Colson Valves: Why Traceability Matters

On an offshore platform, an FPSO, or a petrochemical plant, valves are trusted to hold up for years, often with no easy access to check on them. That trust comes from knowing exactly what each valve is made from, how it was built, and how it was tested, back to the raw material.

That's what traceability provides: a record connecting a valve, however long it's been in service, back to the exact material it came from and every process it went through. Colson Valves, a UK-based valve manufacturer, builds that chain in-house at its Rotherham facility.

Traceability is built document by document as material moves through manufacture, and each link has to hold with the same rigour as the last:

The mill certificate. Before material reaches a machine tool, a certificate to EN10204 3.1 confirms the specific cast or heat it came from, its chemical composition and mechanical properties, tested by a body independent of the manufacturer.

In-process records. Every stage afterwards – machining, assembly, heat treatment – must be recorded against the same batch. This is where traceability is easiest to lose: a mislabelled batch breaks the chain even if the paperwork at either end looks correct.

Testing and inspection. Pressure testing, function testing and dimensional inspection all tie back to the same material record, against the specific valve rather than a batch average.

Despatch documentation. The final pack – certificates, inspection records, project-specific documentation – has to match the physical valve it ships with, and can run to a dozen or more documents on complex projects.

In oil and gas, offshore and process industries, a break in this chain has real consequences. If a valve fails and the record is incomplete, the investigation has a gap in it from the start – material defect, manufacturing fault, or specification error? That's hard to close out with an operator, an insurer, or a regulator, and hard to reconcile with the compliance most operators require before installation. And when a valve is one of hundreds on a facility, identifying the exact batch and sign-off for one component quickly is what keeps a review contained.

Full traceability only works if it's built in from the first stage of manufacture – reconstructing it retrospectively is where gaps creep in. At Colson, design, machining, assembly and testing all happen under one roof at its Rotherham facility, with traceability maintained to EN10204 3.1 throughout, so the documentation pack matches exactly what was done to that valve.

If you're specifying valves for a project, talk to Colson about what a full documentation package should look like before committing to a supplier.

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