External Exhaust Gas System - Wartsila 31 Product Manual

10. Exhaust Gas System
Fig 10-6 Exhaust pipe, diameters and support
(DAAF351275, DAAF351507)
10.3

External exhaust gas system

Each engine should have its own exhaust pipe into open air. Backpressure, thermal expansion
and supporting are some of the decisive design factors.
Flexible bellows must be installed directly on the turbocharger outlet, to compensate for
thermal expansion and prevent damages to the turbocharger due to vibrations.
Fig 10-7
10.3.1 Piping
The piping should be as short and straight as possible. Pipe bends and expansions should
be smooth to minimise the backpressure. The diameter of the exhaust pipe should be increased
10-6
External exhaust gas
system
Wärtsilä 31 Product Guide
Engine TC type ØA [mm]
12V31 D450
ABB POWER2
14V31 D450
845-M
16V31 D450
1 Diesel engine
2 Exhaust gas bellows
3 Connection for measurement of back pressure
4 Transition piece
5 Drain with water trap, continuously open
6 Bilge
7 SCR
8 Urea injection unit (SCR)
9 CSS silencer element
Wärtsilä 31 Product Guide - a1 - 18 October 2016
ØB [mm]
900
900
1000