MFRI, Inc. (MFRI) is engaged in the manufacture and sale of piping systems and filtration products. The Company operates in two segments: piping systems and filtration products. The Company engineers, designs, manufactures and sells specialty piping and leak detection and location systems. Piping systems include industrial and secondary containment piping systems for transporting chemicals, hazardous fluids and petroleum products, insulated and jacketed district heating and cooling piping systems for energy distribution to multiple locations from central energy plants, and oil and gas gathering flow and long lines for oil and mineral transportation. It manufactures and sells a range of filter elements for cartridge collectors and baghouse air filtration and particulate collection systems. The principal types of industrial air filtration and particulate collection systems in use are baghouses, cartridge collectors, electrostatic precipitators, scrubbers and mechanical collectors.