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.
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.
(48496 K)
Underwriters Laboratories, Incorporated
NC 1838; Project 97NK29176; 67 p. June 5, 1998.
Sponsor:
HSB Industrial Risk Insurers, Hartford, CT
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.
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