NEN EN 14140 : 2014 C1 2015

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
   3.1 Terms and definitions
   3.2 Symbols
4 Materials
5 Design
   5.1 General requirements
   5.2 Calculation of cylindrical shell thickness
   5.3 Design of torispherical and semi-ellipsoidal ends concave to
       pressure
   5.4 Ends of other shapes
   5.5 Minimum wall thickness
   5.6 Design of openings
6 Construction and workmanship
   6.1 Welding qualification
   6.2 Plates and pressed parts
   6.3 Welded joints
   6.4 Tolerances
       6.4.1 Out-of-roundness
       6.4.2 Straightness
       6.4.3 Verticality
   6.5 Non-pressure containing attachments
   6.6 Valve protection
   6.7 Closure of openings
   6.8 Heat Treatment
7 Tests and examinations
   7.1 General
   7.2 Types of test and evaluation of test results
   7.3 Test specimens and related tests and examinations
        7.3.1 Two-piece cylinders
        7.3.2 Three-piece cylinders
        7.3.3 Bung welds
   7.4 Tensile test
        7.4.1 Parent metal
        7.4.2 Welds
   7.5 Bend test
        7.5.1 Procedure
        7.5.2 Requirements
   7.6 Burst test under hydraulic pressure
        7.6.1 Procedure
        7.6.2 Requirements
   7.7 Pressure test
        7.7.1 Procedure
        7.7.2 Requirements
   7.8 Radiographic examination
        7.8.1 Procedure
        7.8.2 Assessment
        7.8.3 Requirements
   7.9 Macro examination
        7.9.1 Procedure
        7.9.2 Requirement
   7.10 Visual examination of the surface of the weld
        7.10.1 Procedure
        7.10.2 Requirements
   7.11 Fatigue test
        7.11.1 Procedure
        7.11.2 Requirements
   7.12 Resistance to external corrosion
        7.12.1 Coated cylinders
        7.12.2 Un-coated cylinders
   7.13 Cylinder body integrity impact tests
        7.13.1 General
        7.13.2 Flat surface impact test
        7.13.3 Edge impact test
   7.14 Drop tests
        7.14.1 Procedure
        7.14.2 Requirement
8 Technical requirements for type approval
   8.1 Extent of testing
   8.2 Cylinder types
9 Production testing and examination requirements
   9.1 Tests and examinations applicable to all cylinders
   9.2 Radiographic examination
   9.3 Macro examination
   9.4 Examination of bung welding
   9.5 Examination of welding of non-pressure containing attachments
   9.6 Unacceptable imperfections in radiographic or macro examination
   9.7 Batch testing (Mechanical/Burst tests)
       9.7.1 Batch
       9.7.2 Inspection lots
       9.7.3 Rate of sampling
   9.8 Failure to meet mechanical and burst test requirements
       9.8.1 Mechanical
       9.8.2 Burst
       9.8.3 Batch retest
       9.8.4 Resubmission of batch
10 Marking
11 Certificate
Annex A (normative) Manufacturers marking
Bibliography