Great cleanliness shall be approved in all work phases after completed pickling.
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.
Figure 5.1
Flexible hoses
Product Guide Wärtsilä 34DF - 3/2012
33
Product Guide
5. Piping Design, Treatment and Installation