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Docherty Flues & Chimney Products -


The vitreous enamel coating meets the following standards:

High temperature resistance requirements BS1344 Parts 1 & 7

Acid resistance Class SA requirement of BS1344 Part 3

5" to 8" diameters are manufactured from rolled and welded 18 guage 1.2mm thick low carbon mild steel sheet to BS 1449 Part 1

4" diameter is manufactured from 20 guage (0.9mm to 1.0mm)

Approvals / Authority

Docherty VF complies with the following requiremants:

Building Regulations Section "J"
British Standard - BS 6461 "Chimney and Flues for Domestic Appliances Burning Solid Fuel
(including wood and peat)"
Scottish Development Department's Building Regulations Class Relaxation Directive No. 61 dated May 1982.


For gas fired appliances and appliances using up to 28 sec oil
Triple Lock Joint accepted by industry as the strongest joint system available
Deep corrugation format for greatest strength and flexibility
Specialist supply of large diameter liners in single continuous lengths
All sizes and lengths are available for delivery ususally within 24 hours
A wide variety of terminals is available, suitable for most requirements

Spirally wound corrugated flexible liner
Manufactured from 316 grade stainless steel
Withstands temperatures of up to 250°
A wide range of diameters available from 80mm to 560mm
Approved to BS 715