Miles of pipe will be fused in the Sonoran Desert in Arizona
McElroy’s MegaMc 1600 fusion machine was selected to fuse pipe in support of drought mitigation activities being undertaken by the U.S. Department of the Interior’s Bureau of Reclamation. As a part of an ongoing initiative to preserve water resources during the west’s ongoing and historic drought, Reclamation is updating aged infrastructure to be able to achieve greater efficiency out of its water delivery systems.
Materials for an effort to replace aged and leaking concrete water delivery structures were delivered in March near the Mexico border in San Luis, Ariz. By fusing 48-in. high-density polyethylene (HDPE) pipe to replace a failing 42-in. concrete pipeline, the government will be able to make beneficial use of pumped drainage water that is otherwise harmful to the area’s agricultural economy.
R&B Co. of San Jose, Calif., a utility supply solutions company, supplied the machine that would best fit the application, along with 40,000 ft of pipe. They also provided certified fusion operator training for the maintenance crew from the Reclamation’s Yuma office.
The MegaMc 1600 wheeled fusion machines have been used on large-diameter pipe jobs in a variety of applications worldwide. They feature four jaws with more than 80,000 lb of fusion force, allowing operators to overcome heavier drag forces and fuse thicker-wall pipes.
Standing 9 ft tall and stretching 15 ft in length, the 21,000-lb machine is imposing, but its components—including the jaws, pipe lifts, heater and facer—are hydraulically powered for smoothness and ease of use.
When considering a pipe material, a multidisciplinary team of engineers analyzed many types, including steel and reinforced concrete, but selected JM Eagle’s PE 4710 SDR 17/IPS 125, which was recommended by R&B for its strength, durability and flexibility. Properly fused HDPE pipe is leak-free and resistant to corrosion and weather. Studies indicate it can last 100 years.
McElroy’s technical and engineering support team was onsite the first day of the job to re-instill best practices in the operation of the machine and to spend one-on-one time with each of the fusion operators to review each step of the fusion process. Safe operation of the facer and heater were stressed, and McElroy’s DataLogger 5 was used to record the parameters of the fusion process to ensure and document that the operator produced a quality, leak-free joint.
McElroy also assisted with jobsite setup utilizing a series of pipe stands, strategically situated on either side of the machine for support, which prevent pipe damage, reduce drag for a quality fusion and boost productivity.
The crew will eventually be performing a total of about 600 pipe fusions for the six-mile pipeline and is planning on being able to perform about 12 fusions per day in two four-man shifts. The MegaMc 1600 will get a good workout, but so will the crew, with temperatures in the Sonoran Desert—the hottest desert in North America—easily reaching 120 degrees.
The first phase of the project is expected to be complete this fall, with two other, larger phases to be completed by 2018. As the project moves forward, McElroy sees opportunities for more involvement on the project with more of its pipeline productivity equipment and fusion machines to help finish the job.