Accession Number : ADA373266


Title :   Evaluation of Reflexive Valve Logic for a Shipboard Firemain


Descriptive Note : Interim rept. 1998-1999


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC


Personal Author(s) : Durkin, Arthur ; Williams, Frederick W ; Lestina, Tom ; Bradley, Melissa ; Downs, Ryan


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a373266.pdf


Report Date : 12 Jan 2000


Pagination or Media Count : 65


Abstract : The evaluation of valve logic, which automatically detects, locates and isolates damage to a shipboard firemain is discussed. Based on a review of commercial leak detection technology and shipboard firemain damage response requirements, low pressure, hydraulic resistance, flow inventory and rupture signal detection logic methods are investigated. For low pressure and hydraulic resistance logic methods, setpoints and closure sequences are described and tested using a benchtop model of an offset loop firemain. For flow inventory logic, commercial pipeline leak detection technology is evaluated along with results from a preliminary shipboard firemain demonstration. Rupture signal detection methods are discussed along with potential applications for shipboard fluid systems. Application of logic based on hydraulic resistance is recommended for Navy firemains. The recommended method can detect, locate and isolate the rupture without isolating intact sections and without the need for communication following damage.


Descriptors :   *SHIPBOARD , *PIPING SYSTEMS , *CUT OFF VALVES , FIRE FIGHTING , LEAK DETECTORS , BOAT AND SHIP SAFETY , DAMAGE CONTROL , BYPASS VALVES , HYDRAULIC VALVES


Subject Categories : Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
      Hydraulic and Pneumatic Equipment
      Marine Engineering


Distribution Statement : APPROVED FOR PUBLIC RELEASE