SIST EN 13786:2004

Automatic change-over valves having a maximum outlet pressure of up to and including 4 bar with a capacity of up to and including 100 kg/h, and their associated safety devices for butane, propane or their mixtures

This EN defines the constructional and operational characteristics, the safety requirements and test methods, the marking, of automatic change-over valves with a capacity of less than or equal to 100 kg/h and having a maximum outlet pressure of less than or equal to 4 bar for butane, propane or their mixtures only in the vapour phase and referred to in the body of the text as "change-over valves". NOTE 1 bar = 105 Pa. Liquefied gases containing methylacetylene and propadiene are not covered by this standard.

Automatische Umschaltventile mit einem höchsten Ausgangsdruck bis einschließlich 4 bar und einem Durchfluss bis einschließlich 100kg/h für Butan, Propan oder deren Gemische, sowie die dazugehörigen Sicherheitseinrichtungen

Diese Europäische Norm definiert die Bau- und Betriebseigenschaften, die Sicherheitsanforderungen und die Testverfahren und die Kennzeichnung von automatischen Umschaltventilen mit einem höchsten Ausgangsdruck bis einschließlich 4 bar und einem Durchfluss bis einschließlich 100 kg/h für Butan, Propan oder deren Gemische, sowie die dazugehörigen Sicherheitseinrichtungen in der Dampfphase.
ANMERKUNG   1 bar = 106 Pa
Flüssiggase die Methylazethylen und Propadien enthalten sind nicht von dieser Norm enthalten.
Diese Europäische Norm enthält auch Sicherheitseinrichtungen, die an automatischen Umschaltventilen montiert werden können. Die Eigenschaften dieser Einrichtungen sind in Anhang A beschrieben.
Die Anforderungen dieser Europäischen Norm beinhalten generell Konstruktionen, bei denen die Regelung in einer Stufe mit einer Membran erfolgt. Diese Anforderungen schließen Konstruktionen nicht aus, die mehr als eine Membran verwenden, vorausgesetzt, dass diese Membranen in einem einzigen Umschaltventil eingebaut sind und den Anforderungen dieser Europäischen Norm entsprechen.
Für die spezielle Anwendung in Caravans und Freizeitfahrzeugen kann die Umschaltfunktion der automatischen Umschaltventile auch durch eine Kombination von Reglern erfolgen, die ein System von automatischen Umschaltventilen bilden, das in 3.1.3 definiert ist. Diese Norm beinhaltet solche Systeme wie folgt:
- Spezielle Anforderungen für die Herstellung, die Justierung und den Betrieb von Reglern, die ein System von automatischen Umschaltventilen bilden, sowie die dazugehörigen Prüfmethoden sind in Anhang B enthalten;
- abgesehen von diesen speziellen Anforderungen und sofern nichts anderes vorgeschrieben ist, sind die Bau- und Funktionseigenschaften die im Text dieser Norm enthalten sind auch für die Einrichtungen von Anhang B anzuwenden.
Die Anforderungen gelten generell für automatischen Umschaltventile die in Gegenden benutzt werden, in denen die Temperatur bei der Benutzung zwischen -20 °C

Inverseurs automatiques de débit inférieur ou égal a 100 kg/h, a pression de détente nominale maximale inférieure ou égale a 4 bar, et leurs dispositifs de sécurité associés, pour butane, propane ou leurs mélanges

La présente Norme européenne définit les caractéristiques de construction et de fonctionnement, les spécifications et les techniques d'essai de sécurité, ainsi que le marquage des inverseurs automatiques d'un débit inférieur ou égal a 100 kg/h, a pression de détente inférieure ou égale a 4 bar, utilisés pour le butane, le propane ou leurs mélanges considérés uniquement a l'état gazeux.
NOTE   1 bar = 105 Pa.
Les gaz liquéfiés contenant du méthylacétylene et du propadiene ne sont pas couverts par cette norme.
La présente Norme européenne est également applicable aux dispositifs de sécurité qui sont susceptibles d'équiper les inverseurs visés par la présente norme. Les caractéristiques de ces dispositifs sont données dans l'Annexe A.
Les exigences de cette Norme européenne couvrent en général les conceptions dont la détente est a un étage, utilisant une seule membrane. Ces exigences n'excluent pas les conceptions utilisant plus d'une membrane, pourvu que ces membranes soient intégrées dans un seul inverseur automatique conforme aux exigences de cette Norme européenne.
Pour des utilisations spécifiques dans des caravanes et véhicules de loisirs, la fonction d'inversion automatique peut aussi etre réalisée par un assemblage de plusieurs détendeurs, formant un "systeme d'inversion automatique" tel que défini en 3.1.2. La présente norme s'applique a un tel ensemble de la façon suivante :
-   les exigences spécifiques pour la réalisation, le réglage et le fonctionnement des détendeurs constitués en systeme d'inversion automatique, de meme que les méthodes d'essai correspondantes sont données en Annexe B ;
-   hormis ces exigences spécifiques, et sauf indications contraires, les caractéristiques de construction et de fonctionnement listées dans le corps de la norme sont également applicables aux dispositifs de l'Annexe B.
Les exigences s'appliquent en général aux inverseurs automatiques utilisés dans les régions ou la température susceptible d'etre atteinte en service var

Samodejni preklopni ventili z največjim izhodnim tlakom do vključno 4 bar, s pretokom do vključno 100 kg/h in pripadajočimi varnostnimi napravami za butan, propan ali njuni zmesi

General Information

• Status: Withdrawn
• Publication Date: 31-May-2004
• Withdrawal Date: 15-Dec-2008
• ICS: 23.060.20 - Ball and plug valves
• Technical Committee: PLN - Gas appliances for domestic use
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 12-Dec-2008
• Due Date: 04-Jan-2009
• Completion Date: 16-Dec-2008
• Directive: 90/396/EEC - Appliances burning gaseous fuels
• Mandate: M/BC/CEN/89/6 - Standardization request to CEN concerning appliances burning gaseous fuels
• Ref Project: EN 13786:2004 - Automatic change-over valves having a maximum outlet pressure of up to and including 4 bar with a capacity of up to and including 100 kg/h, and their associated safety devices for butane, propane or their mixtures

Relations

• Revised: SIST EN 13786:2004/kprA1:2008 - Automatic change-over valves having a maximum outlet pressure of up to and including 4 bar with a capacity of up to and including 100 kg/h, and their associated safety devices for butane, propane or their mixtures
• Effective Date: 01-Jul-2006
• Consolidated By: SIST EN 13786:2004+A1:2009 - Automatic change-over valves having a maximum outlet pressure of up to and including 4 bar with a capacity of up to and including 100 kg/h, and their associated safety devices for butane, propane or their mixtures
• Effective Date: 18-Jan-2023
• Corrected By: SIST EN 13786:2004/AC:2005 - Automatic change-over valves having a maximum outlet pressure of up to and including 4 bar with a capacity of up to and including 100 kg/h, and their associated safety devices for butane, propane or their mixtures
• Effective Date: 01-Jun-2005
• Consolidated By: SIST EN 13786:2004+A1:2009 - Automatic change-over valves having a maximum outlet pressure of up to and including 4 bar with a capacity of up to and including 100 kg/h, and their associated safety devices for butane, propane or their mixtures
• Effective Date: 19-Jan-2023
• Replaced By: SIST EN 13786:2004+A1:2009 - Automatic change-over valves having a maximum outlet pressure of up to and including 4 bar with a capacity of up to and including 100 kg/h, and their associated safety devices for butane, propane or their mixtures
• Effective Date: 01-Jan-2009

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Automatic change-over valves having a maximum outlet pressure of up to and including 4 bar with a capacity of up to and including 100 kg/h, and their associated safety devices for butane, propane or their mixturesInverseurs automatiques de débit inférieur ou égal a 100 kg/h, a pression de détente nominale maximale inférieure ou égale a 4 bar, et leurs dispositifs de sécurité associés, pour butane, propane ou leurs mélangesAutomatische Umschaltventile mit einem höchsten Ausgangsdruck bis einschließlich 4 bar und einem Durchfluss bis einschließlich 100kg/h für Butan, Propan oder deren Gemische, sowie die dazugehörigen SicherheitseinrichtungenTa slovenski standard je istoveten z:EN 13786:2004SIST EN 13786:2004en,fr,de23.060.20ICS:SLOVENSKI
STANDARDSIST EN 13786:200401-junij-2004







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13786April 2004ICS 23.060.20English versionAutomatic change-over valves having a maximum outletpressure of up to and including 4 bar with a capacity of up toand including 100 kg/h, and their associated safety devices forbutane, propane or their mixturesInverseurs automatiques de débit inférieur ou égal à 100kg/h, à pression de détente maximale inférieure ou égale à4 bar, et leurs dispositifs de sécurité associés, pour butane,propane ou leurs mélangesAutomatische Umschaltventile mit einem höchstenAusgangsdruck bis einschließlich 4 bar und einemDurchfluss bis einschließlich 100kg/h für Butan, Propanoder deren Gemische, sowie die dazugehörigenSicherheitseinrichtungenThis European Standard was approved by CEN on 2 February 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13786:2004: E



EN 13786:2004 (E)2ContentspageForeword.51Scope.62Normative references.63Terms and definitions.73.1General terms and definitions.73.2Terms and definitions concerning gas.93.3Terms and definitions concerning pressures.93.4Terms and definitions concerning rates.104Types of automatic change over devices.114.1Introduction.114.2Automatic change over devices for installations where the final regulator supplies a pressurespecified in EN 437.114.3Other automatic change over devices installation.115Constructional characteristics.125.1General.125.2Materials.125.3Special requirements.135.3.1Pressure sensing subassembly.135.3.2Regulation subassembly.135.3.3Back pressure subassembly.135.3.4Connection subassembly.145.3.5Supply-reserve indicator.165.3.6Knob for selection of the operational cylinder.165.3.7Fixing onto a wall.165.4Mechanical strength.175.4.1Resistance to pressure.175.4.2Strength of connections.175.5Soundness.195.6Mechanical endurance.195.7Resistance to humidity changes.195.8Resistance to corrosion.196Performance characteristics.196.1General.196.1.1Introduction.196.1.2Supply pressure.206.2Operational limit characteristics (regulation function).206.3Operational limit characteristics (Change over function).216.3.1Gas flow safety.216.3.2Change over pressure.216.3.3Selection of the operating cylinder.217Test methods.217.1General conditions.217.1.1Type of test gas.217.1.2Test conditions.227.1.3Equivalence formulae.227.1.4Test samples.227.2Verification of constructional characteristics.237.2.1Resistance to pressure.237.2.2Mechanical strength of connections.24



EN 13786:2004 (E)37.2.3Regulation subassembly.247.2.4Soundness.257.2.5Endurance.257.2.6Resistance to humidity changes.267.2.7Resistance to corrosion.267.3Verification of performance characteristics.267.3.1General.267.3.2Plotting of regulation curves.308Marking, packaging, instructions.308.1General.308.2Marking of the device.308.3Packaging.308.4Instructions for use and maintenance.31Annex A (normative)
Special requirements for automatic change over devices fitted with pressure orrate operated safety valves.32A.1Change over devices fitted with an over-pressure relief.32A.1.1Definition.32A.1.2Constructional characteristics.32A.1.3Performance characteristics.32A.1.3.1Automatic change over devices having a maximum regulated pressure of up to and including150 mbar.32A.1.3.2Automatic change over devices having a maximum regulated pressure exceeding
150 mbar.32A.1.4Test methods.33A.1.4.1Automatic change over devices having a maximum regulated pressure of up to and including150 mbar.33A.1.4.2Automatic change over devices having a maximum regulated pressure exceeding
150 mbar.33A.1.5Automatic change over device marking.33A.2Automatic change over device fitted with an over-pressure shut off safety valve.33A.2.1Definition.33A.2.2Constructional characteristics.34A.2.2.1General.34A.2.2.2Closing force.34A.2.2.3Diaphragm strength.34A.2.3Performance characteristics.34A.2.3.1Automatic change over devices with a maximum regulated pressure of up to and including150 mbar.34A.2.3.2Automatic change over devices with a maximum regulated exceeding 150 mbar.34A.2.4Test methods.34A.2.4.1Test for the components transmitting the closing forces.34A.2.4.2Test for diaphragm strength.35A.2.4.3Performance test.35A.3Automatic change over device fitted with an under-pressure shut off safety device.35A.3.1Definition.35A.3.2Constructional and performance characteristics.35A.3.3Test methods.36A.4Automatic change over devices fitted with an excess flow valve.36A.4.1Definition.36A.4.2Performance characteristics.36A.4.3Complementary tests for the automatic change over devices – Test methods.37A.4.4User and maintenance instructions.37A.5Automatic change over devices fitted with a regulated pressure limiter.37A.5.1Definition.37A.5.2Constructional and performance characteristics.37A.5.3Test methods.38A.5.3.1Test conditions.38A.5.3.2Measurement of the maximum regulated pressure.38A.5.3.3Measurement of the pressure drop.38A.5.4Users and maintenance instructions.38Annex B (normative)
Special requirements for automatic change over devices and automatic changeover devices systems for caravans and leisure vehicles.39



EN 13786:2004 (E)4Annex C (normative)
Special requirements for low pressure automatic change over devices underextreme temperature conditions (temperatures below - 20 °C).41Annex D (normative)
Method for measuring leaks at test pressures less than or equal to 16 bar.42D.1Scope.42D.2Diagram of the test bench.42D.3Coefficient K.43D.3.1Method.43D.3.2Calculations.43D.4Measurement of the leak.43D.4.1Method.43D.4.2Calculations.43D.5Checks.44Annex E (normative)
Complementary test requirements for non metallic thermoplastic or thermalsetting materials used in the construction of automatic change over devices.45E.1Scope.45E.2Materials.45E.3Special conditions for carrying out the test mentioned in the body of the standard.45E.3.1Resistance to impact (see 5.4.1 and 7.2.1).45E.3.2Mechanical resistance of connections (see 5.4.2 and 7.2.2).45E.3.3Soundness (see 5.5 – 7.2.4).46E.4Special requirements.46E.4.1 Resistance to hydrocarbons.46E.4.2
Resistance to cracking under stress and when chemical agents are present.46E.4.3 Characteristics relating to fire resistance.46E.4.4 Accelerated ageing.47E.5Sampling and order of tests.47Annex F (normative)
Requirements for elastomeric reinforced diaphgrams.48Annex G (normative)
Inlet connections.49Annex H (normative)
Outlet connections.95Annex I (normative)
Test method for resistance to corrosion.127I.1Principle.127I.2Reagents.127I.2.1Saline solution.127I.2.2Compressed air.127I.2.3Salt mist.128I.3Apparatus.128I.3.1Spraying chamber.128I.3.2Sprayers.128I.3.3Heating device.129I.3.4Salt solution supply device.129I.3.5Compressed air supply device.129I.3.6Mist collectors.129I.4Test method.130I.4.1Method of exposure of automatic change over device.130I.4.2Duration of tests.130I.4.3Checks.130I.4.4Cleaning of automatic change over device.130I.5Results.130Annex ZA (informative)
Clauses of this European Standard addressing essential requirements orother provisions of EU Directives.133Bibliography.135



EN 13786:2004 (E)5ForewordThis document (EN 13786:2004) has been prepared by Technical Committee CEN/TC 181 "Dedicated liquefiedpetroleum gas appliances", the secretariat of which is held by AFNOR.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by October 2004, and conflicting national standards shall be withdrawn at the latestby October 2004.This document has been prepared under a mandate given to CEN by the European Commission and the EuropeanFree Trade Association, and supports essential requirements of EU Directive(s).For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.This European Standard covers only type testing.Items relating to quality assurance systems, production testing and particularly certificates of conformity are notcovered in this standard.This text is the third part of a series of standards covering different applications of the equipment considered. Twocomplementary documents have been elaborated:¾ EN 12864, Low pressure, non adjustable regulators having a maximum outlet pressure of less than or equal to200 mbar, with a capacity of less than or equal to 4 kg/h, and their associated safety devices, for butane,propane and their mixtures;¾ prEN 13785, Regulators with a capacity of up to and including 100 kg/h, having a maximum nominal outletpressure of up to and including 4 bar, other than those covered by EN 12864 and their associated safetydevices for butane, propane or their mixtures.The annexes A, B, C, D, E, F, G, H and I are normative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.



EN 13786:2004 (E)61 ScopeThis European Standard defines the constructional and operational characteristics, the safety requirements andtest methods, and the marking of automatic change over devices with a capacity of less than or equal to 100 kg/hand having a maximum regulated pressure of less than or equal to 4 bar for butane, propane or their mixtures onlyin the vapour phase.NOTE1 bar = 105 PaLiquefied gases containing methylacetylene and propadiene are not covered by this standard.This European Standard also covers safety devices likely to be fitted onto automatic change over devices. Thecharacteristics of these devices are given in annex A.The requirements of this European Standard generally cover designs where regulation is in one stage, using asingle diaphragm. These requirements do not exclude designs using more than one diaphragm, provided thatthese diaphragms are integrated in a single automatic change over devices complying with the requirements of thisEuropean Standard.For specific uses in caravans and leisure vehicles, the automatic change over devices function may also be carriedout by an assembly of regulators, forming a "automatic change over devices sys
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