Since their introduction some five years ago, Halon 1301 systems have become established as a safer alternative to C02 systems. Although Halon is basically similar to carbon dioxide in its application and storage, its extinguishing action is different being due to a chemical interruption of the process that produces combustion. IMCO has drawn up guide lines designed to cover the minimum requirements for the different types of system available. The quantity of Halon 1301 is calculated to provide a minimum concentration of 4.12% by volume based on the gross volume of the space protected. The maximum concentration should not exceed 7% by volume of the net volume so as to ensure that in the event of accidental discharge, personnel would not be exposed to possibly unsafe levels. Discussing discharge systems, reference is made to the Central Bank System of which the Kerr Type 9105 is a typical example. The Halon is stored in high-pressure steel cylinders to BS 5045 superpressurised with nitrogen to 43 bar. Each cylinder is fitted with a pneumatically-operated discharge valve connected by a flexible high-pressure hose assembly through a stub pipe to a high-pressure manifold. The cylinders can be released simultaneously from a master control box and from a box in the storage room. Small module systems have been developed for the protection of such spaces as lamp and paint rooms. Order from BSRA as No. 49,536.

  • Availability:
  • Corporate Authors:

    Fuel and Metallurgical Journals Limited

    Queensway House, 2 Queensway, Redhill
    Surrey RH1 1QS,   England 
  • Authors:
    • Hobbs, A
  • Publication Date: 1978-8

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00188716
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Feb 27 1979 12:00AM