UL 1777:1998 pdf download Chimney Liners
Scope
1.1 These requirements cover metallic and nonmetallic chimney liners intended for field-installation into new oexisting masonry chimneys that are used for the natural draft venting of Category l gas-fired, Type L vented oil-fired.and solid-fue-fired residential-type applia nces in which the maximum continuous flue-gas outlet temperatures do notexceed 1000“F(538C)
Revised 1.1 effective August 20, 1999
1.2 Chimney liners are intended to be installed in existing masonry chimneys with or without a liner of fire-clay tileor to be used as a substitute for masonry fire-clay tile flue liners in new chimneys.
1.3 Chimney liners are intended to be installed in accordance with the Standard for Chimneys, Fireplaces, Vents.and Solid Fuel Burning Appliances, NFPA 211; and codes such as the BOCA National Mechanical Code, th eStandard Mechanical Code, and the Uniform Mechanical Code.
1.4 Chimney liners as covered by these requirements arenot intended for use with Category l, ll, or lV gas burningappliances as defined by the National Fuel Gas Code, NFPA 54, or other appliances that result in condensation ofcorrosive acids on the liner of the chimney, or that create positive pressures in the chimney system.
1.5A product that contains features, charac teristics, components, materials, or systems new or different from thosecovered by the requirements i n this Standard, and that involve a risk of fire, electric shock, or injury to persons shallbe evaluated using the a ppropriate additional component and end-product reauirements as reauired to maintain thelevel of safety as originally anticipated by the intent of this Standard. A product whose features, characteristicscomponents, materials, or sys tems conflict with specific requirements or provisions of this Standard is not judged tocomply with this Standa rd.Where appropriate, revision of requirements are proposed and adopted in conformancewith the methods employed for development, revision, and implementation of this Standard.
2 Units of Measurement
2.1 If a value for m easurement is followed by a value in other units in parentheses, the first stated value is th erequirement.
3 Glossary
3.1 For the purpose of this standard, the following definitions apply.
3.2 APPLIANCE,HEATING – A chimneyconnected, fuel-burning device.
3.2.1 CATEGORY I GAS-FIRED APPLIANCE – A gas appliance that operates with a non-positive vent stati cpressure and with a vent gas temperature that avoids excessive condensate production in the vent*Added 3.2.1 effective August 20,1999*
3.3 CERTIFIED CHIMNEY SWEEP – A chimney sweep certified by a nationally endorsed chimney swee porganization.
3.4 CHIMNEY CONNECTOR – The flue pipe that connects a fuel-burning appliance to a chimney.
3.5 CHIMNEY,M ASONRY – A field constructed chimney of solid masonry units, bricks, stones, or reinforcedportland-cement concrete, lined with chimney flue liners buit in accordance with applicable building cod erequirements.