ISO 3977-3:2004

Overview

ISO 3977-3:2004 - Gas turbines - Procurement - Part 3: Design requirements defines the technical design guidance used when a purchaser acquires gas turbines and gas-turbine systems from a packager. It covers design expectations for simple-cycle, combined-cycle and regenerative-cycle gas turbines operating in open systems, and provides assistance and technical information to support procurement. The standard is not intended to replace local or national legislation and specifically excludes gas turbines used for aircraft propulsion and most mobile machinery.

Key topics and requirements

ISO 3977-3:2004 sets out design-related considerations that purchasers and packagers should address during procurement. Major technical topics include:

• Basic and site-specific requirements - design adaptation for ambient conditions, altitude, and installation environment.
• Operational and service requirements - expected duty cycles, start/stop regimes, maintenance access and service intervals.
• Rotating equipment - design expectations for rotors, bearings, couplings and vibration management (critical speeds, balance and runout).
• Packaging and auxiliaries - enclosure, cooling, lube oil systems, fuel systems, filtration and anti-icing provisions.
• Control and instrumentation - control system architecture, start/stop sequences, loading/unloading, fuel control, governing, limiting and diagnostics.
• Safety and protection - overspeed protection, emergency shutdown, protection systems and operability features.
• Vibration and dynamics - measurement, evaluation criteria and susceptibility considerations.
• Emissions and monitoring - requirements for emission control and automated emission monitoring where applicable.
• Documentation and data sheets - recommended technical data sheets and annex guidance to support procurement.

The standard references related ISO and IEC documents for vibration, emissions, piping, electrical machinery and materials, ensuring interoperability of requirements.

Applications and who uses it

ISO 3977-3:2004 is used by:

• Purchasers and project owners specifying design requirements in procurement contracts.
• Packagers and OEMs preparing proposals and packaged gas turbine systems to meet purchaser requirements.
• Design and commissioning engineers ensuring system design aligns with procurement expectations.
• Consultants and procurement specialists drafting technical specifications and bid evaluations.

Common applications include power generation plants (simple-cycle and combined-cycle), industrial drive applications and packaged turbine-generator sets.

Related standards

Relevant family and cross-reference standards:

• ISO 3977 series (Parts 1, 2, 4, 5, 7, 8, 9)
• ISO 11086 (gas-turbine vocabulary)
• ISO/IEC and IEC standards for vibration, emissions and electrical machines (e.g., ISO 7919, IEC 60034)

Using ISO 3977-3:2004 helps create clear, consistent procurement specifications for gas turbine design, reducing technical risk and improving supplier alignment.