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Envirograf Intumescent Pipe Collar for up to 4 hours protection


A hinged, two-part metal collar lined with intumescent material which expands in a fire. It has a quick-release pin to open the unit for fitting around a wide variety of metal or plastic pipes and cables.

The collars provide 1, 2 and 4 hours protection to pipes from 45mm to 650mm diameter.

The intumescent lining stops the penetration of heat, fire, fumes and smoke.

Tested with HDPE pipes to BS476 Parts 20 & 22 (1987), giving up to 4 hours integrity.

Tested for nuclear power stations resulting in 2 hours of protection.

Tested to European standards EN1363/1 (2000) and EN1366/3.

Envirograf Product 13 

£14.89 (excl VAT)
Fire Rating
  • 1 Hour
  • 2 Hours
  • 4 Hours
Internal Pipe Diameter

About Intumescent Pipe Collar

  • Pipe diameters up to 200mm, collars are 30mm, 40mm or 50mm deep depending on fire rating.
  • Pipe diameters 225 mm to 300mm, collars are 60mm or 100mm deep depending on fire rating.
  • Pipe diameters 50mm to 650mm, collars are 80mm or 150mm deep depending on fire rating.

Application Instructions

Prior to fixing, please ensure:

  • Access for fitting is available
  • Correct area of risk is assessed (double-risk areas may require two collars
  • Correct size of collar appropriate to the pipe or service being protected

(See also Envirograf Product 110 for hollow wall fixing).

The product must be installed correctly. Fixing lugs are already fitted to WPCS collars.

They can be fixed to solid structures with raw plugs with screws. It is recommended that you apply a spot of Envirograf product 58 (intumescent Mastic) into the previously drilled hole.

For hollow plasterboard walls, fix with screws if there are timber noggins to fix to, otherwise use steel toggle fixings. If WPCS are to be fitted into an area where no noggins or blockwork to attach to, the lugs can be re-attached to another part of the WPCS by drilling 1.5mm holes into the side of the collar and screw into collar. WPCS’s MUST be securely fixed.

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