THE HIGH-PERFORMANCE CRITICAL INFRASTRUCTURE COMPANY Easy to Install | Cost Effective to Deploy | Durable for Decades Contour Takes on External Corrosion at a Chemicals Factory PIPE DETAIL 25-mm (1-inch) diameter. API 5L Grade B steel. 4 bar (58 psi) design pressure. 40° C to -40 °C (104° F to -40° F) design temperature. 3.9 mm (0.15 inch) original wall thickness. 1 mm (0.04 inch). remaining wall thickness. External corrosion. Ammonia pipework SUMMARY A Contour repair was installed on a 1-inch (25-mm) diameter API 5L Grade B steel pipeline with 3.9-mm (0.15-inch) wall thickness that had eroded to 1 mm (0.04 inch). A trained technician carried out the repair in 3 hours. Inspections at a chemicals factory revealed significant corrosion on a 25-mm (1- inch) diameter API 5L Grade B steel pipel

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