2.1.1 The
following plans are to be submitted for consideration:
- Casings.
- Combustion chambers, intercoolers and heat exchangers.
- Compressor and gas generator rotating components.
- Control engineering systems, see
Pt 6, Ch 1 Control Engineering Systems.
- Cooling and sealing air arrangements for compressor and gas generator
components: Schematic only.
- Cooling water system: Schematic only, where applicable.
- Fuel systems: Schematic only.
- Gas turbine unit acoustic enclosure, if applicable, including
ventilation and drainage systems: Schematic only.
- Inlet and exhaust ducting arrangement.
- Lubricating oil systems: Schematic only.
- Nozzles, blades and blade attachments.
- Fuel oil systems: Schematic only.
- Power turbine components.
- Rotors, bearings and couplings.
- Sectional assembly.
- Securing arrangement, including details of resilient mounts, where
applicable.
- Starting system: Schematic only.
2.1.2 The
following information and calculations, where applicable, are to be
submitted:
-
Operational requirements:
- Proposed field of application and operational limitations.
- Power/speed operational envelope.
- Calculations and information for short-term high power operation.
- Operation and maintenance manuals including the declared lives
of critical components and overhaul schedules recommended by the manufacturer.
-
Calculations of
the critical speeds of blade and rotor vibration, giving full details
of the basic assumptions, see also
Pt 5, Ch 4, 4.3 Containment 4.3.1.
-
Analysis of the
effect of rotor blade release together with details of operating experience, see also
Pt 5, Ch 4, 4.3 Containment 4.3.2.
-
High temperature
characteristics of the materials, including (at working temperatures)
the associated creep rate and rupture strength for the designed service
life, fatigue strength, corrosion resistance and scaling properties.
-
Material requirements:
- Particulars of heat treatment, including stress relief.
- Material specifications covering the listed components together
with details of any surface treatments, non-destructive testing and
hydraulic tests.
-
The most onerous
pressures and temperatures to which each component may be subjected
are to be indicated on plans or provided as part of the design specification.
-
Calculations of
the steady state stresses, including the effect of stress raisers,
etc. in the compressor and turbine rotors and blading at the maximum
speed and temperature in service. Such calculations are to indicate
the designed service life and be accompanied, where possible, by test
results substantiating the limiting criteria.
-
Details of calculations
and tests to establish the service life of other stressed or safety
critical components, including bearings, seals, couplings and gearing.
Calculations and tests are to take account of all relevant environmental
factors including the particular type of service and fuel intended
to be used.
-
Mounting requirements:
- Securing arrangements, including details of resilient mounts.
- Calculations concerning the amplitude and frequency of vibration
associated with resilient type mountings.
-
A Failure Mode
and Effects Analysis (FMEA).
-
Miscellaneous:
- Design standard of intake filtration for water particulate and
corrosive marine salts.
- Details of compressor washing system.
- Fuel specification.
2.1.3 Components
fabricated by means of welding will be considered for acceptance if
constructed by firms whose works are properly equipped to undertake
welding of the standards appropriate to the components. Details are
to be submitted for consideration.
2.1.4 Before
work is commenced, manufacturers are to submit for consideration details
of proposed welding procedures and their proposals for routine examination
of joints by non-destructive means.
2.1.5 The
manufacturer's proposals for testing the gas turbine are to be submitted
for consideration and are to include rotor balancing techniques, methods
of determining the soundness of pressure casings and heat exchanger
tests, see
Pt 5, Ch 4, 1 General requirements.