PREN 13638 : DRAFT 1999

FOREWORD
INTRODUCTION
1 SCOPE
2 NORMATIVE REFERENCES
3 DEFINITIONS
4 SYMBOLS AND ABBREVIATIONS
5 GENERAL
   5.1 GAS COMPRESSOR
   5.2 GAS STORAGE
   5.3 MOTHER DAUGHTER STATION
   5.4 DISPENSER
   5.5 CONTROL SYSTEMS
   5.6 DRYER
   5.7 GAS COOLING SYSTEM
6 GENERAL PRINCIPLES OF DESIGN AND INSTALLATION
   6.1 GENERAL CONSTRUCTION
   6.2 GAS COMPOSITION
   6.3 SAFETY DEVICES
   6.4 FILLING PRESSURE TO THE VEHICLES
   6.5 VENTING
7 LOCATION AND LAYOUT OF EQUIPMENT
   7.1 GENERAL CARS
   7.2 HAZARDOUS AREAS
   7.3 RESTRICTIONS AND SAFETY DISTANCES
   7.4 ENCLOSURES
   7.5 CANOPIES
8 GAS SUPPLY, METERING AND COMPOSITION
   8.1 GENERAL
9 GAS COMPRESSOR (INCLUDING ANCILLARIES)
   9.1 GENERAL
   9.2 GAS RECOVERY
   9.3 CONDENSATE DRAINAGE AND DISPOSAL
   9.4 STAGE RELIEF
   9.5 DELIVERY LINE NON-RETURN VALVE
   9.6 SUCTION LINE COMPONENTS
   9.7 INSTRUMENTATION
   9.8 MARKINGS
   9.9 INSTRUCTIONS
10 STORAGE FACILITY (INCLUDING ANCILLARIES)
   10.1 STORAGE VESSELS
   10.2 PRESSURE RELIEF DEVICES
   10.3 EMERGENCY ISOLATION VALVE
   10.4 PRESSURE GAUGE
11 STATION PIPEWORK AND ANCILLARY DEVICES
   11.1 STATION PIPEWORK
   11.2 SUPPLY PIPEWORK
   11.3 DISTRIBUTION PIPEWORK
   11.4 PRESSURE GAUGES
   11.5 PRESSURE TESTING
   11.6 GAS DETECTION SYSTEM
12 EMERGENCY SHUT DOWN PROCEDURES
13 DISPENSER
   13.1 DISPENSING UNIT
   13.2 FILLING HOSE
   13.3 FILLING NOZZLE
   13.4 CAPTIVE VENT SYSTEMS
14 ELECTRICAL EQUIPMENT AND WIRING
   14.1 GENERAL
   14.2 EARTHING PROTECTION
   14.3 LIGHTNING PROTECTION
15 TESTING, PURGING AND COMMISSIONING
16 OPERATING NOTICES AND INSTRUCTIONS
   16.1 SIGNS
   16.2 INSTRUCTION SIGNS
   16.3 INSTRUCTIONS
ANNEX A (NORMATIVE) HAZARDOUS AREAS
ANNEX B (NORMATIVE) SAFETY DISTANCES
ANNEX C (INFORMATIVE) INSTRUCTIONS
   C1 INSTRUCTIONS FOR FILLING
ANNEX D (INFORMATIVE)
   D1 HYDROSTATIC AND PNEUMATIC TESTING
   D2 SAFETY PRECAUTIONS
   D3 HYDROSTATIC STRENGTH/PRESSURE TEST OF SYSTEM
      COMPONENTS
   D4 PNEUMATIC LEAK TEST OF THE COMPLETE SYSTEM
   D5 SPECIAL DRYING
ANNEX E (INFORMATIVE) PURGING
   E1 PURGING
ANNEX F (INFORMATIVE) EXAMPLE OF FILLING PLAN WITH THREE
        SUPPLY LINES TO DISPENSER
ANNEX G (INFORMATIVE) BIBLIOGRAPHY
ANNEX H (INFORMATIVE) HAZARDOUS AREA CLASSIFICATION FOR
        CONFINED SPACES

Covers the design manufacturing, assembling, installation and testing of compressed Natural Gas (CNG) vehicle filling stations filling up to the temperature compensated equivalent of 20 MPa at 15 degrees C. Applicable for higher operating pressures, having due regard to the safety of