Application Guides
A gasifier shutdown creates a limited opportunity to preserve as-found evidence before cleaning changes the surface. This workflow organizes inspection by equipment zone, distinguishes deposits from possible corrosion or erosion, and records what requires closer testing or engineering review. It does not assert that a DAYU-X product was used on the inspected equipment.
Confirm isolation, safe access and the exact internal surfaces covered by the inspection plan. Divide the gasifier into traceable elevations, orientations and transition zones so findings can be returned to after cleaning or repair.
Capture overview patterns before deposits are disturbed. Record colour, distribution, apparent thickness variation, flow direction, detached material and relationships to geometry without assuming chemical composition from appearance.
Use morphology and location to establish investigation categories rather than declaring a mechanism from one photograph. Deposits can cover wall loss; cleaning can create marks; and an earlier repair can interrupt an otherwise repeated pattern.
Map accumulations, clean tracks, directional marks and shielded regions in relation to gas or particle movement. Note where sampling or operating information is needed before a mechanism can be evaluated.
Record pitting, scale disruption, directional loss, polished areas and local attack as observations. Where mechanisms may interact, keep the categories open until measurements and relevant technical review are complete.
Pay particular attention to weld transitions, membrane connections, openings, attachments, repaired areas and changes in gas-path exposure. Compare equivalent zones where possible to distinguish a repeated operating pattern from an isolated defect.
Return to the same location references and document the cleaned condition. Link as-found and cleaned images so hidden surface damage, cleaning effects and retained deposits are not confused in the final assessment.
Define which zones can proceed to preparation, which require measurement or sampling, and which remain outside coating work. Cracks, bulging, leakage, structural wall loss or ambiguous widespread damage require the appropriate engineering review.
Visual evidence supports location and condition mapping, but it does not determine material chemistry, corrosion rate, remaining structural capacity, future service life or product suitability. Keep those conclusions separate and evidence-led.
Compare a different equipment-level mechanism investigation without merging the workflows.
Review the limits of test evidence for cyclic hot service.
Create a traceable record only after a defined trial is authorized.
Technical review
Project takeaway
Send the operating condition and the document or application question you need reviewed.
