Adopts ISO 21789:2009, which provides the safety requirements for gas turbine applications using liquid or gaseous fuels, and the safety related control and detection systems and essential auxiliaries for all types of open cycles (simple, combined, regenerative, reheat, etc.) used in onshore and offshore applications, including floating production platforms.
Table of contents
Header
About this publication
Preface
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 List of significant hazards
5 Safety requirements
5.1 General
5.2 Risk assessment
5.3 Modifications and replacement parts
5.4 Foreseeable misuse
5.5 Lifetime
5.6 Hazard combinations
5.7 Noise
5.8 Mechanical
5.8.1 Guarding
5.8.1.1 General
5.8.1.2 Hot and cold surfaces
5.8.2 Accessibility for maintenance
5.8.3 Casing design
5.8.4 Gas turbine compressor surge
5.8.5 Stability and handling
5.8.6 Overload of rotating shafts due to torque
5.8.7 Vibration
5.8.8 Mechanical failure caused by corrosion
5.8.9 Design methods and materials
5.8.10 Gas turbine temperatures
5.8.11 Environmental loads
5.8.12 Assembly features
5.8.13 Couplings
5.8.14 Rotor bearings
5.8.15 Rotating part failure
5.8.15.1 General
5.8.15.2 Rotor and disc failure
5.8.15.3 Overhanging rotor parts
5.8.16 Foreign object damage (FOD) screen
5.8.17 Gearbox
5.8.18 Starting systems
5.8.19 Low ambient temperature conditions
5.9 Gas turbine compressor air inlet system
5.9.1 General
5.9.2 Inlet air contamination
5.9.3 Icing monitoring and prevention
5.9.4 Implosion protection
5.9.5 Inlet explosion protection
5.9.6 Waste disposal through combustion
5.9.7 Recirculation
5.9.8 Gas turbine compressor air inlet ducting
5.10 Fuel systems
5.10.1 General
5.10.2 Fuel supply quality and supply conditions
5.10.3 Pressure testing
5.10.4 Fuel supply heating
5.10.5 Gas fuel systems
5.10.5.1 General
5.10.5.2 Isolation
5.10.5.3 Flow control valve
5.10.5.4 Shut-off valves and associated vent valve
5.10.5.5 Shut-off valve – Outside the gas turbine package
5.10.5.6 Strainer
5.10.5.7 Valve proving and position monitoring
5.10.5.8 Venting — Not to atmosphere
5.10.6 Liquid fuel systems
5.10.6.1 Fuel control
5.10.6.2 Isolation
5.10.6.3 Flow control device
5.10.6.4 Automatic fast acting shut-off valve and spill valve
5.10.6.5 Leak tight shut-off valve — Outside the gas turbine package
5.10.6.6 Drain valve
5.10.6.7 Filter/Strainer
5.10.6.8 Valve proving and position monitoring
5.10.6.9 Thermal relief
5.10.7 Multi-fuel systems
5.10.8 Fuel purging
5.10.9 Fuel drainage
5.11 Combustion supervision
5.11.1 General
5.11.2 Requirements for ignition
5.11.3 Extinction safety time
5.12 Exhaust system
5.12.1 Damper controls
5.12.2 Flexible joint location
5.12.3 Exhaust stack
5.12.4 Explosion protection
5.13 Enclosures
5.13.1 General
5.13.2 Enclosure structure
5.13.3 Enclosure fire precautions
5.13.3.1 General
5.13.3.2 Gas turbine enclosure
5.13.4 Explosion prevention and protection — Area classification — Ventilation
5.13.5 Gas detection
5.13.6 Enclosure purging
5.13.7 Mist detection
5.13.8 Access and doors
5.13.9 Entrapment
5.14 Lighting
5.15 Fire precautions
5.15.1 General
5.15.2 Structural fire risk reduction
5.15.3 Hydrocarbon fire risk reduction
5.15.3.1 General
5.15.3.2 Lubrication and hydraulic systems
5.15.3.3 Post-shut-down lubrication
5.15.4 Fire protection
5.15.5 Fire detection
5.15.6 Fire extinguishing systems
5.15.7 Water mist extinguishant
5.15.8 Extinguishing system controls
5.15.9 Escape
5.15.10 Uncontrolled release of media and loss of propellant pressure
5.15.11 Vessel thermal relief (burst disc)
5.15.12 Vessel and/or pipe failure
5.15.13 Release of extinguishant into gas turbine halls, control rooms, etc.
5.16 Hazardous area classification and explosion prevention and protection
5.16.1 General
5.16.2 Area classification
5.16.3 Explosion prevention
5.16.4 Ignition source control
5.16.4.1 General
5.16.4.2 Electrical ignition sources
5.16.4.3 Non-electrical ignition sources
5.16.4.3.1 General
5.16.4.3.2 Hot surface temperatures
5.16.4.4 Auto-ignition temperature data
5.16.5 Reduction of explosion effects in an enclosed space
5.16.5.1 General
5.16.5.2 Explosion relief
5.16.5.3 Explosion pressure resistant design
5.16.5.3.1 General
5.16.5.3.2 Dilution ventilation
5.16.5.3.3 Ventilation validation
5.16.5.4 Explosion suppression
5.17 Ventilation
5.17.1 General
5.17.2 Cooling
5.17.3 Heating
5.17.4 Hazardous area control
5.17.5 Hot surfaces
5.17.6 Ventilation inlet location
5.17.7 Ventilation inlet filtration
5.17.8 Ventilation inlet ducting
5.17.9 Ventilation outlet location
5.17.10 Flow monitoring — Artificial ventilation
5.18 Fans
5.18.1 Fan guards and structural failure
5.18.2 Air blast oil coolers
5.19 Flammable gas detection
5.19.1 General
5.19.2 Type/selection principles
5.19.3 Location principles
5.19.4 Settings
5.19.5 Enclosures containing hot surfaces — Screening tool
5.19.6 Maintenance and calibration
5.20 Control and automatic protection systems
5.20.1 General
5.20.2 Environmental suitability
5.20.3 Ergonomics
5.20.4 Failure
5.20.5 Calibration
5.20.6 Testing
5.20.7 Speed control
5.20.8 Gas turbine emergency shut-down system
5.20.9 Interlocks
5.21 Electrical
5.21.1 Design/Installation
5.21.2 Isolation and stored energy
5.21.2.1 General
5.21.2.2 Isolation of electrical equipment in potentially hazardous areas
5.21.2.3 Stored energy
5.21.3 Electrostatic energy and bonding
5.21.3.1 Non-conducting parts
5.21.3.2 Conducting parts
5.21.3.3 Stray electric currents
5.21.4 Water ingress
5.21.5 Lightning
5.21.6 Electromagnetic compatibility (EMC)
5.21.7 Battery installations
5.21.8 Electrical overload
5.21.9 Electrical power failure
5.21.9.1 System failures
5.21.9.2 Electrical power restoration
5.22 Drains, vents and bleeds
5.22.1 General
5.22.2 Vents for flammable gases
5.22.3 Toxic and hazardous emissions
5.22.4 Gas turbine compressor bleeds
5.23 Pressure equipment
5.23.1 General
5.23.2 Design
5.23.3 Hazards
5.23.4 Misuse
5.23.5 Safe handling and operation
5.23.6 Isolation, draining and venting
5.23.7 Fluid injection
5.23.8 Assemblies
5.23.8.1 General
5.23.8.2 Pressure control and overpressure protection
5.23.8.3 Particulate contamination
5.23.8.4 Filling and drainage
5.23.8.5 Accumulators
5.23.8.6 Quick release connections
5.23.8.7 Pumps
5.23.9 Safety accessories
5.23.9.1 General
5.23.9.2 Pressure limiting devices
5.23.9.3 Thermal safety
5.23.10 Flexible piping (and metal hoses)
5.23.11 External fire
5.23.12 Material embrittlement and corrosion
5.23.13 Ultra-violet (UV) resistant pipework
5.24 Auxiliary systems
5.24.1 Lubrication systems
5.24.2 Water systems
5.24.3 Hydraulic and pneumatic systems
5.24.4 Utility supplies
5.25 Installation in a hazardous area
5.26 Unenclosed gas turbines in a hall
5.27 Decommissioning and disposal
6 Compliance verification
6.1 Quality assurance
6.2 Verification of safety requirements
7 Information for use
7.1 General
7.2 Language
7.3 Packaging
7.4 Commissioning
7.5 Operation
7.5.1 General
7.5.2 Safety instructions and emergency procedures
7.6 Enclosure access
7.6.1 General
7.6.2 Risk assessment for accessing enclosures
7.6.3 Limitations under operational conditions
7.6.4 Limitations under non-operational conditions
7.6.5 Access during commissioning and re-commissioning
7.6.6 Installations in a hazardous area
7.7 Maintenance
7.7.1 General
7.7.2 General maintenance hazards
7.7.3 Accessibility, isolation and energy dissipation
7.7.4 Pressure equipment
7.7.5 Fire protection systems
7.7.6 Gas detectors
7.7.7 Control systems: maintenance, calibration and testing
