External Exhaust Gas System; Piping - WÄRTSILÄ 32 Product Manual

Wärtsilä 32 Product Guide
Engine
W 12V32
W 16V32
W 18V32
11.3

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 11-8
11.3.1

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
directly after the bellows on the turbocharger. Pipe bends should be made with the largest
possible bending radius; the bending radius should not be smaller than 1.5 x D.
Wärtsilä 32 Product Guide - a21 - 7 September 2016
TC type ØA [mm]
NA 297/307 DN400
TPS61 DN600
NA298 DN400
NA358 DN400
NT1-10A DN500
NA 297/307 DN400
TPL67 DN500
NA358 DN500
NT1-12A DN600
TPL67 DN500
External exhaust gas
system
11. Exhaust Gas System
ØB [mm]
900
900
900
900
600
1000
1000
1000
1000
1000
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
11-7