Fume extraction ductwork may be made from:
uPVC, Polypropylene, GRP/uPVC,
FireRetardent GRP/uPVC or Pure GRP.
The most suitable material is chosen to match each specific application. |
This is the most commonly used plastic for fume extraction. It provides good corrosion resistance against the majority of chemical fumes. PVC is easily welded. Smaller diameter duct may be jointed using solvent glues. Standard colour is dark grey (RAL7011).
Duct with circular cross section is available in standard sizes from 110mm to over 1000mm diameter. Square and rectangular duct is fabricated from flat sheet
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Polypropylene (PP) offers increased corrosion resistance and can be used at slightly higher temperatures than PVC. The type of polypropylene used in our systems is referred to as PPS, which contains additives to provide a self-extinguishing material.
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uPVC duct may be wrapped with a fibreglass reinforcement in order to strenghten the duct, colour match the duct or provide additional potection against UV degredation.
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uPVC wrapped with a special fire retardent GRP coating can achieve Class 1 fire rating (BS476 parts 6&7).
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A vinyl ester resin interior combined with a fire retardent phenolic exterior provides a pure GRP duct with highly chemical resistant and highly fire resistant properties. This duct passes the Factory Mutual Research fire test FM4922.
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