NEN EN 14427 : 2014

1 Scope
2 Normative references
3 Terms, definitions and symbols and abbreviations
  3.1 Terms and definitions
4 Design and manufacture
  4.1 General
  4.2 Liner
      4.2.1 Metallic liners
      4.2.2 Non-metallic liners
      4.2.3 Design drawing
  4.3 Composite overwrap
      4.3.1 Materials
      4.3.2 Winding
      4.3.3 Cylinders without liners comprising two parts
  4.4 Finished cylinder
      4.4.1 Design drawings
      4.4.2 Cylinders without liner
      4.4.3 Autofrettage
      4.4.4 Manufacturing requirements for the finished cylinder
      4.4.5 Neck ring
      4.4.6 Cylinder stability
5 Cylinder and material tests
  5.1 General
  5.2 Test procedures and test requirements
      5.2.1 Test No. 1 - Composite material tests, including
             adhesives (where applicable)
      5.2.2 Test No. 2 - Liner material tests
      5.2.3 Test No. 3 - Liner burst test
      5.2.4 Test No. 4 - Hydraulic proof test of finished cylinders
      5.2.5 Test No. 5 - Cylinder burst test
      5.2.6 Test No. 6 - Pressure cycle test
      5.2.7 Test No. 7 - Artificial ageing test
      5.2.8 Test No. 8 - Exposure to elevated temperature at test
                          pressure
      5.2.9 Test No. 9 - Cylinder body integrity impact tests
      5.2.10 Test No. 10 - Drop test
      5.2.11 Test No. 11 - Flawed cylinder test
      5.2.12 Test No. 12 - Extreme temperature cycle test
      5.2.13 Test No. 13 - Fire resistance test
      5.2.14 Test No. 14 - Spike puncture test
      5.2.15 Test No. 15 - Permeability test of cylinders with
                           non-metallic liners
      5.2.16 Test No. 16 - Torque test
      5.2.17 Test No. 17 - Neck strength test
      5.2.18 Test No. 18 - Neck ring test
  5.3 Failure to meet test requirements
      5.3.1 Metallic liners
      5.3.2 Complete cylinder
6 Conformity evaluation
7 Marking
Annex A (normative) Prototype testing, design variant testing
        and production testing
      A.1 General
      A.2 Prototype testing
          A.2.1 General
          A.2.2 Definition of new design
          A.2.3 Prototype testing requirements
          A.2.4 Prototype testing certificate
      A.3 Design variant testing
          A.3.1 General
          A.3.2 Definition of a design variant
          A.3.3 Design variant test requirements
          A.3.4 Design variant testing certificate
      A.4 Production testing
          A.4.1 General
          A.4.2 Production test requirements
          A.4.3 Liner batch tests and inspections
          A.4.4 Composite materials batch tests and inspections
          A.4.5 Tests and inspections of the finished cylinder
          A.4.6 Batch acceptance certificate
Annex B (informative) Examples of type approval and production
        testing certificates
      B.1 Type approval certificate - composite cylinders with
          metallic liners
      B.2 Type approval certificate - composite cylinders with
          non-metallic liners
      B.3 Type approval certificate - composite cylinders without
          liners
      B.4 Design variant approval certificate - composite cylinders
          with metallic liners
      B.5 Production test certificate
Annex C (informative) Manufacturers marking