Aden M&E PTE LTD

About Aden M&E PTE LTD

GAS PIPE FR BOX-UP Riser Pipes (Singapore only)

The Fire Safety Bureau of Singapore requires that piping for a rising main is adequately protected to prevent collapse and reduction of water pressure at the point of water egress in the event of a fire. In addition, fire will heat up the water conveyed through the piping system. It is conceivable that water in the pipe could reach a stage of boiling. This would result in additional pressure being placed upon the pipe system as water will expand considerably (1:1700) as it turns to steam. This will result in premature failure of the pipes and joints transporting the water, leading to a loss of pressure and consequential inability to fight or extinguish the fire.

Therefore it is required that rising main piping is adequately protected to:
• Prevent collapse of the piping system,
• Maintain the fire integrity and insulation of the compartment wall or floor where the piping penetrates,
• Prevent water passing through the piping system from reaching its boiling temperature. The temperature at any point on the pipe external surface, measured on the fire-exposed side, must not exceed 75°C above the initial temperature for at least the first 30 minutes of exposure to fire

GBS-Promatect H Typical Drawing

About Aden M&E PTE LTD

Building Services & Enclosure Support

The hangers used to support the building services enclosure must have tensile and bending stresses not exceeding 15N/mm2, 10N/mm2 and 6N/mm2 for fire ratings of up to 60, 120 and 240 minutes respectively. If these stress levels are exceeded then the size of the hanger members must be increased or, alternatively, the spacing of the hangers reduced. The fixings used to fasten the threaded hanger rods to concrete soffits must be all-steel expanding anchors with at least 80mm penetration into the concrete of at least 40mm for 120 minutes fire resistance and 60mm for 240 minutes fire resistance. The anchors must match the size of the threaded rods, be of sufficient strength to support the weight of the enclosure and be fitted in accordance with the manufacturer’s specification. When the hanger rods are suspended from protected structural steel beams, the rods must be protected for at least 300mm from the beams with the same levels of protection as the structural beams.

Four-sided steel channel collars are positioned at approximately 1220mm centres to support the boards. The steel channels are of minimum size 50mm x 50mm x 0.9mm thick or 50mm x 25mm x 0.5mm depending on the system specification

GBS pipe box-up Statement for Ductwork