UL-331 › Historical Revision Information
Standard for Strainers for Flammable Fluids and Anhydrous Ammonia
Standard for Strainers for Flammable Fluids and Anhydrous Ammonia
Document Number
UL-331
Revision Level
8TH EDITION
Status
Superseded
Publication Date
Feb. 25, 2008
Page Count
28 pages