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Other Fixed Fire Extinguishing Systems

Foam and powder are two other fixed extinguishing systems that are available and will suit certain applications. Foam systems are used for areas where flammable liquids and/or plastics are handled and stored. Foam forms a blanket over the surface of flammable liquids to extinguish the fire. Foam may also be used to enhance watermist and waterspray systems.Typical applications include; flammable liquid hazards; storage tanks and bunds; warehousing (foam enhanced sprinklers); process areas (foam enhanced waterspray); machinery; aircraft hangers and flammable liquid transport.Powder fire protection systems are used in areas where ordinary combustibles, electrical hazards, flammable or combustible materials may be present but which are not normally occupied. Applications include turbines; hydraulic machinery and engines; flammable liquid handling; storage of liquid natural gas pressure relief valves; and manifolds.

Gaseous Fixed Fire Extinguishing Systems

Generally two types of gaseous fixed fire extinguishing systems are available for normally manned enclosures:

• Oxygen reduction systems that use inert gases such as Argon, CO2, Nitrogen or a combination
• Gaseous clean agent systems that cool and breakdown the chemical reactions in fire

Oxygen reduction systems aim to prevent a fire occurring in a protected area. The oxygen level would usually be reduced to below 15Vol % content (normal air contains 20.9Vol %) but different oxygen levels are used for different applications. These systems are normally used in IT server rooms, archive storage areas, warehouse or cold stores, and laboratories. These areas are normally unmanned but entry for short periods, up to about 4 hours, will be possible.

Clean agent systems include gases such as FM200, Novec 1230, Halotran HB, NAF SHFC125 and FE13. Due to environmental issues, these gaseous clean agent systems have replaced halon 1301 as an extinguishing agent. Gaseous extinguishing systems should be installed by companies certified to LPS1204 third party certification schemes, which prove their competence in that area.

Gaseous clean agent fire extinguishing systems are used for computer rooms and EDP; indoor transformers and switchgear; telecommunications, generators; engine and turbine enclosures, and flammable liquid stores. CO2 systems are used for areas where, electrical hazards, flammable or combustible materials may be present but which are not normally occupied.

Typical applications include turbines, machinery, silos switchgear and similar electrical hazards. Generally gaseous fire protection systems are operated by specific automatic fire detection systems in which detector provision and spacing is configured to give very early detection. Usually a “double knock” activation of two detector heads is necessary to discharge the gas. A warning is normally given in the protected area before the gas discharges to allow personnel to leave the area.

Fire Safety Maintenance Checklist

We have produced an example of a Fire Safety checklist for premises.

Goto the Resources Section for more info

Responsible Person

Under the Fire Safety Order the ‘Responsible Person’ for each premises is required to carry out a fire risk assessment and take steps to reduce or remove fire risks. Businesses no longer need a fire certificate and fire certificates are no longer be valid, Enforcing Authority Inspections will continue and evidence of the fire risk assessments will be required. The‘Responsible Person’ is the person/s who owns or controls the business. This is also the owner of the property. If the two are different they must share responsibility and are obliged to co-operate.

Types of lighting systems

There are three main kinds of emergency lighting systems;

  • non-maintained – lamp only illuminates in the event of mains failure to the luminaire
  • maintained – allow the emergency lamp to be operated at any time from the local supply to provide normal lighting but in the event of a power failure to the luminaire, it will illuminate the lamp from its dedicated battery back up power source
  • combined – multi-lamp luminaires where the emergency lamp can be operated in a non maintained or a maintained mode

The required operating duration for emergency lighting varies according to the use of the building and can vary from a minimum of one hour to three hours depending on the requirements of the building or the activities taking place within the premises.

Requirements

  • To adequately illuminate designated escape routes
  • To provide sufficient illumination in other areas to allow safe movement towards and through escape routes
  • To ensure that all fire alarm call points, fire fighting equipment and other safety equipment can be readily located and used
  • To provide sufficient light to enable proper shut down procedures to be carried out in dangerous or high risk areas

Wireless Alarm Devices

The Hyfire wireless alarm devices offer both Audio, Visual and combined units to provide a warning solution to most applications. Both the Audio and visual products come in both a wall mounted or base mounted option. Colour variants and weatherproof options are also available.

Wireless Field Devices

The Hyfire range of field devices is the most comprehensive available today. All field devices are fully intelligent and Compatible with all Hyfire loop translators, expander modules. Powered by standard lithium batteries these wireless devices are pleasing to the eye with the same look and feel as a standard wired product.

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