What data defines a ceramic-lining shutdown scope?

List the assets, faces and zones included, the work explicitly excluded and the condition that would trigger a scope change. Identify whether the task is full replacement, local repair, trial installation or inspection with provisional repair. Give every item a drawing, photograph or equipment reference that crews can recognize in the field. A phrase such as ‘reline the chute’ is too broad when impact zones, sliding walls, transitions and access panels may require different constructions and quantities.

Provide wide and close photographs, material direction, failed edges, missing pieces, remaining thickness where measured and the date of each observation. Record the current lining construction and known installation history. Separate direct observations from suspected causes and unknowns. A replacement drawing should show the mapped first-impact, sliding, erosion and transition zones rather than copying the previous layout without review. Removed pieces and pre-cleaning photographs can preserve evidence that otherwise disappears at the start of the shutdown.

Issue dimensions, tolerances, curvature, openings, transitions and support details from a controlled drawing, and mark which values remain site measurements. Add handled material, particle range, throughput or velocity, drop geometry, temperature, moisture or chemistry, pressure where relevant and upset conditions. Quantity take-offs should state joint allowance, cutting allowance and contingency basis. If access prevents measurement before shutdown, identify the hold point at which dimensions will be confirmed and who can release fabrication or field adjustment.

Define removal method and limits, steel inspection, repair authority, surface-preparation requirement, cleanliness verification and the response to unexpected corrosion or distortion. Confirm isolation, confined-space controls, scaffolding, lifting, lighting, ventilation, waste handling and environmental conditions for bonding or curing. Identify interfaces between operations, mechanical repair, lining crew, inspection and restart. The scope should not assume that sound steel, dry surfaces or sufficient access will appear after removal; each assumption needs a verification step and decision owner.

The work pack should identify the exact ceramic construction, batch or product traceability, adhesive or mechanical retention, mixing and application requirements, joint layout, edge and transition details, cure conditions and field restrictions. Establish hold points after removal, after substrate repair and preparation, during first installation, and before close-up or restart. Record who witnesses and who accepts each step. Manufacturer data and the approved procedure govern product-specific limits; generic statements about temperature or chemical resistance are not substitutes.

Define visual, dimensional and workmanship acceptance criteria before installation. The close-out file should contain approved drawings, material records, surface and environmental readings, hold-point releases, photographs of hidden stages, deviations, repairs, as-built layout and an inspection baseline. Use a simple change register for discovered steel damage, revised quantities or altered geometry, including effect on time and restart risk. A shutdown is not complete when the last tile is installed; it is complete when the asset can be operated and inspected against a traceable baseline.