pipe world - issue 15 fintherm

7/28/2019 Pipe World - Issue 15 Fintherm

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THE KWH PIPE CUSTOMER JOURNALISSUE 15 WWW.KWHPIPE.COM

Weholite guaranteesa hundred-yearliespanpage 6WehoarCtiCWont letthe pipes reeZepage 10

dont Count onluCk to proteCtyou rom loodingpage 14
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15

Be prepared instead

o going With the loW

4 i B

6 WwThe decision to invest in a detention

structure constructed rom Weholite

provided an environmentally riendly

solution in Quebec, Canada.

9 swWeholite pipe oered the most

suitable solution or the outall

channel in Maricopa County, Arizona.

10 p- The Wehoarctic system ensures

that pipes wont reeze even in

the harshest reezing conditions in

the Russian city o Vladivostok.

12 i PE-HD liner protects steel pipes

against abrasive mining slurry

in Laos, Southeast Asia.

13 swWeholite pipes were chosen

or a new residential area

in Malm, Sweden.

14 swA waste power plant in southe

Finland chose one-hundred-

metre long Weholite tanks.

17 swThe village o Prestbury, Engla

benets rom a new innovativ

food management system.

18 i Floating pipes are being used

in Sweden to bring an open p

mine back into production.

19 icRecord breaking culverts spee

up road project in Norway.

20 eWeholite was used to construc

a penstock or a new hydropow

plant in Cieszyn, Poland.

23 swA project in Hereord, UK,

uses an innovative energy

dissipation technology.

puBlisher KWH Pipe Ltd, P.O.Box 21, FI-65101 Vaasa, Finland t +358 20 778 7111 tx +358 20 778 7901

www.w.c editor in Chie Mr John Reinlund pipe World editorial Board Mr Noppadol Dhammaniyom,

Ms Marlene Fremleson-Ohlis, Mr John Reinlund, Mr David Siteman and Mrs Monika Tarnawska, KWH Pipe

editor Viestinttoimisto Supliikki, Ms Outi Jrvel, Tel. +358 40 577 1844 printer Oy Fram AbPE PP PV

ithink everyone has seen the pictures o Venice

Italy where residents have to walk on wooden planksto stay above the oodwaters in large parts o the

city about our or ve times a year. Te problems o

Venice are o course unique but we could soon

be seeing wooden planks in our own cities. Increased

precipitation due to climate change orces us to take a

good look at our stormwater systems and our prepared-

ness or coping with heavy rainall.

Urbanization is one o the megatrends in the world

o today and tomorrow. Tis means that more and more

people live in cities and more land surace is being

covered by hard suraces such as asphalt and concrete.

Old piping systems might not be properlydimen-

sioned or the circumstances o the present and theprojected uture. Additionally due to the scarcity o

land buildings are constructed in low-lying areas that

previous generations deemed unsuitable.

Hard suraces can cause changes to natural water ow

patterns. For example more water runs o at a aster rate

rom streets and car parks than rom lawns or a orest.

Vegetation serves to slow the ow o water and increase

its inltration into soil and groundwater storages. Tis

enables the water to low more gradually into water-

courses over a longer period o time. In the absence o

vegetation the increased ow generally results in erosion

and scouring o the receiving watercourses.

Tere are several ways to mitigate the consequences

o increased stormwater runo and the pollutants that

it might carry. he best solution must be determined

on a case-by-case basis and oten you would have to

employ several methods to achieve the desired result.

In this issue o Pipe World we present projects where

KWH Pipe has played a role in storm-

water management preventing ex-

treme rainall rom destroying valu-

able property. Other articles include

mining projects and hydropower. Let

us take you on a trip o recent pro-

jects that display sustainable pipingsolutions in places rom Quebec to

Laos Vladivostok to England!

Jan-Erik Nordmyr

President & CEO KWH Pipe Ltd.
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WWW.KWHPIPE.CO

M

o c c cvIn Finland, KWH Pipe has reorganized its business in order

to eliminate overlapping unctions, fatten organisational

structures and decrease overhead costs. The objectives o

the organisational changes are to serve customers better, re-

duce costs and react more quickly to market developments.

Due to historical reasons, KWH Pipe Finland (plastic

pipe systems), KWH Thermopipe (pre-insulated products)

and Technology (plastics technology) operated indepen-

dently under the umbrella o KWH Pipe Holding. As o

1 January 2012, these our organisational entities merged

into the unied KWH Pipe Ltd. Support unctions, or ex-

ample purchasing and marketing, have been combined so

that they now serve the whole company. Sales o pre-insu-

lated products have been integrated with sales o plastic

pipe systems to better serve large customers. The newly

ormed machinery and license sales department will ocus

on ewer product areas than

in the past and outsource

some unctions to its partner

network. Extron Engineering

Ltd was not aected by the

organisational changes.

Mr J-e n, Presi-

dent and CEO, says o the

organisational changes: The

nancial crisis that has swept

through the world during the past ew years has made it

necessary that all companies take a good look at them-

selves and how to adapt. We believe that the changes we

have made will make us more competitive. KWH Pipe is

leaner and stronger and the sales team can now oer the

broadest product portolio in Finland. n

IN

bRIEf

The high-rise condominiums in the Sathorn district

o Bangkok, Thailand, have become the most de-

sired addresses in the luxury segment. Most o the

new construction projects have adhered to green

building principles in order to protect the envi-

ronment. One o these is the Urbano Absolute, a

40-foor residential building with a stand-alone pa-

vilion, developed by Pruksa Real Estate Plc. The

new high-rise building with 593 fats is situated

in the middle o the business district, where there

are many embassies and oces o major interna-

tional companies.

When it comes to obtaining construction permits

in this district, the Environmental Impact Assess-

ments (EIA) committee has to approve the project.

a x b B W v .

One o the issues that the EIA watches closely

is that the ventilation system does not have

a negative impact on other buildings and the

nearby environment. For Urbano Absolute, 200

metres o 800 mm SN4 Weholite was installed to

convey exhaust air rom the main blower on the

parking lot foor to a large garden with plants that

can absorb the carbon dioxide. The designer,

Mr t C, a mechanical engineer

with W. and Associate Designs Co., Ltd., stated:

Utilizing Weholite or the ventilation system

meant that it could be installed aster than with

metal pipe and that it will have a longer opera-

tional lie. Weholite is also lighter, which means

that the load on the building is minimized. Mr

s, Project Engineer or Teo Hong Silom

Co. Ltd. and the main contractor or the pro-

ject, stated: I like the easy and ast installation

o Weholite. We can work aster under a very

tight construction schedule, which lowers costs,

meaning that we can reduce the total budget. n

W v

pipe world ISSUE 154
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APPOINTMENTS

KWH Pipe has launched a Facebook

page to promote the use o HDPE pipe

in North America. It oers inormation,

including pictures and videos, about pro-jects that have made lie easier or en-

gineers and society, as well as about new products and

upcoming events. ://www.cb.c/hdpepipen

kWh p vus C c cb!

In Poland and the United Kingdom, KWH Pipe hasmoved to new locations. Our oces can be ound at:

p:

KWH Pipe Poland Sp. z o.o. (Ltd)ul. Dzielna 60PL-01-029 Warsaw, POLAND

The telephone and ax numbers as wellas all the contact inormation or the actoryin Kleszczw remain unchanged.

u k:KWH Pipe (UK) Ltd17 Shirwell CrescentFurzton LakeFurzton, Milton Keynes, MK4 1GA, UKPhone: +44 (0)1908 507 690Fax: +44 (0)1908 507 704

When large amounts o rainall overwhelm both natural

and man-made drainage systems, the consequences inurban areas are almost always severe. Intense rainall

events are expected to become more requent in some

areas o the world as a result o climate change, and

municipalities have started to plan how to minimize

damage. Detention tanks made o Weholite are being

used in many cities to help cope with fash storms that

otherwise would have put the community at risk o storm

drain overfows. The structured-wall, PE-HD detention

tanks are lightweight and arrive at the installation site

ready to be installed, which makes them easy to handle

and reduces on-site costs and

trac disturbances. They are also,

o course, watertight.

t v o how the deten-

tion tanks work, scan the QR code

below or go towww.w.c. n

nw c p u k

W c b w c v f

m J r, B.Sc.(Eng.), has been appointedProduction Director,KWH Pipe Ltd. as o1 January 2012. He haspreviously worked as

Executive Vice President,District Energy.m J k,B.Sc. (Eng.), has beenappointed Sales andMarketing Director, KWHPipe Ltd. as o 1 January2012. Additionallyhe has been appointedManaging Director oKWH Pipe Eesti AS inEstonia. He has previouslyworked as Executive VicePresident, Pipe Finland.m C Bc, B.Sc.(Eng.), has been appointedSupply Chain Manager,

KWH Pipe Ltd. as o1 January 2012. He haspreviously worked asPurchase and QualityManager, KWH Thermopipe.m J t has beenappointed Purchaser, KWHPipe Ltd as o 1 May 2012.He has previously workedas a Customer ServiceRepresentative, MunicipalTechnology in Finland.m s a,BBA, has been appointedCustomer Service Manager,KWH Pipe Ltd. as o1 January 2012. She

has previously workedas Customer ServiceManager, KWH Thermopipe.

n acm mc l has beenappointed Regional SalesRepresentative or KWH PipeCanada. Michael is basedout o Denver, Colorado,and will ocus on growingthe Weholite business as wellas promoting WehoEnergyGeothermal Vaults throughoutthe Rocky Mountain region.

d

m h-k h-Bc,has been appointed newManaging Director oKWH Pipe (Danmark) A/Sas o 1 October 2011.He has previously workedas Marketing Manager,KWH Pipe (Danmark) A/S.m h s dj, Manu-Facturing Engineer, has beenappointed Customer Serviceand Supply Chain Manager,as o 1 February 2012.He has previously workedas Manager, Productsand Customer Service.

swm tb t, B.Sc.(Eng.), has been appointedSales Manager or preinsulaed products in SouthernSweden as o 1 March 201He has previously worked

as Manager, DistrictHeating Network, at MjlbySvartdalens Energi.

em C V, B.Sc.(Eng.), has been appointedManager, Project Services,as o 1 May 2012. He haspreviously worked as ProjecManager, Project Services.m V p, B.Sc. (Enghas been appointed ManageFPS solutions, as o 1 May2012. He has previouslyworked as FPS coordinator.

tm Wb swhas been appointed VicePresident, Sales & Marketino Wiik & Hoeglund (Public)Company Limited, Thailandas o 2 April 2012.

pm mcj pzb,M.Sc.(Eng) and MBA, has beenappointed Managing Directoo KWH Pipe Poland Sp. z.o(Ltd) as o 11 June 2012.He has previously workedas Managing Director oReyners Polska z.o.o.

ex em J m, B.Sc. (Eng),has been appointed DirectoMachinery and Licensesales and Managing DirectorExtron Engineering Ltd.as o 1 January 2012.He has previously workedas Executive VicePresident, Technology.m m r,B.Sc. (Econ.), has beenappointed Oce Manager, tron Engineering Ltd.as o 1 January 2012.She has previously worked

as Project Assistant,Extron Engineering Ltd.m a n,B.Sc. (Eng) has beenappointed Project Manager,Extron Engineering Ltd. aso 1 January 2012. He haspreviously worked as ProjecManager, Project Services.

pipe world ISSUE 15 5
http://www.facebook.com/HDPEPIPEhttp://www.kwhpipe.com/http://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/M.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/M.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://localhost/var/www/apps/conversion/tmp/scratch_1/B.Schttp://www.kwhpipe.com/http://www.facebook.com/HDPEPIPE


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TeXT

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kWhpPHOTOS

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Cso b.

WASTEWATER

the practice o collecting both sanitary sewage

and stormwater in the same piping system has

been banned in many parts o the world butthe combined sewers still in use continue to

give municipal engineers headaches. During

big storms when the system is unable to cope with the

stormwater runo untreated wastewater is discharged

into the environment. Tese combined sewer overows

(CSO) can cause serious water pollution problems and

thereore many countries require municipalities to make

improvements to reduce or eliminate the consequences.

hundred-yearliespan



7/24

Tere are many ways to address the com-

bined sewer overow such as CSO storage

structures expanding sewage treatment ca-

pacity screening and disinection acilities

retention or detention structures and sewer

separation. Communities may also implement

green building techniques to reduce owso stormwater into the collection system.

Te town o Sainte-Agathe-des-Monts in

Quebec Canada aced the problem o re-

peated overows due to sewers being over-

loaded by stormwater. Looking or an anal-

ysis o the problem and the best long-term

solution the municipality decided to con-

tact the international engineering consult-

ants Te S.M. Group International (SMi)

which happened to have an oce in Sainte-

Agathe-des-Monts.

a c c w c

Te experts and the municipality considered

dierent options. In particular they looked

at increasing the capacity o the wastewater

treatment plant so that it would be able to treat

all combined wastewater coming rom the

existing system without overows. Another

solution proposed was building a detention

basin and temporarily storing the combined

wastewater and conveying it to the treatment

plant at a rate at with which the treatment

plant could cope. It was eventually decided

to design and construct a detention basinand to look or high-perormance products to

accomplish this task.

Te Brissette Intercepting Sewer project

entailed the installation o a 3000 m3 large

detention basin or collecting and tempo-

rarily holding combined wastewater which

would eliminate CSO in nearby water bod-

ies. A closed structure was chosen over an

open reservoir.

sv cc

he project included several critical ele-

ments. First o all the total cost estimated

at 3-4 MCAD represented a hety sum or a

municipality o this size. In order to be eligible

or subsidies rom MAMRO a government

ministry in the Canadian province o Quebec

it was not allowed to speciy a certain mate-

rial in the invitation to tender. Also receiving

public unding required costs to be minimized.

It was important thereore to opt or the most

economical and durable option.

Te project was also cha llenging rom a

technical point o view. Te soil itsel was

made up o very dense glacial moraine which

made excavation to a depth o three to ve

metres very dicult. Next to the sewer main

there was a high-pressure gas transmission

line and other inrastructure which limited

the space available or the manoeuvring o

machinery during the installation. Also

the high water table in the area necessitated

pumping in order to keep the installation

site dry. Te low total liecycle costs and theease o installation (which reduces the cost o

manpower equipment and the time required

to complete the project) would thereore be

decisive elements in the tendering process.

Te perormance o large diameter plastic

pipes subjected to low pressure was an issue or

close study and the invitations to tender had

to include both traditional and innovative in-

stallations. Authorities in charge o nancing

were extremely careul because although the

use o large diameter plastic pipes is common

in the U.S. and elsewhere in Canada no sim-

ilar project had been carried out in Quebec. u

pipe world ISSUE 15 7 w issue 15


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pe-hd pipe

oered superior

resistanCe

to Corrosion,

aBrasion,

ChemiCal

suBstanCes,

road salts,soil moVements

and ChemiCal

reaCtions

Caused By

seWer gases

in ComBined

WasteWater.

e

Mr. Sylvain Racette an engineer at Soleno exclusive

distributor o Weholite products in Quebec comment-

ed Te challenge or our technical team was to respond

both to the overall characteristics and to the specic

demands o the project. One o the challenges we en-

countered was convincing government authorities to

allow the use o large-diameter PE-HD pipe.

It goes without saying that Soleno spared no eort to

meet the requirements and to promote the durabilityand eciency o KWH Pipes Sclairpipe pressure pipe

and Weholite structured-wall pipe or an installation o

this scope. Other sell ing points were their competitive

advantage with regard to price and the hundred-year

liespan o the installation. Te project was unique; So-

lenos strong points were the competence o its technical

team and the quality and reliability o its products.

Soleno and KWH Pipes technical team prepared an

optimal quote respecting the particular specications

established by the engineering consultants in response

to physical constraints. Te project consisted o 448

metres o DN/ID 2290 mm (90 inches) SN 3.5 Weholite pipe

or use under low pressure (1 bar) with an inspectionchamber and riser in PE-HD connected to 488 metres

o OD 1520 mm (60 inch) SDR 32.5 Sclairpipe.

As it turned out the outcome o the tendering process

conrmed the calculations o the experts that large dia-

meter PE-HD pipe would be the most economical and

durable choice or the project. It oered superior resist-

ance to corrosion abrasion chemical substances road

salts soil movements and chemical reactions caused by

sewer gases in combined wastewater. Tis is important

since combined sewers oten carry harmul pollutants

and debris.

Te act that Weholite is available in such large di-

ameters allowed a reduction o the length o the instal-

lation. Teir 15-metre lengths and light weight make

handling easy and welded joints provide a guarantee

against leakage. Finally their total cost (materials and

installation) was lower than all competing materials.

acc wv w

In this case the project (completed in the autumn o

2011) was accomplished in twelve weeks and did notsuer rom any delays.

Te installation and jointing took only eight weeks

while a traditional installation in the view o experts

could easily have lasted a ew weeks more.

Mr. Alexandre Foisy engineer at MBN Construc-

tion Inc. commented on the project: Te use o Weho-

lite pipes allowed us to complete this project in t ime

and also to adapt to a problematic work site. In act

because o space constraints between a high-pressure

gas pipe and the municipalitys sewer main we had to

make changes to our original plan. But the speed with

which our partners in the project adapted permitted

us to limit delays caused by the situation. Engineersresponded quickly and Soleno and KWH Pipe quickly

supplied the parts necessary to make corrections.

Te decision by the municipality o Sainte-Agathe-des-

Monts to invest in a detention structure constructed

rom Weholite saved taxpayers money and at the same

time they got a durable and environmentally riendly

solution to their CSO problem. Experts say this choice

enabled them to reduce the duration o the work on-site

by a third. Other municipalities will surely ollow the

example o Sainte-Agathe-des-Monts when its time

to invest in similar inrastructure projects. n



9/24

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established in 1959 the Flood Control

District o Maricopa County (Ari-

zona USA) provides ood hazard

identication prevention regula-

tion and remediation to reduce the

risk o injury loss o lie and property damage

rom ooding in the county. Te District was

ormed in response to signiicant looding

events that plagued Maricopa County during

its early history. Te areas Sonoran Desert

environment is conducive to ooding due to

unique soil and topography characteristics

winter and summer rainy seasons and nu-

merous natural riverbeds washes and chan-

nels. During a rainstorm these normally dry

waterways can quickly become raging rivers

causing widespread overland ooding when

unchecked. Initially the District ocused on

building dams (ood retarding structures)

basins and channels to prevent ooding. Un-

precedented population growth and develop-

ment in the county since the 1990s howevershited the Districts emphasis to: dynamic

ood education programs to inorm citizens

about lood hazards; the identiication o

specic hazard areas so county residents will

make inormed decisions about where to build;

and the control o development that directly

impacts waterways through a mandated drain-

age administration and oodplain manage-

ment regulation program.

pc

An integral part o the ood control structures

called the White anks Flood Retarding Struc-ture (FRS) had surpassed its original 50-

year project lietime and developed saety

deiciencies since the time o its construc-

tion including subsidence and embankment

cracking. Tere are three Corrugated Metal

Pipe outlets that were originally installed

without seepage control. Current standards

require lter diaphragms around the outlet

pipes to prevent internal erosion o soil in a

seepage path along the outlet pipe. Investi-

gations revealed voids around the old outlet

pipes which could result in a piping ailure.

A Rehabilitation Plan and Environmental

Assessment called or FRS to provide contin-

ued ood protection while complying with

current saety and perormance standards

which entailed rehabilitation measures in-

cluding: dam modication to address em-

bankment cracking and oundation issues;

raising the dam crest; reinorcing the auxil-

iary (emergency) spillway; and install ing an

upstream diversion and ood channel to sae-

ly convey oodwaters into the FRS.

he rehabilitation project was awarded

to Lawrence Construction Company Colo-

rados oldest and most experienced Colora-do Department o ransportation (CDO)

pre-qualied contractor.

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Te primary purpose o the outall channel

is to convey discharges rom FRS no. 3 when

that acility is drained ater controlling a

major storm event. Te secondary purpose

is to provide a conveyance or local drain-

age areas west o Jackrabbit rail. Addition-

ally the outall channels route needed to

be changed so that water could be dis-

charged to a stream channel instead o into

an irrigation channel or over natural de-

sert terrain. Te project was designed to

provide 100-year protection rom south-

easterly storm water ows or properties

located east o Jackrabbit rail. Initially

it was recommended to construct the out-

all channel o concrete encased steel pipe

but structured-wall polyethylene pipe pro-

ved to be the most suitable alternative.

Te project required the placement o pipes

within a ssure-risk zone and demanded

that pipe joints remain watertight in case

ssures were to occur. Weholite by KWH

Pipe its the description thanks to their

exibility and thermal welded joints that

are as strong as the pipe itsel. White anks

FRS No.3 Outall Channel now conveys

storm water through 914 metres (3000

eet) o both DN/ID 2 metre and 1.7 met-

re (78 and 66) Weholite PE-HD parallelpipelines through and along the White

anks Mountains. Te estimated construc-

tion time to install the Weholite paral-

lel pipelines was twenty-ive days. With

the eorts made by the KWH Field Ser-

vice echnicians and Lawrence Construc-

tion the installation was completed in

only ourteen days another advantage over

competing pipes. Te KWH echnicians

were able to weld an average o ten joints

per day. he contractor leak-tested each

joint to insure weld integrity and all passed

without a single leak. he attention todetail paired with the quick installation

helped make this project a great success

or the Maricopa County Flood Control Dist-

rict Lawrence Construction and KWH Pipe.n

pipe world ISSUE 15 9 w issue 15


10/24

ENvI

RONMENT?

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HOTOS

kWhp

russias last stop. Te nal destination

on the worlds longest rail route the

rans-Siberian Express. Te home

port o Russias Paciic Fleet. he

city has recently invested billions o

euros in inrastructure construction in prepa-

ration or hosting the Asia-Pacic Economic

Cooperation (APEC) Summit in the autumn

o 2012. Vladivostok is known or all o these

things and will also soon be known or having

one o the worlds largest cable-stayed bridges.

tw

KWH Pipe is supplying a heavy duty drainage

system or the queen o bridges.

wenty 40-oot containers carrying pipes

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and other components have let the actory

in Finland. Te last containers let or St. Pe

tersburg at the end o February. From ther

they travel by train across Siberia to Vladivos

tok says Energy echnology Sales Manage

Jan-Erik Svarvn rom KWH Pipe.A Wehoarctic system has been built or th

bridge in which cast iron unnels built into

the structure o the bridge conduct rainwate

into pipes passing below the bridge deck.

Over two kilometres o pre-insulated pipe

with heat-tracing proles are being delivered

as part o the overall Wehoarctic solution.

One o the key advantages o the Weho

arctic system is its excellent insulating prop

erties. Te system uses the same insulation a

is used or district heating pipes and element

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PHOTOS

kWhp

PRE-INSULATEdPIPES

10 w issue 15


11/24

a heat-tracing cable is installed. Te joint is

insulated with polyurethane hal shells says

Jan-Erik Svarvn.

Te Wehoarctic systems casing pipes are

watertight. Pipe supports are attached to thecasing pipe and are also insulated. Tere are

no thermal bridges in the system.

Wehoarctic has a long lie and requires no

maintenance says Jan-Erik Svarvn.

z c

Te bridge is being built by the Russian com-

pany ihookeanskaya Mostostroitelnaya Com-

pania CJSC.

According to KWH Pipes head o sales in

Russia Ekaterina ihomirova Wehoarctic

was chosen because it is simply the best sys-

tem o its kind.Te system has proven itsel in many loca-

tions in Russia. Large Wehoarctic deliveries

have been made to St. Petersburg Omsk and

Labytnangi in northern Russia in recent years.

Demand is brisk according to ihomirova

because the pipes are well suited to Russian

weather conditions: with harsh winters and

acute temperature uctuations.

Te new bridge in Vladivostok will certain-

ly ace dicult weather conditions. Winters in

the city are oten ormidable and in late sum-

mer Pacic monsoon rains are widespread in

the region. When it rains in Vladivostok it

rains oten or several days straight.

Te handsome new bridge will be serving

its residents and the growing numbers o tour-

ists to the city each year come rain or shine. In

September the prestigious guests o the Russia

2012 Summit will also have the opportunity to

admire the citys new landmark. n

the WehoarCtiCsystem orthe golden horn Bay Bridge

cast iron unnels built intothe bridge structure direct rainwater

to pipes below the bridge deck.

over 2 km o pipes

with heat-tracing proles

Wehonal SN 4 250 mm PVC carrier pipe

PE 355 casing pipe

Wehonal SN 4 315 mm PVC carrier pipe

PE 450 casing pipe

pipe length 3, 4, 5 and 6 metres

over 300 insulated ttings

and has a thermal conductivity value o 0.025

W/mC i.e. almost twice the thermal insula-

tion capacity o mineral wool.

Good insulation and heat-tracing gua-

rantee that the pipes will not reeze even at

extreme temperatures. Te pipe elements are

pre-insulated at the actory ensuring consis-

tent quality every time.

It is also essential that the insulation has

excellent thermal perormance to enable the

pipe elements to be as small as possible notes

Jan-Erik Svarvn.

his is particularly important or bridgeinstallation where space is critical. Te system

must also be lightweight.

Work on the Golden Horn Bay Bridge began

in 2011 and the bridge will be opened in the

summer o 2012. Te Wehoarctic pipe system

was installed in March 2012.

Another advantage o the Wehoarctic sys-

tem is its ast installation. Te carrier pipes are

connected with a pipe coupling ater which

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pipe world ISSUE 15


12/24

laos ocially the Lao Peoples Democratic Repub-

lic is a landlocked countryin Southeast Asia and

has plenty o natural resources. In act more than

570 mineral deposits have been identied on its

236800 km2 territory. Mining o copper silver and

gold has lately become a big growth business in the coun-

try and the mining sector has made signicant contribu-

tions towards Laos economic development.

Recently United Pipeline Systems USA supported by

Wiik& Hoeglund Plc. KWH Pipes subsidiary in Tailand

introduced the PE-HD liner pipe technology ite Linerin Laos to help protect the water and slurry transporta-tion pipelines o mining operations. Te ite Liner systembegins as a PE-HD pipe that is manuactured by Wiik &

Hoeglund Plc. with a larger outside diameter (OD) than

the inside diameter (ID) o the host steel pipe.

Te ite Liner system temporarily reduces the diame-ter o the PE-HD pipe liner to allow or its insertion. When

pulling is complete tension is released and the liner pipe

expands and creates a tight t against the internal wall o

the steel pipe. Te tight-tting PE-HD liner acts as a con-

tinuous barrier between the bare steel and the corrosive

abrasive mining slurry.

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Te corrosion and abrasion resistance properties o polyeth-

ylene allow the ite Liner system to protect steel pipelinesrom a variety o chemicals and abrasives through a broad

range o temperatures and pressures. It is an ecient and

cost-eective way to protect new or existing pipelines and

its use can oten extend the lie o a pipeline ar beyond the

expected lie o an asset. Te low riction o the inner HDPE

is an added benet o the system. Te ite Liner

system

comes in sizes rom 50 mm to 1320 mm (2 to 52) in dia-

meter with larger diameters possible in certain situations.

Te quality o the inner PE-HD liner needed to be manu-

actured to close tolerances and had to be made with high-

grade raw materials in order to work perectly with the

ite Liner technology. Wiik & Hoeglund delivered in allareas and exceeded our requirements Jef Schell Gen-

eral Manager o United Pipeline Systems USA mentioned.

He went on to say We were very pleased with the per-

sonalized customer service communication and technical

support provided by Wiik & Hoeglund Plc.

Te project was completed and delivered in March 2012

and there will surely be more mining activity in Asia thatwill apply this technology.

KWH Pipe cooperates with United Pipeline Systems in

several parts o the world or similar applications. n

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13/24

since the resund Bridge that

connects the Danish capital Co-

penhagen and the Swedish

city o Malm was inaugurated

in 2000 the region has been

booming. here have always been strong

trade links between Eastern Denmark andSouthern Sweden but the bridge made it

possible or the two countries to strengthen

one another in a region without rontiers. It

is one o the most dynamic regions in Europe

a trend-setting place where innovative ideas

and products are embraced.

Tat also goes or construction both when

it comes to architecture (or example the sky-

scraper urning orso) and working methods.

When a new residential area was being

planned or a ormer industrial estate the

City o Malm awarded the construction o

roads and municipal inrastructure to Skanskaan international construction company that

has emerged rom this very region.

Skanska takes sustainability seriously and

has built this commitment into corporate

policies including their Code o Conduct

and a Five Zero v ision zero loss-making

projects zero environmental incidents zero

workplace accidents zero ethical breaches

and zero deects. Emissions rom greenhouse

gasses are measured so that the company can

ollow up on and reduce negative eects on

the environment by making smarter choices

regarding materials and work methods.

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When Skanska bid or the project o install-

ing water sewage and stormwater pipes theyinitially oered 450 metres o 1400 mm di-

ameter concrete pipes or the stormwater

network. However calculations revealed

that by changing the specications to struc-

tured-wall Weholite PE-HD pipes rom

KWH Pipe greenhouse emissions would be

reduced by approximately 110 metric tonnes

CO2

equivalents. For example transports

could be signicantly reduced.

he installation was also cost-eicient.

Although concrete would have been cheap-

er when looking at the cost o the pipes the

total installation cost o Weholite was in thiscase 1015% lower. Tis was made possible

because the installation time was merely 2.5

weeks compared to 2 months or concrete

pipes. From a quality perspective the local

network owner VA SYD benets rom having

a welded and thereore watertight storm-

water system.

But thats not all: Te installation method

improves worksite saety and reduces the

risk o workplace accidents. Robert Fred-

riksson and ommy Persson part o a pipe

installation crew at Skanska have installed a

number o pipes in trenches with water up

to their knees earing cave-ins: We dont

have to worry about that in this project. It

eels good to know that pipe installation is

developing.

Project Manager Henrik Stackebo ex-plains: Instead o liting big and heavy con-

crete pipes in two metre lengths to the in-

stallation crew waiting in the trench the

PE-HD pipes are welded on solid ground.

hey are delivered to the work site in 22

metre lengths ten o them are then thermally

welded beore eight cranes lit the whole

220 metre-long pipe section into the trench.

For this project we only need to do that

twice which means that the crew doesnt

need to spend as much time in the trench

as they once did. his way o working is

saer aster and more economical.Installer ommy Persson concludes: Its

been both interesting and un to be a part

o this type o installation which makes our

working environment so much saer or us.n

s, cca cc b w, v b -.

, W w c w b m, sw.

sc c with yourmobile phone to viewa flm clip and interviews (inSwedish) rom the installation.The video can also beaccessed on your computerat: http://qrs.ly/qs1uy4.

pipe world ISSUE 15
http://qrs.ly/qs1uyf4http://qrs.ly/qs1uyf4


14/24

TeXT

mrnnsnP

HOTOS

murhnundkWhp

i the hardest rains in 50 years and a

re occurred at the same time where

would the rainwater and re water end

up? Tese kinds o questions were con-

sidered by the planners o the energy

company Vantaa Energy and the consult-

ing and engineering company Pyry as the

drawings or the uture waste power plant o

Vantaa one o the largest cities in Finlandwere on the table.

Te goal was to prevent ooding even in

the worst case scenario. An extra challenge

had to do with the act that it had been de-

cided that the waste power plant o Van-

taa was going to be constructed in a rock-

bound hollow.

It is like a tub surrounded by 10 metres o

rock-ace. Water is absorbed into the ground

so slowly that it is better to collect it all and

dispose o it says Project Manager Markku

Vuorimaa rom Vantaa Energy.

Te waste power plant will be built on the

eastern side o Vantaa where the distance

to the river Krapuoja is quite short but this

good salmon river should not be subjected

to extra water.

It was decided that the stormwater drain-

age pipeline will be drilled through rock

built over the motorway and into an openditch where the plant is allowed to discharge

one hundred litres o water per second. So

oods must be prevented at both ends o

the pipeline.

We decided to use a stormwater deten-

tion tank says Project Manager Jarmo Salo

responsible or regional piping planning o

Pyry.

Pyry will plan and build the power plant

and supervise the whole project rom the

purchases through its commissioning.

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14 w issue 15


15/24

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he material or the stormwater detention

tank had to be selected rst. Salo thinks that

old habits would have directed the planners tochoose concrete i the rocky hollow had not

dened its own criteria. Tat is as the exca-

vation proceeded it was discovered that the

tank had to be dug deep below the ground-

water level in order to get a sucient slope

or the stormwater drainage system. Building

with concrete was no longer a viable option.

He stated that it would be substantially easier

and aster to install a polyethylene tank structure.

wo 700-cubic-metre tanks rom KWH Pipe

were chosen as the stormwater retention tanks.

sc c

Te tanks are made o Weholite pipes with

internal diameters o three metres and they

are one hundred metres long. Teir ten-metre

ends were assembled in one o KWH Pipes

plants and were brought to Vantaa at the same

time as the 20-metre pipes.

Te pipes were welded together on-site and

the tanks were pressure tested by KWH Pipe

sta ater which builders rom the contractors

Destia anchored them into the excavated pit.

Te installation was completed in Decem-

ber and in January 2012 the tanks and the yardwere already covered with portable buildings.

Weholite tanks are made o a corrosion-

resistant PE or PP prole by spiral weld-

ing. Both the outer and the inner sur-

aces are smooth. The largest possibleinner diameter is 3,500 mm (varies rom

country to country) and the transportable

length is 30 metres.

The retention tanks are equipped indi-

vidually. Thermal welding o joints makes

the tank completely watertight.

Anchoring packages that are suitable

or the site are planned or each tank.

The anchored tank will be ready to use

as soon as the eed and discharge pipes

have been connected.

a stormWaterretention tank madeo Weholite pipe

In principle the tanks could have been used

right away but the excavation work was still

going on. Te entire stormwater system wasput into operation in March.

ab

In addition to the quick installation work

Jarmo Salo required that the tanks be abso-

lutely tight. No groundwater should seep into

the tank. Salo also wanted to pay attention

to the scenario o dirtier substances getting

into the clean rain water or example along

with re waters.

Ten the pump is stopped and the water

in the tank is examined. We can decide i the

water is passed to a reservoir or contaminat-ed water or discharged to the open ditch. It is

also important that the solids that have man-

aged to pass through the stormwater cham-

bers settle down onto the bottom o the tank.

A maintenance man can climb down into

the tank and also wash it when needed.

In a normal state the pumping station al-

ways pumps water when the water level ex-

ceeds a certain level and the water will con-

tinue via the discharge chamber along the

gravity discharge pipe to the open ditch.

pipe world ISSUE 15


16/24

t jc

Markku Vuorimaa regards the completion o

the stormwater retention system as a good

intermediate point in the huge construction

project.

Te system would have been needed al-

ready last autumn when a pit or the waste

bunker was being excavated 18 metres down-

wards rom the upper rock surace level

laughs Vuorimaa.

He is in charge o mechanical installations

or the power plant the biggest o which are

still to come. he main installations twowaste boilers the associated ue gas cleaning

equipment a steam turbine a gas turbine and

a heat recovery boiler were already ordered

last year but it will not be possible to install

them or a while. According to the plans the

basic work o the boiler hall will begin next

autumn. Te rst loads o waste will arrive at

the yard in the summer o 2014.

In Finland there are already two similar

waste power plants in use and another one is

being built where the steam is passed rom

the waste boiler to a turbine and the turbine

uses it to generate electricity or district heat.

Additionally a gas turbine will also be utilized

in the Vantaa plant which will increase the

plants energy eciency.

Tere are not very many solutions o this

kind in the world in which the plant has both

a gas turbine and also a heat recovery boiler

states Vuorimaa.

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District Manager Marko Kuitunen o KWHPipe points out that polyethylene stormwater

retention tanks are not just solutions or big

industrial acilities; they are becoming more

and more important and popular in various

kinds o logistics centers and commercial cent-

ers. He states that the popularity o solutions

or stormwater retention is not only explained

by heavy rains becoming more common but

also by the expansion o built areas.

Tey are needed when there are large roo

suraces and asphalt areas says Kuitunen. n

modular Cellsoered a solutionA food may threaten a smaller area as well i the

ground does not absorb the water and i the waters

do not fow away rom the area. This was the

situation in Rauma, on the south-western coast

o Finland, in a workplace where three sheltered

homes or elderly people are being constructed.

According to V-p V o the city

Rauma, the original idea was to pump the rain-

waters directly over a hill into the nearby Rauma

River. However, ultimately they chose an alterna-

tive based on stormwater detention.

That way it was possible to use smaller dis-

charge pipes and pumps, which became more

energy-ecient.

In Rauma, they decided to use a geocellular

system. Typically, these modular cells are used

or inltration, but this would not have worked

in clay soil. So a geocellular structure was made

rom the modular cells by wrapping them with a

polyethylene lm.

The contract began at the base o the con-

struction rm Destia, where 450 modular cells

were assembled. At the construction site, they

were stacked in the excavation on a plastic lmand ormed a 17-metre-long, 6-metre-wide and

1.2-metre-high package. The lm was wrapped

around the structure and welded tight. The 120-

cubic-metre geocellular system was completed.

Only one working day, a little longer than a

normal one, was spent at the construction site,

estimates Site Manager J l o Destia.

The stormwater detention structure was ready

to use as soon as the sewer and discharge pipes

were put in place.

w issue 1516


17/24

the scheme which costs 1.5 mil-

lion in total involves connec-

ting two existing lood relie

culverts and creating a by-

pass pipeline using Weholite

the UKs leading technology

in structured-wall pipe which is manuac-

tured by KWH Pipes licensee Asset Inter-

national Ltd.

Te project is a collaboration between the

Environment Agency the Gloucester County

Council and the Cheltenham Borough

Council. Te project is being delivered by

Birse Civils and was designed to manage

peak ows rom the nearby Mill Stream and

Noverton Brook.

Te initial design o the scheme during the

planning application stage included an open

channel with a series o culvert crossings on

roads which were meant to act as a bypass

channel. Due to the nature o the topogra-phy ollowing urther detailed surveying it

was not easible to excavate and build a suit-

ably sized open channel across grazing elds

because it would have signicantly increased

the land take and created saety issues.

Asset worked with the civil engineers

Royal Haskoning and Birse Civils during

the ECI design stage providing eedback

on their preliminary sketches. When Birse

Civils was appointed Asset was able to pro-

vide them with the Weholite solution. Te

high-density polyethylene pipe allowed or

a quicker easier installation and reduced

the requirement or land take.

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Asset supplied 500 metres o DN/ID 1.2 m

and 1.35 m pipe and a number o oversized

preabricated DN/ID 2.2 m and 2.5 m in-

spection chambers.

erry uck agent or Birse Civils said:

We were really impressed with Assets be-

spoke ood alleviation solution. Tere were

many advantages to using Weholite over more

traditional methods in terms o making the

installation easier and saer or my team andmore economical or the customer.

One o the biggest advantages was that

the manholes were pre-abricated osite

which reduced the need or conned space

working and reduced the need or people to

enter excavations. Te manholes and pipes

were light and thereore easy to transport

as well as easy to store as we can double

stack them. Te manhole excavations were

backilled quickly shortening the time

required or the job.

k

he project will reduce the risk o lood-

ing to a one in 100 chance or 57 homes in

Prestbury.

Commenting on the project Craig Burrows

echnical Sales Engineer at Asset said:

By working in partnership with the Envi-

ronment Agency and Birse Civils we have

developed a lood alleviation system that

will keep the homes in Prestbury sae rom

ooding or the signicant uture.

Once again our ability to oer a range

o bespoke solutions with them all ab-

ricated osite has allowed us to provide

exactly what the project needed as wellas the additional beneits o easier ins-

tallation and storage. Te act that we can

nest the pipes cuts down on the amount

o vehicles needed or transportation

which helps reduce cost as well as the

projects ootprint. n

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w issue 15


18/24

kWH Pipe is carrying out a turnkey pipe contract or an

open pit mine being reopened in Leveniemi northern

Sweden. Te contract includes the detailed design ma-terial deliveries welding and installation works works in

water and pressure tests and commissioning o the pipes.

Around seven kilometres o pipe will be delivered to the pit in total.

Swedish mining company LKAB is to reopen an open pit

closed as unproitable in 1983 situated in Svappavaara near Ki-

runa. Since the price o iron ore has remained high in recent

years the company has decided to increase its production capacity

by taking the Leveniemi open pit back into production.

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Te 90-metre-deep open pit has stood ooded or almost three deca-

des. Te pit holds around 30 million cubic metres o water which

the mining company intends to pump to a nearby river throughKWHs pipes. According to LKABs calculations draining the pit

will take 18 months.

Ater a nine-month installation phase the piping was ready or

operation and pumping could begin.

Te star attraction o the project is the 1.2 kilometres or so o long

oating pipes. o begin with the pipes oat on the surace as the wa-

ter drains but eventually settle along the deepest part o the truck

route as the water level drops. Te oating pipes are anchored in place

by around orty concrete weights positioned along the pit bottom

explains Christian Vestman o KWH Pipe.

Due to the demanding nature o the installation KWH Pipe was the

only contractor able to present a preliminary plan or the project.n

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18 w issue 15


19/24

i

n the northernmost part o Norway

winter temperatures can go as low as -50

degrees Celsius and the mountainous

terrain makes the long distances even

more challenging. But this oil-rich

country located at the very top o Eu-rope is now investing EUR 65 million in an

inrastructure project to modernize the oldest

road between the regions o East and West

Finnmark and to make it possible to cross

Ifordfell mountain the whole year round.

Te road crosses several rivers and streams

and the contractor needed large culverts that

will stand the test o time but also enable the

crew to quickly complete the installation. Te

summer in the ar north is short and during

winter construction work is impossible. For

this reason most o the 70 people involved

in the road construction spent 14 days work-ing long hours ollowed by 14 days o. North

o the Arctic Circle the sun never sets dur-

ing the summer which also made it possible

to use night shits rom Monday to Saturday.

Utilizing the time eciently was a priority

so Weholite with its ast installation was a

natural t or this project.

W b

Weholite structured-wall pipes have been uti-

lized in many countries or culvert applications

using both normal installation methods and in

sliplining damaged metal or concrete culverts.

It is lightweight and easy to handle does not

corrode and withstands heavy trac loads

thanks to its exibility. Pipe lengths up to 22

metres and a unique threaded joint acilitateits easy installation. KWH Pipes partner Geo-

syntia has a great deal o experience delivering

many types o products or road projects and

has introduced Weholite to Norwegian road

builders. Managing Director erje Ottesen

says: Customers generally dont nd talking

about culverts is very interesting but as we

present the benets o Weholite they usually

get excited once they realize that we can help

them lower liecycle costs and drastically

shorten the installation time. Frankly most

o them didnt even know that polyethylene

pipes o this size existed!

sz

In this particular project size did matter. Te

44-metre-long road culvert needed or the

river o Vestre Guttojohka had an internal

diameter o 3.5 metres which most likely is

a European record or plastic road culverts.

Additionally DN/ID 3 metre culverts and

several smaller sizes were delivered. On the

bottom o the culverts a thick layer o rocks

and pebbles slows down the water and makes

it easier or sh to make their way through

the pipe. Sales Manager Robert Osvaldsen at

Geosyntia describes the project as ground-

breaking and very successul despite the chal-

lenges involved in transporting pipes o that

size. Te largest pipes were delivered by boatand loaded onto trucks. As they were our

metres wide local law requires the truck to

have a police escort in addition to the regular

wide load escort cars.

So did everything go as planned? Well

everything ran smoothly except or when the

pipes were temporarily stored in the harbour.

Tey were not anchored properly and strong

winds set one pipe in motion rolling several

hundreds o metres beore ending up in the

sea. But this only proved Weholites durability

as the pipe survived the ordeal almost with-

out a scratch Osvaldsen laughs. n

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pipe world ISSUE 15


20/24

TeXT

ewkruPHOTOS

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poland has a long tradition o

hydropower. During the interwar

period the country boasted ap-

proximately 6500 operating hy-

droelectric acilities though to-

day ater decades o historical and political

turmoil only a ew hundred o them still

remain. As a result Poland uses only 15%

o its hydroelectric potential estimated at

13.7 Wh which accounts or only 2% o

the countrys overall energy production.Fortunately there have been many positive

changes in this respect in recent years. Po-

lands membership in the EU means that

the country has to comply with specic re-

quirements concerning the use o renewable

energy resources. Te EU-imposed target o

a 15% share o renewables-generated elec-

tricity in total electrical production by 2020

has injected the Polish energy sector with

a new impulse or change. Tis has been ac-

companied by an ongoing and impassioned

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debate on the countrys energy security and

the need to diversiy energy resources. An-

other new development has been the shit in

the mentality o the Polish people who are

increasingly alert to environmental issues

including the problem o excessive carbon

dioxide emissions related to burning ossil

uels or energy production. Last but not

least the simple act is that producing elec-

tricity rom water is a highly protable busi-

ness. It is thereore natural that the construc-tion o micro- and small hydroelectric power

plants has become something o a hot topic in

Poland. As a result a number o companies

have emerged that specialize in small hydro-

electric projects including MEW S.A. which

has invested in the Cieszyn power plant.

n

Te investment project worth an estimated

1.2 million euros included the construction

o a small hydropower plant with a capacity o

Te Cieszyn installation was exceptional

due to the plants location in the park con-

rms Maciej Nadulski MEWs Director or

Investments.

We had to prove that the plant would not

be overly visible and that it would be inte-

grated with the existing landscape hencethe decision to hide both the pipeline and the

powerhouse in the ground.

MEW S.A. also appreciated other benets

o the projected pipeline such as minimum

maintenance costs no adverse eect on the

environment and better energy eciency com-

pared to an open canal.

pe-hd ,

Te investor careully considered the choice

o material or the pipeline. he technical

design listed GRP pipes as the material o

choice; however MEW S.A.s nal decision

was to use DN/ID 2200 mm Weholite PE-HD

piping. Te decision was based on the high

quality o Weholite technology the exible

terms o service oered by KWH Pipe and

the companys extensive global experience

in hydroelectric projects. Te Cieszyn power

plant is the rst hydropower installation in

Poland to boast a Weholite pipeline; however

elsewhere in the world Weholite has been

used or hydroelectric applications or years.

One example is Canada ranked in the top 5 o

global hydroelectricity producers where KWHPipe delivers piping or many similar projects.

Durable leak-proo and lightweight We-

holite pipes proved to be the ideal solution

or the challenges presented by the Cieszyn

project. Teir low weight compared to other

pipes made o traditional materials such as

steel cast iron or concrete made them easy

to transport and install in the challenging ter-

rain o the city park. Among Weholites other

qualities one should mention their resistance

to corrosion chemicals and damage caused

by dierential soil settlement. Tese prop-

erties ensure the exceptional reliability andlong-lie o an underground pipeline as well

as near zero operating costs.

MEW S.A. also greatly appreciated the

smoothness o the pipelines inner surace.

Tanks to a low roughness coecient k and

the monolithic joints o the penstock as well as

choosing to orego segment bends the energy

losses caused by water riction inside the pipe-

line are reduced to a minimum which trans-

lates into greater energy eiciency or the

power plant and greater return on investment.

hydropoWer is a Cheapand reneWaBle sourCeo energy, WhiChdoes not releaseharmul gas emissionsinto the atmosphere.

0.56 MW that took advantage o the natural

height dierences o the Olza River. ypicallya power plant pipeline or canal is introduced

at a curve in a river shortcutting the rivers

ow which results in greater water drop than

would be achievable at a weir. In Poland pipe-

lines are used at larger hydroelectric acilities

while smaller plants depend on open channels.

Te key actor or choosing a pipeline or the

Cieszyn project was the plants location in

a city park. Te city authorities demanded

that the design take into consideration and

preserve the parks unctionality and aesthetics.

pipe world ISSUE 15 2


22/24

e

Construction started in October 2010 when

trenches were made or both the powerhouse

and the pipeline. Initially a sample truckload

o pipes was delivered to the installation site

to ascertain the most suitable pipe lengths. In

the end the pipes were manuactured in 12.5

m lengths and transported rom KWH Pipe,s

production plant in Kleszczw to Cieszyn. Inall between November 2010 and September

2011 KWH Pipe delivered 42 shipments o

pipes with a total length o 510 m.

Te pipes were laid out at ground level in

50-to-100 m sections and joined by means o

extrusion welding. Te joined sections were

then lowered into the trench and welded to-

gether by the KWH Pipe service team which

was responsible or all o the welding work.

Extrusion welding allowed or a leak-proo

and monolithic pipeline and proved very well

suited to the demands o winter installation.

Weholites built-in exibility also proved ex-

tremely useul because it allowed or gentle

bending o the pipeline which made it much

easier to handle and provided a cost-eective

and time-eective alternative to using seg-

ment bends and thrust blocks.

Another great property o Weholite piping

is the option o preabricating bespoke t-

tings. Te nal section o the penstock a DN/

ID 2200 mm tee designed to divide the water

ow into two streams one or each o the two

turbines was produced at the KWH plant

and delivered to the project site with the as-

sistance o a pilot car. In May 2011 ater in-

tensive construction work the pipeline was

secured in the ground and covered with soil.Work on the powerhouse was completed in

June 2011 and in September 2011 anges or

joining the pipeline with the turbines were

delivered. Considering the time needed or

installing the turbines the technical accept-

ance procedure and the start-up the com-

mencement o commercial operation was set

or January 2012.

W cc

Hydropower is a cheap and renewable source

o energy which does not release harmul gas

emissions into the atmosphere. In contrast

to large-scale hydroelectric power stations

that change the ow o rivers and adversely

aect the environment small hydroelectric

installations continue to be perceived largely

as eco-riendly and as such are considered

the uture o hydropower. In view o Polands

growing demand or electricity and the steady

decrease in the supply o ossil uels such as

hard and brown coal which the Polish energy

sector depends upon hydropower will be a

subject o growing interest.

Te Cieszyn plants location in a city park

prompted MEW S.A. to adopt a series o ter-

rain-specic technological solutions. Durable

leak-proo and lightweight Weholite pipesproved perectly suited to the demands o the

project and allowed or a signicant savings

in time and money. As the number o small

hydroelectric installations in Poland grows

using PE-HD piping or such projects will

also become more common. Te successul

completion o the KWH Pipe pipeline or

the Cieszyn hydroelectric plant once again

conrms that product quality and know-how

combined with decades o experience is quite

simply a winning ormula. n

duraBle, leak-proo andlightWeight, Weholitepipes proVed to Be the idealsolution or the Challengespresented By the proJeCt.

pipe world ISSUE 15pipe world ISSUE 1422


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a jc c f h c c ,

- (pe-hd) W c c w

b uk c.

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the 4.2 million Yazor Brook ood

alleviation scheme involves a 1.4

km long Weholite culvert pro-vided by KWH Pipes licensee in

the UK Asset International Ltd

which has been designed to divert oodwa-

ter rom the Yazor Brook into the River Wye

to reduce ood risk in parts o Hereord.

Te scheme which is a part o wider re-

generation plans or the city is unded by

Advantage West Midlands and is being de-

livered on behal o Hereordshire Council

by Swansea-based Dawnus Construction.

Dawnus chose Weholite the UKs leading

technology in structured-wall pipe to con-

struct a bespoke lood alleviation systemor the project.

Te unique capability o the high-density

polyethylene (PE-HD) pipe is that it can be

manuactured in long lengths providing a

solution to the problem o building across the

busy A438 Brecon Road. Te construction

team was able to install a single length o

pipe across the road and complete the job

in two nights causing minimal road closure

disruption to the people o Hereord.

uk

Asset supplied 1.4 km o DN/ID 2.0 m pipes

or the scheme. Te project is the rst o itskind in the UK to use an innovative energy

dissipation chamber. Tis works to remove

energy rom the water as a means o con-

trolling the orce o the water which is then

expelled rom the pipes.

Jason Austin agent or Dawnus Cons-

truction said: Weholite was deinitely

the correct choice or this project. Te ex-

pectation was that the pipes would be in-

stalled at a rate o two per day but due to the

14 m length and the act that they are light-

er and more portable the construction team

was able to install up to our pipes a day.Tis made the project more economical in

terms o time and cost and also minimised

the inconvenience caused by the necessary

road closure.

r

v

Te scheme which was completed several

weeks ahead o schedule will help reduce the

risk o ooding or a large number o proper-

ties and businesses by diverting two-thirds o

the oodwater rom Yazor Brook saely and

in a controlled manner into the River Wye.In addition to time saving benets We-

holite was also eective in terms o mini-

mising the carbon ootprint o the project.

Te manuacturing and transportation o

the pipe was equal to 252 kg o CO2

per lin-

ear metre o pipe considerably less than an

equivalent concrete pipe which is 592.1 kg

per linear metre.

Commenting on the project Simon

Tomas Managing Director at Asset said:

We are very proud to be part o a project

as large-scale and ambitious as the Here-

ordshire regeneration scheme. Tis oodalleviation system will not only reduce the

risk o ooding in this area it will also allow

or uture developments to be built.

We are pleased that the versatility o the

Weholite solution contributed to keeping dis-

ruptions to a minimum. Helping to deliver a

UK-rst in terms o the energy dissipation

chamber urther denes us as an innovative

company that prides itsel on delivering tai-

lor-made solutions or the water industry. n

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pipe world - issue 15 fintherm

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