Verify materials and component traceability
Link the installed contact path to applicable material evidence.
1.9 minutes · English captions · Illustrations and worked example
This lesson’s core explanations and worked-example reasoning are narrated. The table restates the example for reference; the practice activity and model answer are reading exercises.
English captions available.
Narration and visual explanations
Open View Technical Explanation to see each diagram, its text description and the matching narration. Standard abbreviations and numerals are used visually.
Map the contact components
View Technical Explanation · Diagram 1
Lesson explanation
Follow the product-contact path through the fictional vessel. Include the agitator, gaskets, valve seats and transfer connection, not only the metal shell. The installation check asks whether the specified materials are actually represented by the installed components and their evidence. A certificate for the vessel body does not identify an elastomer fitted later.
Connect item to certificate
View Technical Explanation · Diagram 2
Lesson explanation
A certificate says material grade X, but which installed item does it describe? Use the applicable identifiers and controlled supplier traceability to link the record to the component. The precise method depends on the component and project. Do not require one universal certificate format or assume every gasket has a readable individual serial number. Evaluate the traceability actually available.
Treat missing links as gaps
View Technical Explanation · Diagram 3
Lesson explanation
In our example, the vessel certificate is available but the installed gasket lot cannot be linked to its material record. Keep the gasket finding open. The vessel certificate does not fill that gap. Obtain applicable traceability, or use an authorized corrective approach followed by verification. Changing a label without evidence would only conceal the uncertainty.
Keep suitability and identity separate
View Technical Explanation · Diagram 4
Lesson explanation
Material identity and material suitability are related but different questions. The design review should have considered intended exposure, while installation evidence identifies what was fitted. If an authorized substitution changes the material, assess the compatibility and qualification implications through change control. Do not declare cleaning effectiveness solely because the installed material matches a certificate.
Worked example
| Component | Evidence status |
|---|---|
| Vessel body | Applicable certificate linked to vessel |
| Gasket | Lot-to-material link missing; unresolved |
| Outlet valve | Part identifier linked to accepted specification |
Apply it · Activity 4
Build a three-row contact-material register and describe how to handle a missing gasket traceability link.
Open workbook activityCompare with model reasoning
Include body, gasket and outlet component; record specification, installed identifier, evidence reference and status. Keep the gasket unresolved, obtain applicable evidence or authorized correction, and reassess any material change.