Industrial and municipal pipe rehabilitation in Hartford

Buried pipe nobody planned to dig up

The industrial and institutional properties around Hartford, manufacturing plants, food processors, hospitals, universities, distribution centers and the municipal systems that connect them, all run on pipe that was buried once and expected to stay buried. Process drains cross beneath production floors. Plant sewers pass under rail spurs, truck courts and tank farms. Storm culverts carry runoff beneath access roads. Some of the oldest municipal lines in Connecticut are brick or unreinforced concrete. How these fail depends on the age of the facility and the ground it sits on: corrosion, root intrusion, joint separation, infiltration, settlement. What they have in common is that fixing them by excavation means halting production, manifesting contaminated spoil as hazardous waste, and closing a roadway or a production floor for weeks at a stretch. Trenchless rehabilitation was developed for precisely this situation.

Lining a large pipe

The technique is the same one used on a residential lateral, scaled up. The segment is surveyed and jetted, a resin-saturated tube cut to the pipe's diameter is inverted or winched into position, inflated against the wall and hardened with hot water, steam or UV lamps until it forms a continuous structural pipe within the host. Work from 4 inches through 36 inches and beyond is routine. The design basis fixes the liner wall thickness for burial depth, groundwater and traffic loading, and selects the resin for the chemistry it will encounter: polyester where the service is sanitary or storm, vinyl ester or epoxy where heat and aggressive effluent are involved. The engineering behind those decisions is described at the cured-in-place pipe reference.

The outage, the bypass and the paper trail

Any industrial lining project is, first and foremost, an outage plan that happens to contain a pipe repair. Flows are gauged, temporary pumps and hose carry them past the work zone, the isolated segment is jetted clean, lined and cured, and service resumes within the window operations signed off on. Each stage generates its own record: the survey footage and condition report from before the work, the engineering calculations and resin certification for the liner, the temperature and pressure log from the cure, the footage of the finished pipe and, where the specification calls for one, a leak or pressure test. For a facility manager or a public works director those documents are as much the deliverable as the pipe itself.

Sectional repairs, bursting and culverts

A liner along the full length is not always the appropriate amount of work. One cracked joint, a root ball at a single connection or an offset at a manhole is handled with a sectional liner, a few feet of resin sleeve cured exactly over the flaw in a matter of hours. A segment that has collapsed, or is too small for current flow, is replaced by pipe bursting, which draws new pipe along the old alignment between two pits and can increase the diameter in the same operation. Storm culverts are a category of their own: corrugated metal fails along the invert, concrete separates at the joints as the soil moves and, in colder climates, as it freezes and thaws, and either is relined without closing the road above.

Selecting the contractor

Large-diameter work should go to a contractor with the equipment, the engineering staff and a portfolio of comparable jobs to prove it. the verified installer directory lists installers who have been through that review, and how the network verifies installers describes what the review examines before a contractor is included: license, equipment and documented completed work. Hold your own project to the same test and ask for references at a matching diameter and service, the engineering basis for the liner wall, and an example of the closeout package you will be handed.

Getting a project started

It begins with an inspection and a written condition assessment. At a plant the trigger is typically the one drain that keeps backing up or the culvert that is visibly failing, and it frequently expands into a ranked inventory of every buried line on the site, which converts a string of emergencies into a capital plan with dates attached. The assessment also gives a facility a baseline to measure against, so that the next survey shows whether a line is stable or deteriorating and how quickly.

Estimates are free. Call now: (877) 880-8125.

Industrial services in Hartford

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