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Durasteel System Types

Low Radiation Fire Walls

Durasteel can be built into a low radiation fire wall solution for systems that require a high degree of stability, integrity and insulation as measured upon the unexposed surface of the wall is not critical, but where heat radiation from exposed to unexposed face could be of importance. Durasteel low heat radiation walls offer a lightweight construction, which is very narrow across its thickness. Used in conjunction with the Durasteel pallet racking fire barrier system, this wall offers increased warehousing space and allows for racking to be placed practically against the Durasteel wall itself. Single layer Durasteel fire walls can be constructed using framing of either steel channels, Tee sections or back to back angle sections. The type of framing system and the dimensions of the steel sections will depend on the performance requirements of the wall in terms of wind load, fire performance, impact resistance etc. In instances such as these, Durasteel walls are of a bespoke design.

Fire Wall

Protected Zones, Spandrel Panels & Smoke Screens

Smoke kills more people in fires than heat, flames or structural collapse. It is therefore recognised that occupant safety in a fire can be greatly improved by providing an efficient smoke extraction system. Part of an engineered smoke control system may involve the provision of smoke reservoirs, the use of smoke channelling screens and smoke curtains. Testing standards for smoke control equipment smoke curtains and screens shall meet the requirements of BS 7346: Part 3: 1990, which requires the screen to withstand a fire temperature of 600°C +/-20°C for a minimum of 30 minutes. Durasteel has been tested to the criteria of BS 476: Part 20, with its much higher exposure temperature requirements and it provided a performance in excess of 240 minutes. Durasteel barriers can also be used in position as horizontal "wings" (protected zones) at the head and to the sides of fire walls, forming an added "band" of protection at the junction with other substrates (as detailed in the FPA Design Guide Supplement 2004). This makes it exceptionally difficult for fire to breach a roof and thus leap over the top of, or around, the fire resistant wall system. Durasteel can also be used within spandrel panel systems, positioned at the end of floor slabs in order to prevent fire bridging gaps between floor slabs and curtain wall systems.

Fire Protected Zones

Valve Protection Enclosures

The ability to isolate storage areas or to direct highly combustible fuels away from a heat source through a series of protected valves is paramount in the event of fire. When subjected to high temperatures, the plastic parts of a valve can easily be rendered inoperative, resulting in the valve’s inability to divert or arrest flow. Durasteel can offer different methods of protection for valves, dependent on the requirement. In certain circumstances, it may be sufficient to protect the valve with a fire resistant shielding. In other cases, a more substantial form of protection may be required. In these circumstances, the valve can be fully enclosed within a Durasteel valve actuator box. These boxes have been designed to ensure the valve temperature cannot rise by more than 30°C in 15 minutes, or 30°C in 30 minutes, depending on the type of Durasteel protection applied.

Valve Protection Enclosures

Insulated Fire Walls

Fire walls for construction where high insulation as well as stability is required during a fire. Durasteel insulated fire walls are designed to prevent the passage of heat from a fully developed fire on the exposed face. The maximum permitted temperature rise allowable on the surface of the unexposed face is 140°C as a mean temperature over all the surface, or a maximum temperature rise of 180°C at any one point over all the surface. Insulated wall constructions should be used in areas where the following may occur:

  • Escaping personnel or fire fighters may have bodily contact with the wall surface.
  • If used as a wall lining to any escape route, for instance as an access tunnel within a factory.
  • If there are any volatile chemicals or materials stored within the vicinity of the fire wall and which may ignite at low temperatures.
  • There is a need to improve compartmentation beyond simple integrity.
There are a number of methods of constructing insulated wall systems. Each option has its own benefits. The type of system, thickness and density of the rock wool and cover strips, if required, are all dependent on the fire and physical performance required from the system.

Insulated Fire Wall

Blast Walls

Designed specifically to protect personnel and equipment from the effects of explosion, fire, impact, and the effects of smoke and fumes in hazardous environments, such as offshore platforms, petrochemical installations, chemical plants, military establishments, civil defence works and hazardous process plants. Additional features of Fireblast® fire and blast resistant walls:

  • Blast resistant, tested from 0.3 to 2 bar over pressure.
  • Resistant to hydrocarbon fires, tested to H120.
  • Impact resistant to 4000J after 180 minute fire test.
  • High energy absorption.
  • Hose stream resistant to a 5 Bar high pressure hose
In accordance with DIN 4102 Parts 2 and 3 requirements. Unlike many fire and blast resistant materials, Durasteel is non-combustible and will withstand an explosion followed by a prolonged fire and still be unaffected by hose stream fire fighting. Its integrity remains unimpaired, ensuring continued protection against fire, impact and moisture as well as preventing the escape of smoke and toxic gases. Durasteel systems are tested up to H120 fire rating, and the systems can be designed to suit specific project performance requirements. All Fireblast® walls are individually tailored to suit specific project performance requirements, please consult the Promat Technical Services Department for specification and construction details.

Transformer Barriers

Transformer Barriers are essential in providing protection to life, property and infrastructure when there is a risk from transformer failures and explosions. Transformers are an integral part of electrical distribution and can explode or catch fire without warning. When a fire or explosion occurs, the damage and costs of clean up and repair can be colossal. The risks involved has resulted in insurance companies demanding added protection to areas housing transformers. Invicta Durasteel's individually designed barriers are the answer as confined space and access restrictions rule out alternative products. Durasteel barriers are lightweight, quick to install and offer significant cost savings.

Transformer Barriers