EX-21 6 exhibit21subsidiaries10k20.htm EXHIBIT SUBSIDIARIES
Exhibit 21
SUBSIDIARIES OF REGISTRANT
7720 Lehigh Property, LLC (Illinois corporation)
Boe-Therm A/S (Denmark) - sold February 28, 2014
MFRI Holdings (B.V.I) Ltd (British Virgin Islands)
MFRI Luxembourg S.A. (Luxembourg)
Midwesco Filter Cicero, LLC (Illinois corporation)
Midwesco Filter Resources, Denmark A/S (Denmark)
Midwesco Filter Resources, Inc. (Delaware corporation)
MN Niles, In c. (Delaware corporation)
Nordic Air Filtration A/S (Denmark)
Perma-Pipe, Inc. (Delaware corporation)
Perma-Pipe Canada, Inc. (Delaware corporation)
Perma-Pipe India Pvt. Ltd. (India)
Perma-Pipe International Co. LLC (Delaware corporation)
Perma-Pipe Middle East FZC (United Arab Emirates)
Perma-Pipe Oil Field Services LLC (United Arab Emirates)
Perma-Pipe Saudi Arabia, LLC
TDC Filter Manufacturing, Inc. (Delaware corporation)
TC Niles, Inc. (Delaware corporation)