The History of The IT3 System

About IT3 Multiwall System

Since 1968, Mr. Tierling has been dedicated to the engineering, development, and installation of its patented multiwall system, IT3, which eliminates galvanic corrosion problems and meets the necessary requirements of the petroleum, mining, and power line industries regarding double-wall containment.

PPT has installed its IT3 system in numerous climates and terrains across the American continent, including the North Slope of Alaska, the streets of New York City, the Bahamas, California, and Peru, among others. The system operates with all types of fluids such as crude oil, oil, gas, water, slurry, and multi-phase systems with pressures ranging from vacuum to 3500 PSI. Additionally, the PPT IT3 system has developed projects in areas where endangered species are found, thus ensuring the system's ability to protect the environment.

The IT3 Multiwall System Technology

PPT's design focused on the proposed fusion of three materials (IT3), sliding a corrosion-resistant lining inside a stronger metal tube; thus providing a material option that contains chemical and mechanical properties resistant to corrosion.

The important art and science of the procedure consists of controlling the flow characteristics and properties of a non-Newtonian fluid, the cement slurry, to ensure complete continuity of the stress transfer mechanism. Our patented techniques, based on decades of experience, are the only ones known to make a very high success rate.

PPT engineers determine the selection of the internal lining material (fiberglass reinforced plastic, polyethylene, polybutylene, ceramics, PVC, etc.). These are chosen for their high corrosion resistance and excellent flow characteristics. The coating must also adapt to present and future operational demands.

The cement slurry, its design and mixture is exclusive to the IT3 system. The cement injected into the annular space confines the lining, managing to join the lining with the outer tube.

Evolution of the IT3 System

Global Implementation

Over its 44+ years in the hydrocarbon industry (Gas & Oil), PPT has designed and executed more than 65 projects in different parts of the Americas including North America, Central America, South America, and the Caribbean. The pipelines constructed with PPT's IT3 system to date are operating maintaining their integrity and without degradation over time, resulting in operations conducted with Confidence, Safety, and Effectiveness.

Notable installations include:

• Prudhoe Bay, Alaska - North Slope (1982)
• New York City streets - East River and Astoria (1993-1997)
• Grand Bahamas in the Bahama Islands (1980)
• California - Multiple locations (1976-2005)
• Peru - Multiple coastal locations (2007-2013)
• Chile - Arica (2012)
• Texas - Multiple locations (1973-1984)
• Canada - Multiple provinces (1971-1975)

The IT3 System has been successfully implemented in various applications, handling fluid streams and multiphase systems with pressures ranging from vacuum to 3500 psi. This remarkable versatility has made it the preferred solution across multiple industries, including oil, gas, chemical, mining, power utility, and municipal infrastructure.