Pipeline Condition Assessment - Trenchless Asia
of 6
/6
Embed Size (px)
Transcript of Pipeline Condition Assessment - Trenchless Asia
Microsoft PowerPoint - TA2018 Peter Henley
WRcwrc-infrastructure.co.ukwrc-infrastructure.co.uk
Strategy
InspectionInspectionInspectionInspection
5/16/2018
2
pipe at that location
wrcplc.co.uk 6independent | trusted | innovative
• Small and medium leaks are hard to find with external tools
• Inline technologies bring the sensor to the leak
• Both type of inspection can offer Pipe Wall Assessment (PWA) in
live mains
Tethered Inspection - Sahara
Detailed Pipeline Assessment Results Condition Assessment Gravity Sewers
CCTV Inspection
• Well established technique for assessing the condition of sewerWell established technique for assessing the condition of sewerWell established technique for assessing the condition of sewerWell established technique for assessing the condition of sewer
• Depends on the skill of the surveyor for accuracy Depends on the skill of the surveyor for accuracy Depends on the skill of the surveyor for accuracy Depends on the skill of the surveyor for accuracy
5/16/2018
4
Gravity Sewers - Electro Scan
• Identifies infiltration sources that CCTV doesn’t seeIdentifies infiltration sources that CCTV doesn’t seeIdentifies infiltration sources that CCTV doesn’t seeIdentifies infiltration sources that CCTV doesn’t see
• Quantifies the amount of infiltrationQuantifies the amount of infiltrationQuantifies the amount of infiltrationQuantifies the amount of infiltration
• Allowing rehabilitation to be better targetedAllowing rehabilitation to be better targetedAllowing rehabilitation to be better targetedAllowing rehabilitation to be better targeted
Page 14
wrcplc.co.uk 15independent | trusted | innovative
Case Study – Southern Water
Romsey Rising Main - SmartBall Survey 1. Provided operational confidence in the technology
2. Confirmed the outputs available from the technology
3. Understand the context in which the results would form part of the capital
maintenance targeting process and decision tree - Capital Maintenance
Efficiency Strategy
• 3 vertical blanked Ts discovered
– during planning
• No significant deviation between the recorded pipeline route and that
detected using SmartBall
Condition Assessment Results –
Leak location using in-pipe survey Leak type Suggested action
Small leak, cast/spun iron joint Stable Monitor through regular data review
Large leak, cast/spun iron joint Stable Plan in repair at time of lower reactive maintenance
Leak on cast/spun iron pipe barrel Critical Urgent repair
Small leak, ductile iron or steel Unstable Frequent monitoring through data review. Consider regular
in-pipe surveys
Multiple leaks observed in
which may benefit from rehabilitation rather than repair
wrcplc.co.uk 19independent | trusted | innovative
Survey Decision Tree - Examples
What do we need to know? How do you find that out? What did we find out?
How much of a 15km pipeline needs
replacement?
inspection device on 30" pipeline
Only one pipe length requiring intervention
0.04% of total length.
sewer before nearby construction
project starts?
Laser/sonar profile and deep tracing Mapped position of localised damage to
brickwork and informed construction company of
exact route of 150m sewer
How much of a 2.8km 800mm steel
pipeline is corroded, and requires
intervention?
required
corrosion. 2%
up by correlation?
How much of a 10km 400mm rising
main requires replacement?
The line of the main and pipe materials were
very different from GIS. A significant length of
replacement was de-scoped as the pipe was
found to be new.
Are trunk mains leaking? Upstream loss analysis followed by targeted in-
pipe leak detection
found and repaired. 2 MLD saved.
Survey Decision Tree - Examples
What do we need to know? How do you find that out? What did we find out?
Which damaged sewer pipes are causing a
waste water pumping station to be
overwhelmed?
Electro Scan of 600m section 63 infiltrations but 80% of infiltration restricted to just 3
sections 3%
repairing 10m deep suspected leak?
Sahara deep location and acoustic
detection
What is the route cause of corrosion and
high number of historic bursts, and likely
locations requiring intervention?
Gas pockets identified and new gas relief valves installed as
well as providing new information on the route and material
of the main.
affecting treatment works?
Sonar profile scan using Sahara The location and quantification of mussels enabled planned
maintenance
Can we increase pressure on the pipeline? 6km Untethered acoustic survey Leaks found at one previous repair and 2 scour points, the
rest of the pipeline has not leaked in 40 years so pressure
was successfully increased.
1500mm PCCP pipeline?
Untethered 6km acoustic survey “The survey was an extremely worthwhile exercise that has
identified an unexpected leak. Critical trunk mains should be
subject to such inspections routinely to reduce risk to supply
and allow for the repair of pipes in a planned manner.” –
John Slattery (Senior Executive Engineer)
5/16/2018
6
wrc-infrastructure.co.ukwrc-infrastructure.co.uk
See me on JBP Stand 119 for further information
[email protected]
Strategy
InspectionInspectionInspectionInspection
5/16/2018
2
pipe at that location
wrcplc.co.uk 6independent | trusted | innovative
• Small and medium leaks are hard to find with external tools
• Inline technologies bring the sensor to the leak
• Both type of inspection can offer Pipe Wall Assessment (PWA) in
live mains
Tethered Inspection - Sahara
Detailed Pipeline Assessment Results Condition Assessment Gravity Sewers
CCTV Inspection
• Well established technique for assessing the condition of sewerWell established technique for assessing the condition of sewerWell established technique for assessing the condition of sewerWell established technique for assessing the condition of sewer
• Depends on the skill of the surveyor for accuracy Depends on the skill of the surveyor for accuracy Depends on the skill of the surveyor for accuracy Depends on the skill of the surveyor for accuracy
5/16/2018
4
Gravity Sewers - Electro Scan
• Identifies infiltration sources that CCTV doesn’t seeIdentifies infiltration sources that CCTV doesn’t seeIdentifies infiltration sources that CCTV doesn’t seeIdentifies infiltration sources that CCTV doesn’t see
• Quantifies the amount of infiltrationQuantifies the amount of infiltrationQuantifies the amount of infiltrationQuantifies the amount of infiltration
• Allowing rehabilitation to be better targetedAllowing rehabilitation to be better targetedAllowing rehabilitation to be better targetedAllowing rehabilitation to be better targeted
Page 14
wrcplc.co.uk 15independent | trusted | innovative
Case Study – Southern Water
Romsey Rising Main - SmartBall Survey 1. Provided operational confidence in the technology
2. Confirmed the outputs available from the technology
3. Understand the context in which the results would form part of the capital
maintenance targeting process and decision tree - Capital Maintenance
Efficiency Strategy
• 3 vertical blanked Ts discovered
– during planning
• No significant deviation between the recorded pipeline route and that
detected using SmartBall
Condition Assessment Results –
Leak location using in-pipe survey Leak type Suggested action
Small leak, cast/spun iron joint Stable Monitor through regular data review
Large leak, cast/spun iron joint Stable Plan in repair at time of lower reactive maintenance
Leak on cast/spun iron pipe barrel Critical Urgent repair
Small leak, ductile iron or steel Unstable Frequent monitoring through data review. Consider regular
in-pipe surveys
Multiple leaks observed in
which may benefit from rehabilitation rather than repair
wrcplc.co.uk 19independent | trusted | innovative
Survey Decision Tree - Examples
What do we need to know? How do you find that out? What did we find out?
How much of a 15km pipeline needs
replacement?
inspection device on 30" pipeline
Only one pipe length requiring intervention
0.04% of total length.
sewer before nearby construction
project starts?
Laser/sonar profile and deep tracing Mapped position of localised damage to
brickwork and informed construction company of
exact route of 150m sewer
How much of a 2.8km 800mm steel
pipeline is corroded, and requires
intervention?
required
corrosion. 2%
up by correlation?
How much of a 10km 400mm rising
main requires replacement?
The line of the main and pipe materials were
very different from GIS. A significant length of
replacement was de-scoped as the pipe was
found to be new.
Are trunk mains leaking? Upstream loss analysis followed by targeted in-
pipe leak detection
found and repaired. 2 MLD saved.
Survey Decision Tree - Examples
What do we need to know? How do you find that out? What did we find out?
Which damaged sewer pipes are causing a
waste water pumping station to be
overwhelmed?
Electro Scan of 600m section 63 infiltrations but 80% of infiltration restricted to just 3
sections 3%
repairing 10m deep suspected leak?
Sahara deep location and acoustic
detection
What is the route cause of corrosion and
high number of historic bursts, and likely
locations requiring intervention?
Gas pockets identified and new gas relief valves installed as
well as providing new information on the route and material
of the main.
affecting treatment works?
Sonar profile scan using Sahara The location and quantification of mussels enabled planned
maintenance
Can we increase pressure on the pipeline? 6km Untethered acoustic survey Leaks found at one previous repair and 2 scour points, the
rest of the pipeline has not leaked in 40 years so pressure
was successfully increased.
1500mm PCCP pipeline?
Untethered 6km acoustic survey “The survey was an extremely worthwhile exercise that has
identified an unexpected leak. Critical trunk mains should be
subject to such inspections routinely to reduce risk to supply
and allow for the repair of pipes in a planned manner.” –
John Slattery (Senior Executive Engineer)
5/16/2018
6
wrc-infrastructure.co.ukwrc-infrastructure.co.uk
See me on JBP Stand 119 for further information
[email protected]
