Fire protection in the railway industry

In Europe, the fire protection requirements for the railway industry are still regulated by different country-specific norms. Although these norms are bilaterally accepted in part, it is paramount that our gaskets fulfil the requirements of the applicable norms, thus ensuring the applications of Datwyler’s customers also conform.

Fire protection for our customers in the railway industry

Datwyler is a proven supplier of window and door sealing gaskets to renowned and respected manufacturers and suppliers in the railway industry the length and breadth of Europe. In this respect, we have already adopted and applied these standards on your behalf for a great many years during the production and handling of compounds specially adapted and tested according to the country-specific norms. So, Datwyler already makes a significant contribution to meeting your demands in terms of rail traffic safety.

To demonstrate just two examples of how Datwyler meets these country-specific norms with respect to your applications, we draw your attention to the following two paragraphs:

 

DIN 5510-2:2009-05

The DIN 5510-2:2009-05, which is applied in Germany, Switzerland, Austria and China, sets the basic rules of fire protection for rail vehicles and details, in combination with DIN 53438 (S1) and DIN 54837, the fire behaviour of construction materials. The construction materials are ignited with a gas burner and classified according to flammability (S), smoke generation (SR) and drop-forming (ST). A further requirement is the smoke toxicity tested in a test chamber according to DIN EN ISO 5659-2.

NFF 16-101

In France, and partly in Spain, construction materials are classified according to their flammability, divided into different grades from M1 up to M4. During the so called “Epiradiateur Test” the test samples are exposed for 20 minutes at a 45 degree angle to an electrically heated quartz plate with a radiation intensity of approximately 30 kW/m². The resulting decomposition gases of the test sample are given off laterally. This method allows the point of ignition and extinction, flame propagation and fire side effects as dripping and melting off to be determined. In addition, the smoke gas index is measured and the toxicity determined.

The European Union identified this problem and implemented a prevailing norm with the EN 45545. Although the EN 45545 already became effective in August 2013, the country-specific norms will be valid initially.

Fulfilling the very ambitious requirements of this new norm for you demands a great amount of expertise, development work and commitment – a task which we are pleased to take up on your behalf!

Track Superstructure

A spectre is haunting the local transport companies operating DC-powered trams: the spectre of stray current corrosion. Broken water pipes or gas pipes, damage to buildings, rail breaks, false signals, power outages and electric currents that flow in places where they shouldn’t …  are all to blame for this phenomenon of electrochemical corrosion.

Track Superstructure

The less than state-of-the-art condition of DC-operated traffic systems such as tram tracks are often the result of this. As far back as 1834, the British physicist Michael Faraday formulated some of the laws of induction and electrolysis, and discovered electromagnetic induction. His discovery made it possible to understand electrochemistry and to develop technical solutions for the prevention of stray current.

In 1974, the first standard was written which described the protective measures that can be taken against stray current corrosion.

Today, there are approximately 20 international standards and designs, plus a variety of in-house operators’ regulations. These determine the causes and manifestations of stray current corrosion, and the possible protective measures that can be taken against it.

The industry immediately took up this task and over the past few years has developed increasingly effective solutions for the sustainable protection of valuable capital goods and equipment.

Through the conservation of valuable resources, a crucial contribution to environmental protection was provided.

Dätwyler has been engaged with this topic for many years, committed to exploiting the potential of freshly extruded rubber material. In marked contrast to products made from recycled materials, Dätwyler is able to supply extruded rubber in lengths of 15m or 18m depending to the length of the rails, and can even provide uninterrupted lengths of up to 100m. This has the crucial advantage of significantly reducing the number of joints, and thus greatly narrowing the flow of stray current.

Our extensive experience acquired over many years has enabled us to develop bespoke solutions for the insulation of all parts such as joints, turnouts, tie bars and dewatering or switch boxes.

Contact us now for more information - our team of specialists will be happy to advise you in this matter.

Phone: +49 3622 633 200

E-Mail: civilengineering@datwyler.com

Anchored gaskets in Australia

Acceptance amongst our customers of the new anchored gasket technology is growing constantly. Having been successfully applied in several projects both in Europe and America, we are delighted to announce that this technology is now available to our customers in Australia for the first time.

Datwyler’s inaugural tunnelling project with anchored gaskets in Australia

As a first contractor in Australia using this type of gaskets, the joint venture between Thiess-John Holland and Dragados (TJHD  JV) has paved the way by ordering a total quantity of 16,300 sets of anchored gaskets, of the type M385 66 `Lee Tunnel`. The gaskets will be used to seal Sydney’s North West Rail Link (NWRL) project, which will run between Bella Vista and Epping, connecting this part of Sydney to the city. The twin 15 km tunnels, including 8 stations, will be the longest rail tunnels ever built in Australia. Anchored gaskets are gaining increasing popularity among our customers, and are replacing conventionally used gaskets, which are glued into the gasket groove of a prefabricated concrete segment.

To your further advantage the gaskets will now be incorporated into the segments during the precast process, and after curing, the segments are ready for you to use. The time and costs saved at segment manufacturers can then be passed onto you, our end customer. Furthermore, the bonding between segment and gasket is a great deal stronger, providing you with improved security during storage and installation into the tunnel.

This new contract demonstrates how far Datwyler is progressing in addressing the growing demand of our customers for anchored gaskets worldwide.