All project materials, whether Piping Systems, Inc. procured or customer furnished, are 100% receipt inspected for correctness of size, descriptions, test report review and acceptance, sourcing adherence and quality. No materials are accepted into our material inventory unless signed off by the Quality Control receiving supervisor. When required for projects with full traceability, a PSI RIN number (Receiving Identification Number) is applied to each piece of material (including transfers for pipe cuts) to guarantee positive traceability to the applicable test report documentation.