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Operation Manual / Power2 650-M / 4.2 High-pressure stage
3 Expected replacement intervals /
© Copyright 2019 ABB. All rights reserved.
HZTL4066_EN
Revision A
March 2019
3
Expected replacement intervals
Rotating components
The recommended replacement intervals for compressor and turbine wheels are specified
based on the safety concept for rotating parts (SIKO) and dependant on the operating con-
ditions. These intervals are shown on the rating plate of the low-pressure and high-pressure
stage.
Non-rotating components
Depending on the system-specific operating conditions, a differentiation must be made
between the intervals to be expected for:
¡
replacing the bearing parts and
¡
replacing the non-rotating components exposed to hot gas.
A decisive role is played by various influencing parameters which, in extreme cases, can
drastically reduce the replacement interval of these parts.
During the prescribed periodic service work, the individual parts are examined for wear and
replaced if necessary.
Expected replacement intervals [h]
GAS / MDO
HFO
Turbine casing
25000 … 50000
25000
Nozzle ring
25000 … 50000
25000
Gas outlet flange
25000 … 50000
25000
Heat shield
25000 … 50000
25000
Heat sheet metal
25000 … 50000
25000
Collecting grid in gas outlet casing
20000
20000
Rotor components
See rating plate data
Bearing parts
12000 … 24000
Other casings
50000
50000
Table 5: Expected replacement intervals [h]
GAS
= Gas
MDO
= Marine Diesel Oil
HFO
= Heavy Fuel Oil
The specified values are guideline values and are not guaranteed, see influence parameters.
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