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What lies beneath

What lies beneath

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Adhesive sealant

When cured, MS Polymer-based Bull Seal forms a high-strength seal even when applied under water. With high initial tack strength, the all-in-one product caulks, seals, and bonds, making it ideal for caulking around pipes, repairing underwater leaks, plumbing, and all fastening applications. TVM Building Products. www.bullseal.com.

Jacking frame

The 4812A Guided Boring Machine (GBM) jacks pipe lengths up to 6.6 ft. with a maximum outside diameter of 48 in. Suitable for installing steel casing, vitrified clay, fiberglass-reinforced, and concrete pipe, it's capable of up to 200 tons of jacking force, 100 tons pull-back force, and 20,000 ft.-lbs. torque. Although designed for a 275-hp remote hydraulic power pack, it can also operate with a 100-hp pack. Akkerman Inc. www.akkerman.com.

Concrete cylinder pipe

B-303 bar-wrapped concrete cylinder pipe combines the strength of steel (the cylinder with joint rings) with the corrosion resistance of concrete (the lining). Available in sizes from 10 to 72 in., the pipe is ideal for transmissions mains, distribution feeder mains, treatment plants, intake and discharge lines, and plant piping. Hanson Pressure Pipe, formerly Hanson Pipe & Precast. www.hansonpipeandprecast.com.

Reinforced concrete pipe

The company provides reinforced concrete pipe for pipe-jacking projects involving 84-in.-diameter pipe and microtunneling projects involving inside-pipe diameters from 21 to 54 in. Pipe products include storm sewer pipe, sanitary sewer pipe, PVC-lined corrosion-resistant pipe, and culvert pipe. Other products include reinforced concrete end walls, manholes, catch basins, box culverts, box manholes, and custom structures. American Concrete Pipe Co. www.americanconcretepipe.com.

Clay sewer pipe

Clay pipe is inert, making it less vulnerable than other material to chemicals, and 5 billion linear feet of it is in use nationwide. Because of improved manufacturing techniques that produce straighter and more uniform product, the company expects its pipes to last more than a century. An O-ring compression joint system ensures a self-centering, tight fit that eliminates infiltration by roots, groundwater, and foreign materials. The pipe is well suited for gravity-fed sewers. Logan Clay Products Co. www.loganclaypipe.com.

Polymer cement coating

Cem-Kote FLEX CR provides waterproofing and protection against sulphuric acid formed in sewers, lift pumping stations, and wastewater treatment facilities. Nontoxic and solvent-free, the coating forms a seamless elastic membrane that also resists penetration of carbon dioxide, chlorides, and other chemicals. It can be applied by spray, brush, roller, or trowel. Gemite Products Inc. www.gemite.com.

Centrifugally cast pipe

Centrifugally cast, fiberglass-reinforced, polymer mortar pipe is inherently corrosion-resistant and can last 100 years or longer. Pressure and gravity pipes are available in 18- to 110-in. diameters, plus as tee-base manholes, elbows, and other specialty items to fit. Leak-free, push-together joints reduce installation time and costs. The pipe is suitable for slip lining, jacking, microtunneling, and other trenchless installation methods for new construction and rehab. HOBAS Pipe USA. www.hobaspipe.com.

Related Articles & Links
  • To learn about how infrastructure managers maximized the benefit from trenchless construction, click here
  • Read the article "Eenie, meenie, miney, or mo?" to learn about four rules of thumb for selecting the right application.
  • WEB EXTRAS: TFor more pipe products, visit the "Article Links" page.