TPi April 2008

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April 2008 Tube Products International 43
OCTGwater, gas &
Fabricated pipe work
assembly supplier expands
into water filtration
PTF Engineering, part of the Rolwey Group, is a supplier of
fabricated pipe work assemblies for refineries, where it also
has engineers on-site for installation and maintenance.
The company has acquired Stella-Meta, UK, a specialist
manufacturer of water purification units for military use. The
acquisition expands the range of services the company can
offer to include supply/maintenance of water purification
units, training and logistical support, including mechanical
maintenance services to the UK Ministry of Defence.
Stella-Meta manufactures a range of mobile water puri-
fication units, flexible water storage tanks and distribution
accessories to provide safe drinking water from any source.
A comprehensive range of systems includes small portable
units capable of 5,000 litres/day, up to larger mobile plants
capable of up to 70,000 litres/day. The units are designed
to remove contaminants, including nuclear, biological and
chemical, from fresh or sea water sources. The company
also has a contract with the Ministry of Defence for
the repair, maintenance and supply of spares, including
engineering and development support.
Rolwey Group Ltd – UK
•
For the government project of laying a
water pipeline through the Bosporus,
Firat Plastik Kaucuk Sanayi ve Ticaret
AS, Turkey, recently produced 4,000m
of large-diameter pipe within record
time.
300,000 cubic metres of drinking water
are to be transported daily from the
Ömerli reservoir on the Asian side of
Istanbul to the European part of the city.
The pipes have 109.1mm thick walls
– the highest wall thickness so far
produced – to enable them to withstand
the high pressures of the water flowing
through and the surrounding water.
For the production of large-diameter
pipes, each 13m long and weighing
5 tons, the Turkish pipe manufacturer
relied on its long-term supplier,
Cincinnati Extrusion GmbH, Austria,
who simultaneously remodelled two
extrusion lines on-site.
The extrusion dies as well as the
downstream aggregates were adapted
to handle the special dimensions.
The PHPO 100 and PHPO 63 pipe
extrusion dies equipped with spiral
mandrel distributors anddie-face cooling
ensure optimal melt temperatures and
an excellent melt distribution, even with
the high viscosity of PE 100.
Thanks to a modification using special
die and mandrel components, the wall
thickness of 109.1mm in the 1,200mm
pipes could be produced without any
problems.
Both lines, with an output of 1,000kg/h
each, operated round the clock for a
whole month to have the 4,000m of
large-diameter pipe delivered on time.
One line is equipped with a Proton
150-30 G single-screw extruder, and the
second line features a Monos 120-37 G
high-speed extruder. With a processing
unit that has been extended to 37 D,
Monos extruders reach a 30% higher
output than their predecessor models
from the Proton series, so that the
extruder model can be scaled down by
one size to produce the same output, as
in this case.
Firat was reportedly pleased with both
the high productivity of the two extrusion
lines and the quality of the pipes, which
show narrow thickness tolerances and
fully comply with all specifications.
Cincinnati Extrusion GmbH – Austria
Firat Plastik Kaucuk Sanayi ve
Ticaret AS – Turkey
Extra-thick large-diameter pipes
connecting Europe with Asia
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