Due to the varying age of water systems, piping is constructed from a wide variety of materials, from cast iron to cement mortar lined steel pipe through to asbestos cement piping, reinforced concrete piping and plastic piping.
In addition, piping is both above and below ground. Piping can be located under critical infrastructure, such as roads, or in basements.
The consequences from pipeline leaks may be high due to interruption of supply and disruption to both the public and business users. Collateral damage, from flooding, is sometimes a major issue.
Using Risk Based Inspection for Water Piping
When leaks occur, an initial reaction can be to implement a 100% inspection program of similar piping to ensure the condition of piping is fully understood. This however can be very costly due to:
- Obtaining access to items for inspection.
- The overall length of piping to be inspected is large.
ALS Industrial has been working with our clients to implement Risk Based Inspection protocols on critical water assets.
The benefits of this approach are:
- Inspection plans are created that target the expected damage mechanisms e.g. lining failure and consequent corrosion.
- Inspection methodology, with an appropriate likelihood of detection (LOD), is chosen.
- Over-inspection and under-inspection is avoided. The extent and frequency of inspection is matched to the risk and the damage mechanism. Inspection “value-for-money” is maximized.
- A living RBI Manual is created for the asset. This document is updated, or evergreened, each time new inspection data is gathered, ensuring the inspection plans are always appropriate to the condition of the asset.
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ALS has a dedicated engineering team to provide Risk Based Inspection investigation assessments and consulting services across Australia.