CUI Case Study
Case Study on Rope Access Techniques for CUI Inspection
National Petroleum & Refining Association
Document MC-02-87
THE USE OF ROPE ACCESS TECHNIQUES TO INSPECT FOR CORROSION UNDER INSULATION ON TOWERS IN AN OPERATING PROCESS PLANT
Site # 1 Work Scopes CUI visual and ultrasonic inspection of tower (8’ diameter x 175’ height) and its 18” overhead line.
Site #1 Cost Comparison

Site #1 Schedule Comparison

No safety incidents
Site # 1 – 65% cost savings using Rope Access methods as compared to conventional scaffolding based on fixed price quotes with 32 days for completion verses an estimated 75 days for scaffolding.
Site # 2 Work Scopes
CUI visual inspection of tower (10’ diameter. X 100’ height) and overhead line (12” diameter x 115’ length).
Site #2 Cost Comparison

Site #2 Schedule Comparison

No safety incidents
Site # 2 –. 45% cost savings using Rope Access methods as compared to conventional scaffolding based on fixed price quotes with 7 days for completion verses an estimated 21 days for scaffolding.