Wartsila ?31DF Series, Product Manual, Page: 82 / 216

Fig 5-2 Flexible pipe connections (V60L0796)
NOTE
Pressurized flexible connections carrying flammable fluids or compressed air have
to be type approved.
5.9 Clamping of pipes
It is very important to fix the pipes to rigid structures next to flexible pipe connections in order
to prevent damage caused by vibration. The following guidelines should be applied:
●
Pipe clamps and supports next to the engine must be very rigid and welded to the steel
structure of the foundation.
●
The first support should be located as close as possible to the flexible connection. Next
support should be 0.3-0.5 m from the first support.
●
First three supports closest to the engine or generating set should be fixed supports. Where
necessary, sliding supports can be used after these three fixed supports to allow thermal
expansion of the pipe.
● Supports should never be welded directly to the pipe. Either pipe clamps or flange supports
should be used for flexible connection.
Examples of flange support structures are shown in Figure 5-3 . A typical pipe clamp for a
fixed support is shown in Figure 5-4 . Pipe clamps must be made of steel; plastic clamps or
similar may not be used.
5-8 DBAE248994
Wärtsilä 31DF Product Guide 5. Piping Design, Treatment and Installation