PipeLine

Compendium 2011

E Engineering GmbHAll rights reserved.

Responsible for content: Alexandra Dobnigg, Sabine Friesser, Sabrina SereinigLayout: Sabrina Sereinig | Publication: 04/2012

All rights reserved. No part of this document may be reproduced or utilized in any form or by any means without our prior written per- mission. All information in the document is correct at the time of going to press. However, we reserve the right to make changes withoutnotice, in particular to technical data. The data given is not binding and must therefore be checked in each individual case and revised asappropriate.

E Engineering GmbH | Pischeldorfer Str. 128 | 9020 Klagenfurt | Austria

T +43.463.48 24 24 | F +43.463.48 21 21 | info@hobas.com | www.hobas.com

January 2011

PipeLineContent

1 I Rome Makes Assurance Triple Sure!, IT

3 | Pragues Underground, CZ

Rome Makes Assurance Triple Sure!h CC-GRP Double Pipes for the City of Sports in Rome, IT

Major works are under way in the district Tor Vergata where Romes so called Second University is based. With the establishment of the City of Sport (Citt dello Sport) a substantial aim of

the project is to improve the area - not least with an impressive design by the architect Santiago Calatrava.

Inspired by the ancient Roman Circus Maximus, the plans of the famous Spanish architect include a long avenue with two rows of cypresses on

either side. The City of Sports lying on one and the University Rector-ate on the opposite end of the road, that is in fact twice as long as its

ancient paradigm, shall characterize the new sports facilities.

With an investment of approximately 600 million Euros the City of Sports consists of two identical shells made of concrete, steel and other metals. They accommodate the Palasport for e.g. ball games such as basket and volley ball for up to 15,000 spectators as well as the Palanuoto with swim-ming pools and an area for 4,000 people.1

Since the exterior beauty of these facilities would be worthless without a sane interior such as functioning piping systems, a lot of thought was also given to this issue. Stormwater from the sports facilities is collected in a water main DN 2700 that has been installed by microtunneling. This pipeline, however, serves as host pipe for other service lines as well. It for instance holds a sewer pipe that runs on steel saddles which are fixed to traverses perpendicularly mounted to the tunnel every 3 m. A steel grid as walkway for easy inspection and maintenance of the tunnel is placed above these traverses.

Regarding the sewer pipes reliability, the awarding authority, the Municipality of Rome, decided to make as-

surance double sure and opted for HOBAS GRP instead of the initially proposed pipe material. Although HOBAS Pipes

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h PipeLine | January 2011 | Page 02

have a service life up to 100 years and provide independently testified leak-tightness, the Municipality of Rome wished to triple assur-ance: The 760 m long sewer pipe DN 600 and DN 800 was therefore realized with a HOBAS CC-GRP Double Pipe System. This consists of two pre-assembled coaxial pipes which are kept in position with spacers. Their purpose is to allow keeping an eye on possible leakage and to collect the water from the inner line in the clearance between the pipes in (the almost impossible) case of such. HOBAS Double Pipe Tees serve for inspection and optional cleaning of the inner pipe and planimetric curves. These were utilized instead of double pipe manholes due to the limited space in the multipurpose water pipe.

Since the pipeline was installed on saddles and once again because of the lack of space, two winches were used to assemble the pipes by pulling them together via their couplings pre-mounted on one end. The easy installation thanks to the push-to-fit HOBAS FWC Sym-metric Couplings and the relatively light weight of the material resulted in an average installa-tion rate of 36 m of pipe per day and included mounting the necessary girders, saddles and steel grids.

Construction works for the City of Sports are expected to be completed in 2013. Although invisible to the public, HOBAS will then belong to one of Romes numerous beautiful sites that will be frequented by students, sportsmen and tourists.

Fmd: hobas.italy@hobas.com

Year of construction

2010

Total length of pipeline

760 m

Diameter

DN 600/700 and

DN 800/900

Pressure class

PN 1

Stiffness class

SN 5000 10000

Installation method

Installation in a tunnel,

on supports

Application

Double Pipe SewerLine

Designer

SRdigital s.r.l. - Roma

Awarding authority

Municipality Rom

Client and Contractor

T.V.S.c.a.r.l. Fano (PU)

Advantages

Triple safety with pos-

sibility to monitor the

systems tightness; easy

installation; complete

double pipe assortment;

light weight

1 Cf. www.archiportale.com

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Pragues UndergroundFresh and Clean Water Supply with h Potable Water Pipes, CZ

Year of construction

2010-2011

Total length of pipeline

3.170 m

Diameter

DN 150, 200, 300

Pressure class

PN 10, 16

Stiffness class

SN 12500

Installation method

On supports

Application

WaterLine

Client

OMI Praha

Contractor

KSF, spol. s r.o.

Advantages

Corrosion resistance, low

weight, easy handling,

long service life

In Europe, underground potable water mains were first installed in dense-ly populated areas around the mid-19th century. The systematic establish-ment of a water network in Prague was taken up in 1968. This was partly conducted in open trench and partly with trenchless methods. During the 70s and 80s of the past century, the citys outskirts were connected to the network as well, so that its total length today spans more than 90 km. Meanwhile some of the networks pipelines have, however, reached the end of their lifecycle and call for professional renewal.

A project to renovate the water supply line of Modany, a fringe area of Prague that lies right at the Vltava River, was launched in 2010. The old steel pipe was installed in a tunnel and was fixed to steel supports and bituminous insulation every two to four meters. It had deteriorated over the course of time and was seriously damaged. To ensure a safe water supply for the population the authorities in charge were presented with two material options the lines replace-ment: cast iron or glass fiber reinforced plastic pipes.

The many advantages unique to CC-GRP Pipes convinced the inves-tor and he opted for HOBAS Potable Water Pipes as well as Fittings (bends, tees, etc.) to be connected with cast iron couplings. The relatively low weight and the therefore easy handling of HOBAS Products were crucial factors in the decision making process. HOBAS Pipes DN 150 with 2.9 and 5.8 m length as well as DN 200 Pipes at 2.95 and 5.9 m length and a stiffness of SN 12500 were delivered accord-ing to the clients and projects requests. Their installation was conducted half a meter above tunnel ground replacing not only the pipeline but also its supports that hold the pipes at their couplings and at the center of their length. A piece of natu-ral rubber is used upon recommendation of HOBAS at the pipes center support and a belt is fixed around the cou-plings. In addition to this, anchorages are fixed to the bends in order to firmly resist the water pressure.

HOBAS Pipes have a service life of up to 100 years. Modanys inhabitants can therefore rely on a long last-ing potable water supply and the client on an equally long almost maintenance-free time.

Fmd: hobas.czech@hobas.com

h PipeLine | January 2011 | Page 03

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E Engineering GmbH | Pischeldorfer Str. 128 | 9020 Klagenfurt | Austria

T +43.463.48 24 24 | F +43.463.48 21 21 | info@hobas.com | www.hobas.com

February 2011

PipeLineContents

1 | Self Cleaning Waste Water Storage Tank, UK

3 | Safely Stored by All Means, PL

5 | h for a Change, NL

Self Cleaning Waste Water Storage TankVacuum Flushing System with h Fitting in Fife, UK

For coastal communities the historic solution to sewage disposal has long been straight forward; simply to put it into the sea. 20th century improvements introduced some treatment before send-

ing to a sea outfall but still had the inherited problem that the sewer system was designed as a combined sewer and storm water line (meaning that rainfall is also sent in to the

sewer): At times of high rainfall the incoming flows exceed the capacity of the plant and have to be discharged directly to sea without treatment. These obviously

environmentally unfriendly practices are now no longer accepted and work continues across Scotland and the UK to modify the drainage and sewage

systems to prevent these unacceptable intermittent discharges (UIDs).

The answer to this is the use of online and offline storage tanks to hold exceeding flows back until they can be correctly processed.

Such a project required the construction of the Dysart Pump Sta-tion in Fife, Scotland, with a 12.5 m ID (inside diameter) con-crete tank that stores up to 800 m3. It is however the nature

of offline storage tanks that considerable deposits are left after each use so they require some cleaning process after-wards. To avoid this Dysart Pump Station uses a vacuum system to hold back a column of the