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 ReferenceMaximum Pipe Size Internal Diameter (mm)Pipe Size External Diameter (mm)External Collar Diameter (mm)
WPCS 45454759
WPCS 55555769
WPCS 65657486
WPCS 757587103
WPCS 100100117137
WPCS 127127137161
WPCS 150150167195
WPCS 175175187219
WPCS 200200212248
WPCS 225225237273
WPCS 250250267311
WPCS 300300317369
WPCS 350350365421
WPCS 400400422486
WPCS 450450487563
WPCS 500500527607


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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