MSHA approved fan assemblies that incorporate pipe nipple extensions.

Bibliographic Details
Corporate Author:	United States. Mine Safety and Health Administration
Format:	Government Document Book
Language:	English
Published:	[Arlington, Va.] : [U.S. Dept. of Labor, Mine Safety and Health Administration], [2006]
Series:	Program information bulletin ; no. P06-06.
Subjects:	Mines and mineral resources > United States > Equipment and supplies.
Online Access:	https://purl.fdlp.gov/GPO/LPS93734

Available Online