Page 58 - Industrial Plant 2015

11/62 plan system and an API 614 lubrication system be performed at the supplier’s facilities, i.e. in
and will be driven by a 3050 kW motor. An API 671
coupling will be fitted onto the skid, which will be
installed on a 3-point base plate with gimbal-type ball
joints. An API 661 air-oil heat exchanger will also be
installed outside the skid.
One of the main features of these pumps, however, is
the back-to-back impellers solution. This configuration
TMP carried out combines the advantage of the
relevant team work balanced hydraulic thrusts derived
involving not only from the back-to-back impellers with
the foundry and the the positively reduced thicknesses of kW.
pattern maker but also the castings of the BB5 barrel
Technip’s material solution in comparison to the “split
engineering experts in case” solution. The aspect related to seals with API 682 13/62 system plan and API 671
order to optimize the the reduced thicknesses of the
design of the barrel castings was particularly critical
and its melting process given that the type of pumped water
and reduce material and its pressure required the use of
super duplex stainless steel for the
thickness to the pressure components. In fact,
minimum Termomeccanica had to reconcile
the mechanical features of the
pressure components, that pushed towards increasing
thicknesses, with the metallurgic difficulties of super
duplex production that grow in parallel to the increase
of the material thicknesses.
In this context, TMP carried out relevant team work
involving not only the foundry and the pattern maker but
also Technip’s material engineering experts in order to
optimize the design of the barrel and its melting process
and reduce material thickness to the minimum.
Fig. 2 - Umm Shaif As it is usual for such complex projects, the supply
site includes a complete string test for each pump, test to
Industrial Plants - May 2015
56
Termomeccanica Pompe’s case, at its La Spezia
headquarters test center. The delivery of the four
pumps is planned for July 2015.
Sea water lift pumps
The second order is for the supply of four API 610 VS1-
type vertical sea water lift pumps for the Umm Shaif
super-complex (figure 2). This order is actually part of
the AGFA project (Additional Gas Supply & Flexibility
Assurance) wanted by the Abu Dhabi Government to
meet Adnoc’s (Abu Dhabi National Oil Company)
gas need seasonal peaks, optimizing the production of
the Umm Shaif complex. In this case too, the order was
awarded to TMP by NTC.
The supply consists of two vertical pumps, with 3250
m3/h flow rate, 94 m head and 1160 kW and two
pumps with 1320 m3/h flow rate, 68 m head and 350
The material used for the 4 pumps is super duplex
A890 gr.5A and all pumps shall be fitted with mechanical
flexible coupling.
The main feature of these pumps is their size: 2 pumps
will be over 28 m long, motor included, while the other
2 will be 24 m long. The pumps will weigh 36,000 and
19,000 kg respectively.
The development of the project has been characterized
by the unusual length of the pumps, which has required
a specific involvement of TMP’s R&D team in the design
the pump. In fact, particular attention has been given to
the accuracy of the modal analysis (so as to guarantee
the absence of any vibration) and, consequently, to the
modelling of both the pump and the interface between
the pumps and the installation deck.
After a first complete assembly, the pumps will be
tested in TMP’s La Spezia test center at reduced
length; they will then be completely re-assembled to
finish the various final adjustments before being
dismantled and divided into vertical modules for
shipment.
Assembly on the platform will take place by inserting
the various modules between the decks and by
lowering them one at a time into the caisson. The
delivery of the four pumps is planned for June 2015.
Process pumps
A third order concerns forty-eight vertical pumps for the
development program of the Satah Al Razboot site
(figure 3).The order was awarded to TMP by Hyundai
Engineering and Construction (HDEC) that won the
tender for the EPC activities for package 4 of the Satah
Al Razboot Full Field development.
The pumps shall be installed as part of a series of