D
eveloped by PT Kepland Investama
(a subsidiary of Keppel Land), the
building is the first in Indonesia
to receive the internationally recognised
Green Mark Platinum Award from the
Building and Construction Authority (BCA)
of Singapore.
Eco-friendly innovations in the
building include a highly efficient chiller
plant system. In a city that averages
temperatures of 30°C, an efficient air-
conditioning system is critical. The
footprint of the air-conditioning system
was also a concern in order to maximise
liveable space in the building.
Movement in risers
Supplying air-conditioning from a central
plant room to all areas of a building this
size requires the use of vertical risers –
pipes that move cooling and condenser
water vertically in hidden shafts within
the building. However several key design
considerations must be addressed,
including movement within the piping
system.
Movement in piping systems is a
normal occurrence and can be caused
by any number of phenomena including
building settlement (from ground
compression), sway (from wind), and
thermal movement (from changes in
temperature). Air-conditioning systems
commonly see movement in the form of
temperature change. Heat causes pipes to
expand while cold causes them to shrink.
So how did the contractor, Jaya Teknik, and
Engineers Ciriajasa and Asdi Swasatya
accommodate for this movement and
provide a safe, efficient air-conditioning
system in the International Financial
Centre Jakarta?
Simple calculations that take into
account the height of the riser and the
temperature fluctuations within the pipe
provided the team with the required
range of movement within the piping
system. Once the range of movement
was confirmed, they considered their
options – do they utilise a traditional
flanged expansion unit or something more
compact?Traditional flanged expansion units
can have a very large footprint, and usually
need to be replaced every five years due
to standard wear and tear. Considering
the large diameter of the piping systems
(up to 500mm OD), a traditional flanged
expansion unit would be prohibitively
heavy and require additional engineering
for a safe and resilient installation. Jaya
Teknik, Ciriajasa and Asdi Swasatyafound a unique solution to overcome the
challenges of the project – an in-line
expansion joint utilising flexible grooved
couplings.
Unlike specialty flanged expansion
units designed to only provide movement
in the system, expansion joints utilising
grooved couplings are inherently designed
to provide movement while also acting
as a robust, restrained pipe joint. Used
independently, flexible couplings provide
joints that last the life of the system. When
installed in a series of flexible couplings,
like the Victaulic Style 155 Expansion Joint,
the trusted joint also acts as a specialty unit
that allows for the required movement of
the system. Available in sizes up to 600mm,
Jaya Teknik was able to utilise sixteen (16)
Style 155 Expansion Joints on all chilled
and condenser water risers ranging from
150 – 500mm.
“Style 155 Expansion Joints were a
critical component in minimising system
footprint,” said Henry Sasongko, Project
Director from Jaya Teknik Indonesia. “We
were able to maximise the small space
in the shafts, and had plenty of room toCalculating Thermal Movement in Pipe:
ΔL = L x a x ΔT
Where:- ΔL = total change in the length of
the pipe [mm] - L = original pipe length [m]
- a = linear expansion coefficient
- ΔT = difference in temperature [°C]
When compared side by side, there’s no question as to which expansion joint provides a smaller
footprint. The Victaulic Style 155 Expansion Joint is an in-line unit that allows for movement of
the system. Photos by VictaulicThe International Financial Centre (IFC) Jakarta Tower 2 is amongst the tallest
buildings in Indonesia. Standing at 215 metres high, the complex offers 48 storeys of
modern office space. Victaulic was proud to be involved in this prestigious project.
Text by Victaulic
46 SEAB MAY-JUNE 2018
ARCHITECTURE + INTERIOR