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Certa-Lok® Solves HDD Challenge

NAPCO Pipe & Fittings' C900/RJIB Certa-Lok® PVC Pressure Pipe was featured in the January publication of trenchlesstechnology.com. The article, Cartridge Method Solves HDD Challenge Across Hunting Bayou, by Christine Kirby, a Project Manager at Lockwood, Andrews & Newnam Inc, highlights how Certa-Lok was selected for a challenging project in Houston, TX. 

trenchlesstechnology.com

One of the major challenges was a 600-ft crossing at Hunting Bayou, one of Houston’s major waterways that meanders through northeast Houston until it reaches Buffalo Bayou at the Houston Ship Channel. With active nearby businesses and driveways on either side of the bayou, the entry and exit sites for horizontal directional drilling had to be carefully placed. On the west side of the crossing, there was room for the drill rig and entry point set up. On the east side, there was much less space, and the full pipe string could not be laid out without blocking a busy intersection. With fused pipe, each joint must be fused and allowed to cool, and the complete pipe string laid out prior to being pulled into the reamed hole. To avoid blocking the busy Centerwood intersection, the cartridge method of engaging each joint as the pipe was being pulled back provided the best solution. LAN recommended CertaLok C-900 RJIB (restrained joint integral bell) as the pipe material suited for this project. The pipe can be assembled easily and is not weather-dependent. The RJIB joint has a bell and spigot configuration with a spline groove available up to 12-in. diameter. Once the joint is engaged, the spline can be inserted through the groove to lock the joint in place. Certa-Lok RJIB cannot be overbelled because the spline will ensure that the pipe is correctly engaged. The spline can be removed and pipe can be disassembled if needed. Once the joint is engaged, no  cooling time is needed, and the pipe is ready to be installed right away.


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