EN 13785:2005/prA1

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

This standard defines the constructional and operational characteristics, the safety requirements and test methods, the marking of regulators having a capacity of less than or equal to 100 kg/h, other than the regulators covered by EN 12864, for butane, propane or their mixtures, in the gaseous phase. Regulators for caravans up to 1,5 kg/h are covered by EN 12864.
NOTE 1 bar = 105 Pa
This European standard also applies to the safety devices which are included within regulators covered by this standard. The characteristics of these devices are given in annexes A and B.

Druckregelgeräte mit einem höchsten Ausgangsdruck bis einschließlich 4 bar und einem Durchfluss bis einschließlich 100 kg/h, die nicht in EN 12864 behandelt sind, für Butan, Propan oder deren Gemische sowie die dazugehörigen Sicherheitseinrichtungen

Détendeurs de débit inférieur ou égal à 100 kg/h, à pression de détente nominale maximale inférieure ou égale à 4 bar, autres que les détendeurs relevant de l'EN 12864, et leurs dispositifs de sécurité associés pour butane, propane ou leurs mélanges

Regulatorji s pretokom do vključno 100 kg/h z največjim imenskim izhodnim tlakom do vključno 4 bar, ki niso vključeni v SIST EN 12864, in s pripadajočimi varnostnimi napravami za butan, propan ali njuni zmesi - Dopolnilo A1

General Information

• Status: Not Published
• ICS: 23.060.40 - Pressure regulators
• Technical Committee: CEN/TC 181 - Dedicated liquified petroleum gas appliances
• Drafting Committee: CEN/TC 181/WG 8 - Pressure regulators and changeover devices
• Current Stage: 5060 - Closure of Vote - Formal Approval
• Start Date: 26-Aug-2008
• Due Date: 24-Mar-2008
• Completion Date: 26-Aug-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: SIST EN 13785:2005/kprA1:2008 - 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

Relations

• Merged Into: EN 13785:2005+A1:2008 - 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
• Effective Date: 19-Jan-2023
• Amends: EN 13785:2005 - 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
• Effective Date: 22-Dec-2008

Overview

EN 13785:2005/prA1 is a CEN draft amendment defining the constructional, operational and safety requirements for gas pressure regulators with a capacity of up to and including 100 kg/h and a maximum nominal outlet pressure of up to and including 4 bar, for butane, propane or their mixtures in the gaseous phase. The standard also covers associated safety devices incorporated in those regulators (see Annexes A and B). Regulators for caravans up to 1.5 kg/h are excluded (covered by EN 12864). Note: 1 bar = 10^5 Pa.

Keywords: EN 13785, LPG regulators, butane regulator, propane regulator, pressure regulator, safety devices, CEN standard.

Key Topics and Requirements

• Scope and applicability
  • Regulators ≤100 kg/h and nominal outlet pressure ≤4 bar for LPG (butane/propane/mixtures).
  • Includes integrated safety devices and their characteristics (Annexes A & B).
• Definitions and interfaces
  • Clarified definitions such as quick coupling, tap (manual closing device), self-closing valve, and freely rotating outlet connection.
• Materials
  • Zinc alloys limited to Zn Al4 or Zn Al4 Cu1 (ISO 301); brass to EN 12164/EN 12165.
  • Non-metallic components allowed only if not exposed to temperatures above 80 °C.
• Mechanical design and connections
  • Threaded seals allowed up to nominal diameter DN50; parallel internal threads in zinc/aluminium permitted up to DN10.
  • Country-specific inlet/outlet thread and non-threaded connection tables (Annex G/H) detail national practices.
• Adjustment and tamper-control
  • Adjuster cannot be removed except when in the minimum-pressure position; rotational adjustment increases pressure clockwise.
• Performance and testing
  • Impact resistance requirements for cylinder-mounted regulators (must survive specified fall and continue to operate).
  • Endurance test limits: closing pressure change within ±5% and regulation curves must remain within specified envelope.
• Safety device performance
  • Devices must cut off flow only when downstream pressure meets or exceeds the minimum inlet pressure required by the device.

Applications

• Design, manufacture and certification of LPG pressure regulators for domestic, commercial and light industrial uses where capacities ≤100 kg/h apply.
• Selection and testing of regulators mounted on LPG cylinders or fitted into gas distribution equipment.
• Product compliance documentation for market access within CEN member states.

Who Should Use This Standard

• Regulator and valve manufacturers
• Test laboratories and conformity assessment bodies
• Gas appliance designers and OEMs (LPG systems)
• Safety and compliance engineers, installers and distributors
• National standardization and regulatory authorities

Related Standards

• EN 12864 (caravan regulators ≤1.5 kg/h)
• EN 13786 (related CEN/TC 181 work)
• EN 12164 / EN 12165 (copper/brass material specs)
• EN ISO 7253 (salt spray corrosion testing)

This standard is essential for ensuring safe, interoperable and market-compliant LPG regulators across Europe.

Standards Content (Sample)

SLOVENSKI SIST EN
13785:2005/oprA1:2006
PREDSTANDARD
julij 2006
Regulatorji s pretokom do vključno 100 kg/h z največjim imenskim izhodnim
tlakom do vključno 4 bar, ki niso vključeni v SIST EN 12864, in s pripadajočimi
varnostnimi napravami za butan, propan ali njuni zmesi - Dopolnilo A1
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 - Amendment A1
ICS 23.060.40 Referenčna številka
SIST EN 13785:2005/oprA1:2006(en)
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD
DRAFT
EN 13785:2005
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
May 2006
ICS
English Version
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
Détendeurs de débit inférieur ou égal à 100 kg/h, à Druckregelgeräte mit einem höchsten Ausgangsdruck bis
pression de détente nominale maximale inférieure ou égale einschließlich 4 bar und einem Durchfluss bis einschließlich
à 4 bar, autres que les détendeurs relevant de l'EN 12864, 100 kg/h, die nicht in EN 12864 geregelt sind, für Butan,
et leurs dispositifs de sécurité associés pour butane, Propan oder deren Gemische sowie die dazugehörigen
propane ou leurs mélanges Sicherheitseinrichtungen
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 181.
This draft amendment A1, if approved, will modify the European Standard EN 13785:2005. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.
This draft amendment 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 Management Centre has the same status
as the official versions.
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, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13785:2005/prA1:2006: E
worldwide for CEN national Members.

Foreword
This document (EN 13785:2005/prA1:2006) has been prepared by Technical Committee CEN/TC 181 “Dedicated
liquified petroluem gas appliances”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document has been elaborated mainly in order to :
- address the comments received during the formal vote on EN 13785:2005 and that was not taken into account
in the published version;
- take into account evolution of other standards written by CEN/TC 181WG8 (EN 12864, EN 13786 and their
amendments);
- include new CEN Members.
This document modifies or completes relevant clauses of EN 13785:2005, only the modified or completed clauses
are mentioned.
2. Normative references
Add the following normative references
EN 12164, Copper and copper alloys - Rod for free machining purposes
EN 12165, Copper and copper alloys - Wrought and unwrought forging stock
EN ISO 7253, Paints and varnishes - Determination of resistance to neutral salt spray (fog)
3.1.5
quick coupling
Replace the text of the definition by the following one:
"connection system which allows the fitting of the regulator to the cylinder valve without a threaded
connection and without using tools"
3.1.6
tap
Replace the definition by the following one:
"3.1.6
tap (manual closing device)
device for closing the gas flow which requires an intentional manual action (for example on a lever, a
knob)"
3.1.7
self closing valve
Replace the definition by the following one:
"device allowing the automatic shut off of the gas flow, by simple disconnection of the regulator from the
cylinder valve"
Add the new following definition:
"3.1.11
freely rotating outlet connection
integral outlet connection designed to fully rotate "
5.1 General
th
Replace the last but one (12 ) paragraph by the following one:
"It shall not be possible to remove the adjuster unless it is in the position giving the minimum pressure.
When adjustment is carried out by rotation, the higher regulated pressures shall be obtained by rotation
clockwise."
5.2 Materials
th
Replace the 5 paragraph by the two following paragraphs:
"Zinc alloys shall only be used if they are of the Zn Al4 or Zn Al4 Cu1 quality, in accordance with ISO 301.
Brass alloys shall comply with EN 12164 or EN 12165.
Components made of non- metallic materials shall only be used if they are not submitted to a temperature
higher than 80 °C."
5.3.4.1 General
nd
Replace the 2 dash by the following:
"threaded: threaded connections where the seal is made on the thread may be used up to a nominal
diam
...