08/30187754 DC : 0

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Flue liners and openings
     4.1 Flue liner cross-sections
     4.2 Inspection openings, chimney junctions and inspection
           doors
5 Types of flue liner
6 Materials
7 Tolerances on dimensions
     7.1 Transverse dimension
     7.2 Height
     7.3 Angle of curvature
     7.4 Straightness
     7.5 Squareness of ends
     7.6 Deviation from shape of cross section
     7.7 Joints
8 Proof load
     8.1 Straight flue liners
     8.2 Curved flue liners
     8.3 Minimum load for inspection opening sections
9 Gas tightness/leakage, thermal shock resistance and soot
     fire resistance for straight flue liners
     9.1 Initial test
     9.2 Final gas tightness after fire resistance
           9.2.1 Final gas tightness after sootfire testing
           9.2.2 Final gas tightness after thermal shock testing
10 Durability
     10.1 Corrosion resistance
     10.2 Freeze/Thaw resistance
11 Water absorption and bulk density
     11.1 General
           11.1.1 Water absorption
           11.1.2 Bulk density
12 Abrasion resistance
13 Condensate resistance and flow resistance
     13.1 Condensate resistance
     13.2 Flow resistance
14 Thermal resistance
15 Evaluation of conformity
     15.1 Initial type testing
     15.2 Further type tests
     15.3 Factory production control
16 Test methods
     16.1 Size
     16.2 Height
     16.3 Angle of curvature
     16.4 Straightness
     16.5 Squareness of ends
     16.6 Deviation from shape of cross-section
     16.7 Proof load
           16.7.1 Test specimen
           16.7.2 Testing equipment
           16.7.3 Test procedure
     16.8 Thermal testing
           16.8.1 Test flue
           16.8.2 Test equipment
           16.8.3 Assembly of test flue
           16.8.4 Thermal conditioning
           16.8.5 Measurement of leakage rate
           16.8.6 Expression of result
     16.9 Corrosion resistance
           16.9.1 Test specimens
           16.9.2 Test equipment
           16.9.3 Test procedure
           16.9.4 Expression of results
     16.10 Water absorption
           16.10.1 Test specimen
           16.10.2 Test equipment
           16.10.3 Test procedure
           16.10.4 Expression of results
     16.11 Bulk density
           16.11.1 Test specimen
           16.11.2 Test equipment
           16.11.3 Test procedure
           16.11.4 Expression of results
     16.12 Abrasion resistance
           16.12.1 Test flue
           16.12.2 Test equipment
           16.12.3 Test procedure
           16.12.4 Expression of results
     16.13 Water and vapour flow test
           16.13.1 Test section
           16.13.2 Test apparatus
           16.13.3 Test procedure
           16.13.4 Expression of results
17 Designation
18 Marking
Annex A (normative) - Sampling procedures for an AQL of 10%
         and inspection level S2
    A.1 Acceptability determination
         A.1.1 Single sampling
         A.1.2 Double sampling
    A.2 Normal inspection
    A.3 Normal to reduced inspection
    A.4 Reduced to normal inspection
    A.5 Tightened inspection
    A.6 Tightened to normal inspection
    A.7 Discontinuation of inspection
Annex B (normative) - Thermal resistance
    B.1 Method 1: simplified calculation for flue liners without
        cavities
    B.2 Method 2: thermal resistance of flue liners with or without
        cavities
        B.2.1 General
        B.2.2 Data
        B.2.3 Specific conditions for the cavities
        B.2.4 Calculations
    B.3 Method Approximate thermal resistance values
Annex C (normative) - Measurement of the coefficient of friction
        of chimneys
Annex D (informative)
Annex ZA (informative) - Clauses of this European Standard addressing
         the provisions of the EU Construction Products Directive
    ZA.1 Scope and relevant characteristics
    ZA.2 Procedure of attestation of conformity of clay/ceramic
         flue liners and fittings
         ZA.2.1 System of attestation of conformity
         ZA.2.2 EC Certificate and Declaration of conformity
    ZA.3 CE Marking and labelling
Bibliography

BS EN 1457-2