Pipeline Condition Assessment in SA Water

Thursday, 16 August 2012

Presentation Overview

• CCTV

• MFL

• LPR

• US

• WSAA

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Presentation Overview

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CCTV

• Closed Circuit TeleVision (CCTV) • Most common method of condition assessment used for

sewer mains

• Occasionally used on water main for internal pipe condition assessment

• Intrusive – requires access points for the CCTV vehicle – Sewer manholes – Water – Cut-ins or welded manholes

• Relatively inexpensive (

CCTV

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CCTV

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CCTV

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CCTV

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MFL

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• Magnetic Flux Leakage (MFL) • Highly detailed pipe mapping • Occasionally used on water main for condition assessment • MFL tool can be

– Attached to external pipe surface – Inserted through pipeline

• Relatively slow and expensive process.

MFL

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EXTERNAL

INTERNAL

LPR

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• Linear Polarisation Resistance (LPR) • Soil testing is an indirect, non-invasive electrochemical

technique that can cost effectively deal with entire lengths of mains, without disrupting the operation of the mains.

• Some say LPR analysis is able to predict the performance of sections of mains in combination with Envirostat and PipeFail algorithms as well as identify the condition of individual pipe lengths.

LPR

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Source: WSAA R&D program Project PPS4 - REVIEW OF LINEAR POLARISATION RESISTANCE (LPR) METHODOLOGY FOR THE CONDITION ASSESSMENT OF BURIED FERROUS PRESSURE PIPELINES

US

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• UltraSonic wall thickness (US) • Direct measurement of wall thickness from external pipe

surface

• NDT, rapid, easy to use technique • Good for steel, not so good for cast • Equipment is relatively inexpensive

US

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WSAA

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• Water Services Association of Australia (WSAA) • Collaborative projects since 2007 on pipeline condition

assessment

• Practical research deliverables – software, guidelines, etc • Networking & knowledge sharing • Ensuring SA Water remains aware of best practices used in

industry

Thank You

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KANE SCOTT

Asset Manager Water Networks

SA Water

T 08 7424 1907

F 08 7003 1907

M 0417 859 715

www.sawater.com.au

250 Victoria Square, Adelaide SA 5000

GPO Box 1751, Adelaide SA 5001

http://www.sawater.com.au/�

Pipeline Condition Assessment in SA WaterPresentation OverviewPresentation OverviewCCTVCCTVCCTVCCTVCCTVMFLMFLLPRLPRUSUSWSAAThank You