Trenchless Technology

OCT 2018

Trenchless Technology is the premier communications vehicle for the trenchless industry. Through our multiple platforms, readers receive insights into the trenchless industry, as well as keep connected to the latest news, products and projects.

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W W W.T R E N C H L E S S T EC H N O LO GY.C O M 31 excavation alone – not including re- pairing the joints – would range from $40,000 to $50,000. Ragula knew a trenchless solution was needed. PSE&G uses the sliplining process for many projects; however, the utility needed to maintain the 15 pounds per square inch gauge (psig ) capacity on this main and thus was ruled out . " In addition to its proximity to the university and being a heavily- traf- icked roadway, the feeder main shares a crowded subsurface space. This in- cludes a telephone facility with tile ducts, water, two sewers, cable and a parallel 12-in. low pressure main," Ra- gula says. " The only viable and cost- effective approach that would guaran- tee minimal disruption was trenchless renewal using CIPL ." The CIPL main relining process is nothing new to Ragula, PSE&G and PPM. In the last 25 years PSE&G has relined several key sections of its dis- tribution network throughout the Garden State using this technology winning Trenchless Technology Proj- ect of the Year honors in 2011, and ty- ing a world record with a 30-in. Star- line install three years ago. "George [Ragula] approached us and said that PSE&G had a 36-in. critical feed near Seton Hall that had leaks and they knew they could save some money with this method," says David Wickersham, president and CEO of PPM. " We [PSE&G and PPM] approached Karl Weiss in Berlin, the patent holder of the Starline process, about what we would need to get it done." Though the overall project time- frame was a little more than two months – Sept . 5 to Nov. 19, 2017 – the planning and equipment pro - curement that went into this arduous project took more than half the year to plan. PPM beefed up its vacuum capabili- ties – necessary to remove the sand- blasted grit and scale from inside the 2,000 ft stretch of pipe – and procured a larger inversion cone and pressure drum from Karl Weiss that was ap - proximately the size of a 12-ft box truck. " From an operational perspective, everything we have learned in our 16 years did not give me any pause on designing this project and complet- ing it successfully," Wickersham says. " Based on our experience and based on the strong partnership with PSE&G and Karl Weiss, we really didn't have any pause in going after this." The project included four lining segments – segment one, 650 ft; seg- ment two; 565 ft; segment three, 450 ft and segment four, 260 ft – and one PSE&G and Progressive Pipeline Management devised a series of vacuum trucks to create a Venturi system to remove the silt and grit from the pipe cleaning process in advance of the relining.

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