Can pipework and vessel wall thickness inspection move from a fixed interval to a condition-based check?

Partly: part of the task converts to a condition and part stays on the calendar. The measurement converts to a rate-based interval; where the pipework is part of a registered pressure system the written scheme still sets a maximum interval.

What condition would trigger pipework and vessel wall thickness inspection instead of the calendar?

Wall thickness approaching the minimum allowable by the corrosion rate calculated from the last two readings, or a corrosion probe showing the rate rising

What reading proves pipework and vessel wall thickness inspection was done?

Wall thickness at marked points (mm), corrosion rate (mm per year), probe reading. Observed by: Ultrasonic thickness gauge at marked points; permanently installed thickness sensors or corrosion probes on critical lines.

What evidence does pipework and vessel wall thickness inspection produce for an ISO 55001 or ISO 45001 audit?

Thickness record per point with the minimum allowable, the rate and the next inspection date derived from the rate

Every task type · Fluid systems

Pipework and vessel wall thickness inspection

Corrosion is a rate and the next inspection date should come from it. A fixed interval is either too soon for most lines or too late for the one that matters.

partly

part of the task converts to a condition and part stays on the calendar

Ultrasonic thickness gauge at marked points; permanently installed thickness sensors or corrosion probes on critical lines

how the condition is observed

Fluid systems

asset class

Condition that replaces the interval: Wall thickness approaching the minimum allowable by the corrosion rate calculated from the last two readings, or a corrosion probe showing the rate rising
Reading that proves it: Wall thickness at marked points (mm), corrosion rate (mm per year), probe reading
Why the interval stays: The measurement converts to a rate-based interval; where the pipework is part of a registered pressure system the written scheme still sets a maximum interval.
Evidence an auditor accepts: Thickness record per point with the minimum allowable, the rate and the next inspection date derived from the rate
First move: Mark and photograph every measurement point; a reading from a slightly different spot is a different number.

What it is evidence for

Clause references from a human-verified corpus licensed to Maintenance Log Converter. A clause marked reference is named, not reproduced.

Calendar tasks a monitored condition could replace ISO 55001:2014 9.1 · ISO 55001:2014 8.1 · ISO 55001:2014 6.2.2 · ISO 55001:2014 8.2 · ISO 55001:2014 10.3 · ISO 45001:2018 8.1.3

ISO 55001:2014 9.1 Monitoring, measurement, analysis and evaluation

The organization determines what needs to be monitored and measured, the methods for monitoring, measurement, analysis and evaluation to ensure valid results, when monitoring and measuring is performed, and when results are analysed and evaluated. It evaluates and reports on asset performance, asset management performa...

Evidence an auditor accepts: Performance measurement framework covering asset, asset management and system performance; Condition, reliability and cost data with defined collection methods; Periodic performance reports (financial and non-financial)

ISO 55001:2014 8.1 Operational planning and control

The organization plans, implements and controls the processes needed to meet requirements and to implement the actions determined in planning, including the actions to address risks and opportunities and the asset management plans. It establishes criteria for the processes, implements control in accordance with the cri...

Evidence an auditor accepts: Procedures and work instructions for life-cycle activities (acquire, operate, maintain, renew, dispose); Process criteria and performance measures; Work records demonstrating activities carried out as planned

ISO 55001:2014 6.2.2 Planning to achieve asset management objectives

The organization integrates the planning to achieve asset management objectives with other organizational planning, including financial, human resources and other support functions. It establishes, documents and maintains asset management plans that define the decision-making method and criteria, the processes and meth...

Evidence an auditor accepts: Asset management plans per asset class or system with activities, resources, owners and dates; Documented decision-making method and criteria for prioritising activities; Life-cycle cost or whole-of-life models supporting the plans

ISO 55001:2014 8.2 Management of change

Risks associated with any planned change, permanent or temporary, that can have an impact on achieving the asset management objectives are assessed before the change is implemented, and the organization ensures such risks are managed in accordance with 6.1 and 6.2.2. The organization controls planned changes and review...

Evidence an auditor accepts: Change management procedure covering assets, processes, organization and suppliers; Change risk assessments prior to implementation; Post-implementation reviews of unintended consequences

ISO 55001:2014 10.3 Continual improvement

The organization continually improves the suitability, adequacy and effectiveness of its asset management and its asset management system.

Evidence an auditor accepts: Improvement register with sources (audits, reviews, performance analysis, incidents); Evidence of improvements implemented and their measured effect; Trend of performance measures over time

ISO 45001:2018 8.1.3 Management of change

The organization establishes processes for the implementation and control of planned temporary and permanent changes that impact OH&S performance, including new products, services and processes or changes to existing ones (workplace locations and surroundings, work organization, working conditions, equipment, workforce...

Evidence an auditor accepts: Management of change procedure covering all listed change types; Change risk assessments before implementation; Records of unintended changes reviewed and mitigated

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