Search
Filters
Close

Field and Laboratory Experience with Polyurethane Pipe Linings

The Bureau of Reclamation’s Materials Engineering Research Laboratory has been evaluating polyurethane pipe linings for severe immersion exposure, specifically for outlet works and penstock linings. Polyurethanes have several advantages over other coatings, such as application temperature range, faster cure times in cold temperatures, rapid return to service, coat large surface area rapidly, low viscosity (i.e., accommodates pumping over longer distances), and greater impact resistance. 

Product Number: 41214-863-SG
Author: Allen Skaja, David Tordonato, Bobbi Jo Merten
Publication Date: 2014
$0.00
$20.00
$20.00

The Bureau of Reclamation’s Materials Engineering Research Laboratory has been evaluating polyurethane pipe linings for severe immersion exposure, specifically for outlet works and penstock linings. Polyurethanes have several advantages over other coatings, such as application temperature range, faster cure times in cold temperatures, rapid return to service, coat large surface area rapidly, low viscosity (i.e., accommodates pumping over longer distances), and greater impact resistance. The laboratory testing has utilized Electrochemical Impedance Spectroscopy as a screening/ranking method in the selection of new coatings for severe service environments. The polyurethane linings have superior barrier resistance compared to epoxy linings. However, long term (4 years) water immersion exposure produced large blisters and severe undercutting in scribed panels. This undercutting has also been witnessed in a Reclamation field assessment where polyurethane linings were used. Potential permanent repair solutions to this problem will be discussed.

The Bureau of Reclamation’s Materials Engineering Research Laboratory has been evaluating polyurethane pipe linings for severe immersion exposure, specifically for outlet works and penstock linings. Polyurethanes have several advantages over other coatings, such as application temperature range, faster cure times in cold temperatures, rapid return to service, coat large surface area rapidly, low viscosity (i.e., accommodates pumping over longer distances), and greater impact resistance. The laboratory testing has utilized Electrochemical Impedance Spectroscopy as a screening/ranking method in the selection of new coatings for severe service environments. The polyurethane linings have superior barrier resistance compared to epoxy linings. However, long term (4 years) water immersion exposure produced large blisters and severe undercutting in scribed panels. This undercutting has also been witnessed in a Reclamation field assessment where polyurethane linings were used. Potential permanent repair solutions to this problem will be discussed.

Also Purchased