Showing posts with label ACM Pipe. Show all posts
Showing posts with label ACM Pipe. Show all posts

Sunday, June 25, 2017

Asbestos-Cement (Transite) Pipe in Water Distribution Systems

Asbestos-cement (AC) pipe was used extensively in the mid-1900s in potable water distribution systems, particularly in the western United States. The Chrysotile Institute estimates AC pipe lifespan at 70 years, but actual service life depends largely on pipe condition and working environment. Because thousands of miles of AC pipe installed in distribution systems in the U.S. is nearing the end of its useful service life, AC pipe condition assessment and strategic replacement planning will need to be done in the coming decade. 

Over time, AC pipe undergoes gradual degradation in the form of corrosion (i.e., internal calcium leaching due to conveyed water and/or external leaching due to groundwater). Such leaching leads to reduction in effective cross-section, which results in pipe softening and loss of mechanical strength. Accordingly, as the water distribution system ages, the number of AC pipe failures increases with time. In light of these risks, an AC pipe condition assessment is essential to determine the remaining useful service life and develop a suitable, proactive replacement plan for the distribution system. 

Exponent engineers and scientists assist water agencies in development of strategic and cost-effective AC pipe replacement plans, customized to the individual challenges of the distribution system.

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