specialty

Raven Lining Systems

Infiltration, inflow, corrosion and age eventually cause deterioration of any sewer system. As programs designed to fight corrosion and infiltration continue to grow, so do the items required to complete your rehabilitation. Manholes are an integral part of any system and require inspection, repair, rehabilitation and in some instances replacement. Raven Systems offers several products designed to extend the life of your manholes.

The product and or method of repair depends on the severity of the repair. In new construction raven is used as a guard against environmental attack while older systems may require additional work. It is not uncommon to find manholes in need of structural rehabilitation. Under these conditions a variety of methods may be used before the final protective coating is applied. These methods include stabilizing the structure with a repair mortar, sealing infiltration, removing all loose substrate. Depending on the desired results a manhole can be brought back into form. The depth of the lining is adjustable and can be applied in several coats until the desired strength is reached; a 1/8-inch Raven 405 is equivalent in strength to 1-1/4 inches of steel reinforced shotcrete.

Application methods for coatings include, brush, roller, spray, plural component spray and spin cast. Once again the variables play a large part in determining the proper application and procedures required for a successful project. Our staff, backed by the experience and knowledge of the manufacturer, offers you the most effective solution to you manhole rehabilitation projects.

		Infiltration, inflow, corrosion and age eventually cause deterioration of any sewer system. As programs designed to fight corrosion and infiltration continue to grow, so do the items required to complete your rehabilitation. Manholes are an integral part of any system and require inspection, repair, rehabilitation and in some instances replacement. Raven Systems offers several products designed to extend the life of your manholes. The product and or method of repair depends on the severity of the repair. In new construction raven is used as a guard against environmental attack while older systems may require additional work. It is not uncommon to find manholes in need of structural rehabilitation. Under these conditions a variety of methods may be used before the final protective coating is applied. These methods include stabilizing the structure with a repair mortar, sealing infiltration, removing all loose substrate. Depending on the desired results a manhole can be brought back into form. The depth of the lining is adjustable and can be applied in several coats until the desired strength is reached; a 1/8-inch Raven 405 is equivalent in strength to 1-1/4 inches of steel reinforced shotcrete. Application methods for coatings include, brush, roller, spray, plural component spray and spin cast. Once again the variables play a large part in determining the proper application and procedures required for a successful project. Our staff, backed by the experience and knowledge of the manufacturer, offers you the most effective solution to you manhole rehabilitation projects.

The Poly-Triplex® Process

Poly-Triplex® Technologies is revolutionizing the way environmental and utility problems are solved. Our patented liner system leads the industry in offering a permanent solution to corrosion, infiltration and exfiltration.

Poly-Triplex® Liners consist of three structural fabric components, and are fabricated at our manufacturing facility to ensure a custom fit for each project.

This structure was extremely deteriorated, and was subject to serious infiltration. The structure has been cleaned and grouted, and is now ready for the Poly-Triplex® Liner to be installed.

The liner is saturated at the jobsite with an epoxy resin that will bond to wet or dry surfaces, and is then lowered into place in the structure.

To cure the liner, pressure is applied at 1,000 per square foot, and steam is injected at 325 degrees. This process causes the removable inflation bladder to fully expand, forcing the liner to fill gaps, and bond to the surface of the structure, stopping all active infiltration.

After curing, the inflation bladder is removed - leaving the liner pressurized into the contours of the existing structure, forming a totally bonded, laminated composite. All indentations and openings of the original structure have been sealed, permanently stopping further deterioration, infiltration and exfiltration.

Once the inflation bladder is removed, pipe openings are reopened with a reciprocal or offset grinder. The liner is trimmed at the invert channel, and the sub-floor is removed.

The structure is now completely rehabilitated - and the Poly-Triplex® Liner System is guaranteed to keep the problems solved for at least 10 years. Our liner system works and it keeps on working - that's the Poly-Triplex® Difference!

Before
After

Inspection/Cleaning

Manned Inspection

System Evaluation

Critical assessment of system resources and operating functions is a basic element of our repair and rehabilitation services. We offer a wide array of methods and technologies to evaluate how best to approach remediation activities. With both remote controlled and manually operated video capability, we can produce high-resolution video images to diagnose and locate specific problems as well as overall system conditions.

If the diameter and or conditions allow, the best method of inspection is manned entry. The option of completing a detailed walk through inspection utilizing depth perception, measurements and core samples can quickly confirm conditions on the spot as well as the ability to produce samples of the pipe for analysis. Unfortunately, this option is not available as the pipe diameters are too small and/or too dangerous. In these cases, we are able to provide in depth inspection utilizing our remote equipment.

In order to perform a proper inspection the pipe sections will require cleaning. We utilize our fleet of high velocity jetter trucks to clean and dewater pipelines so that our camera trucks can scan the entire circumference of the pipe. If necessary the multi-use unit can be used to take samples of the pipe.