Heavy duty external fire doors and fire door maintenance

Heavy duty external fire doors and fire door maintenance Fire doors constitute a heavy duty, fully certified range that covers fire ratings from A0 up to H120 including jet fire requirements. Doors are also able to withstand a blast overpressure (up to 2.5 bar blast).

The fire doors and blast doors will be pre-assembled as complete units and provided with heavy duty special in-house designed hardware. For example, to meet the specific Norsok requirements we have designed a special mechanical opening device that ensures a maximum opening force of 5kg for heavy duty sliding doors.

The door designs are versatile and can be adapted to meet our clients' particular requirements. Early consultation can result in a detailed design best suited to the overall platform design philosophy.

Our door range consists of Lloyds / DNV approved:

• A60 rated single leaf hinged door
• A60 rated double leaf hinged door
• A60 rated single leaf sliding door
• H120 rated single leaf hinged door
• H120 rated single leaf sliding door
• H120 rated double leaf hinged door

Due to our standard automated production, we are able to offer you a door of quality with the most competitive price. Our standard heavy duty doors are called the G21 Fire door and the G21 Blast door.

SSISB supplies, install & commissions a large variety of wall designs, consisting of a bolted wall design and a welded wall configuration. Both systems range from A0 up to H120 fire rating. To complete the range we also have our own design cladding system (blast relief), louvres and heat shields .

Advantages of our wall systems include:

• These wall types comprise a thin-gauged galvanised coil, coated or stainless steel and pre-insulated elements shaped to offer an optimal span to weight ratio, and are bolted to the supporting structure .
  

• The systems quite easily allow for adoptions to deviations at site as no welding or any other hot work or painting is required, therefore they are pre-eminently suited for refurbishment jobs.

• These wall types exhibit optimal weight efficiency by their corrugated shape, which can be engineered to suit any set of boundary conditions with regard to span, loading and available depth.

• The wall systems can easily be accommodated to withstand the specified blast overpressure, they are fully (seal) welded for 100% air, gas and water tightness.
  

Apart from these standard systems regularly modified types are designed to suit specific project requirements that cannot be met with standard systems, such as blast resistance, jet fire requirements etc.

Basically a blast wall can be regarded as a firewall for which an additional functional requirement applies, i.e. that apart from the usual wind loading the walls need to be able to resist a certain blast overpressure.

To extend the favourable characteristics of our systems to blast wall applications with large spans and higher blast loads, a hybrid shape has been developed comprising columns integrated in the wall system at a relatively short spacing (2.0 - 3.0 metre), to carry the blast loads transferred from infill panels. In this hybrid shape discrimination has been made between the load bearing function (hot rolled carbon steel columns) and the separating function, i.e. the infill panels. This 'best of both worlds' solution takes advantage of both the favourable high strength characteristics of hot rolled sections and the light weight, separating and insulating properties of the walls. Especially for walls that are required to have a stainless teel external skin this blast wall is a very competitive structure.

Jet Fire

Just as blast a jet fire resistance specified for a wall can be regarded merely as an additional functional requirement. Therefore basically all our wall systems can be considered in this respect. Jet fires are characterized by a local concentrated heat input that is more severe that the effect of a hydrocarbon fire.