EN 12807:2009

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 Design of ends of shapes other than torispherical
        and semi-ellipsoidal
   5.5 Minimum wall thickness
   5.6 Design of openings
   5.7 Valve protection
   5.8 Non-pressure containing attachments
6 Construction and workmanship
   6.1 Brazing qualification
   6.2 Plates and pressed parts
   6.3 Brazed joints
   6.4 Tolerances
        6.4.1 Out of roundness
        6.4.2 Straightness
        6.4.3 Verticality
   6.5 Heat treatment
   6.6 Protective coating
   6.7 Closure of openings
7 Tests and examinations
   7.1 General
   7.2 Types of test and evaluation of the test results
   7.3 Material testing
   7.4 Tensile test
        7.4.1 Parent material
        7.4.2 Joints
   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 Ultrasonic examination
        7.8.1 Procedure
        7.8.2 Assessment
        7.8.3 Requirements
   7.9 Macro examination
        7.9.1 Procedure
        7.9.2 Requirements
   7.10 Visual examination of the surface of the joint
        7.10.1 Procedure
        7.10.2 Requirements
   7.11 Fatigue test
        7.11.1 Procedure
        7.11.2 Requirement
8 Technical requirements for type approval
   8.1 Extent of testing
   8.2 Cylinder types
   8.3 Type approval certificate
9 Production testing and examination requirements
   9.1 Tests and examinations applicable to all cylinders
   9.2 Ultrasonic examination
   9.3 Macro examination
   9.4 Examination of the valve boss joint
   9.5 Examination of non-pressure containing joints
   9.6 Unacceptable imperfections found by the ultrasonic or
        macro examinations
   9.7 Batch testing (Mechanical/Burst tests)
        9.7.1 Batch
        9.7.2 Inspection lots
        9.7.3 Rate of sampling
        9.7.4 Additional checks
   9.8 Failure to meet mechanical and burst test requirements
        9.8.1 Mechanical
        9.8.2 Burst
        9.8.3 Re-test
        9.8.4 Resubmission of an inspection lot
10 Marking
11 Certificates
Bibliography

This European Standard specifies the minimum requirements for the design, construction and testing during manufacture of transportable refillable brazed steel Liquefied Petroleum Gas (LPG) cylinders, of water capacity from 0,5 l up to and including 15 l, exposed to ambient temperatures. This European Standard applies only to cylinders having a circular cross-section without any longitudinal joint.