I.S. 821:2006
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
GAS PRESSURE REGULATING STATIONS FOR DISTRIBUTION
Hardcopy , PDF
11-21-2017
English
01-01-2006
DECLARATION
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 I.S. EN 12186
5 Quality system
6 Layout of the gas pressure regulating station
6.1 General
6.2 Proximity requirements
6.3 Layout of the site
6.4 Site security
7 Housings
7.1 General
7.2 Requirements for housings
7.3 Underground stations
7.3.1 General
7.3.2 Stations in a pit
7.3.3 Buried vessel type stations
8 Design of the station
8.1 General
8.2 Gas pre-heating
8.3 Filters, separators, scrubbers
8.4 Noise control
8.4.1 General
8.4.2 Environmental acceptance
8.4.3 Work area noise
8.5 Apertures and vent lines
8.5.1 Apertures
8.5.2 Vent lines
8.6 Electrical installation
8.7 Lightning and earthing
8.8 Cathodic protection and electrical isolation
8.9 Ancillaries
8.10 Pipework
8.11 Welding
8.12 Instrumentation pipework
8.13 Stress analysis
8.13.1 General
8.13.2 Design pressure
8.13.3 Design factor
8.13.4 Supports
8.13.5 Flexibility
8.13.6 Temperature
8.13.7 Gas velocity
8.14 Isolating valves
8.14.1 Supports
8.15 Isolating valves
9 Pressure control
9.1 General
9.2 Pressure regulating system
9.3 Pressure safety system
9.3.1 General
9.3.2 Operating principles of pressure safety
systems
9.3.3 Applications
9.4 Non-venting pressure safety devices
9.4.1 Safety shut-off devices
9.4.2 Monitors
9.5 Venting pressure safety devices
9.5.1 General
9.5.2 Creep relief valve
9.6 Pressure warning system
9.7 Instrumentation
9.8 Bypasses
9.8.1 Temporary bypasses for equalization or
testing
9.8.2 Bypasses of the pressure control and/or
safety system
10 Testing
10.1 General
10.2 Strength test
10.2.1 General
10.2.2 Installations with MOP up to and including
16 bar
10.3 Tightness test
10.4 Reporting
11 Commissioning
12 Operation and maintenance
12.1 General
12.2 Data
12.3 Maintenance
12.4 Training
12.5 Work undertaken
12.6 Firefighting
12.7 Maintenance review
Annex A (normative) Proving tests
A.1 Safety
A.2 General
A.3 Test equipment
A.4 Pneumatic tests
A.5 Hydrostatic tests
A.6 Test certificates and records
Bibliography
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