By: George Ragula, Ragula Tech
Trenchless Works - November 2022
This summary contains excerpts from the article published in the November issue of Trenchless Works.
DOWNLOAD FULL ARTICLE
At the NASTT 2022 No-Dig Show in Minneapolis, Minnesota, USA in April, 2022, Trenchless Technology magazine presented a Project of the Year Award for this project. The trenchless renewal project included lining a 30 to 36 inch large diameter high pressure gas pipeline that crosses a river in central New Jersey.
The teams encountered numerous challenges and complexities that required engineering, design and innovation. The project has since been affectionately named “The Mess.”
Large diameter gas pipelines regularly use lining techniques as a ‘go to’ option for extremely complex and challenging projects.
The renewal of a 30 to 36 in (760 mm to 910 mm) diameter leaking high pressure (HP) gas main, operating at 15 psig, which crosses a river in central New Jersey, USA had significant challenges and required engineering design solutions to be developed for a successful lining operation. Not only did the pipeline run very deep to cross beneath a concrete sluiceway, it also carried six bends including a stack drip, a 36x30 in (910 mmx 760 mm) diameter reducer and a 30 in (760 mm) diameter valve that could not be removed.
There was also a deep buried 20 in (500 mm) diameter lateral coming off the larger diameter main. The complexities of the project were further enhanced by the overall depth of the pipeline, high water table, monitoring wells constructed in an old leaking gas station, and the stack drip that could not be removed.
“This was the most challenging positive pressure lining project ever completed by the project team. The design and planning, engineering, shop testing and teamwork was key to its success from conception to construction. Tackling each challenge presented was due to decades of experience, innovative design and consideration of intended success or failure. The break-through innovations and advancements contribute to the expanded use of liners on challenging projects in the future.”
Download the complete article: LINING A GEOMETRICALLY COMPLEX MESS INVOLVING A LEAKING GAS MAIN or click on the image.
About PPM: Progressive Pipeline Management is a full service contractor and team of highly skilled infrastructure renewal specialists. The company has been improving the safety and longevity of pipeline infrastructure since it started in 2002. PPM’s primary expertise is trenchless technologies that restore aging, damaged or leaking underground infrastructure, including pipelines of all types and sizes.
