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Laser Profiling
One of the newest techniques in the industry is laser profiling for pipelines. The Florida DOT introduced its requirements for laser pipe testing in May 2006, and a number of other states are considering enacting similar requirements. The new specifications apply to all pipe 48 inches (1200mm) or less in diameter.

The new process is similar to the closed-circuit TV (CCTV) techniques used in the past. A laser profiler is attached to the camera and run through the pipe. As it moves, the laser takes exact measurements of the internal pipe section up to 30 times a second, scanning for size, deflection, non-uniform deformation, offset joints and other potential problems.

How concrete pipe fits the profile
Installing reinforced concrete pipe (RCP) is the best way to meet these demanding standards. It’s rigid, easy to install and designed to last for 100 years or more. All that, plus:

	RCP is more durable than other materials, such as plastic.
	RCP doesn’t sag, tear or buckle.
	With RCP, deflection is not a concern.
	Concrete pipe is easier to repair.
	RCP is versatile enough for almost any application.
	Longer life means RCP is more economical.

Typically, laser profile inspections are conducted by traditional video contractors. By choosing concrete pipe, you can install a defection-free pipeline, reducing the odds of having to correct even minor errors. And that saves contractors time and money.

Meeting the standards
Laser profiling should be conducted in accordance with NASSCO’s Specification Guidelines SG-11. Specific requirements may vary according to state and local regulations.

Mandrel Testing
Post-installation mandrel testing of flexible pipes is required in many areas to ensure proper installation. It is easy, inexpensive and the only means of determining if the contractor has maintained deflection within the required 5 percent of the nominal pipe diameter.

The mandrel is passed through the pipeline to ensure the minimum acceptable internal diameter and shape are maintained throughout the length of the line.

Mandrel testing is typically performed no sooner than 30 days after final backfill, and ideally again just prior to the end of the one-year construction warranty period.

As with laser testing, the bottom line is that rigid concrete pipe is the right choice. It’s stronger, doesn’t deform and outlasts other types of pipe.

It’s simple. Reinforced concrete pipe is able to pass the higher standard for mandrel testing. And it will last longer, be easier to repair and be more cost-effective in the long run.

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