A Release Package That Does Not Agree With Itself

Potentially compliance-affecting:

1. Shell thickness. If the measured 0.412 in. is below the minimum required thickness for the stated design pressure, temperature, corrosion allowance, and joint efficiency, then the vessel does not support its certified rating. This is the first item to resolve: obtain the design calculation, confirm the minimum required thickness, and compare it with verified ultrasonic readings at documented locations.
2. Nameplate versus U-1A. The nameplate is what the plant reads and what determines safe operating limits. A 275 psi stamp against a 250 psi data report is a certification defect with real consequences.
3. PWHT chart. An unsigned chart with no furnace identification cannot demonstrate that the required heat treatment was performed on this vessel. Tractability, not just paperwork.
4. Radiography report versus U-1A. This one may be conservative rather than unsafe: a joint efficiency of 0.85 with spot radiography is normal. If 100 percent was truly performed, the report and data report should be reconciled and the higher efficiency could be claimed, but there is no safety deficiency as recorded. Confirm from the films which is true.

Record-keeping defects still block release, because the certified documents must be internally consistent and true.

Nothing ships and no signature is applied until each finding is closed.

• Thickness: the manufacturer's engineering group re-runs the calculation against verified readings. If adequate, document it with a thickness survey. If not, the options are reduced maximum allowable working pressure and a corrected data report, or rejection and repair or replacement of the shell course. I do not accept the shop's assurance without the calculation.
• Nameplate and U-1A: corrected by the manufacturer as the code stamp holder, in agreement with the authorized inspector of record, so that plate and report match. Corrections are made by revision, not by hand annotation of the certified form.
• PWHT chart: the manufacturer retrieves the furnace chart with furnace identification, date, thermocouple locations, and signature, and confirms it corresponds to this vessel's heat numbers and cycle.
• Radiography: the manufacturer reconciles the report against the films and the data report, and corrects whichever document is wrong.

My role is to document the findings and withhold the recommendation for release. I cannot correct the manufacturer's records, and I should not sign to preserve a shipping date.

Partly. The manufacturer of record is the only party entitled to produce a corrected nameplate and a revised data report, so the proposal is directionally right but the details matter.

Acceptable: the manufacturer issues a revised data report reflecting the correct rating, and produces a new nameplate stamped to match it.

Not acceptable: attaching the new plate over the old one without controls. The old plate must be removed and destroyed or retained as a record, so that two conflicting ratings cannot exist on the same vessel. The new plate must be attached in the location required by the code, and the attachment method must not damage the shell or the plate. The revision must be traceable: a new data report, a record of why the original was superseded, and notification to the authorized inspector and the owner. If the vessel has already been registered with a jurisdiction, that jurisdiction may require notice of the corrected rating.

Before any of this, the underlying thickness question must be settled, because the new plate's rating depends on it. Restamping cannot be used to paper over an unresolved design deficiency.