5 Water-Mist Nozzle Marking
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC/Circular.1165 – Revised Guidelines for the Approval of Equivalent Water-Based Fire-Extinguishing Systems for Machinery Spaces and Cargo Pump-Rooms – (10 June 2005)Amended by MSC.1/Circular.1237Amended by MSC.1/Circular.1269Amended by MSC.1/Circular.1386 - Annex - Revised Guidelines for the Approval of Equivalent Water-Based Fire-Extinguishing Systems for Machinery Spaces and Cargo Pump-Rooms - Appendix A - Component Manufacturing Standards of Equivalent Water-Based Fire-Extinguishing Systems - 5 Water-Mist Nozzle Marking

5 Water-Mist Nozzle Marking

Parent topic: Appendix A - Component Manufacturing Standards of Equivalent Water-Based Fire-Extinguishing Systems

5.1 General

 Each nozzle complying with the requirements of this Standard should be permanently marked as follows:

  • (a) trademark or manufacturer's name;

  • (b) model identification;

  • (c) manufacturer's factory identification. This is only required if the manufacturer has more than one nozzle manufacturing facility;

  • (d) nominal year of manufacturefootnote (automatic nozzles only);

  • (e) nominal release temperaturefootnote; and

  • (f) K-factor. This is only required if a given model nozzle is available with more than 1 orifice size.

In countries where colour-coding of yoke arms of glass bulb nozzles is required, the colour code for fusible element nozzles should be used.

5.2 Nozzle housings

 Recessed housings, if provided, should be marked for use with the corresponding nozzles unless the housing is a non-removable part of the nozzle.

Figure 1 RTI and C Limits for Standard Orientation

Figure 2 Impact Test Apparatus

Figure 3 Clogging Test Apparatus
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