SY/T 6626-2005Electronic survey system (English PDF)

National Standard of the People's Republic of China

ICS

75.180.10

Classification

E92

Contents

• [Preview only]
• 1 Scope
• 1.2 Definition of terms
• 2 Normative references
• 2.1 General requirements
• 2.2 Pressure-drop limitations and piping configurations
• 2.3 Inlet stresses that originate from static loads in the discharge piping
• 2.4 Inlet stresses that originate from discharge reaction forces
• 2.5 Isolation valves in inlet piping
• 2.6 Rupture disk devices in combination with pressure relief valves
• 2.7 Process laterals connected to inlet piping of pressure relief valves
• 2.8 Turbulence in pressure relief device inlets
• 3 Terms and definitions
• 3.2 Safe disposal of relieving fluids
• 3.3 Back pressure limitations and sizing of pipe
• 3.4 Considerations for pilot-operated pressure relief valves
• 3.5 Stresses that originate from discharge piping
• 3.6 Isolation valves in the discharge piping
• 4 Isolation valves in pressure relief piping
• 4.1 Determination of relief requirements
• 4.2 Relieving pressure
• 4.3 Sizing for gas or vapor relief
• 4.4 Examples of isolation valve installations
• 4.5 Sizing for liquid relief: relief valves requiring liquid capacity certification
• 4.6 Sizing for liquid relief: relief valves not requiring liquid capacity certification
• 4.7 Sizing for two-phase liquid/vapor relief
• 4.8 Sizing for rupture disk devices
• 5 Bonnet or pilot vent piping
• 5.1 Conventional pressure relief valves
• 5.2 Balanced bellows pressure relief valves
• 5.3 Balanced piston pressure relief valve
• 5.4 Pilot-operated pressure relief valves
• 5.5 Thickness calculation of planar insulation layer
• 6 Drain piping
• 6.1 Installation conditions that require drain piping
• 6.2 Safe practice for installation of drain piping
• 6.3 SPM Location and Spatial Requirements
• 6.4 Other materials
• 6.5 Transportation, storage and custody of materials
• 7 Pressure relief device location and position
• 7.1 Inspection and maintenance
• 7.2 Proximity to pressure source
• 7.3 Proximity to other equipment
• 7.4 Mounting position
• 7.5 Test or lifting levers
• 7.6 Heat tracing and insulation
• 8 Bolting and gasketing
• 8.1 Care in installation
• 8.2 Proper gasketing and bolting for service requirements
• 8.3 Welding
• 8.4 Quality Control and Inspection
• 9 Multiple pressure relief valves with staggered settings
• 9.2 Installation of Mooring Foundation
• 9.3 Laying of Mooring Lines
• 9.4 Hook-up of Mooring Lines