Our Products At Work in the Field


A+ Wrap™ System: External Corrosion at a Tee and Bend


Baton Rouge, LA
January 14, 2018

Project Overview
An above-ground 4” liquid ethylene line at a plant required reinforcement from external corrosion at a 4” x 2” tee and a bend. The corrosion dimensions were 9.5” long x 6” wide x 0.06” deep at the two o’clock and six o’clock positions. The nominal wall thickness was 0.237 inches, with an ambient and pipe temperature of 55° F.

Repair Solution
A 20-year repair was designed using the A+ Wrap system with six layers for 30 linear inches total to restore the structural integrity of the pipeline back to pristine condition. 

Results
The repair was completed in two hours by a Milliken Infrastructure Solutions supervisor and contractor personnel. The repair area was gritblasted and wiped clean with acetone. EP420 filler was applied to girth welds and transition areas, and a PPR epoxy coating was applied to the entire repair zone. The two-inch wide A+ Wrap system was applied using the “spiral” method for six layers across 30 linear inches. Constrictor wrap was applied, perforated and allowed to cure. Later, the wrap was removed and a topcoat was applied.  

A+ Wrap_External Corrosion_Baton Rouge_Grit BlastedA+ Wrap_External Corrosion_Baton Rouge_EP420A+ Wrap_External Corrosion_Baton Rouge_After