EN 13786:2004+A1:2008
(Main + Amendment)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
General Information
- Abstract
This European Standard defines the constructional and operational characteristics, the safety requirements and test methods, and the marking of automatic change over devices with a capacity of less than or equal to 100 kg/h and having a maximum regulated pressure of less than or equal to 4 bar for butane, propane or their mixtures only in the vapour phase.
NOTE 1 bar = 105 Pa.
Liquefied 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. The characteristics of these devices are given in annex A.
The requirements of this European Standard generally cover designs where regulation is in one stage, using a single diaphragm. These requirements do not exclude designs using more than one diaphragm, provided that these diaphragms are integrated in a single automatic change over devices complying with the requirements of this European Standard.
For specific uses in caravans and leisure vehicles, the automatic change over devices function may also be carried out by an assembly of regulators, forming a "automatic change over devices system" as defined in 3.1.2. This standard covers such an assembly as follows:
- special requirements for the manufacture, adjustment and operation of regulators forming a automatic change over devices system, as well as the corresponding test methods are given in annex B;
- except for these special requirements, and unless otherwise stated, constructional and performance characteristics given in the body of the standard are also applicable to the devices in annex B.
The requirements apply generally to automatic change over device used in locations where the temperature likely to be reached during use is between -20 °C and +50 °C. When the devices are used at temperatures outside this range they shall comply with special requirements defined in annex C.
This standard does not include the installation rules
- Status
- Withdrawn
- Publication Date
- 04-Nov-2008
- Withdrawal Date
- 11-Jun-2013
- Technical Committee
- CEN/TC 181 - Dedicated liquified petroleum gas appliances
- Drafting Committee
- CEN/TC 181/WG 8 - Pressure regulators and changeover devices
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 12-Jun-2013
- Completion Date
- 12-Jun-2013
- Directive
- Not Harmonized2009/142/EC - Appliances burning gaseous fuelsOJ Ref: C, C 349 OJ Date: 22-Dec-2010
Not Harmonized90/396/EEC - Appliances burning gaseous fuels
Relations
- Effective Date
- 19-Jan-2023
- Effective Date
- 19-Jan-2023
- Effective Date
- 22-Dec-2008
- Effective Date
- 08-Jun-2022
- Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Effective Date
- 28-Jan-2026
- Refers
EN ISO 9227:2022 - Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227:2022) - Effective Date
- 28-Jan-2026
- Refers
prEN 15116 - Ventilation in buildings - Chilled beams - Testing and rating of active chilled beams - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
EN 13786:2004+A1:2008 is a standard published by the European Committee for Standardization (CEN). Its full title is "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 standard covers: This European Standard defines the constructional and operational characteristics, the safety requirements and test methods, and the marking of automatic change over devices with a capacity of less than or equal to 100 kg/h and having a maximum regulated pressure of less than or equal to 4 bar for butane, propane or their mixtures only in the vapour phase. NOTE 1 bar = 105 Pa. Liquefied 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. The characteristics of these devices are given in annex A. The requirements of this European Standard generally cover designs where regulation is in one stage, using a single diaphragm. These requirements do not exclude designs using more than one diaphragm, provided that these diaphragms are integrated in a single automatic change over devices complying with the requirements of this European Standard. For specific uses in caravans and leisure vehicles, the automatic change over devices function may also be carried out by an assembly of regulators, forming a "automatic change over devices system" as defined in 3.1.2. This standard covers such an assembly as follows: - special requirements for the manufacture, adjustment and operation of regulators forming a automatic change over devices system, as well as the corresponding test methods are given in annex B; - except for these special requirements, and unless otherwise stated, constructional and performance characteristics given in the body of the standard are also applicable to the devices in annex B. The requirements apply generally to automatic change over device used in locations where the temperature likely to be reached during use is between -20 °C and +50 °C. When the devices are used at temperatures outside this range they shall comply with special requirements defined in annex C. This standard does not include the installation rules
This European Standard defines the constructional and operational characteristics, the safety requirements and test methods, and the marking of automatic change over devices with a capacity of less than or equal to 100 kg/h and having a maximum regulated pressure of less than or equal to 4 bar for butane, propane or their mixtures only in the vapour phase. NOTE 1 bar = 105 Pa. Liquefied 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. The characteristics of these devices are given in annex A. The requirements of this European Standard generally cover designs where regulation is in one stage, using a single diaphragm. These requirements do not exclude designs using more than one diaphragm, provided that these diaphragms are integrated in a single automatic change over devices complying with the requirements of this European Standard. For specific uses in caravans and leisure vehicles, the automatic change over devices function may also be carried out by an assembly of regulators, forming a "automatic change over devices system" as defined in 3.1.2. This standard covers such an assembly as follows: - special requirements for the manufacture, adjustment and operation of regulators forming a automatic change over devices system, as well as the corresponding test methods are given in annex B; - except for these special requirements, and unless otherwise stated, constructional and performance characteristics given in the body of the standard are also applicable to the devices in annex B. The requirements apply generally to automatic change over device used in locations where the temperature likely to be reached during use is between -20 °C and +50 °C. When the devices are used at temperatures outside this range they shall comply with special requirements defined in annex C. This standard does not include the installation rules
EN 13786:2004+A1:2008 is classified under the following ICS (International Classification for Standards) categories: 23.060.20 - Ball and plug valves. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 13786:2004+A1:2008 has the following relationships with other standards: It is inter standard links to EN 13786:2004, EN 13786:2004/prA1, EN 13786:2004/AC:2004, EN 16129:2013, ISO 7005-2:1988, ISO 565:1990, ISO 7-1:1994, ISO 301:2006, EN 12165:2024, EN ISO 9227:2022, prEN 15116, EN 437:2003, EN ISO 3166-1:2020, EN ISO 178:2019, EN 12503-2:2001. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 13786:2004+A1:2008 is associated with the following European legislation: EU Directives/Regulations: 2009/142/EC, 90/396/EEC; Standardization Mandates: M/BC/CEN/89/6. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN 13786:2004+A1:2008 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Automatische Umschaltventile 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 SicherheitseinrichtungenInverseurs automatiques de débit inférieur ou égal à 100 kg/h, à pression de détente nominale maximale inférieure ou égale à 4 bar, et leurs dispositifs de sécurité associés, pour butane, propane ou leurs mélangesAutomatic 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 mixtures23.060.20Zapirni ventili (kroglasti in pipe)Ball and plug valvesICS:Ta slovenski standard je istoveten z:EN 13786:2004+A1:2008SIST EN 13786:2004+A1:2009en01-januar-2009SIST EN 13786:2004+A1:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13786:2004+A1
November 2008 ICS 23.060.20 Supersedes EN 13786:2004English Version
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
Inverseurs automatiques de débit inférieur ou égal à 100 kg/h, à pression de détente nominale maximale inférieure ou égale à 4 bar, et leurs dispositifs de sécurité associés, pour butane, propane ou leurs mélanges
Automatische Umschaltventile 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 This European Standard was approved by CEN on 2 February 2004 and includes Corrigendum 1 issued by CEN on 25 August 2004 and Amendment 1 approved by CEN on 27 September 2008.
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 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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: rue de Stassart, 36
B-1050 Brussels © 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13786:2004+A1:2008: ESIST EN 13786:2004+A1:2009
Special requirements for automatic change over devices fitted with pressure or rate operated safety valves.33 A.1 Change over devices fitted with an over-pressure relief.33 A.1.1 Definition.33 A.1.2 Constructional characteristics.33 A.1.3 Performance characteristics.33 A.1.3.1 Automatic change over devices having a maximum regulated pressure of up to and including 150 mbar.33 A.1.3.2 Automatic change over devices having a maximum regulated pressure exceeding
150 mbar.33 A.1.4 Test methods.34 A.1.4.1 Automatic change over devices having a maximum regulated pressure of up to and including 150 mbar.34 A.1.4.2 Automatic change over devices having a maximum regulated pressure exceeding
150 mbar.34 A.1.5 Automatic change over device marking.34 A.2 Automatic change over device fitted with an over-pressure shut off safety valve.34 A.2.1 Definition.34 A.2.2 Constructional characteristics.35 A.2.2.1 General.35 A.2.2.2 Closing force.35 A.2.2.3 Diaphragm strength.35 A.2.3 Performance characteristics.35 A.2.3.1 Automatic change over devices with a maximum regulated pressure of up to and including 150 mbar.35 A.2.3.2 Automatic change over devices with a maximum regulated exceeding 150 mbar.35 A.2.4 Test methods.35 A.2.4.1 Test for the components transmitting the closing forces.35 A.2.4.2 Test for diaphragm strength.36 A.2.4.3 Performance test.36 A.3 Automatic change over device fitted with an under-pressure shut off safety device.36 A.3.1 Definition.36 A.3.2 Constructional and performance characteristics.36 A.3.3 Test methods.37 A.4 Automatic change over devices fitted with an excess flow valve.37 A.4.1 Definition.37 A.4.2 Performance characteristics.37 A.4.3 Complementary tests for the automatic change over devices – Test methods.38 A.4.4 User and maintenance instructions.38 A.5 Automatic change over devices fitted with a regulated pressure limiter.38 A.5.1 Definition.38 A.5.2 Constructional and performance characteristics.38 A.5.3 Test methods.39 A.5.3.1 Test conditions.39 A.5.3.2 Measurement of the maximum regulated pressure.39 A.5.3.3 Measurement of the pressure drop.39 A.5.4 Users and maintenance instructions.39 Annex B (normative)
!Special requirements for automatic change over devices and automatic change over device systems for caravans, motor caravans or fresh water boats.40 SIST EN 13786:2004+A1:2009
Special requirements for low pressure automatic change over devices under extreme temperature conditions (temperatures below - 20 °C).42 Annex D (normative)
Method for measuring leaks at test pressures less than or equal to 16 bar.43 D.1 Scope.43 D.2 Diagram of the test bench.43 D.3 Coefficient K.44 D.3.1 Method.44 D.3.2 Calculations.44 D.4 Measurement of the leak.44 D.4.1 Method.44 D.4.2 Calculations.44 D.5 Checks.45 Annex E (normative)
Complementary test requirements for non metallic thermoplastic or thermal
setting materials used in the construction of automatic change over devices.46 E.1 Scope.46 E.2 Materials.46 E.3 Special conditions for carrying out the test mentioned in the body of the standard.46 E.3.1 Resistance to impact (see 5.4.1 and 7.2.1).46 E.3.2 Mechanical resistance of connections (see 5.4.2 and 7.2.2).46 E.3.3 Soundness (see 5.5 – 7.2.4).47 E.4 Special requirements.47 E.4.1
Resistance to hydrocarbons.47 E.4.2 Resistance to cracking under stress and when chemical agents are present.47 E.4.3
Characteristics relating to fire resistance.47 E.4.4
Accelerated ageing.48 E.5 Sampling and order of tests.48 Annex F (normative)
Requirements for elastomeric reinforced diaphgrams.49 Annex G (normative)
Inlet connections.50 Annex H (normative)
Outlet connections.99 Annex I (normative)
Test method for resistance to corrosion.133 I.1 Principle.133 I.2 Reagents.133 I.2.1 Saline solution.133 I.2.2 Compressed air.133 I.2.3 Salt mist.134 I.3 Apparatus.134 I.3.1 Spraying chamber.134 I.3.2 Sprayers.134 I.3.3 Heating device.135 I.3.4 Salt solution supply device.135 I.3.5 Compressed air supply device.135 I.3.6 Mist collectors.135 I.4 Test method.136 I.4.1 Method of exposure of automatic change over device.136 I.4.2 Duration of tests.136 I.4.3 Checks.136 I.4.4 Cleaning of automatic change over device.136 I.5 Results.136 Annex J (normative)
!Automatic change over device and change over device systems for LPG cylinders to supply appliances installed in seawater boats.139 J.1 Scope.139 J.2 General.139 J.3 Maximum guaranteed rate.139 J.4 Change over device and change over device systems fitted with a pressure relief valve.139 J.5 Vent.139 J.6 Connections.139 J.7 Material.139 J.8 Resistance to corrosion.140 SIST EN 13786:2004+A1:2009
Clauses of this European Standard addressing essential requirements or
other provisions of EU Directives.141 Bibliography.143
200 mbar, with a capacity of less than or equal to 4 kg/h, and their associated safety devices for butane, propane or their mixtures !EN 13785", Regulators with a capacity of up to and including 100 kg/h, having a maximum nominal outlet pressure of up to and including 4 bar, other than those covered by EN 12864 and their associated safety devices for butane, propane or their mixtures EN ISO 75-3, Determination of temperature of deflection under load EN ISO 178, Plastics – Determination of flexural properties (ISO 178:2001) EN ISO 180, Plastics – Determination of Izod impact strength (ISO 180:2000) EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) EN ISO 527-4, Plastics – Determination of tensile properties EN ISO 3166-1, Codes for the representation of names of countries and their subdivision – Part 1: Country codes (ISO 3166-1:1997) EN ISO 4892-3, Plastics – Methods of exposure to laboratory light sources – Part 3: Fluorescent UV lamps
(ISO 4892-3:1994) !EN ISO 7253, Paints and varnishes - Determination of resistance to neutral salt spray (fog)" EN ISO 9773, Plastics - Determination of burning behaviour of thin flexible vertical specimens in contact with a small-flame ignition source (ISO 9773:1998) ISO 7-1, Pipe threads where pressure-tight joints are made on the threads – Part 1: Dimensions, tolerances and designation ISO 301, Zinc alloy ingots intended for casting ISO 565, Test sieves – Metal wire cloth, perforated metal plate and electroformed sheet – Nominal sizes of openings ISO 7005-2, Metallic flanges – Part 2: Cast iron flanges SIST EN 13786:2004+A1:2009
Key 1 Pressure sensing subassembly
2 Regulation subassembly
3 Back pressure subassembly
4 Mechanical connection subassembly
5 Connection subassembly
Figure 1 — Diagram of an automatic change over devices SIST EN 13786:2004+A1:2009
3.3.6 maximal admitted pressure pMp maximal value of the regulated pressure delivered by the automatic change over device for all values of the supply pressure and all values of the flow rate in the operational area
3.3.7 change over nominal pressure pdi value of the nominal regulated pressure of the change over function, in case of two stages automatic change over devices, integrating a change over function and a regulator 3.4 Terms and definitions concerning rates 3.4.1 guaranteed rate Mg mass flow of gas that can be obtained, for any value of the supply pressure, at the "working" and "reserve" pressures between the specified limits NOTE The guaranteed rate is expressed in grams per hour (g/h). SIST EN 13786:2004+A1:2009
Single stage automatic change over devices • the supply pressure of the automatic change over device is equal to the pressure of the LPG supply containers; • the automatic change over device supplies a gas appliance. 2 – Two or more stages:
First stage automatic
Regulator
change over device • the supply pressure of the automatic change over devices is equal to the pressure of the LPG supply containers; • the supply pressure of the regulator depends on the regulated pressure of the automatic change over device and on the pressure losses in the intermediate line; • this regulator, covered by !EN 13785", supplies a gas appliance or another regulator. 4.2 Automatic change over devices for installations where the final regulator supplies a pressure specified in EN 437 Where an automatic change over device is a
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