AS EN 50064:2023 identically adopts EN 50064:2018 which specifies requirements for wrought aluminium and aluminium alloy enclosures and their welding. These enclosures are pressurized with dry air, inert gases, for example sulphur hexafluoride or nitrogen or a mixture of such gases, used in indoor and outdoor installations of high-voltage switchgear and controlgear with rated voltages above 1 kV, where the gas is used principally for its dielectric and/or arc-quenching properties with rated voltages
Table of contents
Header
About this publication
European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Quality assurance
5 Normal and special service conditions
6 Materials
6.1 Selection of material
6.2 Chemical analysis
7 Design
7.1 General
7.2 Calculation methods
7.2.1 General
7.2.2 Evaluation of mechanical strength using “Design by Formula”
7.2.3 Evaluation of mechanical strength using “Design by Analysis”
7.2.3.1 Normal loads
7.2.3.2 Exceptional loads
7.2.4 Evaluation of mechanical strength using “Design by Burst test”
7.2.4.1 General
7.2.4.2 Burst test procedure
7.2.4.3 Strain measurement test procedure
7.2.5 Flanges
7.2.6 Bolted connections
7.2.6.1 General
7.2.6.2 Normal loads
7.2.6.3 Exceptional loads
7.3 Inspection and access openings
8 Manufacture and workmanship
8.1 Material identification
8.2 Order of completion of weld seams
8.3 Cutting of materials
8.3.1 General
8.3.2 Cold sharing
8.3.3 Thermal cutting
8.3.4 Examination of cut edges
8.4 Forming of shell sections and end plates
8.5 Assembly tolerances
8.6 Welded joints
8.7 Assembly for welding
8.8 General welding requirements
8.9 Preheating
8.10 Surface finish
9 Repair of welding defects
10 Inspection, testing and certification
10.1 Type tests
10.1.1 General
10.1.2 Burst test procedure
10.1.3 Strain measurement test
10.2 Inspection and routine tests
10.2.1 General
10.2.2 Routine pressure tests
10.3 Welding procedure specifications
10.4 Welder performance tests
10.5 Non-destructive testing
10.5.1 Amount of testing of welded joints
10.5.2 Test methods for weld seams
10.5.3 Radiography
10.5.3.1 Ultrasonic
10.5.3.2 Penetrant method
10.5.4 Surface conditions and preparations for testing
10.5.5 Marking of the enclosure welds
10.5.6 Reporting
10.5.7 Minimum acceptance levels
10.5.8 Assessment of imperfections
10.6 Design specification, drawings and data sheets
