NEN EN 13094 : 2015

Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
  3.1 Terms and definitions
  3.2 Symbols
4 Safety device
5 Materials
  5.1 General
  5.2 Material properties
       5.2.1 Impact strength
       5.2.2 Yield strength, tensile strength and elongation
              after fracture
  5.3 Compatibility of shell materials with substances carried
6 Design
  6.1 Design verification
  6.2 Shell cross-section
       6.2.1 For shells of non-circular cross-section:
  6.3 Dynamic conditions
  6.4 Pressure conditions
  6.5 Partial vacuum conditions
  6.6 Design temperature
  6.7 Design stress
  6.8 Shell thickness
       6.8.1 Minimum shell thickness
       6.8.2 Reduction of shell thickness
  6.9 Shell openings and closures
       6.9.1 Design pressure and materials
       6.9.2 Inspection openings and manholes
       6.9.3 Openings and mountings for service equipment
       6.9.4 Cover plates
  6.10 Shell partitions, surge plates and baffles
  6.11 Attachments to the shell
  6.12 Shell supporting structure
  6.13 Protection of service equipment mounted on the tank top
       6.13.1 General requirements
       6.13.2 Minimum requirements
7 Manufacture
  7.1 General
  7.2 Cutting and edge preparation
  7.3 Forming
       7.3.1 General
       7.3.2 Hot forming
  7.4 Welding
       7.4.1 Qualification
       7.4.2 Welded joints
       7.4.3 Temporary attachments
       7.4.4 Examination and testing of welds
  7.5 Manufacturing tolerances
       7.5.1 Plate alignment
       7.5.2 Defects of form
       7.5.3 Thickness
       7.5.4 Tank ends
8 Repairs
  8.1 General requirements
  8.2 Repair of weld defects
Annex A (normative) Methods of design verification
      A.1 General
      A.2 Dynamic testing
          A.2.1 Methods for the verification of the loads
                specified in 6.3.2
          A.2.2 Test programme
      A.3 Finite element stress analysis
          A.3.1 Software selection
          A.3.2 Validation
          A.3.3 Approval
          A.3.4 Permanent record
      A.4 Reference design
      A.5 Calculation method
          A.5.1 Introduction
          A.5.2 Symbols and units
          A.5.3 Minimum thicknesses adopted
          A.5.4 Mandatory thicknesses
          A.5.5 Verification of stresses at test pressure
          A.5.6 Verification of stresses in service condition
          A.5.7 Calculation of stress in tank attachments
          A.5.8 End made up of several welded elements
Annex B (normative) Method of measurement of specific resilience
      B.1 Principle
      B.2 Apparatus
      B.3 Samples of materials to be tested
      B.4 Procedure
      B.5 Results
          B.5.1 Test values
          B.5.2 Calculation of results
          B.5.3 Acceptability of material
Annex C (normative) Design of openings and closures
Annex D (informative) Examples of welding details
      D.1 General
      D.2 Tank construction
          D.2.1 Fillet welds
          D.2.2 Joint types
      D.3 Attachment of reinforcements
          D.3.1 Attachment of reinforcements designed to
                absorb dynamic stress
          D.3.2 Attachment of reinforcements not designed
                to absorb dynamic stress
      D.4 Attachment of branches
      D.5 Attachment of flanges, collars and reinforcing
          pads to the shell
      D.6 Attachment of flanges onto branches
      D.7 Attachment of heating channels to shells
Bibliography