BS EN 13786 : 2004
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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
Hardcopy , PDF
08-31-2013
English
01-01-2004
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 automatic change over devices
4.1 Introduction
4.2 Automatic change over devices for installations
where the final regulator supplies a pressure
specified in EN 437
4.3 Other automatic change over devices installation
5 Constructional characteristics
5.1 General
5.2 Materials
5.3 Special requirements
5.4 Mechanical strength
5.5 Soundness
5.6 Mechanical endurance
5.7 Resistance to humidity changes
5.8 Resistance to corrosion
6 Performance characteristics
6.1 General
6.2 Operational limit characteristics (regulation function)
6.3 Operational limit characteristics (Change over function)
7 Test methods
7.1 General conditions
7.2 Verification of constructional characteristics
7.3 Verification of performance characteristics
8 Marking, packaging, instructions
8.1 General
8.2 Marking of the device
8.3 Packaging
8.4 Instructions for use and maintenance
Annex A (normative) - Special requirements for automatic
change over devices fitted with pressure or rate
operated safety valves
A.1 Change over devices fitted with an over-pressure
relief
A.2 Automatic change over device fitted with an
over-pressure shut off safety valve
A.3 Automatic change over device fitted with an
under-pressure shut off safety device
A.4 Automatic change over devices fitted with an
excess flow valve
A.5 Automatic change over devices fitted with a
regulated pressure limiter
Annex B (normative) - Special requirements for automatic
change over devices and automatic change over
device systems for caravans, motor caravans or
fresh water boats
Annex C (normative) - Special requirements for low pressure
automatic change over devices 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
D.3 Coefficient K
D.4 Measurement of the leak
D.5 Checks
Annex E (normative) - Complementary test requirements
for non metallic thermoplastic or thermal setting
materials used in the construction of automatic
change over devices
E.1 Scope
E.2 Materials
E.3 Special conditions for carrying out the test
mentioned in the body of the standard
E.4 Special requirements
E.5 Sampling and order of tests
Annex F (normative) - Requirements for elastomeric
reinforced diaphgrams
Annex G (normative) - Inlet connections
Annex H (normative) - Outlet connections
Annex I (normative) - Test method for resistance to
corrosion
I.1 Principle
I.2 Reagents
I.3 Apparatus
I.4 Test method
I.5 Results
Annex J (normative) - Automatic change over device
and change over device systems for LPG
cylinders to supply appliances installed in
seawater boats
J.1 Scope
J.2 General
J.3 Maximum guaranteed rate
J.4 Change over device and change over device
systems fitted with a pressure relief valve
J.5 Vent
J.6 Connections
J.7 Material
J.8 Resistance to corrosion
J.9 Marking
J.10 Instructions for use and maintenance
Annex ZA (informative) - Clauses of this European
Standard addressing essential requirements
or other provisions of EU Directives
Bibliography
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.