Olson Engineering System, Inc.

Ben Olson, Jr., Design Engineer and Randy Downing, Pipeline Contractor (right to left) in the hole to discuss a very tight fit and precise alignment required for installation of a 34” O.D. FPVC pipe inside an existing, 60 year old 36” RCP pipe. Over 450 feet of 32” Fusion welded PVC pipe (no bells or joints) was assembled on the ground then pulled in to the existing 36” I.D. RCP pipe. The assembly process required 2 days and the pulling process required less than 2 hours. The 36” RCP was over 7 feet lower than the invert of the 32” FPVC. This technique is becoming more popular and economical for replacing existing aging pipe.