CSA C50068 : 1999 : INC : UPD 1 : 1999 : R2012

1 Introduction
2 Scope and field of application
3 Definitions
4 Materials
5 Design
6 Manufacture and workmanship
7 Inspection and testing
8 Pressure relief devices
9 Certification and marking
Annexes
A Welding procedure and welder performance tests
B Sample of record form
C National deviations

Applicable to fusion welded wrought steel enclosures pressurized with dry air, inert gases, for example, sulphur hexafluoride, carbon tetrafluoride, or nitrogen or a mixture of such gases, used in indoor or outdoor installations of high-voltage switchgear and controlgear, where the gas is used principally for its dielectric and/or arc-quenching properties, with rated voltages: (a) 1 kV and up to and including 52 kV and with gas-filled compartments with design pressure greater than 3 bar (gauge); and (b) 72.5 kV and above. Also covers pressurized components such as the centre chamber of live tank switchgear, gas-insulated current transformers, etc.