Intumescent Pipe Collar by Envirograf

Availability: In Stock


Intumescent fire collars are used on pipes passing through walls and barriers to help prevent / delay the spread of smoke and fire. In the event of a fire, the the fire collars ‘intumesce’ or expand, crushing plastic and thin metal pipes in order to prevent or delay smoke or fire spreading. When used on copper or steel pipes, the intumescent pipe collars act as a heat sink to dissipate heat away. The Envirograf intumescent fire collar is 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.

For protection times and sizes please see section below, or contact us on 01752 690997.


Envirograf WPCS Pipe Collar

Envirograf Pipe Collar Sizes and References

Please follow this table to identify which Envirograf Pipe Collar would be most suitable for you.

Pipe Reference Maximum Pipe Size Internal Diameter (mm) Pipe Size External Diameter (mm) External Collar Diameter (mm)
WPCS 45 45 47 59
WPCS 55 55 57 69
WPCS 65 65 74 86
WPCS 75 75 87 103
WPCS 100 100 117 137
WPCS 127 127 137 161
WPCS 150 150 167 195
WPCS 175 175 187 219
WPCS 200 200 212 248
WPCS 225 225 237 273
WPCS 250 250 267 311
WPCS 300 300 317 369
WPCS 350 350 365 421
WPCS 400 400 422 486
WPCS 450 450 487 563
WPCS 500 500 527 607


Due to its heavy duty nature, the Envirograf Pipe Collar is ideal for use in industrial buildings.

The acoustic version offers both airborne and impact sound protection.

Adjustable brackets allow for fitting in hard-to-access areas.

2 hour protection collars: 45mm, 55mm, 65mm, 225mm, 250mm, 300mm, 350mm, 400mm, 450mm and 500mm collars

1 hour protection collars: 75mm, 100mm, 127mm, 150mm, 175mm, and 200mm

Other options and sizes may be available, please contact us to discuss. 

How do you apply the Envirograf Pipe Collar?:


  • 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. 

The product must be installed correctly. Fixing lugs are already fitted to WPCS collars. They can be fixed to solid structures with raw plugs and screws. It is recommended that Envirograf product 58 (intumescent Mastic) is firstly inserted 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 are present 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 screwing into the collar.

WPCS’s MUST be securely fixed.


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