Caswell Fire Resisting Ductwork
Caswell Firesafe

CORE SPECIFICATION. WHAT FORM DOES CASWELL FIRESAFE® DUCTWORK TAKE?

CASWELL FIRESAFE® fire resisting ductwork is available to BS476:Part24 or EN1366:Parts 1 & 8.
In both cases it has 3 fundamental elements:

CONSTRUCTION      SHAPE      MATERIAL

Each of these categories is split into

CONSTRUCTION
NON-COATED STANDARD
NON-COATED & INSULATED
NON-COATED FULLY WELDED

SHAPE
R – RECTANGULAR
C – CIRCULAR

MATERIAL
MS – MILD STEEL
GS – GALVANISED STEEL
SS – STAINLESS STEEL

CASWELL FIRESAFE® to BS 476:Part 24 –  KEY SPECIFICATION

CASWELL FIRESAFE flame logo

  • Rectangular duct up to 3000 mm x 3000 mm
  • Circular duct up to 1250mm diameter
  • Special panel construction ducts up to 8m on the longest side
  • Horizontal and vertical orientations
  • Mild Steel, Galvanised Steel & Stainless Steel construction
  • Conventional or Fully Welded ‘Grease Tight’ construction
  • Test evaluation for ‘Fire Outside’ & ‘Fire Inside’ scenarios
  • High-temperature balancing dampers
  • Fire rated Access Doors (Insulated and Uninsulated)
  • Fire rated Silencers
  • Bespoke design for ductwork support systems
  • Insulation systems rated from 30 minutes up to 240 minutes

CASWELL FIRESAFE® to EN1366-1&8 – PLEASE CONTACT US TO DISCUSS KEY SPECIFICATION  

Product Reference

How is a CASWELL FIRESAFE® Product Reference created?
The CASWELL FIRESAFE® product reference defines the specification for fire resisting ductwork. It is created by choosing the specific combination of attributes required from the many permutations available.

Nomenclature is built up using these 7 classifications:

  1. CASWELL FIRESAFE – All references start with CF for CASWELL FIRESAFE®
  2. BRITISH STANDARD – Test accreditation i.e. BS for Tested and Assessed to British Standard BS 476 : 24 (1987)
  3. STABILITY & INTEGRITY – Duration in hours i.e. 4 defines the required Stability & Integrity fire performance
  4. INSULATION – Insulation (if required) has 10 options using codes 01 to 10. If no insulation is needed then the code should be entered as 00
  5. MATERIAL – Material from which the ductwork is made. Either Mild Steel – MS, Galvanised Steel – GS or Stainless Steel – SS
  6. CONSTRUCTION – Construction type. There are 5 options coded 01 to 05
  7. SHAPE – The shape of the ductwork. Either Rectangular R or Circular C

See the CASWELL FIRESAFE®  Product Data Sheet for more information including all options for 4. Insulation and 6. Construction.

CASWELL FIRESAFE® to EN1366-1&8.
We use the EN classification coding from BS EN13501-3 (Fire Resisting Ventilation) and BS EN13501-4 (Smoke Control). Please contact us to discuss your needs  

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