- Author
- Underwriters Laboratories, Incorporated
- Title
- Operation Times for Duct Mounted, Corrosion Protected Sprinklers and the Influence of Sprinkler Spray on Heated Air Flow Through Ducting. Report on Special Services Investigation.
- Coporate
- Underwriters Laboratories, Inc., Northbrook, IL
- Sponsor
- HSB Industrial Risk Insurers, Hartford, CT
- Report
- NC 1838; Project 97NK29176, June 5, 1998, 67 p.
- Keywords
- ducts | corrosion | sprinklers | sprinkler spray | air flow | fire tests | quick response sprinklers
- Abstract
- This Report describes a Special Services Investigation to determine operation times for duct mounted, corrosion protected sprinklers and the influence of sprinkler spray on heated air flow through ducting for HSB Industrial Risk Insurers. In no event shall Underwriters Laboratories be responsible to anyone for whatever use or nonuse is made of the information contained in this Report, and in no event shall UL, its employees, or its agents incur any obligation or liability for damages, including, but not limited to, consequential damage arising out of or in connection with the use, or inability to use, the information contained in this Report. Information conveyed by this Report applied only to the specimens actually involved in these tests. UL has not established a factory Follow-Up Service Program to determine conformance of subsequently produced material not bearing the UL Listing Mark nor has any provision been established to apply any registered Mark of Underwriters Laboratories Inc. to such material. The issuance of this Report in no way implies Listing, Classification or Recognition by UL and does not authorize the use of the UL Listing or Classification Marks or any other reference to Underwriters Laboratories Inc. on or in connection with the products not bearing the UL Listing of Classification Marks. The sole purpose of the investigation was to record actuation times and air velocity test data of duct mounted corrosion protected sprinklers for HSB Industrial Risk Insurers. This research project investigated the influence of various methods of corrosion protection on the actuation times of standard and quick response sprinklers. This investigation was conducted using both uncoated and corrosion protected sprinklers mounted in a 12 inch diameter duct under specified test conditions of heating and air flow. This investigation consisted of conducting three tasks which are described as follows: Task 1 - Determine differences in the operating times and apparent Response Time Index (RTI) of Listed sprinklers having fusible link or glass bulb heat responsive elements using a sprinkler sensitivity plunge oven. Task 2 - Determine operation times for standard and quick response sprinklers having various corrosion protection methods inside a 12 inch diameter duct flowing heated air. Task 4 - Determine the influence of sprinkler water discharge on the rate of air flow through the duct.