Optimum system for metro tunnel In addition to efficient fire-fighting performance, the SEM-SAFE® high-pressure water mist system provides several benefits: • The small components are ideal for locations with limited room. Whereas a sprinkler system usually requires the use of 10 or 12-inch pipes, the SEM-SAFE® high-pressure water mist solution uses 4-inch pipes while delivering the required hydraulic performance. • The system uses very little water compared to sprinklers. This reduces the volume of water in the tunnels, making evacuation easier and reducing the need for drainage, and the smaller water tanks reduce installation footprint and cost. • Since the small-diameter pipes can transport pressurised water over long distances, a SEM-SAFE® high-pressure water mist system does not require several pumping stations. On the M11 line, one high-pressure Danfoss pump unit for each tunnel segment is sufficient. System test in Norway As one of the world’s largest manufacturers of high-pressure water mist systems, Danfoss Fire Safety has the experience and expertise to help customers design and build solutions that provide the required protection – even when conditions on the ground, or below it, are not ideal. On the M11 project, Danfoss Fire Safety had several meetings with the customer on how to ensure adequate protection in the absence of escape shafts or tunnels. Guided by design criteria developed by consultants and the Turkish ministry of transport and infrastructure, Danfoss proposed a solution and carried out a live test in Norway. The test was witnessed by external fire system consultants RISE and UL as well as the client, contractors, and the ministry. Based on the successful test, Danfoss designed and delivered the solution for the M11. Solutions for challenging conditions In real-life construction projects, things do not always go according to plan, and designers often need to look for alternative solutions. In Istanbul, the SEM-SAFE® high-pressure water mist system now allows the Istanbul metro system to keep serving a growing number of passengers despite challenging soil conditions. The efficient water-based system is ideal for infrastructure projects where protecting human lives is of paramount importance. Key benefits • Innovative solution ensuring fire safety in challenging underground conditions • Efficient fire suppression safeguarding people and tunnel structures • Minimal water use reducing resource usage and total cost of ownership • Small installation footprint • Virtually maintenance-free • Approved, certified, and environmentally friendly The Danfoss SEM-SAFE® solution provides efficient fire protection for metro tunnels where it was not possible to construct escape routes. SEM-SAFE® high-pressure water mist pump unit SEM-SAFE® high-pressure water mist section valve ® Danfoss Fire Safety A/S · Middelfartvej 9 · DK-5000 Odense · Denmark Tel. +45 7488 7800 · E-mail firesafety@danfoss.com · www.semsafe.danfoss.com Danfoss Fire Safety A/S can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss Fire Safety A/S reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequent changes being necessary in specification already agreed. All trademarks in this material are property of the respective companies. SEM-SAFE® logotype is trademark of Danfoss Fire Safety A/S. Danfoss logotype is trademark of Danfoss A/S. All rights reserved. © Copyright Danfoss Fire Safety A/S | 2024.03
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