A Framework for the Robust Design of Laboratory Tests for Spray Applied Pipe Liners Using the Taguchi Optimization Method

The deteriorating state of North America’s pipeline infrastructure requires advanced renewal technologies that undergo rigorous testing, provide complete structural integrity, and ensure a swift return to service. Despite the vast amount of testing on polymeric spray-applied pipe liners (SAPLs) and the acceptance of SAPL as a structural solution, there is room for improvement within its testing requirements and certification. For instance, there is the absence of a systematic approach to the design experiments for SAPL testing. Addressing this gap, the study introduces a framework developed using the widely accepted Taguchi method. This comprehensive approach incorporates diverse SAPL characteristics, manufacturing factors, application and field conditions, and specimen preparation, effectively bridging the current sensitivity and improving the consistency of testing results.