Design & Planning

Insulation

  • Wall pipe
    The seals in a fire protection bulkhead should preferably be fastened to an overhanging wall pipe using clamps. When planning the fire protection bulkhead, we recommend using norm nominal bores for the wall pipes to the extent possible. The overhang should be 30 mm for membranes and 60 mm for expansion joints.

    The required distance between individual wall pipes shall be:
     ≤ 200 mm a ≥ 100 mm
     > 200 mm a ≥ 200 mm


     

  • Sectional medium pipe insulation
    The insulation of a pipeline not only protects it against heat, cold and noise, but also actively contributes to structural fire protection. Depending on the diameter and wall thickness of the pipeline, it may have to be equipped with external insulation in the area of the wall or ceiling duct. This sectional medium pipe insulation should be made from non-flammable rock wool in materials class A1 with a melting point greater than 1000 °C. Standard pipe shells or rock wool mats are commonly used. If other insulation materials are used, e. g. closed-cell foamed plastic or foam glass, pay attention to the manufacturer’s Building Supervisory certifications. 

    In principle, the pipeline insulation needs to be designed such that fire and smoke cannot spread to the side facing away from the fire. The surface of the insulation should be shielded throughout using galvanized steel or stainless steel plates at least 0,8 mm thick. If using sectional medium pipe insulation, the front faces should also be covered with sheet metal. Circular and longitudinal joints should be designed in the form of corrugations, and should be secured using Parker screws (distance  ≤ 150 mm), straps or clamp lever fasteners.


     

  • Sectional medium pipe insulation for ceilings
    For ceiling ducts, the sectional medium pipe insulation should be secured against slippage by appropriate actions. For example, the insulation can be stayed using steel belt clamps (B) before fitting the steel plate sheathing. If the sectional medium pipe insulation consists of several parts, the clamp (B) must be fitted below the seam (A). For large diameters (> 400 mm), the medium pipe insulation should be reinforced in the fastening area of the wall or ceiling sealing membrane or the wall or ceiling sealing expansion joint. For instance, additional sheet metal strips can be installed there between the insulation and the surface shield.
     
  • Brackets for ring gap insulation in ceiling ducts
    For ceiling ducts, the ring gap insulation between the medium and wall pipes must be supported using several additional brackets around the circumference. Otherwise there is a risk that the ring gap insulation will slip during a fire. When designing the bracket layout, the lateral movement of the medium pipe must be taken into account. The bracket angles should be made using galvanized or stainless steel and must have a thickness of at least 0.75 mm.