BS 1857:2010 pdf download – Chimneys — Components — Concrete flue liners
This European Standard specifies the material, dimensional and performance requirements, including methods oftest,for precast concrete flue liners and fittings with or without insulation for the construction of multi-wallchimneys.
This document does not cover:
— high positive pressure (H) designated products;
– products designated wet (w) in conjunction with corrosion class 3.
This document also applies to storey-height and flue liners reinforced only for handling.
NOTE1 Any reference to the term flue liners implies both fue liners and their fittings, except where otherwiseindicated.
NOTE2 The pressure classes and corrosion classes are defined in EN 1443.
The following referenced documents are indispensable for the application of this document.For datedreferences,only the edition cited applies.For undated references,the latest edition of the referenceddocument (including any amendments) applies.
EN 1443:2003, Chimneys — General requirementsEN 1859,Chimneys – Metal chimneys – Test methods
EN 10088-2:2005，Stainless steels — Part 2: Technical delivery conditions for sheet/plate and strip ofcorrosion resisting steels for general purposes
EN 10218-2,Steel wire and wire products —General — Part 2: Wire dimensions and tolerancesEN 13216-1, Chimneys — Test methods for system chimneys — Part 1: General test methods
EN 13384-1:2002+A2:2008,Chimneys — Thermal and fluid dynamic calculation methods — Part 1:Chimneys serving one appliance
EN 14297:2004,Chimneys —Freeze-thaw resistance test method for chimney products
EN ISO 7500-1:2004, Metallic materials – Verification of static uniaxialtesting machines -Part 1:Tension/compression testing machines — Verification and calibration of the force-measuring system(lSO 7500-1:2004)
ISO 2859-1，Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed byacceptance quality limit (AQL) for lot-by-lot inspection
3Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1443:2003 and the following apply.
material formed by mixing cement, coarse and fine aggregate and water, with or without the incorporation of admixtures and additions, which develops its properties by hydration of the cement
flue liner bend
flue liner that changes the direction of the flue
manufacturer’s declared internal transverse dimensions
internal dimensions of the flue liner measured perpendicular to the longitudinal axis
manufacturer’s declared height
internal height of the flue liner
NOTE Examples of measurement are shown in Figure 1.
manufacturer’s declared structural height
maximum height of construction of the flue liners as declared by the manufacturer
concrete that is cast in a place other than its final location of use
reinforced flue liner
flue liner having reinforcement to assist handling
NOTE The reinforcement is not for structural stability.
flue liner having manufacturer’s declared height relating to the floor to floor height of a building
Flue liners shall be precast concrete.
Materials used shall be documented for factory production control purposes.
NOTE Additions may include glass or steel fibres.
4.2 Reaction to fire
In accordance with Commission Decision 96/603/EC, as amended, flue liners to this standard are classified as reaction to fire class A1 without test provided they contain not more than a mass or volume fraction of 1 % (whichever is the more onerous) of homogeneously distributed organic materials.
5 Reinforcement for handling
5.1 Where a liner is reinforced for handling the reinforcement shall have a maximum diameter of 8 mm and a minimum concrete cover of 15 mm on all sides for temperature classes up to and including T250 and a minimum concrete cover of 20 mm on all sides for all other temperature classes.
5.2 In reinforced liners having a bulk density of less than 2 000 kg/m 3 , when measured in accordance with A.10, any reinforcement shall be protected against corrosion by:
a) use of stainless steel conforming to the requirements of EN 10088-2; or
b) by completely covering any mild steel reinforcement conforming to EN 10218-2 with a coating (e.g. typically Portland cement CEM I or CEM II mixed with water to form a slurry or epoxy resin).
6 Surface treatment
Any surface treatment of the flue liner, e.g. coatings, shall be factory applied before the product is tested.