torque values supplied by the manufacturer. Nm Kmin Required minimum torques of the respective joint standard, if specified. Otherwise, the minimum torque values supplied by the manufacturer. Nm L Length of tube mm n Number of cycles in temperature and in pressure (method 1)
n1 Number of cycles in temperature and in pressure (method 2)
n2 Number of cycles in pressure
n3 Number of cycles in vibration
ntotal Total number of cycles in temperature and in pressure
N Number of samples
P Tightness test pressure bar Pmax Maximal pressure of cycle bar Pmin Minimal pressure of cycle bar PS Maximal allowable pressure bar Pset Nominal set pressure of the device bar Q Volume flow rate Pa·m3/s Qm Mass flow rate g/yr s Vibration displacement (peak to peak value) mm Tmax Maximal temperature of cycle °C Tmin Minimal temperature of cycle °C SIST EN 16084:2011
EN 16084:2011 (E) 7 5 Test requirements The required tests to be applied to component bodies and joint used in refrigerating systems and heat pumps are given in Table 2 and in Table 3. The following figures show in Figure 1 the principle of a component and a joint and their corresponding requirements in Table 2 or Table 3.
a) According to Table 2
b) According to Table 2
c) According to Table 3 Key 1 joint 2 component body 3 pipe 4 component body joint 5 extension pipe Figure 1 — Principle: component body-joint All component types and joints types shall be tested. When a component may be connected with different types of joints, one of these joints shall be tested with the component according to Table 2. The other possible types of joints shall be tested independently according to Table 3. SIST EN 16084:2011
EN 16084:2011 (E) 8 Table 2 — Requirements for component bodies
Components (including valves): Requirements Tightness test 7.4 PTV- test (pressure-temperature-vibration) 7.6 Operation simulation 7.7 Freezing test 7.8 Chemical compatibility with materials 7.11 Vacuum test7.10 Additional test for hermetically sealed Pressure test 7.9 Fatigue test 7.12 Component bodies having only permanent body joints: brazing and welding Identical base materials YES NO NO
NO NO NO NO NO Components having permanent body joints: brazing and welding Different base materials YES YES a
NO NO NO NO NO NO Component bodies having other permanent body joints: e.g. glue, permanent compression fittings, expansion joints YES YES NO YES if operating temperature below 0 °C YES if non metallic parts YES YES YES Component bodies with non permanent body joints
YES YES YES if any external stems, shaft seals or removable or replaceable parts YES if operating temperature below 0 °C YES if non metallic parts YES Not applicable Not applicable a PTV tests are not required if destructive and non destructive tests of EN 13134 are carried out. SIST EN 16084:2011
EN 16084:2011 (E) 9 Table 2 (continued) Components (including valves): Requirements Tightness test 7.4 PTV- test (pressure-temperature-vibration) 7.6 Operation simulation 7.7 Freezing test 7.8 Chemical compatibility with materials 7.11 Vacuum test7.10 Additional test for hermetically sealed Pressure test 7.9 Fatigue test 7.12 Capped valves and capped service ports for hermetically sealed systems YES YES YES YES if operating temperature below 0 °C YES if non metallic parts YES YES YES Safety valves YES YES NO NO YES if non metallic parts Not applicable Not applicable Not applicable Flexible piping Test according to EN 1736 By exception compressors that comply with the requirements of EN 12693 or EN 60335-2-34 only need to be subjected to the following test: joints connecting to other parts of the refrigerating systems; chemical compatibility test for all gaskets (sight glass, etc.). NOTE Other qualifications for this chemical compatibility done according to other standards are equivalent.
SIST EN 16084:2011
EN 16084:2011 (E) 10 Table 3 — Requirements for the joining of components
Joints and parts Requirements Tightness test 7.4 PTV- test
(pressure-temperature-vibration) 7.6 Operation simulation 7.7 Freezing test 7.8 Chemical compatibility with materials 7.11 Vacuum test7.10 Additional test for hermetically sealed Pressure test 7.9 Fatigue test 7.12 Permanent piping joints: brazing and welding Identical base materials YES NO NO NO NO NO NO NO Permanent piping joints: brazing and welding Different base materials YES YES NO NO NO NO NO NO Other permanent piping joints: e.g. glue, permanent compression fittings, expansion joints YES YES NO YES YES YES YES YES Non permanent piping joints YES YES YES YES YES, if sealing material YES Not applicable Not applicable Gaskets and sealing NO NO NO NO YES NO Not applicable Not applicable
SIST EN 16084:2011
EN 16084:2011 (E) 11 6 Requirements for hermetically sealed systems Hermetically sealed systems shall be constructed with components which have their tightness control level qualified as A1 or A2 as per Table 4 or Table 5. These components and joints shall be submitted to the relevant tests as specified in Tables 2 and 3. 7 Test procedures 7.1 General The components, joints and part shall pass the tightness test before the other tests are executed. The different tests are shown in Figure 2.
Figure 2 — Test procedure 7.2 Sampling The largest, the smallest and any random samples in between of the product family shall be submitted to the test as required in Table 2 or Table 3. The samples used for pressure-temperature vibration test (7.6) and for operation simulation (7.7) shall be the same. For each of the other tests (7.8, 7.9, 7.10, 7.11, 7.12), different samples may be used. 7.3 Test temperature Test temperature (ambient and gas) shall be 15 °C to 35 °C, unless otherwise specified as the test conditions. SIST EN 16084:2011
EN 16084:2011 (E) 12 7.4 Tightness test 7.4.1 General The tightness of components and joints shall be tested. For pressure relief devices P = 0,9 × Pset (+ 0/- 2) %; For all other components and joints P = PS (+ 0/- 2) % (PS = Maximum allowable pressure);
Q
≤ requirements for actual tightness control level A1 – A2 (hermetically sealed components) or B1 – B2 for all other components. The maximum required tightness control level are specified for Helium at 10 bar and + 20 °C as a reference. The actual tightness control levels can be calculated (e.g. other test fluids or pressures) by using the stated calculation formulas (Annex A). The maximum tightness control level depends on the size of the tested component or joint. Tightness control levels are specified in accordance with the joints used in Table 4. These are levels for each individual joint. Table 4 — Tightness control level according to joints nominal diameter
Joints
DN Tightness control levels Hermetically sealed joints≤ 50 A1 Closed joints ≤ 50 B1
For components, the tightness control level depends on the component internal volume and the type of component as specified in Table 5. These are levels for each individual component. Table 5 — Tightness control level according to components volume
Components Component Volume l Tightness control levels Hermetically sealed components0 up to 1,0 A1 > 1,0 A2 Closed components 0 up to 2,0 B1 Closed components > 2,0 up to 5,0 B2
The required tightness control level is stated in Table 5. The manufacturer can choose more stringent tightness control level if adequate. SIST EN 16084:2011
EN 16084:2011 (E) 13 Table 6 — Equivalence of test gas flow according to tightness control levels
Component type Tightness control level Qhe-ref helium reference leak +20 °C, 10 bar Pa·m3/s Equivalent air leak (Qair-ref)
+20 °C, 10 bar Pa·m3/s Equivalent
iso-butane leak (mR600a) +20 °C,
10 bar
g/yr Hermetically sealed A1 ≤ 7,5 × 10-7 ≤ 8 × 10-7 ≤ 1,5 A2 ≤ 1 × 10-6 ≤ 11 × 10-7 ≤ 2,0 Closed B1 ≤ 1 × 10-6 ≤ 11 × 10-7 ≤ 2,0 B2 ≤ 2 × 10-6 ≤ 2,1 × 10-6 ≤ 4,0 NOTE The equivalent iso-butane leak is calculated as gas. At +20 °C and 10 bar iso-butane is in the liquid phase. See R600a in Table A.1.
7.4.2 Tightness control level NOTE EN 1779 gives guidance on the criteria for method and technique selection. 7.4.2.1 Test method The tightness control level of joints and components shown in Table 4 and Table 5 shall be measured by the vacuum chamber technique which sum all leak. It is preferable to use tracer gas technique as defined in EN 13185:2001, Clause 10. The component to be tested is pressurised with the tracer gas and placed in the vacuum chamber which measure the sum of all the component’s leak. The following procedure shall be carried out to measure the tightness control level: connect the vacuum chamber to the detector; connect the component to the tracer gas pressure generator (in the vacuum chamber) see drawing below; close the vacuum box and start the leak detector (and if it is needed add a vacuum pump); adjust and calibrate the leak detector according to EN 13185:2001, 9.1.1; measure the residual signal in the vacuum box and the component without helium pressure; adjust the test pressure in the component; measure the leak signal of the component; NOTE This signal is the total flow of the tracer gas from the component measured by the leak detector. calculate the leak level according to the formula given in EN 13185:2001, 9.2.6. If joints and/or components are tested together, the total level shall fulfil the most stringent tightness control level of the individual joint or component. SIST EN 16084:2011
EN 16084:2011 (E) 14
Key 1 tracer gas (PS) 2 vacuum 3 vacuum 4 mass spectrometric leak detector 5 test object 6 calibrated leak Figure 3 — Principle of tightness control - tracer gas
7.4.2.2 Alternative test methods Two alternative methods may be applied. a) Alternative method 1: The control by pressure technique by accumulation, in accordance with 10.4.1 of EN 13185:2001, could be a method to measure the leak rate of the component. b) Alternative method 2: Bubble test methods shown in Figure 4 can be acceptable for tightness control level B, provided that the method is capable to measure the actual leakage rate. The bubble test methods shall be carried out in accordance with EN 1593. The accuracy of the selected method shall be verified and be in compliance with the requirements for actual tightness control level. If this method is used, the following requirements shall be applied: 1) the test object shall be subjected to an internal air pressure = PS (maximum allowable pressure). Reduced pressure is not acceptable; 2) the test object shall be immersed in water; 3) the test object shall be exposed to atmospheric pressure; 4) the test shall be performed at normal ambient temperature; 5) the period of time between bubbles leaving the test object shall be more than 60 s. SIST EN 16084:2011
EN 16084:2011 (E) 15
Key 1 water 2 test object 3 air pressure (PS) Figure 4 — Principle of tightness control - Bubble method
7.5 Requirements for joints 7.5.1 Test samples All joints tested shall be tested in the final form as the customer receives the part. All joints shall be submitted to the tests as indicated in Table 3. 7.5.2 Torque Tube joints shall be tested both at the minimum torque Kmin and the maximum torque Kmax defined in Table 7. Table 7— Torque for the test, Kmin and Kmax
Kmin Kmax IF DKrel > or = 20 % Kmin Kmax IF 20 % > DKrel 0,8 × K,ave 1,2 × Kave
7.5.3 Reusable joint If the joints to be tested are reusable, the following steps shall be taken before the test: a) fit the joints to tubes to be connected and tighten the joints to the maximum torque Kmax specified in Table 7; b) loosen the joints and take the tubes completely apart; c) repeat a) and b) four more times. 7.5.4 Requirements for hermetically sealed joints The joint shall not be opened without the use of special tools. NOTE Special tools are other than screw-drivers, parallel wrenches, simple gripping tool, etc. The joint shall not be reusable without replacing the sealing material in normal use. In case the sealing material is the tube, including that the tube is deformed during the sealing process, the deformed part of the tube shall not be reusable for sealing purpose. SIST EN 16084:2011
EN 16084:2011 (E) 16 7.6 Pressure-temperature vibration tests (PTV) 7.6.1 General For pressure-temperature vibration tests, method 1 or method 2 as described as follows shall be applied. The test on components or joints shall comply with one of the two methods described in 7.6.4 and 7.6.5 for combined cycle testing in order to qualify the tightness level. 7.6.2 Samples For the combined cycle test, the number of samples is determined based on tightness control level according to Table 8. Table 8 — Test parameters Tightness control level Number of samples A1, B1 3 A2, B2 2
7.6.3 Test method 7.6.3.1 Equipment
Test equipment shall be composed of: a) regulated enclosure for environment tests, able to maintain temperatures varying regularly between Tmin and Tmax;
b) pressure device, connected to the joints, capable of producing a pressure that varies between Pmin and Pmax;
c) vibration generator, to make the specified frequency and amplitude; d) pressure control system capable to control the pressure with an accuracy of ± 5 %; e) temperature control system capable of controlling the temperature inside of the test enclosure with an accuracy of ± 5 °C; f) temperature sensor capable to monitor the temperature (Tmax, Tmin) of the component or joint submitted to the test. The temperature sensor shall be adhered to the surface of the sample on the item with the biggest weight concentration of the pressure bearing part in order to assure that the sample has reached the defined temperature values. Where the pressure bearing part is made from metallic and non-metallic materials, the sensor shall be fixed on the non-metallic material. The sensor can be fixed to the sample by soldering or with adhesives, whichever is more appropriate, depending on the material of the sample. Another method, proven to have the same performance as the thermocouple can be applied; g) cycle counter of temperature and pressure; h) test equipment to perform tightness test according to 7.4. SIST EN 16084:2011
EN 16084:2011 (E) 17 7.6.3.2 Test arrangements
The test samples shall be mounted as shown in Annex B in accordance with the number of joints to be tested and with the dimension of the climatic enclosure in whi
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kälteanlangen und Wärmepumpen - Qualifizierung der Dichtheit der Bauteile und VerbindungenSystèmes de réfrigération et pompes à chaleur - Qualification de l'étanchéité des composants et jointsRefrigerating systems and heat pumps - Qualification of tightness of components and joints27.200Hladilna tehnologijaRefrigerating technology27.080Heat pumpsICS:Ta slovenski standard je istoveten z:FprEN 16084kSIST FprEN 16084:2010en,fr,de01-julij-2010kSIST FprEN 16084:2010SLOVENSKI
STANDARD
kSIST FprEN 16084:2010
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 16084
April 2010 ICS
English Version
Refrigerating systems and heat pumps - Qualification of tightness of components and joints
Systèmes de réfrigération et pompes à chaleur - Qualification de l'étanchéité des composants et joints
Kälteanlangen und Wärmepumpen - Qualifizierung der Dichtheit der Bauteile und Verbindungen This draft European Standard is submitted to CEN members for unique acceptance procedure. 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. FprEN 16084:2010: EkSIST FprEN 16084:2010
FprEN 16084:2010 (E) 2 Contents Page Foreword .31Scope .42Normative references .43Terms and definitions .54Symbols .65Test requirements .76Requirements for hermetically sealed systems . 117Test procedures . 117.1General . 117.2Sampling . 117.3Test temperature . 117.4Tightness test . 127.5Requirements for joints . 157.6Pressure temperature vibration tests (PTV) . 167.7Operation simulation . 247.8Freezing test . 257.9Additional pressure test for hermetically sealed joints . 267.10Vacuum Test . 267.11Compatibility Screening Test . 277.12Fatigue test for hermetically sealed joints . 308Test report . 309Information to the user . 30Annex A (normative)
Equivalent tightness control levels . 31A.1Calculation models . 31A.2From volumetric flow to mass flow. 32A.3Tightness control level stated as bubbles of air in unit time . 34Annex B (informative)
Test arrangements . 37Bibliography . 39 kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 3 Foreword This document (FprEN 16084:2010) 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 Unique Acceptance Procedure. kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 4 1 Scope This European Standard is intended to describe the qualification procedure for type approval of the tightness of hermetically sealed and closed components, joints and parts used in refrigerating systems and heat pumps as described in EN 378. The sealed and closed components, joints and parts concerned are, in particular, fittings, bursting discs, flanged or fitted assemblies. The tightness of flexible piping made from non metallic materials is dealt with in EN 1736. Metal flexible piping are covered by this standard. The requirements contained in this document are applicable to joints of maximum DN 50 and components of maximum 5 l and maximum weight of 50 kg. This document is intended to characterise their tightness, stresses met during their operations, following the fitting procedure specified by the manufacturer, and to specify the minimal list of necessary information to be provided by the supplier of a component to the person in charge of carrying out this procedure. It specifies the level of tightness of the component, as a whole, and its assembly as specified by its manufacturer. It applies to the hermetically sealed and closed components, joints and parts used in the refrigerating installations, including those with seals, whatever their material and their design are.
This document specifies additional requirements for mechanical joints that can be recognised as hermetically sealed joints. 2 Normative references The following referenced documents are indispensable for the application 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 378-1:2008, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 1: Basic requirements, definitions, classification and selection criteria EN 1330-8:1998, Non-destructive testing — Terminology — Part 8: Terms used in leak tightness testing EN 1736, Refrigerating systems and heat pumps — Flexible pipe elements, vibration isolators, expansion joints and non-metallic tubes — Requirements, design and installation EN 12284, Refrigerating systems and heat pumps — Valves — Requirements, testing and marking EN 12693, Refrigerating systems and heat pumps — Safety and environmental requirements — Positive displacement refrigerant compressors EN 13185:2001, Non-destructive testing — Leak testing — Tracer gas method EN ISO 175, Plastics — Methods of test for the determination of the effects of immersion in liquid chemicals (ISO 175:1999) ISO 1817, Rubber, vulcanized — Determination of the effect of liquids IEC 60068-2-6, Environmental testing — Part 2-6: Tests — Test Fc: Vibration (sinusoidal) IEC 60068-2-64, Environmental testing — Part 2-64: Tests — Test Fh: Vibration, broad-band random and guidance IEC 60335-2-34, Household and similar electrical appliances — Safety — Part 2-34: Particular requirements for motor-compressors kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 5 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1330-8:1998 and EN 378-1:2008 and the following apply. 3.1 mass flow rate qm value of the leak mass flow rate at any point of the component
NOTE The mass flow rate is expressed in grams (g) per year. 3.2 volume flow rate
Q value of the leak volume flow rate at any point of the component
NOTE The volume flow rate is expressed in pascal cubic metres per second (Pa·m³/s). 3.3 hermetically sealed system system in which all refrigerant containing parts are made tight by welding, brazing or a similar permanent connection which may include capped valves and capped service ports that allow proper repair or disposal and which have a tested tightness control level of less than 3 g per year under a pressure of at least a quarter of the maximum allowable pressure NOTE Sealed systems as defined in EN 378-1:2008 equal hermetically sealed systems. 3.4 product family group of products that have the same function, same technology, and same material for each functional part and sealing materials 3.5 permanent joints means joints which cannot be disconnected excepts by destructive methods [Adapted from the Pressure Equipment Directive 97/23/EC] 3.6 reusable joint joint made without replacing the sealing material in general procedure NOTE In some cases the tube is used as sealing material (e.g. flared joint). 3.7 same base material material belonging to the same group as follows: steel group; aluminium and aluminium alloy group; and copper group NOTE Subgroups of these material groups are considered to be same base materials (refer to EN 14276-2). kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 6 4 Symbols Symbols used in this standard are given in Table 1. Table 1 — Symbols Symbol Denomination Unit Dkrel Percentage deviation of the minimum and maximum torque from the average of the minimum and maximum torque, (Ko,max – Ko,min)/(Ko,min + Ko,max)
F Frequency of vibrations Hz Ko,ave Average torques of the respective joint standard
Ko,max Required maximum torques of the respective joint standard, if specified. Otherwise, the maximum torque values supplied by the manufacturer
Ko,min Required minimum torques of the respective joint standard, if specified. Otherwise, the minimum torque values supplied by the manufacturer
L Length of tube Mm N Number of cycles in temperature and in pressure (method 1)
n1 Number of cycles in temperature and in pressure(method 2)
n2 Number of cycles in pressure
n3 Number of cycles in vibration
ntotal Total number of cycles in temperature and in pressure
N Number of samples
P Tightness test pressure bar Pmax Maximal pressure of cycle bar Pmin Minimal pressure of cycle bar PS Maximal allowable pressure bar Pset Nominal set pressure of the device bar Q Volume flow rate Pa·m3/s Qm Mass flow rate g/yr S Vibration displacement (peak to peak value) Mm Tmax Maximal temperature of cycle °C Tmin Minimal temperature of cycle °C kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 7 5
Test requirements The required tests to be applied to component bodies and joint used in refrigerating systems and heat pumps are given in Table 2 and in Table 3. The following figures show in Figure 1 the principle of a component and a joint and their corresponding requirements in Table 2 or Table 3.
a) According to Table 2 b)According to Table 2 c) According to Table 3 Key 1 joint 2 component body 3 pipe 4 component body joint 5 extension pipe Figure 1 — Principle: component body-joint All component types and joints types shall be tested. When a component may be connected with different types of joints, one of these joints shall be tested with the component according to Table 2. The other possible types of joints shall be tested independently according to Table 3. kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 8 Table 2 — Requirements for component bodies
Requirements Tightness test 7.4 PTV- test (pressure-temperature-vibration) 7.6 Operation simulation 7.7 Freezing test 7.8 Chemical compatibility with materials
Vacuum test7.10 Additional test for hermetically sealed 7.9 Pressure test Fatigue test Components (including valves):
Component bodies having only permanent body joints: brazing and welding Identical base materials YES NO NO
NO NO NO NO NO Components having permanent body joints: brazing and welding Different base materials YES YES a
NO NO NO NO NO NO Component bodies having other permanent body joints: e.g. glue, permanent compression fittings, expansion joints YES YES NO YES if operating temperature below 0 °C YES if non metallic parts YES YES YES Component bodies with non permanent body joints
YES YES YES if any external stems, shaft seals or removable or replaceable parts YES if operating temperature below 0 °C YES if non metallic parts YES Not applicable Not applicable a PTV tests are not required if destructive and non destructive tests of EN 13134 are carried out. kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 9 Table 2 (continued)
Requirements tightness test 7.4 PTV- test (pressure-temperature-vibration) 7.6 Operation simulation 7.7 Freezing test 7.8 Chemical compatibility with materials Vacuum test7.10 Additional test for hermetically sealed 7.9 Pressure test Fatigue test Capped valves and capped service ports for hermetically sealed systems YES YES YES YES if operating temperature below 0 °C YES if non metallic parts YES YES YES Safety valves YES YES NO NO YES if non metallic parts Not applicable Not applicable Not applicable Flexible piping Test according to EN 1736 By exception compressors that comply with the requirements of EN 12693 or IEC 60335-2-34 only need to be subjected to the following test: joints connecting to other parts of the refrigerating systems; chemical compatibility test for all gaskets (sight glass, etc.). NOTE Other qualification for this chemical compatibility done according to other standard are equivalent.
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FprEN 16084:2010 (E) 10 Table 3 — Requirements for the joining of components
Requirements tightness test 7.4 PTV- test
(pressure-temperature-vibration) 7.6 Operation simulation 7.7 Freezing test 7.8 Chemical compatibility with materials Vacuum test7.10 Additional test for hermetically sealed 7.9 Pressure test Fatigue test Joints and parts:
Permanent piping joints: brazing and welding Identical base materials YES NO NO NO NO NO NO NO Permanent piping joints: brazing and welding Different base materials YES YES NO NO NO NO NO NO Other permanent piping joints: e.g. glue, permanent compression fittings, expansion joints YES YES NO YES YES YES YES YES Non permanent piping joints YES YES YES YES YES, if sealing material YES Not applicable Not applicable Gaskets and sealing NO NO NO NO YES NO Not applicable Not applicable
kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 11 6 Requirements for hermetically sealed systems Hermetically sealed systems shall be constructed with components which have their tightness control level qualified as A1 or A2 as per Table 4 or Table 5. These components and joints shall be submitted to the relevant tests as specified in Tables 2 and 3. 7 Test procedures 7.1 General
The test characteristics to be applied to the components, joints and parts shall pass the qualification test for type approval of the tightness. The test procedures are shown in Figure 2.
Figure 2 — Test procedure 7.2 Sampling The largest, the smallest and any random samples in between of the product family shall be submitted to the test as required in Table 2 or Table 3. The samples used for pressure-temperature vibration test (7.6) and for operation simulation (7.7) shall be the same. For each of the other tests (7.8, 7.9, 7.10, 7.11, 7.12), different samples may be used. 7.3 Test temperature Test temperature (ambient and gas) shall be 15 °C to 35 °C, unless otherwise specified as the test conditions. kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 12 7.4 Tightness test 7.4.1 General The tightness of components and joints shall be tested. For pressure relief devices, P = 0,9 × Pset (+ 0/- 2) %; For all other components and joints P = PS (+ 0/- 2) % (PS = Maximum allowable pressure);
Q
≤ requirements for actual tightness control level A1 – A2 (hermetically sealed components) or B1 – B2 for all other components. The maximum required tightness control level are specified for Helium at 10 bar and + 20 °C as a reference. The actual tightness control levels can be calculated (e.g. other test fluids or pressures) by using the stated calculation formulas (Annex A). The maximum tightness control level depends on the size of the tested component or joint. Tightness control levels are specified in accordance with the joints used in Table 4. These are levels for each individual joint. Table 4 — Tightness control level according to joints nominal diameter
Joints
DN Tightness control levels Hermetically sealed joints≤ 50 A1 Closed joints ≤ 50 B1 Tightness control levels are specified in accordance with the components used in Table 5. These are levels for each individual component. Table 5 — Tightness control level according to components volume
Components Component Volume l Tightness control levels Hermetically sealed components0 up to 1,0 A1 > 1,0 A2 Closed components 0 up to 2,0 B1 Closed components > 2,0 up to 5,0 B2
The required tightness control level is stated in Table 5. The manufacturer can choose more stringent tightness control level if adequate. kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 13 Table 6 — Equivalence of test gas flow according to tightness control levels
Component type Tightness control level Qhe-ref helium reference leak +20 °C, 10 bar Pa·m3/s Equivalent air leak (Qair-ref) +20 oC, 10 bar Pa·m3/s Equivalent
iso-butane leak (mR600a) +20 oC, 10 bar
g/yr Hermetically sealed A1 ≤ 7,5 × 10-7 ≤ 8 × 10-7 ≤ 1,5 A2 ≤ 1 × 10-6 ≤ 11 × 10-7 ≤ 2,0 Closed B1 ≤ 1 × 10-6 ≤ 11 × 10-7 ≤ 2,0
B2 ≤ 2 × 10-6 ≤ 2,1 × 10-6 ≤ 4,0 NOTE The equivalent iso-butane leak is calculated as gas. At +20 °C and 10 bar iso-butane is in the liquid phase. See R600a in Table A.1.
7.4.2 Tightness control level NOTE EN 1779 gives guidance on the criteria for method and technique selection. 7.4.2.1 Test method The tightness control level of joints and components shown in Figures 4 and 5 shall be measured by an integration measured method, i.e. the sum of all leaks. It is preferable to use tracer gas technique as defined in EN 13185:2001, Clause 10. Tracer gas is admitted to the internal volume of the object and it is collected and detected a vacuum chamber. The following procedure shall be carried out to measure the tightness control level: connect the vacuum chamber to the detector; connect the component to the trace gas pressure generator (in the vacuum chamber) see drawing below; close the vacuum box and start the leak detector (and if it is needed add a vacuum pump); adjust and calibrate the leak detector according to EN 13185:2001, 9.1.1; measure the residual signal in the vacuum box and the component without helium pressure; adjust the test pressure in the component; measure the leak signal of the component; NOTE This signal is the total flow of the tracer gas from the component measured by the leak detector. calculate the leak level according to the formula given in EN 13185:2001, 9.2.6. If joints and/or components are tested together, the total level shall fulfil the most stringent tightness control level of the individual joint or component. kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 14
Key 1 tracer gas (PS) 2 vacuum 3 vacuum 4 mass spectrometric leak detector 5 test object 6 calibrated leak Figure 3 — Principle of tightness control - tracer gas
7.4.2.2 Alternative test methods Two alternative methods may be applied. a) Alternative method 1: The control by pressure technique by accumulation, in accordance with 10.4.1 of EN 13185:2001, could be a method to measure the leak rate of the component. b) Alternative method 2: Bubble test methods shown in Figure 4 can be acceptable for tightness control level B, provided that the method is capable to measure the actual leakage rate. The bubble test methods shall be carried out in accordance with EN 1593. The accuracy of the selected method shall be verified and be in compliance with the requirements for actual tightness control level. If this method is used, the following requirements shall be applied: 1) the test object shall be subjected to an internal air pressure = PS (maximum allowable pressure). Reduced pressure is not acceptable; 2) the test object shall be immersed in water;, 3) the test object shall be exposed to atmospheric pressure; 4) the test shall be performed at normal ambient temperature; 5) the period of time between bubbles leaving the test object shall be more than 60 s.
kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 15
Key 1 water 2 test object 3 air pressure (PS) Figure 4 — Principle of tightness control - Bubble method
7.5 Requirements for joints 7.5.1 Test samples All joints tested shall be tested in the final form as the customer receives the part. All joints shall be submitted to the tests as indicated in Table 3. 7.5.2 Torque Tube joints shall be tested both at the minimum torque Kmin and the maximum torque Kmax defined in Table 7. Table 7— Torque for the test, Kmin and Kmax
Kmin Kmax IF DKrel > or = 20 % Ko,min Ko,max IF 20 % > DKrel 0,8 × Ko,ave 1,2 × Ko,ave
7.5.3 Reusable joint If the joints to be tested are reusable, the following steps shall be taken before the test: a) fit the joints to tubes to be connected and tighten the joints to the maximum torque Kmax specified in Table 7; b) loosen the joints and take the tubes completely apart; c) repeat a) and b) four more times. 7.5.4 Requirements for hermetically sealed joints The joint shall not be opened without the use of special tools. NOTE Special tools are other than screw-drivers, parallel wrenches, simple gripping tool, etc. The joint shall not be reusable without replacing the sealing material in normal use. In case the sealing material is the tube, including that the tube is deformed during the sealing process, the deformed part of the tube shall not be reusable for sealing purpose. kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 16 7.6 Pressure temperature vibration tests (PTV) 7.6.1 General For pressure temperature vibration tests, method 1 or method 2 as described as follows shall be applied. The components or joints shall comply with one of the two methods described in 7.6.4 and 7.6.5 for combined cycle testing in order to qualify the tightness control level. 7.6.2 Samples For the combined cycle test, the number of samples is determined based on tightness control level according to Table 8. Table 8 — Test parameters Tightness control level Number of samples A1, B1 3 A2, B2 2
7.6.3 Test method 7.6.3.1 Equipment
Test equipment shall be composed of: a) a regulated enclosure for environment tests, able to maintain temperatures varying regularly between Tmin and Tmax;
b) a pressure device, connected to the joints, capable of producing a pressure that varies between Pmin and Pmax;
c) a vibration generator, to make the specified frequency and amplitude; d) a pressure control system capable to control the pressure with an accuracy of ± 5 %; e) a temperature control system capable of controlling the temperature inside of the test enclosure with an accuracy of ± 5 °C; f) a thermocouple capable to monitor the temperature (Tmax, Tmin) of the component or joint submitted to the test. The temperature sensor shall be adhered to the surface of the sample on the item with the biggest weight concentration of the pressure bearing part in order to assure that the sample has reached the defined temperature values. Where the pressure bearing part is made from metallic and non metallic materials, the sensor shall be fixed on the non metallic material. The sensor can be fixed to the sample by soldering or with adhesives, whichever is more appropriate, depending on the material of the sample. Another method, proven to have the same performance as the thermocouple can be applied; g) a cycle counter of temperature and pressure; h) test equipment to perform tightness test according to 7.4. kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 17 7.6.3.2 Test arrangements
The test samples shall be mounted as shown in Annex B in accordance with the number of joints to be tested and with the dimension of the climatic enclosure in which the tests are carried out.
The tube section shall have a diameter and dimensional tolerances such as specified by the manufacturer of the joint. The assembly of the joints on the tube shall be carried out following the fitting instructions of the manufacturer. For pressure test, one end of a tube shall be connected to the pressure generator; the other end shall be tightly closed. 7.6.4 Method 1: Combined pressure-temperature cycle test with integrated vibration test 7.6.4.1 General The samples (joints fitted on a tube) shall be submitted to a defined number n of cycles of temperature and pressure, between maximal values (Tmax, Pmax) and minimal values (Tmin, Pmin).
The test characteristics shall be applied to the components according to the Table 9. A typical temperature-pressure cycle is given in Figure 6. Principle PTV-test method 1
Key 1 temperature 2 pressure 3 vibration Figure 5 — Temperature-pressure cycle test kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 18 Table 9 — Test parameters
Parameters Value n 160 ntotal 5 × n Tmin Minimum temperature as specified by the manufacturer or - 40 °C if this is not specified Tmax Maximum temperature as specified by the manufacturer + 10 °C or 140 °C if this is not specified Pmin Atmospheric pressure Pmax
For safety valves, Pmax = 0,9 × Pset
For others components, 1,0 × PSa
f 200 Hz s 0,012 mm L 200 mm a 1,0 × PS is proposed because of safety issue for test on big component. The test fluid shall not be a liquid. 7.6.4.2 Procedure 7.6.4.2.1 Fit the test items on a test-rig in accordance with the instructions of the manufacturer.
7.6.4.2.2 Fix the test parameters (n, Tmax, Tmin, Pmax, Pmin, f, s) in accordance with Table 9. 7.6.4.2.3 Submit the test items to the test pressure according to Table 9.
7.6.4.2.4 Check the tightness of the joints by sniffing gas in order to detect leaks before test.
7.6.4.2.5 Tighten again the joints which leak according to the instructions of the manufacturer.
7.6.4.2.6 Place the test items in the climatic enclosure and submit them to n pressure and temperature cycles in accordance with Figure 6 and Table 9 and simultaneously submit the component assembly to the vibrations test of frequency f and displacement s.
7.6.4.2.7 Before the n pressure, temperature cycles and vibrations test, submit the joints to the operating cycle if it is needed according to Table 2, as described in 7.7. 7.6.4.2.8 Repeat the procedure of 7.6.4.2.6 and 7.6.4.2.7 five times in total.
7.6.4.2.9 Expose the joints to the tightness test as specified in 7.4. The pass fail criteria shall be the tightness control levels according to the test gas shown in Table 6. 7.6.5 Method 2: Combined pressure-temperature cycle test with a separate vibration test 7.6.5.1 General In contrast with method 1, the combined pressure-temperature cycle test shall be performed separately from the vibration test. kSIST FprEN 16084:2010
FprEN 16084:2010 (E) 19 7.6.5.2 Requirements for the combined pressure-temperature cycle test The samples shall be submitted to a defined number n1 of cycles of temperature and pressure, between maximal values (Tmax, Pmax) and minimal values (Tmin, Pmin), and n2 cycles of pressure between maximum value (Pmax) and minimum value (Pmin) with fixed temperature value (Tmax). The test characteristics to be applied to the components according to the Table 10. A typical temperature-pr
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