Test Method for Actuating and Safety Devices of Portable Fire Extinguishers.211 NORDTEST Project No. 1435-99

摘要

The European standard EN 3-5 defines the maximum force required to release the211u001esafety device and to activate the operating device of portable fire 211u001eextinguishers. The aim of this study is to develop and document a method which 211u001ecould complement the current brief description included in EN 3-5. The study also 211u001ecomprises an assessment of the accuracy of the new method and a proposal for a 211u001eformal Nordtest test method. Chapter 2 of this report presents the requirements 211u001eand methods of measurment for the maximum force required to release the safety 211u001edevice and to activate the operating device of portable fire extinguishers as 211u001edescribed in the European standard EN 3-5 and also in the recently withdrawn 211u001eNordic test method NT FIRE 024. Chapter 3 contains a discussion of various 211u001etheoretical aspects related to measurements of the forces required to operate a 211u001eportable fire extinguisher. Chapter 4 describes the experiment work carried out 211u001ein this study including a description of the test equipment with calibration 211u001emethods and experimental results. Chapter 5 contains a short discussion of the 211u001enew test method. Appendix A presents some common types of actuating and safety 211u001edevices used in portable fire extinguishers. Appendix B contains photographs of 211u001ethe new test device while Appendix C contains the formal proposal for a new 211u001eNordtest test method.