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The 2002 edition of the NFPA #13 standard, section 3.6.1 defines quick response sprinklers as having a response time index (RTI) of 50 (meter-seconds) 1/2 or less. RTI is a measure of how thermally responsive the heat-responsive element of the sprinkler is, measured as the time needed to raise the temperature of the sprinkler bulb to 63% of the ...
Victaulic is a developer and manufacturer of mechanical pipe joining systems, and the originator of the grooved pipe couplings joining system. [1] The firm is a global company with 15 major manufacturing facilities, 28 branches, and over 3600 employees worldwide. Currently, its headquarters is located in Easton, Pennsylvania.
For example, in an office building classified as light hazard, a typical design area would be 1,500 square feet (140 m 2) and the design density would be 0.1 US gallons per minute (0.38 L/min) per 1 square foot (0.093 m 2) or a minimum of 150 US gallons per minute (570 L/min) applied over the 1,500-square-foot (140 m 2) design area.
A common type of this style fitting is a "hex bushing" with a hex head for installation with a pipe wrench. A double-tapped bushing is more compact than a reducer but not as flexible. While a double-tapped bushing has a more minor female thread concentric to a larger male thread (and thus couples a smaller male end to a larger female), a ...
Mechanical fusible links are utilized as the triggering device in fire sprinkler systems and mechanical automatic door release mechanisms that close fire doors in warehouses, etc. Fire dampers in ventilation systems have fusible links so that the dampers close automatically in case of fire, limiting the spread of flame or hot gases through a ...
A crossflow head gives better performance than a Reverse-flow cylinder head (though not as good as a uniflow), but the popular explanation put forward for this — that the gases do not have to change direction and hence are moved into and out of the cylinder more efficiently — is a simplification since there is no continuous flow because of valve opening and closing.
A crosshead as part of a reciprocating piston and slider-crank linkage mechanism. Cylindrical trunk guide Hudswell Clarke Nunlow; crosshead and two slide bars. In mechanical engineering, a crosshead [1] is a mechanical joint used as part of the slider-crank linkages of long stroke reciprocating engines (either internal combustion or steam) and reciprocating compressors [2] to eliminate ...
The standard for DTIs in North America is the ASTM International series of standards and the specific designation for testing and manufacturing DTIs is ASTM F959: Standard Specification for Compressible-Washer Type Direct Tension Indicators for Use with Structural Fasteners. [2]