To guarantee the right approach in every situation we also offer pipeline rehabilitation, applying numerous methods and materials. This allows us to provide our clients with the most suitable and cost-efficient solution for their project, depending on the condition of the pipeline, its type and specifications, egg. pressure, gravity, non-circular profile, project budget, etc. Trent solutions has experienced specialists and machines for several different technologies, such as Cured in Place Piping (both thermal and UV cured), Polymer Coating, Sewer Pipe Renewal.
According to the best practices, a complete length of a damaged pipeline should be rehabilitated, in order to achieve best functionality and maximum life span of 50 and more years. However, for extremely short deadlines or tight budgets, a partial rehabilitation of the most endangered sections is also possible.
CURED IN PLACE PIPING
This method is used for the rehabilitation of pipelines made of steel, cast iron, asbestos cement, reinforced concrete, PVC, etc., which have been damaged as a result of various effects, such as corrosion, subsidence, cracking, hydraulic shocks, deposition. It is applicable for inner diameters between 150mm and 1220mm, divided in sections up to 250 – 350m (depending on the diameter and other factors).
This method fully eliminates leaks, strengthens the durability of the pipeline in case of earth movement, vibrations, hydraulic shocks and improves its hydraulic properties and wear resistance, by creating a smoother inner surface at the cost of neglectable reduction of the inner diameter. The method increases the life expectancy of the pipeline with 50 and more years of structural durability.
As a preparation for the rehabilitation, the pipeline section needs to be cleaned with a pressure washer. The rehabilitation itself represents the installation of a waterproof liner in the form of a flexible seamless pipe, made of a reinforcing layer(s) of polyester or glass fibers and sealing wear-resistant layer of polyethylene into the inner side of the existing pipeline. The resin impregnated felt tube is installed as a result of an eversion process (inside-out), utilizing compressed air. When installed, the liner gets tightly fitted to the inner side of the pipeline and the resin gets hardened, with steam or UV lamps (for resins containing photosensitive reagent). At the end a cutting robotic is used to reinstate any branch line connections.
POLYMER COATING
This technology is applicable to non-pressure or low-pressure pipelines with a diameter from 800 mm to 2400 mm and more. It finds common application in the rehabilitation of non-circular pipelines, tanks and other water containing and processing installations, manholes, vertical and inclined pipelines. The result of the rehabilitation is a new structurал pipe, created with the injection of a special polymer material into the inner surface of the old pipe.
A unique advantage of the polymer coating is that it allows multiple layer applications, which after hardening results in a monolith coating with uniform physical and chemical properties
SEWER PIPE RENEWAL (SPR)
The right technology for sewers, low-pressure pipelines, rain drainage, made of of brick, concrete, cast iron, fiberglass, plastic or any other material. It ensures structural rehabilitation of severely damaged pipelines, even in harsh terrain conditions, with absolutely no trenching at all. The SPR technology is suitable for the correction of hydraulic anomalies and in some cases, it allows the rehabilitation of curved pipelines.
The technology is based on the principle of “in-place” pipe production from continuous plastic (PVC or HDPE) factory manufactured strip of high stiffness and low weight. The installation of the pipe is conducted, while using only existing shafts. The strip is winded up with specialized machinery, positioned directly in the shaft and thus the pipe is produced.
Depending on the modification, the new pipe is either pushed into the existing one from one shaft to the other, or the machine itself travels along the sewer, while producing the new pipe. The profile of the strap is designed so that it produces a waterproof cylinder and forms a firm lock during the process of winding. In the next step the cylinder’s diameter is expanded until it is tightly fixed and in certain circumstances grouted to the old pipe.
As a result, infiltrations and exfiltrations are completely eliminated, the hydraulic properties improve and wear-resistance of pipelines and extends is prolonged by 50 and more years.