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New words:
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Removed:
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EXHIBIT 21.1
NORTHWEST PIPE COMPANY
SUBSIDIARIES OF THE REGISTRANT
Permalok Corporation, Missouri
Thompson Tank Holdings, Inc., Oregon
North American Pipe Fabricators, Mexico
NWPC, LLC, Delaware
WTG Holding U.S., Inc., California
Bolenco Corporation, California
NOV Ameron de SLRC, S de RL de CV, Mexico
NOV Ameron de Mexico, S de RL de CV, Mexico
Rio Co., S de RL de CV, Mexico
Corporacion Californiana de Tuberias APS, S de RL de CV, Mexico