Taking Out Of Operation For A Long Period; General; Lubricating Oil; Process For Taking Out Of Operation - ABB Turbo Systems Switzerland Power2 550-M44 Operation Manual

Operation Manual / Power2 550-M / High-pressure stage
11 Taking out of operation for a long period / 11.1 General
11 Taking out of operation for a long
period
11.1

General

When taking the low-pressure and high-pressure stage out of operation, mothballing meas-
ures must be taken in order to minimise the risk of corrosion on components. The necessary
measures depend on the condition of the lubricating oil and the process used to take the
low-pressure and high-pressure stage out of operation.
11.2

Lubricating oil

No measures must be taken with regard to the lubricating oil if:
¡
The directives of the enginebuilder on lubricating oil selection and on the oil change in-
tervals are followed.
Or:
¡
The engine lubricating oil is replaced by a preservative oil and circulated with the pre-lub-
rication pump before the engine is taken out of operation.
If neither of the criteria above are met, mothballing by a service station is necessary. This in-
cludes cleaning and applying preservative oil to the relevant components.
11.3

Process for taking out of operation

Different measures are required depending on the process used to take the low-pressure
and high-pressure stage out of operation.
¡ The low-pressure and high-pressure stage remains on the engine
– Take countermeasures if there is a risk that the rotor will turn due to the stack
draught. One option is to install a blind flange on the outlet flange of the gas outlet
casing or the compressor casing.
– If the engine is being taken out of operation for a long period in a corrosive environ-
ment, all components through which air flows must be provided with corrosion pro-
tection. Contact a service station for this purpose.
¡
Disassembly of the low-pressure and high-pressure stage as a whole unit or in individual
parts
– Seal all openings of the low-pressure and high-pressure stage with paraffin paper and
wooden lids.
– Store the disassembled parts in a dry room with 40-70% atmospheric humidity in
which no condensation can form.
– Check all low-pressure and high-pressure stage parts for corrosion annually.
– If there are signs of rust, thoroughly clean the parts and renew the corrosion protec-
tion.
© Copyright 2022 ABB. All rights reserved. HZTL4058_EN Rev.F March 2022