Every EPC project is unique, but quality failures follow patterns. Here are the five most common issues we encounter on Gulf Coast chemical plant and processing facility projects.
1. Incomplete Welder Qualification Records
Welders working outside their qualification range — a welder qualified for carbon steel assigned to stainless steel without proper WQR. The weld may be physically sound, but the paperwork doesn't support it.
Prevention: Verify every welder's qualifications against the WPS before they start. Maintain a qualification matrix.
2. Coating Applied Without Proper Surface Prep
Coatings applied outside temperature range or on surfaces with residual mill scale, dust, or moisture. Coating failures almost always trace back to surface preparation.
Prevention: Require coating inspection at the surface prep stage, not just DFT measurement.
3. Missing Material Test Reports
Materials installed without MTRs, or with MTRs that don't match material markings. Traceability gaps create documentation nightmares at turnover.
Prevention: Verify MTRs at the point of delivery, not after the material is welded in.
4. Hydro Test Procedure Deviations
Incorrect test pressures, boundaries not isolated, joints not accessible during test, inadequate hold times.
Prevention: Review the hydro test plan before the test. Walk down boundaries. Verify calculations.
5. Punch List Items Not Tracked to Closure
Items identified, logged, and forgotten. A rigorous punch list with clear ownership and verification is essential for clean closeout.
The pattern: Most failures are documentation and process failures, not technical failures. The work is usually competent — the breakdown is in tracking and documenting. That's exactly where 3rd party QC adds the most value.
Need 3rd Party QC, CM, or Safety Support?
BIG provides independent quality assurance, inspection, construction management, and safety oversight for EPC projects in Houston and the Gulf Coast.
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