Codes, Standards, Documentation, and Release of Equipment
The code framework
Know which document answers which question. ASME Section VIII Div. 1 covers vessel design, fabrication, inspection, and testing; Section IX covers welding and brazing qualification; Section V covers NDE methods; Section II covers material specifications. ASME B31.3 governs process piping and B31.1 power piping. API standards fill in equipment-specific requirements: API 650 and 620 for tanks, API 660 and 661 for exchangers, API 600, 602, 608, and 609 for valves, API 598 for valve testing, API 510 and 570 for in-service inspection. Material standards such as NACE MR0175/ISO 15156 may be invoked by the specification.
Documentation
The manufacturer's data report (U-1, or U-1A where more than one manufacturer is involved) is the legal summary of the code work; it must match the actual construction and be signed by the manufacturer and, where required, by the authorized inspector. Supporting records include material certificates, WPS/PQR and welder qualifications, NDE reports and film, heat-treatment charts, test records, calibration certificates, nonconformance reports with dispositions, and the as-built drawing. Check the revision status of every drawing and procedure; an obsolete revision is one of the most common audit findings.
Release
Release for shipment is a formal gate, not a courtesy call. Confirm every hold point is signed off, all nonconformance reports are closed or formally accepted as-is, the data book is complete, painting and preservation are done, and shipping marks match the packing list. The purchaser's written authorization must be on file before equipment leaves the shop.
Traps
Accepting a data report signed only by the vendor when the code requires the authorized inspector; treating release as the inspector's decision alone.
Worked example
A missing impact-test certificate for a one-inch nozzle forging holds the entire release, even though the vessel has already passed its hydrotest.
Rule of thumb
No signature, no shipment.