NEN EN ISO 2503 : 2009 AMD 1 2015
Current
The latest, up-to-date edition.
12-01-2013
Foreword
1 Scope
2 Normative references
3 Definition
4 Terminology
5 Units
5.1 Pressure
5.2 Flow
5.3 Temperature
6 Manufacturing requirements
6.1 Materials
6.2 Design, machining and assembly
7 Types of connections
7.1 Inlet connections
7.2 Outlet connections
8 Physical characteristics
8.1 Pressures
8.2 Flow rates
8.3 Equipment classes
8.4 Operating characteristics
9 Marking
10 Instructions for use
11 Type test procedure
11.1 General
11.2 Test samples and necessary documents
11.3 Test conditions
11.4 Functional tests
11.5 Mechanical tests
11.6 Test for durability of markings
Annex ZA (normative) Normative references to
International publications with their
relevant European publications
Figures
1 - Diagram of a pressure regulator and
designation of its components
2 - Typical dynamic expansion curves
3 - Example for the measurement of the maximum
discharge, Qmax
4 - Example for the measurement of the dynamic
expansion curves
5 - Test bench for ignition test
6 - Test interval
Tables
1 - List of terms
2 - Conversion, coefficient, U
3 - Symbols used
4 - Equipment classes
5 - Code letters for gases to be used for marking
of pressure regulators
6 - Test pressures
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