A steel structure TPI report review checklist helps EPC buyers verify whether a third-party inspection report is complete enough to support shipment release. A report may look formal, but it can still miss key evidence, unclear inspection scope, unresolved comments, or release conditions that create risk after the steel is packed or shipped.
This checklist is for procurement, quality, and project control teams that receive TPI reports for steel structure fabrication, welding, coating, galvanizing, packing, loading, or pre-shipment inspection.
1. Confirm report identity and inspection scope
Start with the report basics. The TPI report should clearly identify the inspection company, inspector, report number, inspection date, supplier, project name, purchase order, inspected package, drawing revision, specification reference, and inspection stage.
Scope matters because a report can cover only a sample of components or only one inspection stage. Do not treat a packing inspection report as evidence that welding, coating, or dimensional inspection was accepted unless those checks are clearly included.
2. Check inspected quantity and sampling basis
The report should state what was inspected and how the sample was selected. For steel structure packages, this may include member marks, bundle numbers, shipment batch, total quantity, inspected quantity, rejected quantity, and any items not available during inspection.
If sampling was used, the report should explain the sampling basis or reference the inspection test plan. A vague phrase such as "random inspection done" is not enough when the buyer needs release confidence for a large batch.
3. Review acceptance criteria and standards
The report should show which drawing, specification, standard, or approved procedure was used for acceptance. This is important for weld inspection, dimensions, coating thickness, galvanizing appearance, packing method, marking, and document review.
If the report lists defects but does not state acceptance criteria, the buyer may not be able to decide whether the finding is minor, major, acceptable by concession, or a shipment blocker.
4. Check evidence attachments
A strong TPI report includes evidence that matches the inspection scope. Attachments may include photos, measurement sheets, DFT readings, NDT reports, material certificate references, packing list checks, label photos, loading photos, and signed inspection forms.
| Evidence type | Review question |
|---|---|
| Photos | Are component marks, batch, and before/after conditions visible? |
| Measurements | Do records show criteria, actual result, and acceptance status? |
| Coating data | Are DFT readings linked to inspected areas or components? |
| Documents | Are certificates and records matched to the inspected batch? |
5. Identify open comments and unresolved findings
Every open comment should be visible in the report or in an attached comment register. The buyer should check comment number, issue description, affected item, supplier response, required evidence, responsible party, due date, and closeout status.
If comments are not closed, the report should say whether the shipment is held, conditionally released, or allowed to proceed with follow-up action. Related resource: steel structure inspection comment closeout checklist.
6. Review repair and re-inspection records
When the report includes defects that were repaired, check whether the re-inspection evidence is included. A TPI report should not only record the original defect. It should also show repair method, repair evidence, re-inspection result, final acceptance, and any remaining condition.
For weld repair, coating repair, marking correction, or packing correction, the closeout evidence should be traceable to the same item that was originally rejected or commented.
7. Confirm release status
The final release status should be clear. Typical statuses are accepted, accepted with comments, conditionally released, held, rejected, or pending further evidence. If the status is unclear, do not rely on the report as the only basis for shipment release.
The report should also identify who accepted the final status: third-party inspector, buyer representative, owner representative, supplier quality manager, or EPC project team.
8. Return unclear reports for correction
If the TPI report is missing scope, evidence, open comment status, or release wording, return it for correction before using it for shipment or payment approval. The correction request should list each missing item and require the revised report to keep the same report number with a revision record, or issue a clearly linked supplementary report. This avoids two different report versions circulating during shipment release.
When the supplier or inspection agency sends a revised report, check that old errors are actually corrected and that new contradictions were not introduced. For example, a report may add missing photos but still fail to identify the inspected batch, or it may change release status without showing who approved the change.
9. Use a TPI report review scorecard
A scorecard helps compare report quality between suppliers and inspection stages. It also helps the buyer explain why a report is accepted or returned for clarification.
| Review item | Suggested weight | Evidence to check |
|---|---|---|
| Report identity | 15% | Report number, project, PO, supplier, inspector, date. |
| Inspection scope | 20% | Inspected items, quantity, sampling basis, stage. |
| Acceptance basis | 15% | Drawing, specification, ITP, procedure, criteria. |
| Evidence completeness | 25% | Photos, measurements, records, certificates, signatures. |
| Open comment control | 15% | Open items, owner, due date, closeout status. |
| Release status | 10% | Accepted, conditional, held, rejected, or pending evidence. |
Warning signs
- The report does not state exactly which component marks or batches were inspected.
- Photos are not labeled or cannot be matched to the inspected package.
- Open comments are mentioned but not listed with responsible owner and due date.
- The report says "accepted" while defects or missing records remain unresolved.
- Repair evidence is attached but no re-inspection result is shown.
- The report lacks a clear release status before shipment loading.
Buyer note
A TPI report should support a decision, not just record that an inspection occurred. Before using the report for shipment release, check whether it proves the inspected scope, documents the findings, closes or tracks comments, and states the final release condition clearly.