Tevi necirculare - HOBAS

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NC Liner



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Production ofh NC Liner

Years of ExperienceMany European cities started building modernsewer systems in the middle of the 19th cen-tury. Still surviving today, the large sewers withspecially shaped cross sections are the resultof great feats of engineering and the foresightshown by the city fathers at that time. Aftersuch long periods in use, however, renovationoften becomes inevitable despite regular main-tenance. HOBAS NC Line Pipes with their non-circular cross sections are ideal for rehabilitatingthese old sewers and building new ones. Man-hole renovation solutions and relining pipesround off the HOBAS Rehabilitation range.

ManufactureHOBAS NC Products feature a particularly resin-rich inner layer. First this layer is applied to a re-lease lm and then the lament winding process

begins. Pipes can be designed for specic loads

and project requirements, while also taking struc-tural dimensions, customer specications and

regulations regarding chemical resistance intoaccount. Once the winding process is comple-ted, the pipe undergoes nishing and is then

removed from the mandrel. Depending on thesize and wall thickness, the completed pipe istempered for several hours to ensure that thepolyester resin is fully cured.

During installation, the pipes are pushed or pulledinto the existing pipeline and the remaining an-nular space between the host and liner pipes islled with pressure-resistant grouting, usually

a mixture of binding materials. This xes the in-serted pipe in position, creating a pipeline of thesame integrity as a new one.



Verbindungssystem

Joints and Couplings

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Type I kit:Standard joint with EPDM gasket

Adhesive

EPDM gasket

Type II kit:Adhesive joint forspecial applications

Resin-rich outer layerwith quartz sand lling

Structural layer withresin/randomly

oriented ber/winding

roving and quartz sandlling

Barrier layer withrandomly orientedber

Resin-rich inner layerwith quartz sand lling

Old sewer

Grout

Sealing

Existingconnection pipe

GRP protection pipeaccording tolocal measurement

NC Line Prole

Hand lay-uplaminate



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h NC Liner Proles

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The range of available HOBAS NC Line Proles and therefore the pipe

cross sections is just as varied as the history of wastewater disposal itself.

In addition to classic regular cross sections, such as circular, egg, jawor kite-shaped pipes, we more and more manufacture combinations ofshapes on request. Having perfected the necessary manufacturing tech-nologies, HOBAS is regarded as a specialist for solving complex rehabi-litation problems.

Such expertise naturally also includes the relevant joining technology.Where shapes are completely convex, we generally join the pipes withpush-on couplings, while we use glued or laminated joints for combina-tions of convex and concave or even shapes.

Suitable shaft structures and tangential manholes also feature in our rangeof products. We can therefore supply customers with a complete systemincluding pipes with special cross sections, lateral connections and man-hole structures.

Kite-shaped cross section

Elongated egg-shaped cross section

Egg-shaped cross section

Jaw-shaped cross section withdry weather channel

Jaw-shaped cross section



h NC Liner Applications

HOBAS NC Line Pipe Sections not only enable you to overcome a widerange of challenges in rehabilitation but also in building new supply anddisposal systems. The material properties and cross-section shape tobe used are determined for each specic application. Particularly when

other materials have reached the end of their life cycle or failed pre-maturely, our pipe sections are a long-lasting option.

NC Line Products are ideal for conveying Community sewage Industrial wastewater Raw water Potable water Chemically aggressive wastewater

The special material properties, shapes and jointing optionsresult in the following advantages: Good hydraulic performance under various loads Flexibility in difcult installation situations

Self-cleaning properties when ow is low

Low maintenance costs Connection options for various materials High static load capacity Short installation times Installation in uid environments

Long service life

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Top QualityHOBAS Plants are certied by independent insti-tutes to various international standards, ensur-ing that the nished products meet the highest

customer specications. Not only compliance

with ISO 9001 but also uniformly high qualitystandards is a key feature of HOBAS Productsand rmly rooted in our corporate philosophy.

The quality management system covers allareas, including new product development,quality control processes, shipping and service– what you receive is consistently high qualitywithout any ifs or buts.

Our comprehensive quality control programmeets international standards as well as takingspecial customer specications into consider-ation. HOBAS holds the octagon quality markissued by Germany's TÜV technical service andmany other approvals. Auditors from renownedcertication companies and our specialists in the

HOBAS R&D departments, application engineer-ing and installation teams ensure that you canrely on consistently high, uniform quality nomatter from what country the pipes are deliv-ered to you. Our internal HOBAS Quality ControlProgram also includes the following qualityassurance measures: Testing the raw materials Testing the semi-nished products

Testing the services Release testing for production Strength testing on nished products

Visual inspection and dimension checks onnished products

Hydrostatic and hydrodynamic testing Calibrating the instruments Ensuring the identication and traceability of

the products Checking planning and design Checking the suppliers

Optimal Service and Highest Quality Standards

Reliable ServiceAs a system supplier, HOBAS attaches greatimportance to service. Our experts will supportyou to ensure that your project runs smoothly– from initial planning right through to comple-tion. HOBAS is committed to providing cus-tomers worldwide with a broad product rangeand professional support.

A matter of course for us: Technical advice for planning, installation and

rehabilitation Feasibility studies Structural analyses to comply with various

regulations Design and drawings for manholes, struc-

tures and custom constructions in 2D and 3D Consultancy, training and support for building

contractors Installation services Technical documentation and information

material On-site support during construction work

from HOBAS Technicians



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HOBAS NC Line Products feature:

Variable length of pipeline (to customer specications)

Customizable cross-section shape Option of various jointing systems High static load capacity High hydraulic capacity High corrosion resistance Tested abrasion resistance Easy handling Installation without any signicant trafc disruptions

Installation irrespective of the weather Compatibility with all HOBAS Pipe ranges Little incrustation and sludge deposits Minimal trench width, therefore easier for working

on sites with restricted space (inner city)

Environmental benets – towns and landscapes

do not suffer as a result of construction work Prevention of falls in the water table level Very long service life of up to 100 years

h NC Liner : Impressive Benefts



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At the beginning of the 20th century Dresden’s sewer system was al-ready 430 kilometers long. An essential part of the sewer system withconnection to the wastewater treatment plant Kaditz is to this date the“Altstädter” collector, which underpasses a big part of Dresden’s historiccenter.

One of the interceptors in the old town was made of tamped concrete.Inspections revealed damage meaning that their load capacity could nolonger be guaranteed: the sewers urgently needed to be repaired. Over1.3 km in length, the section to be rehabilitated ran through the old townand along the banks of the Elbe. As an attractive destination Dresdendraws some 7 million visitors every year. In view of this situation, the onlyoption was trenchless rehabilitation by relining. Compared with open-cutinstallation, construction time would be speeded up and disruptions totrafc and tourism reduced to a minimum.

Dresden’s utility company weighed up the various alternatives but de-cided in favor of HOBAS NC Line Pipe Sections made of GRP. Thanks tothe smooth inner surface of the HOBAS Special Pipe Sections with ak value of ≤ 0.01 mm, the hydraulic requirements were still met despite

the reduction in diameter. The rst step was to assess the condition of

the existing pipes by inspecting the old sewer, calibrating it by laser scanand manually with a template in places to determine the exact outsidedimensions for the individual NC pipe sections. Our aim was to makebest possible use of the old sewer while ensuring easy installation at thesame time. What we came up with was an installation plan with regular,short and special pipe sections with bevel joints. In areas with particularlypronounced angular deection the prefabricated curved parts were joined

using GRP hand lay-up. The prefabricated HOBAS NC Pipe sections can beproduced with any wall thicknesses required, thus compensating for anystructural imperfections in the old sewer.

Opting for two construction stages, we installed a total of 520 m HOBASNC Sections with inside dimensions of 2,157 x 2,129 mm and 320 mwith 2,242 x 2,195 mm. After completion, the interceptor was totally re-habilitated and will operate reliably for the next hundred years even in the

event of ooding. The many tourists hardly noticed what was going

on, with the only evidence being the pipes stored nearby and thefew access shafts for the important work under the streets of

Dresden’s old town.

Fmd: [email protected]

Unnoticed Under Historic Dresden

h NC Liner Pipe Sections Rehabilitate Sewer, DEYear of Construction

2009

Total Length of Pipeline

HOBAS Pipe: 880 m

Pressure Class

PN 1

Diameter

2157/2129,

2242/2195 mm

Installation method

Relining with short proles

Client

Stadtentwässerung

Dresden GmbH

Special Features

Pipe cross sections

designed to t the old

sewer, no disruption to

tourism/trafc, high

quality, high delivery

reliability



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No Dig Award for Relining withh NC Line®

h NC Liner Sections Replace Sewer System in Tilburg, NL

The sewer in Sint Josephstraat is an important link to the wastewatertreatment plant and the combined overflow. Built in 1928, the concretesewer base with the brick arch is in the shape of an inverted egg withinside dimensions of 1.90 m wide by 2.15 m high. In the late 1990s, workon the road above put a considerable strain on the sewer. Inspectionswith radar systems revealed that cavities had formed beside it becausecracks in the sewer had caused sand to be washed out here. As injectingresin into the cracks did not prove as successful as hoped, rehabilitationwas unavoidable.

Analyses showed that the sewer masonry was actually intact, but theconcrete sewer base had suffered greatly in recent years. Attempts atrepairing the base also failed because the structural damage was notrectified. In order to guarantee structural safety as well, the only answerwas to rehabilitate the old sewer or install a new one. A total replace-ment would have involved extensive construction work in open trenches,which would have been very expensive, and so relining was the onlyfeasible option. What was important to the local authorities was reduc-ing the diameter by a maximum of 10 cm. Angular deformation in thehorizontal plane over the route of the pipeline where rehabilitation wasrequired also had to be taken into account.

Tilburg city council opted for HOBAS NC Line Products to reline the pipe-line. The decisive reasons were the high standards of HOBAS Products,experience with installation, the tested, consistent material quality, highstiffness and adaptability, enabling only a slight reduction in diameter. Inaddition, when HOBAS Products are used the sewer can continue to beoperated during installation even if there is heavy rainfall. The tenderalso specified many different fittings (manholes, pipe inlets, etc.)

which HOBAS supplied tailor made for the site.

After calculating the wall thickness of the pipe segments to be26 mm, the client designed a special transport cart for install-ing the pipeline. During the construction work the wastewa-ter was diverted. In the event of heavy rainfall, the existingsewer could however be evacuated within 15 minutes andthen be used. The pipes were fixed in place to preventthem from floating and the annulus between the newand existing pipeline filled with grouting.

HOBAS NC Line Products proved to be the right choicefor rehabilitation, as a panel of experts selected the

project for the NSTT (Netherlands Society for TrenchlessTechnology) No Dig Award in 2009.


Year of Construction

2008

Construction Time

5 months


860 m

Pressure Class

PN 1

Diameter

2150/1900 mm

Installation method

Relining

Client

Community Tilburg

Contractor

Heijmans Infra techniek BV

Special Features

Custom pipes, leak

tightness of the system,

high quality, only slight

diameter reduction

when relining



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h Pipes in All Shapes and Sizes

New Sewer System for Krakow, PL

Krakow is one of the oldest cities in Poland with a sewer system totaling1,780 km in length. In 2007, the city council put rehabilitation of 5 km ofsewer pipes under 13 roads out to tender. The concrete pipes dated backto 1900 - 1945 and showed considerable damage: Leaks and cracks putthe surrounding soil at risk and as most of the pipelines run under heavytrafc routes, the static load capacity of the sewers also had to be en -sured. Having already had very good experience with HOBAS Products,contractors PBG - INFRA - PBRSP Kielce had no difculty in selecting

the right material.

Numerous special sections were custom made to t the sewers. To

rehabilitate the oval sewers, HOBAS NC Sections in 1,710/1,810 mmwere produced in three different lengths: 2.35 m long pipes wereused in the straight parts and 0.5 - 1 m long ones in the curved parts.Most of the rehabilitation work was in the city center. Here thesewers not only have to withstand heavy trafc but also the weight

of the streetcars. HOBAS Egg-Shaped Sections in sizes 600/900,680/1,050, 750/1,120 and 900/1,350 mm were used under the citycenter streets.

As far as the sections for rehabilitating Wandy road and Daszynskiegoroad were concerned, the HOBAS Experts had to be really creative.

Given the special shape of the sewer, they could not use regular NCproducts. The HOBAS Engineers therefore took a HOBAS Jaw-ShapedSection, joined the bottom to a circular HOBAS Pipe and completedthe part with a at plate made of GRP. In Daszynskiego Road, a circular

HOBAS Pipe was added to the underside of a jaw-shaped section, thusensuring that even when the water level is low the sewage is reliably

conveyed. The individual parts of the unusually shaped sections weresecurely joined together with laminate. Ever resourceful, the HOBAS

Experts also found a custom solution for the couplings: As theycould not use regular couplings, they joined the sections with

epoxy adhesive. The next step was to carefully ll the annulus

between the old sewer and HOBAS Section.

Construction work was nished to the complete satisfaction

of everyone involved in the project. The professional adviceon the part of HOBAS, the tailor-made special sections andthe quick and easy installation left the contractors in nodoubt that they had made the right choice.



2008 - 2009


3.8 km

Diameter

600/900 - 2677/2075

Pressure ClassPN 1

Installation method

Relining

Client

Krakow water and sewer

works

Contractors

ARGE PBG - INFRA -

PBRSP Kielce

Special Features

Special sections in

various different shapes,

mechanical properties,abrasion resistance,

chemical resistance,

easy installation



© E Engineering GmbH

Responsible for content: Wilfried Sieweke, Sabrina Sereinig | Texts & Layout: Sabrina Sereinig, Sabine Friesser

Publication: 04/2011 | Update: 03/2012 | Print: Carinthian Druck Beteiligungs GmbH 03/2012

All rights reserved. No part of this document may be reproduced or utilized in any form or by any means without our prior writ ten permission. All informa-

tion in the document is correct at the time of going to press. However, we reserve the right to make changes without notice, in particular to technical data.

The data given is not binding and must therefore be checked in each individual case and revised as appropriate.

Rehabilitation under Extreme Conditions

h System Solutions Impress French Guiana, GF

French Guiana (overseas department of France in Central America) set

about renewing a large number of the culverts in its national road net-work in 2005 and 2006. Installed in the 1970s and 1980s, these culvertsmade of concrete or steel had become badly damaged and therefore hadto be rehabilitated as fast as possible.

Extreme tropical weather conditions, heavy loads over the culverts andwater with a pH of between 3 and 6.5 placed high demands on boththe material and building contractors. In addition, the hydraulic capacityalso had to be maintained or increased and the material had to withstandabrasion from sand. The difficult geological conditions compounded thesituation.

Having taken many different materials into consideration, the client finallyopted for HOBAS Products. The project required both circular and non-circular HOBAS Products, which were installed using open-cut, jackingand relining techniques. Custom HOBAS NC Line Pipes with a crosssection of 1,660/1,260 mm through 3,200/2,050 mm and round HOBASPipes De

600 through 1,229, SN 10,000 through SN 40,000 now ensure areliable, leaktight pipe system.

Apart from corrosion resistance, what again proved to be the greatbenefit of HOBAS Products was fast and safe installation that didnot disturb nature or disrupt the traffic flow.

Everyone involved was very pleased with the results ofthe project and the custom system solutions suppliedby HOBAS. So much so that the French authoritieswill also be happy to consider HOBAS for othertenders in the future. Fmd: [email protected]


2005 - 2006

Diameter

De 600 - 1229

NC Liner 1660/1260 –

3200/2050 mm

Stiffness Class

SN 10000 - 40000

Application

Rehabilitation

Client

Ministry of Equipment

and Transportation

Contractors

Devin Lemarchand

Environnement

Special Features

Corrosion resistance,

high static load capacity,

installation irrespective

of weather

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We develop and manufacture HOBAS Products conserving nature‘s

resources and with respect for our environment. Visit our website to

fnd out more about the HOBAS Environmental Policy.

E Group Worldwide

HOBAS manufactures and markets HOBAS GRP Pipe

Systems. The HOBAS Network includes HOBAS Production

Facilities and Sales Organizations in Europe and throughout

the world.

E Engineering Austria

Pischeldorfer Strasse 128

9020 Klagenfurt | Austria

T +43.463.48 24 24 | F +43.463.48 21 21

[email protected] | www.hobas.com

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Tevi necirculare - HOBAS