For several years now, the U.S. concrete pipe industry has witnessed a relentless attack on both professional engineers and the authority of local governments to set technical specifications for culvert, water, and wastewater pipes used in taxpayer-funded infrastructure projects. Working together through their industry association, U.S. concrete pipe manufacturers having been fighting back. Our goal is to protect and preserve the engineer’s authority to use his/her professional judgement in determining which piping materials are suitable for a particular project in a particular region of the country.

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This is a demonstration of the comparative flammability of polypropylene pipe (PP), reinforced concrete pipe (RCP), and high density polyethylene pipe (HDPE). Dry hay is ignited in three 18 in. by 18 in. pipes and allowed to burn. This is an unedited test conducted on October 21, 2015.