Diameters from 75 mm to 600 mm for use with solid fuel and oil burning appliances of output rating not exceeding 45 kW, for gas fired appliances, and for incinerators not exceeding 0.09 m^3 capacity.Cross References:BS 12BS 41BS 567BS 1014BS 3763BS 4624CP 337BS 6100:Subsection 1.5.1 Health and Safety at Work etc. Act 1974Consumer Safety Act 1978Asbestos Products (Safety) Regulations 1985 Asbestos (Prohibitions) Regulations 1985Control of Asbestos at Work Regulations 1987