ADS N-12 pipe meets the requirements for Type S pipe under the American Association of State Highway and Transportation Officials (AASHTO) specifications M 252 and M 294. It can be specified for culverts, cross drains, storm sewers and other types of new and rehab projects. “This is a sustainable solution that not only takes care of runoff but also makes use of recycled plastic in the manufacturing of the HDPE pipe,” Currence continued. “Corrugated HDPE pipe has the least en- vironmental burden compared to other commonly used pipe for storm- water drainage and culvert applications. This was the conclusion of a life-cycle assessment study conducted Franklin & Associates. They investigated reinforced concrete, corrugated steel, PVC, and two types of corrugated HDPE pipe. HDPE pipe made with virgin resin and HDPE pipe made with recycled content were found to have the best overall sustainability rating.” ADS is the largest plastic recycling company in North America using more than half a billion pounds of post-consumer plastic every year. “The success of the project completed during the third quarter of 2021, shows the ability of HDPE pipe to provide a watertight retention sys- tem that is both cost effective and a superior, sustainable replacement for precast vaults, CMP and RCP systems,” Currence offered. Additional information can be found at www.plasticpipe.org and www. plasticpipe.org/drainage . The largest of five retention beds was constructed from 24,500 ft (4.64 miles) of 60- inch diameter corrugated HDPE pipe. This shows the bed 50 percent completed.
developers to include stormwater management systems that protect the environment. In Greencastle, the five retention beds can hold about 1.5 million gallons of water that will have a controlled output rate after being treated to remove total suspended solids and other pollutants. As this is probably the largest single-project use of corrugated HDPE pipe for stormwater management - one bed had 24,500 ft (4.64 miles) of 60-inch diameter pipe - the solution of using the HDPE pipe with its cost and time benefits magnify the versatility, strength, flexibility and long-life of the pipe.The key was the HDPE pipe that could be deeply buried, provided a very favorable installed cost and is rated to last at least a hundred years.” The ADS N-12 dual-walled corrugated HDPE pipe is certified to meet CAN/CSA Standard B182.8, BNQ 3624-120 plus AASHTO Load Resistance Factor Design (LRFD) specifications The ADS N-12 pipe has a smooth inner wall to provide optimum hydraulic flow. Its structural strength from a corrugated outside will support H-25 live loads with 12 inches of minimum cover for most pipe diameters. Sections are joined together using the pipe’s watertight integral bell and spigot with a factory-installed gasket. The pipe requires no extra couplers to install. The watertight connection between sections at 10.8 psi meets or exceeds the ASTM 3212 lab test and the ASTM F2487 infiltration/exfiltration field test, conforming to Environmen - tal Protection Agency guidelines.
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October 2022 csengineermag.com
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