New standard published
Technical Bulletin 64-2024 on Foam Concentrate Proportioning Systems
On October 2, 2024, the updated Technical Bulletin TB 64-2024 was published. This bulletin, titled “Foam Concentrate Proportioning Systems”, replaces the previous TB 64B. With this complete revision, an important step has been taken to clarify and update the application of standards related to foam concentrate proportioning systems in all types of fixed fire suppression systems (VBB systems).
What’s new in TB 64-2024?
TB 64-2024 focuses exclusively on the application of standards and intentionally leaves out more situation-specific issues. Topics explicitly outside the scope of this bulletin include:
Whether foam concentrate proportioning is necessary;
What performance requirements apply to the proportioning system (such as the mixing ratio);
The suitability of the foam concentrate for the applied foam generators.
These aspects are determined by the risk to be protected, the design standard, the requirements of the involved parties, and the type of VBB system.
No impact on the foam transition
TB 64-2024 is separate from the ongoing foam transition, which focuses on the shift from fluorinated to fluorine-free foam concentrates. For any project undergoing this transition, a complete reassessment of the suitability of the VBB system in combination with fluorine-free foam concentrate is required. This reassessment falls outside the scope of the bulletin.
However, the bulletin does become relevant if that reassessment leads to modifications to the foam proportioning system. In such cases, TB 64-2024 provides the guidelines for correct application of the relevant standards.
More information
TB 64-2024 is an essential reference for professionals involved in the design, assessment, or maintenance of foam concentrate proportioning systems. For more information about this bulletin, please refer to the CCV.
Do you have questions about what this bulletin means for your projects and inspections? Feel free to contact Normec FSS.
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