Pipelines carry crucial resources such as water and energy. Over time, they can deteriorate due to wear and tear. Maintaining pipelines is a vital element of sustainable infrastructure. In this article, we will explore the various pipeline rehabilitation techniques.
Pipeline Repair
When specific sections of pipelines get damaged, imminent repairs are crucial. Repairs are conducted to repair minor issues which do not call for total replacement. Common repair methods include:
Welding: Welding is used to fix small cracks or leaks by joining metal segments together. It’s a cost-effective and relatively quick solution for minor damages.
Sleeving: A protective sleeve is placed upon the damaged section to reinforce the area. This method is effective for external corrosion or localized damage.
Clamping: Clamps are applied to seal leaks and reinforce weakened sections temporarily. They are a temporary solution while planning for a more permanent fix.
Pipeline Replacement
Pipeline replacement involves completely removing the deteriorated pipeline and installing a new one. Even though this is a long-term solution it comes with its own set of problems.
Excavation and Trenching: Damaged pipeline needs to be dug up and removed. This calls for excavation and trenching, a time-consuming and costly procedure. In addition, it disrupts the surrounding environment.
Horizontal Directional Drilling (HDD): This technique involves drilling a hole underground to install a new pipeline through. HDD minimizes surface damage, thus suitable for urban areas.
Slipping: This technique involves a smaller diameter pipe being pulled through the old one. If a smaller diameter carries the intended load, slipping is a perfect solution without damaging the surface.
Cured-in-Place Pipe (CIPP): This method inserts a flexible liner into an existing line. This creates a seamless transition and restores integrity.
Linings: Linings are mostly used in PE-covered gas pipes. Gas pipes usually have PE coating on top of the steel surface. Some alterations cause this coating to be removed. Before the trench is closed, a new layer of lining is required.
Conclusion
Upkeep of pipelines is a crucial element of maintaining infrastructures. Deciding on a maintenance method is a complex one and requires consideration. Professionals must weigh the involved factors to make informed decisions.
