UL 852-2008 pdf download.Metallic Sprinkler Pipe for Fire Protection Service. 7 Sizes 7.1 Pipe shall be nominal 1/2-inch NPS or larger. 8 Threaded Ends 8.1 Where steel pipe is intended to be threaded, threads shall
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UL 852-2008 pdf download.Metallic Sprinkler Pipe for Fire Protection Service. 7 Sizes 7.1 Pipe shall be nominal 1/2-inch NPS or larger. 8 Threaded Ends 8.1 Where steel pipe is intended to be threaded, threads shall
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