What is ISO 21905 about?
ISO 21905 discusses gas turbine exhaust systems with or without heat recovery. ISO 21905 specifies requirements and gives recommendations for the design, materials of construction, modelling, controlling, fabrication, inspection, testing, installation, start-up and operation of industrial gas turbine (GT) exhaust systems with or without waste heat recovery unit (WHRU). Gas turbines can be on-shore or off-shore for such sectors as oil and gas, chemical and process industries, utilities, or other intensive energy users.
For ISO 21905, the exhaust system means all items in the turbine exhaust gas stream between the GT exhaust gas collector outlet flange and the termination/s to the atmosphere.
The following items are not covered by ISO 21905:
- heat recovery steam generator equipment (HRSG)
- supplementary fired systems
- auxiliary fired systems
- exhaust gas collector (also known as exhaust plenum)
- fire detection and extinguishing systems
- emissions controls equipment intended to modify the gaseous composition of the exhaust gas
- WHRUs that are of the firetube type, where the turbine exhaust gas (TEG) passes through the tubes
Who is ISO 21905 for?
ISO 21905 on gas turbine exhaust system is relevant to:
- Manufacturers of gas turbines
- Mechanical engineers
- Researchers and innovators
- Service and maintenance professional for Gas turbines
Why should you use ISO 21905?
An exhaust gas turbine drives a turbocharger with power from a piston engine. ISO 21905aims to provide purchasers and suppliers of exhaust duct systems with an overview of the use of CFD assessment in improving exhaust duct design and quality assurance.
ISO 21905 instructs buyers to include datasheets, checklists, and other applicable information in their enquiries.
Suppliers and purchasers will benefit from ISO 21905 to which equipment can be bought, designed, and constructed - especially given the challenging nature of turbulent exhaust gas flow and the associated complexity of the mechanical design.