UL SUBJECT 2425-2003《烟囱修补与表面处理系统调查大纲 发布编号:1》

1.1 These requirements cover chimney repair and resurfacing systems intended for field-installation into
new or existing masonry chimneys that are used for the natural draft venting of Category I gas-fired, Type
L vented oil-fired, and solid-fuel-fired residential-type appliances.
1.2 Chimney repair and resurfacing systems are intended to be installed in new or existing masonry
chimneys with or without a liner of fire-clay tile.
1.3 Chimney repair systems are intended to be installed in accordance with the Standard for Chimneys,
Fireplaces, Vents, and Solid Fuel-Burning Appliances, NFPA 211.
1.4 Chimney repair systems as covered by these requirements are not intended for use with Category II,
III, or IV gas burning appliances as defined by the National Fuel Gas Code, NFPA 54, or other appliances
that result in condensation of corrosive acids on the liner of the chimney, or that create positive pressures
in the chimney system.
1.5 "Repair and Resurfacing System" as defined in 5.5 may be