Perma-Pipe International Holdings, Inc. designs, engineers, manufactures, and sells specialty piping and leak detection systems. It offers insulated and jacketed district heating and cooling piping systems, primary and secondary containment piping for chemicals, hazardous fluids, and petroleum products, as well as coating and insulation for oil and gas pipelines. The company also provides leak detection products, heat trace products, containment systems, custom fabrications, and related technical support, field service, and logistics. Formerly known as MFRI, Inc., it changed its name to Perma-Pipe International Holdings, Inc. in March 2017. Founded in 1909, it is headquartered in The Woodlands, Texas, and operates in the United States, Canada, the United Arab Emirates, Saudi Arabia, and internationally.