NEN EN 14893 : 2014

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Materials
   4.1 Suitability
   4.2 Pressure retaining parts
   4.3 Non-pressure retaining parts
   4.4 Welding consumables
   4.5 Non-metallic materials (gaskets)
   4.6 Certification of materials
5 Design
   5.1 General
   5.2 Design conditions
        5.2.1 Calculation pressure
        5.2.2 Design temperature
        5.2.3 Vacuum conditions
   5.3 Calculation of thicknesses
        5.3.1 Calculation
        5.3.2 Minimum thickness for handling
   5.4 Support loadings
   5.5 Lifting lug loadings
   5.6 Openings
        5.6.1 General
        5.6.2 Reinforcement
        5.6.3 Position of welds
        5.6.4 Fittings connections
   5.7 Protection of fittings
        5.7.1 General
        5.7.2 End shrouds
        5.7.3 Protective frame
        5.7.4 Local protection
   5.8 Rolling hoops
   5.9 Ventilation openings
6 Workmanship and manufacture
   6.1 General
   6.2 Control and traceability of materials
   6.3 Manufacturing tolerances
   6.4 Acceptable weld details
        6.4.1 General
        6.4.2 Longitudinal welds
        6.4.3 Joggle joints
   6.5 Formed pressure parts
        6.5.1 General
        6.5.2 Heat treatment after forming
        6.5.3 Testing of formed part
        6.5.4 Repeated tests
        6.5.5 Visual examination and control of dimensions
        6.5.6 Marking
        6.5.7 Test certificate
   6.6 Welding
        6.6.1 General
        6.6.2 Welding procedure specification (WPS)
        6.6.3 Qualification of WPS
        6.6.4 Qualification of welders and welding personnel
        6.6.5 Preparation of edges to be welded
        6.6.6 Execution of welded joints
        6.6.7 Attachments and supports
        6.6.8 Preheating
   6.7 Post weld heat treatment
   6.8 Repairs
        6.8.1 Repairs of surface imperfections in the
              parent metal
        6.8.2 Repair of weld imperfections
7 Inspection and testing
   7.1 Visual examination of welds
   7.2 Non-destructive testing (NDT)
   7.3 Non-destructive testing techniques
        7.3.1 General
        7.3.2 Radiographic techniques
        7.3.3 Ultrasonic techniques
        7.3.4 Magnetic particle techniques
        7.3.5 Penetrant techniques
   7.4 Marking for all non-destructive testing techniques
   7.5 Qualification of personnel
   7.6 Acceptance criteria
   7.7 Production test plates (coupon plates)
   7.8 Impact tests
8 Final assessment
   8.1 Pressure test
   8.2 Lifting lugs
   8.3 Final examination
9 Surface treatment and finishing
   9.1 General
   9.2 Finishing operations
10 Fittings
   10.1 General
   10.2 Leak tightness test
   10.3 Protective frame
   10.4 Tare weight
11 Marking
12 Prototype testing
   12.1 General
   12.2 Fatigue test
   12.3 Burst test
   12.4 Drop test
   12.5 Lifting lugs
13 Records and documentation
   13.1 Records to be obtained by the manufacturer
   13.2 Documents to be provided by the manufacturer
Annex A (informative) Guidance on selection of material
                      grades
Annex B (normative) Tolerances on drums
        B.1 Mean external diameter
        B.2 Out of roundness
        B.3 Deviation from the straight line
        B.4 Irregularities in circular profile
        B.5 Thickness tolerance
        B.6 Profile
        B.7 Surface alignment
        B.8 Attachments, nozzles and fittings
Annex C (normative) Hydraulic pressure test
        C.1 Temporary fittings
        C.2 Pressure gauges
        C.3 Pressurising agent
        C.4 Avoidance of shocks
        C.5 Test procedure
Annex D (normative) Imperfections
Annex E (normative) Design formulae for drums
        E.1 Allowable stresses
        E.2 Design formulae
            E.2.1 General
            E.2.2 Cylindrical shell calculation
            E.2.3 Torispherical end calculation
            E.2.4 Ellipsoidal end calculation
            E.2.5 Formulae for calculating C
        E.3 Nozzle re-enforcement
            E.3.1 General
            E.3.2 Size of openings
            E.3.3 Distance between openings or branches
            E.3.4 Openings and branches
            E.3.5 Cylindrical shells and dished ends
                   with openings
            E.3.6 Shell reinforcement
            E.3.7 Extent of reinforcement
            E.3.8 Elliptical openings
            E.3.9 Welded branches
            E.3.10 Compensating plates
            E.3.11 Reinforcement - General
            E.3.12 Reinforcement by pads
            E.3.13 Reinforcement by branches
            E.3.14 Branch connections normal to the drum wall
Annex F (informative) Measurement of shell peaking
        F.1 Profile gauge
        F.2 Peaking survey
Annex G (informative) Examples of welded joints
Bibliography