PREN 1856-2 : DRAFT 2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Manufacturer's declaration for type test
5 Dimensions and tolerances
6 Performance requirements
   6.1 Mechanical resistance and stability
        6.1.1 Rigid flue liners and rigid connecting
               flue pipes and fittings
        6.1.2 Flexible flue liners
   6.2 Resistance to fire
        6.2.1 Rigid flue liners and fittings
        6.2.2 Rigid connecting flue pipes and fittings
        6.2.3 Flexible flue liners and fittings
   6.3 Gas tightness
   6.4 Safety in use
        6.4.1 Thermal performance at normal
               operating conditions
        6.4.2 Accidental human contact
        6.4.3 Thermal resistance
        6.4.4 Water vapour diffusion resistance
        6.4.5 Condensate penetration resistance
        6.4.6 Flow resistance
   6.5 Durability
        6.5.1 Durability against corrosion
        6.5.2 Freeze thaw resistance
        6.5.3 Flue liner seals
7 Product information
   7.1 Manufacturer's instructions
   7.2 Minimum information to be included in the
        manufacturer's documentation and instructions
        7.2.1 Rigid flue liners, rigid connecting flue
               pipes and fittings
        7.2.2 Flexible flue liners and fittings
8 Marking and labelling
   8.1 Flue liners, rigid connecting flue pipes
        and fittings
   8.2 Chimney plate
   8.3 Packaging
9 Product designation
10 Evaluation of conformity
   10.1 General
   10.2 Type testing
        10.2.1 Initial type testing
        10.2.2 Further type testing
        10.2.3 Sampling for type testing
   10.3 Factory production control (FPC)
        10.3.1 General
        10.3.2 Equipment
        10.3.3 Raw materials and components
        10.3.4 Product testing and evaluation
        10.3.5 Non conforming products
Annex A (normative) - Test methods
      A.1 Measure of diameter of flexible flue liner
          A.1.1 Procedure
          A.1.2 Results
      A.2 Gas tightness
          A.2.1 General
          A.2.2 Conditioning and apparatus
          A.2.3 Procedure
          A.2.4 Results
      A.3 Tensile strength
          A.3.1 Test assembly
          A.3.2 Procedure
          A.3.3 Test results
      A.4 Crushing resistance
          A.4.1 Test apparatus
          A.4.2 Procedure
          A.4.3 Test results
      A.5 Flexibility test
          A.5.1 Test apparatus
          A.5.2 Test conditioning
          A.5.3 Procedure
          A.5.4 Results
      A.6 Torsion strength test
          A.6.1 Test apparatus
          A.6.2 Test assembly
          A.6.3 Procedure
          A.6.4 Results
      A.7 Thermal performance test
          A.7.1 Apparatus
          A.7.2 Test structures
          A.7.3 Test samples
          A.7.4 Thermal test procedure
Annex B (normative) - Choice of size for type
                      test and sampling
      B.1 General
      B.2 Thermal testing
      B.3 Mechanical tests
      B.4 Gas tightness
      B.5 Samples
      B.6 Factory production control
      B.7 Nature of changes requiring further type test
Annex ZA (informative) - Relationship between this
                         European Standard and the
                         Essential Requirements of
                         Construction Products
                         Directive (89/106/EEC)
      ZA.1 Scope and relevant characteristics
      ZA.2 Procedure(s) for attestation of conformity
           of rigid or flexible flue liners and
           rigid connecting flue pipes
           ZA.2.1 System(s) of attestation of conformity
           ZA.2.2 EC Declaration of conformity
           ZA.3 CE marking and labelling
Bibliography

Describes the performance requirements for rigid or flexible metal flue liners, rigid metal connecting flue pipes and their fittings used to convey the products of combustion from appliances to the outside atmosphere (including their supports).