How We Control Quality from Material Intake to Final Inspection
Our quality assurance system is built around a single principle: inspect and control at the stage where a problem is cheapest to fix, not after it has progressed through subsequent production steps. This means inspection is embedded at every stage of the production process — not concentrated at the end.
The system is aligned with ISO 9001:2015 and applied consistently across all orders, regardless of order size or component type. The standard provides the documented framework; the process provides the discipline.
Production Sequence and Inspection Points
Every order passes through a defined production sequence. Inspection and verification are applied at each of the following stages:
1. Technical Drawing Review
Before production is released, engineering reviews the client drawing for completeness, dimensional feasibility, material specification, and any features that require clarification. Technical queries are raised and resolved before production begins. This stage defines the acceptance criteria that inspection will verify throughout production.
2. Incoming Material Verification
All raw materials — steel stock, alloy additions, and purchased components — are verified against specified chemical composition and mechanical property requirements before entering production. Material certificates are reviewed and cross-referenced against heat or batch identification. Material that does not meet specification does not enter the production sequence.
3. First Article / Sample Approval
For new components, a first article is produced and fully inspected before batch production is released. Dimensional, material, and where applicable hardness and NDT results from the first article are reviewed and confirmed against the drawing and specification before the production batch proceeds. This stage catches tooling, pattern, or process issues at the point of minimum cost.
4. In-Process Inspection
Critical dimensions and process parameters are verified at each production stage — casting dimensions before heat treatment, hardness after heat treatment, machined features during and after machining. Deviations are identified and addressed at the stage where they occur, not carried forward.
5. Non-Destructive Testing
Our dedicated in-house NDT team, independent of the production function, performs:
- Ultrasonic Testing (UT) — volumetric examination of casting soundness, particularly for thick-section castings and structurally loaded components where internal shrinkage or cracking would not be detectable by surface inspection.
- Magnetic Particle Inspection (MPI) — surface and near-surface crack detection on ferromagnetic components after casting, heat treatment, or machining.
- Dye Penetrant Testing (PT) — surface crack detection for non-ferromagnetic materials or surfaces where MPI is not applicable.
NDT is applied where specified by the client, where component type or application warrants it by engineering assessment, or where in-process observations indicate a need for additional verification.
6. Final Inspection
All components undergo final dimensional and visual inspection before being approved for packing. Final inspection results are recorded and form part of the delivery documentation. No component is packed without a completed final inspection record.
7. Documentation Compilation
Inspection documentation is compiled and supplied with each delivery. Standard documentation includes chemical composition reports, dimensional inspection records, and hardness test results where applicable. Additional records — heat treatment charts, NDT reports, third-party inspection certificates — are included where specified or applicable to the component type. All documentation is supplied in English as standard.
Batch Traceability
Each production batch is traceable from raw material heat through to finished component. Material heat numbers, heat treatment batch records, and inspection records are linked to the component batch identification. This traceability allows any field performance issue to be traced back to specific production parameters and material sources, and supports root cause analysis when required.
Corrective Action and Continuous Improvement
Any deviation identified during inspection — whether at an in-process stage or at final inspection — triggers a documented root cause analysis and corrective action. The corrective action record defines what went wrong, why it occurred, and what process change prevents recurrence. These records are reviewed periodically to identify systemic patterns and drive process improvement.
Third-Party Inspection
Pre-shipment inspection by client-nominated inspectors or third-party agencies (SGS, Bureau Veritas, or equivalent) is accommodated on request. For most orders, our standard in-house inspection documentation is sufficient for client acceptance without additional third-party involvement. Where third-party inspection is not required by the client’s procurement process, we will say so directly rather than recommend it as a default — it adds cost and lead time without adding quality when our documentation already covers the client’s acceptance criteria.
For questions about our quality system, inspection capabilities, or documentation standards, contact our engineering team.