NBN EN 1856-2:2004

This European Standard specifies the performance requirements for rigid or flexible metal liners, rigid connecting flue pipes and rigid fittings used to convey the products of combustion from appliances to the outside atmosphere (including their supports).
Vitreous enamelled connecting flue pipes are also covered by this standard.
Rigid liners can be used as flue liners for renovation or adaptation of existing chimneys and as flue liners of custom built chimneys.
Flexible metal liners described in this European Standard are exclusively for renovation or adaptation of existing chimneys.
This European Standard also specifies the requirements for marking, manufacturer's instructions, product information and evaluation of conformity.
Flexible connecting flue pipes and extensible flexible products designed to be compressed or extended along their length are excluded from the scope of this standard.
Single wall and multi-wall system chimney products are covered by EN 1856-1.