October 19, 2026 · Indumor
“If it is not on paper, it does not exist.” Any quality inspector who has received a structure at a mine or an oilfield location says it. It can be the cleanest piece in the world: without its papers, it sits quarantined in the yard until they show up. That set of papers is the quality dossier — or manufacturer’s data book — and in mining and oil it is as much a part of the order as the steel. These are the eight documents it contains.
Agreed before work starts. It states what gets checked, when, against what criteria and who signs: which points are hold points, where nothing moves without the client inspector’s release, and which are witness points. It is the map for everything else. Without it, every check becomes an argument.
Every plate and section arrives with its mill certificate, reporting chemistry and mechanical properties. But the certificate only matters if it can be tied to the part: that is why the heat number is transferred to every cut piece and logged. That way, any part in the dossier can be traced back to the mill.
Every joint type is welded under a written, qualified procedure: the WPS says how to weld, and its qualification record proves, with tested coupons, that the procedure produces sound welds. Structures commonly follow AWS D1.1; vessels and piping, the ASME code. It is not bureaucracy. It is the proven recipe.
Beyond the procedure, each welder must be qualified for the process and position they weld, with current records. The dossier shows which welder made which joint. If something fails, you know who, how and when.
Measurements checked against the drawing, with tolerances. For structures bolted together in the field, this report is the difference between an erection of hours and one of days.
Visual inspection of every weld and, per the plan, dye penetrant, magnetic particle, ultrasonic or radiographic testing performed by qualified inspectors. Each report states what was tested, by which method, with what result and who signed it.
Surface preparation grade before painting, measured dry film thickness, adhesion and ambient conditions during application. For galvanizing, the coating thickness. Corrosion starts wherever this report was done badly.
Everything that deviated from plan, and how it was resolved. The certificate of conformity declaring the piece compliant, as-built drawings and the packing list. It closes the dossier. And unlocks receiving.
The most common mistake is assembling the dossier at the end, when the piece is already on the truck. It does not work. The dossier is built during fabrication, as each check is done and signed: material logged on arrival, welds as they are welded, tests as they are run. At the end, it just gets compiled.
On the other side, someone reads every page. The client’s quality department, the inspector who visits the shop at hold points and, often, an independent third-party inspection company hired by the operator or the main contractor. They check that every document exists and is signed, that heat numbers match the parts and that testing covers what the plan required. A clean dossier gets approved in hours; a messy one triggers weeks of back-and-forth.
With an index, numbered pages, legible signatures and a digital copy organized by piece or package. On projects with international owners, sometimes in English or in both languages. And with the same logic as the load: if the truck carries twenty packages, the dossier must let you find each one’s papers without searching.
A dossier is also a calling card. It shows whether the shop works with method, controls what it does and can sustain quality over time. That is why operators scrutinize it on the first purchase more than on later ones: it is the proof that the shop can be trusted. Testing is explained in X-ray and dye penetrant, welding processes in MIG, TIG or stick, and how a new supplier uses all this in becoming a mining supplier.
A recurring case: a hopper reaches the mine and gets quarantined because the mill certificate for the cone plates is missing. The part is perfect. The paper is not. With traceability from the first cut, that paper exists before the truck leaves. At Indumor we ship the dossier with the load, in Spanish or English; if your next order needs one, tell us when quoting and we will build it from the first cut.
We build it from the first cut and ship it with the load.
© Indumor 2010–2026 — Industrial steel fabrication, Córdoba, Argentina
