pipe schedule

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pipe schedule (sprinkler) system

A fire sprinkler system in which the sizing of the pipes supplying the sprinklers is determined from a schedule based on occupancy classification; a specified number of sprinkler (heads) may be supplied for a specific size of pipe.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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Use can reduce, from at least six to only two, the number of testers needed to test an entire range of pipe schedule, while catering for variations in diameter and excessive weld penetration.