leak detection management

Leak Detection ManagementLeak Detection ManagementLeak Detection ManagementLeak Detection Management

Central NRWNovember 18, 2010

What We Will Cover TodayWhat We Will Cover Today

• Maynilad Situation in 2007• Building of Leak Detection Teamsg• Understanding Leakage• Finding Leaks• Finding Leaks• Leak Volume : A function of Time and Flow

RateRate• Leak Detection Activities• Operational Strategy• Searching for Leaks in Large MainsSearching for Leaks in Large Mains• Continuous improvement (JD7)

Maynilad Situation in 2007Maynilad Situation in 2007

• NRW Level at 67%, 1500 MLD water loss• Water Balance: 70% Physical Lossesy

30% Commercial Losses• No NRW Management Program• No NRW Management Program• No dedicated leak detection team• Deteriorated and leaking network• Poor operation and maintenance• High cost of repairs, oftentimes, the solution

is massive pipe replacementis massive pipe replacement

Leak Detection ManagementLeak Detection ManagementLeak Detection ManagementLeak Detection Management

In 2008, the LDM was created under Central ,NRW Division to localize, locate and pinpoint leaks to address the high physical p p g p ylosses of Maynilad

Building-up of L k D t ti T

Building-up of L k D t ti TLeak Detection TeamsLeak Detection Teams

• Hired new and young engineers• Trained with foreign expertsg p• Upgraded equipment• New office environment• New office environment• Acquired new service vehicles• Full management support

Leak Detection TeamLeak Detection TeamFully equipped with leak detectionwith leak detection equipment, tools, safety gadgets, & y g g ,service vehicle

22 Teams going22 Teams, going 30 within the year

Training with Foreign ExpertsTraining with Foreign ExpertsTraining with Foreign ExpertsTraining with Foreign Experts

From classroom lecture to actual field training

Training the TrainersTraining the TrainersTraining the TrainersTraining the Trainers

• Creation of trainers amongst Maynilad staff• 4 Level Leak Detection Training Programs

Replacing Old EquipmentReplacing Old EquipmentReplacing Old EquipmentReplacing Old Equipment

Old equipment acquired during MWSS time

Acquiring New EquipmentAcquiring New EquipmentAcquiring New EquipmentAcquiring New Equipment

Modern equipment with latest technologytechnology

New OfficeNew OfficeNew OfficeNew Office

The LDM HQ is strategically locatedat Arroceros Manilaat Arroceros, Manila

New Service VehiclesNew Service VehiclesNew Service VehiclesNew Service Vehicles

Complete with early warning device

What’s Next?What’s Next?What s Next?What s Next?

1. Train-the-Trainers Program for Global Competitivenessp

2. Continuing research and upgrade of g pgequipment for Global Competitiveness

Understanding Leakage Physical losses nearly

Understanding Leakage Physical losses nearly

always the largest part of NRWNRW

Most leaks do not surface Leak detection requires aLeak detection requires a

lot of experience and understanding

Repairing leaks immediately minimize water losses

Maynilad struggles to repair the large number of leaks d t t d thdetected every month

15

Finding Leaks Average Leak Finder: ALF

Finding Leaks Average Leak Finder: ALF How does he find leaks? By detecting leak noises and pinpointing their location

By using other sophisticated equipment

He needs the rightHe needs the right equipment, training and commitment!commitment!

16

Leak Volume: A function of Time and Flow Rate

ay)

Leak Duration

e(m

3/da

A L R

Flow

Rat

eF

Time

Leak Volume = Time (A+L+R) x Flow RateLeak Volume = Time (A+L+R) x Flow RateA: Awareness; L: Localization; R: Repair

17

Time Makes Difference75

Time Makes Difference

m3

/ day reported mains

burst75 m3

1 Day

75 m

y 14 Dreported service connection burst

m3

/ day 14 Days connection burst

350 m325

RLA

ay

undetected serviceconnection burst365 Days

Lm3

/ d >9,000 m325365 Days

RA

18

Leak Detection ActivitiesLeak Detection ActivitiesLeak Detection ActivitiesLeak Detection Activities

• Leak localization using acoustic noise logging (alternative to step-testing)

• Leak correlation to locate the region of potential leak

• Pinpointing the exact location of the leak prior to excavationprior to excavation

• Blanket sounding survey – area saturation using listening sticksusing listening sticks

• Boundary valve verificationS S f• Sahara System for primary leak detection

Acoustic Noise LoggingAcoustic Noise Logging

D O N S U L

AC

100A

C

1 5 0 C I

0CI

1 5 0 C I

100 C I

100C

I

HICA

N

AMOR

TES

DAMP

OL

ALAN

100C

I

1 5 0 C I

150A

150C

I

150

1 5 0 C I

C

DALA

H

DAET

DAM

DANC

A

DADIA

1 5 0 P V C

150

150A

C

I

150C

I

1 5 0 C I

150C

I

150A

C

M AR

DAYN

E

IANGAS

DARA

GA

NALU

PIHA

N

1 0 0 C I

1 5 0 A C

0AC

150C

150AC

200A C

150CI

150CI

0 C I

15

100AC

150AC

150AC

150AC

150AC

1 5 0 A C

150AC

100A

C

2 0 0 A C

O

D A M A R L O O P

D A M AR

D A S M A R IN A S

DIN CI

1 50 C I

32GI

2 0 0 A C

100AC

200A C 1 0 0 C I50AC

2 5 0 A C

2 0 0 A C

2 0 0 A

2 00 A C

2 5 0 A C

250A

DORA

DO

S G T . E . R IV E R A

2 5 0 C I1 5 0 P V C

2 5 0 C I

0AC

Acoustic Noise LoggingAcoustic Noise Logging

00A

C

1 00 C I

D O N S U L

100C

I

1 5 0 C I

150A

C

100

1 5 0 C I

150C

I

150C

I

1 5 0 C I

0 C I

100C

I

DALA

HICA

N

ET

DAMO

RTES

DAMP

OL

DANC

ALAN

1 5 0 P V C

150A

C

C I

150C

I150C

I

1 5 0 C I

150A

C

DAE

DADIANGAS

A

150AC

150CI

150CI

100AC

1 5 0 C I

150

150A

D A M AR

DAYN

E

A S M A R IN A S

DARA

GA

DINA

LUPI

HAN

1 0 0 C I

1 5 0 A C

150CI

1 50 C I

2 0 0 A C

150AC

100AC

2 00A C

200A C 1 0 0 C I

150AC

150AC

0AC

150AC

150AC

1 5 0 A C

0AC

2 0 0 A C

100A

C

2 0 0 A C

2 00 A C

DORA

DO

D A M A R L O O PD A S M A R IN

32GI

1 5 0 P V C

2 5 0 A C

2 0 0

2 5 0 A C

250AC


2 5 0 C I1 5 0

2 5 0 C I

Leak CorrelationLeak Correlation

100A

C

1 00 C I

Leak CorrelationCorrelation and

D O N S U L

100C

I

1 5 0 C I

150A

C

1 5 0 C I

150C

I

150C

I

1 5 0 C I

1 5 0 C I

100C

ICorrelation and pinpointing is the last method in leak detection by detecting the hard-to-find leaks.

DALA

HICA

N

DAET

DAMO

RTES

DAMP

OL

DANC

ALAN

1 5 0 P V C

150A

C

150C

I150C

I

5 0 C I

150A

C

DA

DADIANGAS

AGA

150AC

150CI

150CI

100AC

1 5 0 C I

150AC

150AC

D A M A R L O O P

D A M AR

DAYN

E

D A S M A R IN A S

DARA

G

DINA

LUPI

HAN

1 0 0 C I

1 5 0 A C

150CI

1 50 C I

2 0 0 A C

150AC

100AC

2 00A C

200A C 1 0 0 C I

150AC

150AC

C

150AC

150AC

1 5 0 A C

C

2 0 0 A C

100A

C

2 0 0 A C

2 00 A C

DORA

DO

D A M A R

32GI

2 5 0 C I1 5 0 P V C

2 5 0 A C

2 5 0 A C

250AC

An example of Correlation by Aquacorr locating a strong underground leak


2 5 0 C

2 5 0 C I

underground leak.

PinpointingPinpointingPinpointingPinpointing

Operational StrategyOperational StrategyCategory Scope Indicatorg y p

DMA Priority DMAs with high NRW volume,

Lpcd and NRW Volume in MLDNRW volume, Volume in MLD

Outside Areas with high occurrence of leaks and illegal High NRW

DMAg

connections(Blanket Sounding Survey)

gVolume

Primary Li

• 350 mm and above Primary Network

W t dit d tHigh NRW

V lLines • Water audited segments with high NRW volume

Volume

Blanket Sounding SurveyBlanket Sounding Survey

No78No 70

Bill St

28 2624

31

322335

33

3427

No 75 No 2625

2335

393133

34

Area of Interest

Hydrant

Pipe No 104

37

Interest

Meter

pNetwork33

3029

1. Find Every Fitting

2. Take a reading

No 20

No 105g

3. Determine area of interest

4. Locate pipes

Searching Leaks in Large Mains

29

Before & AfterBefore & After

Leak Found by SaharaLeak Found by SaharaAl i /Al i /LL LLAlgeciras/Algeciras/LaonLaon LaanLaan

BEFORE EXCAVATION & REPAIR DURING EXCAVATION & REPAIRBEFORE EXCAVATION & REPAIR DURING EXCAVATION & REPAIR

JD7 – LDS1000

LDS1000 ‐ is a long distance trunk main CCTV and leak detection system designed for internal investigation work.

Assess inside pipe conditions while the line is in service p p

JD7 UK b d hi h id i d i d l tJD7 – UK based company which provides unique design, developmentAnd implementation solutions for industrial, nuclear, aerospace andprocess plants.

JD7 – LDS1000 versus Sahara

JD7 – LDS1000 Sahara• 1000m of cable length• CCTV and leak detection are

• 1850m of cable length• CCTV and leak detection are

done on one insertion only• Inspect pipeline 300mm &

done on separate insertion• Inspect pipeline 400mm &

above• Lesser pullback pressure

above• Experience critical pullback

(not using drogue), meaning more distance to cover

pressure (due to drogue), meaning short distance to covercover

JD7 – LDS1000

JD7 – LDS1000

Illustration 1 Probe with CCTV, Hydrophone & Sonde

Illustration 2Electronic Cable Drum

Illustration 3Live & internal images from video andgacoustic sensor

JD7 – LDS1000

Leakage Results

Clear PeakOver Leak Site

Future Training FacilityFuture Training Facilityg yg y

Leak Detection TipLeak Detection Tippp

% kill90% skills,10% eq ipment10% equipment

O i i i t d tO i i i t d tOur vision is to produce topOur vision is to produce top--notch leak detection personnel notch leak detection personnel

ti t th i ti t th i as we continue strengthening as we continue strengthening our program and someday we our program and someday we

b bl t t b bl t t may be able to export may be able to export Maynilad’sMaynilad’s leak detection leak detection

i t id i t id services outside. services outside.

Thank You

leak detection management

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