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1 General Provisions 2 Pipe Elements 2.1 Basic Requirements 2.2 Materials 2.3 Application of Pipe Elements 3 Design 4 Installation 4.1 Basic Requirements 4.2 Welding and Heat Treatment 4.3 Site Manufacture and Installation 4.4 Visual Inspection and Nondestructive Testing of Weld joint 4.5 Withstand Voltage Test and Leak test 5 Application, Reconstruction and Maintenance 5.1 Application 5.2 Reconstruction 5.3 Maintenance and Repair 6 Periodic Inspections 7 Safety protection devices 7.1 Basic Requirements 7.2 Safety Relief Devices (Safety Valve and Bursting Discs Device) 7.3 Flame Arrester and ESV 7.4 Installation 7.5 Inspection and Maintenance 8 Supplementary Provisions Annex A Annex B Annex C Annex D Annex E |