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UNI EN 13785 : 2009

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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
Superseded date

07-04-2013

Published date

01-01-2009

Foreword
1 Scope
2 Normative references
3 Terms and definitions
  3.1 General terms and definitions
  3.2 Terms and definitions concerning gas
  3.3 Terms and definitions concerning pressures
  3.4 Terms and definitions concerning rates
4 Types of regulators
  4.1 Introduction
  4.2 Regulators for installations where the final
      regulator supplies a pressure specified in
      EN 437
  4.3 Other regulators
5 Constructional characteristics
  5.1 General
  5.2 Materials
  5.3 Special requirements
      5.3.1 Pressure sensing subassembly
      5.3.2 Regulation subassembly
      5.3.3 Back pressure subassembly
      5.3.4 Connection subassembly
  5.4 Mechanical strength
      5.4.1 Resistance to impact
      5.4.2 Resistance to pressure
      5.4.3 Strength of connections
  5.5 Soundness
  5.6 Mechanical endurance
      5.6.1 General requirements
      5.6.2 Special requirements
  5.7 Resistance to humidity changes
  5.8 Resistance to corrosion
6 Performance characteristics
  6.1 General
      6.1.1 Introduction
      6.1.2 Supply pressure
      6.1.3 Regulated pressure
  6.2 Supply pressure and regulated pressure
      according to 4.2
      6.2.1 Single stage fixed regulator for
            EN 437 pressures
      6.2.2 Two stages fixed or adjustable
            regulators for EN 437 pressures
      6.2.3 Three stages fixed or adjustable
            regulators for EN 437 pressures
  6.3 Variable regulators
  6.4 Regulators out of the pressures of EN 437
7 Test methods
  7.1 General conditions
      7.1.1 Type of test gas
      7.1.2 Test conditions
      7.1.3 Equivalence formulas
      7.1.4 Test samples
  7.2 Verification of constructional characteristics
      7.2.1 Resistance to impact
      7.2.2 Resistance to pressure
      7.2.3 Mechanical strength of connections
      7.2.4 Regulation subassembly
      7.2.5 Soundness
      7.2.6 Mechanical endurance
      7.2.7 Resistance to humidity changes
      7.2.8 Resistance to corrosion
  7.3 Verification of performance characteristics
      7.3.1 General
      7.3.2 Plotting of the performance curves
8 Marking, packaging, instructions
  8.1 General
  8.2 Marking of the regulator
  8.3 Packaging
  8.4 Instructions for installation, use and maintenance
Annex A (normative) - Special requirements for regulators
        fitted with pressure or rate operated safety
        devices
      A.1 Regulators fitted with an over-pressure relief
          A.1.1 Definition
          A.1.2 Constructional characteristics
          A.1.3 Performance characteristics
          A.1.4 Test methods
          A.1.5 Regulator marking
      A.2 Regulators fitted with an over-pressure shut
          off safety valve
          A.2.1 Definition
          A.2.2 Constructional characteristics
          A.2.3 Performance characteristics
          A.2.4 Test methods
      A.3 Regulators fitted with an under-pressure shut
          off safety device
          A.3.1 Definition
          A.3.2 Constructional and performance
                characteristics
          A.3.3 Test methods
      A.4 Regulators fitted with an excess flow valve
          A.4.1 Definition
          A.4.2 Performance characteristics
          A.4.3 Test methods
          A.4.4 User and maintenance instructions
      A.5 Regulators fitted with a regulated pressure
          limiter
          A.5.1 Definition
          A.5.2 Constructional and performance
                characteristics
          A.5.3 Test methods
          A.5.4 User and maintenance instructions
Annex B (normative) - Special requirements for
        regulators fitted with a thermal cut out
      B.1 Definition
      B.2 Constructional characteristics
      B.3 Performance characteristics
      B.4 Test methods
Annex C (normative) - Special requirements for low
        pressure regulators under extreme temperature
        conditions (temperatures below -20 degrees C)
Annex D (normative) - Method for measuring leaks at
        test pressures less than or equal to 16 bar
      D.1 Scope
      D.2 Diagram of the test bench
      D.3 Coefficient K
          D.3.1 Method
          D.3.2 Calculations
      D.4 Measurement of the leak
          D.4.1 Method
          D.4.2 Calculations
      D.5 Checks
Annex E (normative) - Complementary test requirements
        for non metallic thermoplastic or thermal
        setting materials used in the construction
        of regulators
      E.1 Scope
      E.2 Materials
      E.3 Special conditions for carrying out the
          tests mentioned in the body of the document
          E.3.1 Resistance to impact
          E.3.2 Mechanical resistance of connections
          E.3.3 Soundness
      E.4 Special requirements
          E.4.1 Resistance to hydrocarbons
          E.4.2 Resistance to cracking under stress
                and when chemical agents are present
          E.4.3 Characteristics relating to fire
                resistance
          E.4.4 Accelerated ageing
      E.5 Sampling and order of tests
Annex F (normative) - Requirements for elastomeric
        reinforced diaphragms
Annex G (normative) - Inlet connections
Annex H (normative) - Outlet connections
Annex I (informative) - Test method for resistance
        to corrosion
      I.1 Principle
      I.2 Reagents
          I.2.1 Saline solution
          I.2.2 Compressed air
          I.2.3 Salt mist
      I.3 Apparatus
          I.3.1 Spraying chamber
          I.3.2 Sprayers
          I.3.3 Heating device
          I.3.4 Salt solution supply device
          I.3.5 Compressed air supply device
          I.3.6 Mist collectors
      I.4 Test method
          I.4.1 Method of exposure of regulators
          I.4.2 Duration of tests
          I.4.3 Checks
          I.4.4 Cleaning of regulators
      I.5 Results
Annex ZA (informative) - Relationship between this
         European Standard and the Essential Requirements
         of EU Directive 90/396/EEC
Bibliography

Describes the constructional and operational characteristics, the safety requirements, test methods and 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.

DocumentType
Standard
PublisherName
Ente Nazionale Italiano di Unificazione (UNI)
Status
Superseded
SupersededBy
Supersedes

EN 12864:2001/A3:2009 LOW-PRESSURE, NON ADJUSTABLE REGULATORS HAVING A MAXIMUM OUTLET PRESSURE OF LESS THAN OR EQUAL TO 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
ISO 7005-2:1988 Metallic flanges — Part 2: Cast iron flanges
ISO 8434-1:2007 Metallic tube connections for fluid power and general use Part 1: 24 degree cone connectors
EN ISO 180:2000/A2:2013 PLASTICS - DETERMINATION OF IZOD IMPACT STRENGTH (ISO 180:2000/AMD 2:2013)
EN ISO 4892-3:2016 Plastics - Methods of exposure to laboratory light sources - Part 3: Fluorescent UV lamps (ISO 4892-3:2016)
ISO 565:1990 Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of openings
EN ISO 178:2010/A1:2013 PLASTICS - DETERMINATION OF FLEXURAL PROPERTIES (ISO 178:2010/AMD 1:2013)
EN ISO 3166-1:2014 Codes for the representation of names of countries and their subdivisions - Part 1: Country codes (ISO 3166-1:2013)
EN ISO 228-1:2003 Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation (ISO 228-1:2000)
ISO 7-1:1994 Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation
EN 437:2003+A1:2009 Test gases - Test pressures - Appliance categories
ISO 180:2000 Plastics Determination of Izod impact strength
ISO 4892-3:2016 Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps
IEC 60695-11-10:2013 Fire hazard testing - Part 11-10: Test flames - 50 W horizontal and vertical flame test methods
EN 13786:2004+A1:2008 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
EN ISO 8434-1:2007/AC:2009 METALLIC TUBE CONNECTIONS FOR FLUID POWER AND GENERAL USE - PART 1: 24 DEGREE CONE CONNECTORS
EN 12164:2016 Copper and copper alloys - Rod for free machining purposes
ISO 9227:2017 Corrosion tests in artificial atmospheres — Salt spray tests
ISO 3166-1:2013 Codes for the representation of names of countries and their subdivisions Part 1: Country codes
EN 549:1994 Rubber materials for seals and diaphragms for gas appliances and gas equipment
EN 12165:2016 COPPER AND COPPER ALLOYS - WROUGHT AND UNWROUGHT FORGING STOCK
ISO 301:2006 Zinc alloy ingots intended for castings
ISO 178:2010 Plastics Determination of flexural properties
ISO 228-1:2000 Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation

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