In 1961 PERMA-PIPE was started as a division of the Midwesco Company in Chicago to manufacture steam and condensate piping systems for the District Heating Industry. Since that time, PERMA-PIPE has become the largest manufacturer of specialty piping systems for secondary containment and district heating and cooling in the United States, and a Global Leader operating six (6) manufacturing plants worldwide serving not only District Heating and Cooling, but also Oil & Gas and Industrial & Environmental applications. PERMA-PIPE became a public company in January of 1994 as a subsidiary of MFRI, Inc. and is traded on the NASDAQ National Market under the symbol MFRI.
From its start in 1909 through 1993, Ricwil Inc.manufactured district heating and cooling systems and heat traced piping systems as the brand-name leader in the preinsulated piping industry. In 1994, PERMA-PIPE acquired* Ricwil. The acquisition merged years of design expertise and proven products to satisfy the expanding needs of PERMA-PIPE's customers.
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