5.7.2 Flushing
More detailed recommendations on flushing procedures are when necessary described under
the relevant chapters concerning the fuel oil system and the lubricating oil system. Provisions
are to be made to ensure that necessary temporary bypasses can be arranged and that flushing
hoses, filters and pumps will be available when required.
5.8 Flexible pipe connections
Pressurized flexible connections carrying flammable fluids or compressed air have to be type
approved.
Great care must be taken to ensure proper installation of flexible pipe connections between
resiliently mounted engines and ship’s piping.
● Flexible pipe connections must not be twisted
● Installation length of flexible pipe connections must be correct
● Minimum bending radius must respected
● Piping must be concentrically aligned
● When specified the flow direction must be observed
● Mating flanges shall be clean from rust, burrs and anticorrosion coatings
● Bolts are to be tightened crosswise in several stages
● Flexible elements must not be painted
● Rubber bellows must be kept clean from oil and fuel
● The piping must be rigidly supported close to the flexible piping connections.
Wärtsilä 46F Product Guide - a19 - 1 December 2017 5-5
5. Piping Design, Treatment and InstallationWärtsilä 46F Product Guide
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