Clean Harbors has announced new untethered ultrasonic smart pigs to inspect fired heater tubes and small diameter pipelines. The company has miniaturized and advanced a technology that was previously available only for larger diameter pipelines or had limited data storage capabilities. The new technology supports petroleum, refinery, chemical, paper and other process manufacturing operations. The smart pig inspects straight lines and navigates short radius one diameter bends in process heaters and plant lines. It inspects up to Schedule 160 pipe in a variety of metallurgies, including but not limited to stainless steel, chromes and standard carbon steel configurations. Vacuum-style fired heaters with multiple pipe diameters can be inspected in addition to hard-to-reach convection sections. The tool operates in several liquid media, but is normally run in water at ambient temperature. The smart pig samples 360 degrees of up to 12mi of tube wall (using one battery pack) at a rate of 2400 samples/second with a travel velocity of one-two feet/sec and a travel measurement resolution of 1.4in. Its custom-designed transducer produces A, B and C scan data, as well as 3-D color-coded representations of wall thickness. It identifies corrosion and erosion for continued monitoring or replacement and takes radial data measurements to prove tube cleanliness. It also records denting, ovality and pipe and tube swelling.