4.7 Strength of release element [6.7]
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Statutory Documents - IMO Publications and Documents - Resolutions - Assembly - IMO Resolution A.800(19) – Revised Guidelines for Approval of Sprinkler Systems Equivalent to that Referred to in SOLAS Regulation II-2/12 – (Adopted on 23 November 1995) - Appendix 1 - Component Manufacturing Standards for Water Mist Nozzles - 4 Water Mist Nozzle Requirements - 4.7 Strength of release element [6.7]

4.7 Strength of release element [6.7]

Parent topic: 4 Water Mist Nozzle Requirements

4.7.1 Glass bulbs (see 5.9.1 )

 The lower tolerance limit for bulb strength should be greater than two times the upper tolerance limit for the bulk design load based on calculations with a degree of confidence of 0.99 for 99% of the samples as determined in 5.9.1. Calculations will be based on the normal or gaussian distribution except where another distribution can be shown to be more applicable due to manufacturing or design factors.

4.7.2 Fusible elements (see 5.9.2 )

 Fusible heat-responsive elements in the ordinary temperature range should be designed to:

  • .1 sustain a load of 15 times its design load corresponding to the maximum service load measured in 5.3.1 for a period of 100 h in accordance with 5.9.2.1; or

  • .2 demonstrate the ability to sustain the design load when tested in accordance with 5.9.2.2.

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