4.12 Integrity of nozzle coatings [6.12]
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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 - 4.12 Integrity of nozzle coatings [6.12]

4.12 Integrity of nozzle coatings [6.12]

Parent topic: 4 Water Mist Nozzle Requirements

4.12.1 Evaporation of wax and bitumen used for atmospheric protection of nozzles (see 5.13.1 )

 Waxes and bitumens used for coating nozzles should not contain volatile matters in sufficient quantities to cause shrinkage, hardening, cracking or flaking of the applied coating. The loss in mass should not exceed 5% of that of the original sample when tested by the method in 5.13.1.

4.12.2 Resistance to low temperatures (see 5.13.2 )

 All coatings used for nozzles should not crack or flake when subjected to low temperatures by the method in 5.13.2.

4.12.3 Resistance to high temperature (see 4.9.3 )

 Coated nozzles should meet the requirements of 4.9.3.

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