Calculation of discharge for process safety valves and selection techniques for safety protection devices

Thread Content

1. Design, selection, and calculation of safety valves – Comparative analysis of old and new standards, in-depth discussion of key sections (GB/T 38599-2020 \"Combination of Safety Valves and Burst Disc Safety Devices\")； Ø Introduction and comparison of domestic and international standards and specifications related to safety valves (GB/T 12241-2005, API520/521, ISO42161, TSG ZF001－2006) ； Ø Structural types, classification, and selection of safety valves ； Ø Several parameters related to the operation of the safety valve itself and their meanings (maximum allowable working pressure (MAWP), accumulated pressure (Pa), overpressure, maximum overpressure and maximum discharge pressure (Pa), back pressure, etc.) ； Ø Analysis of the safety valve discharge operation condition, determination of back pressure ； Ø Determination and calculation of the safety valve’s discharge capacity (discharge volume) ； Ø Calculation of the safety valve nozzle area and determination of the nominal diameter of the safety valve ； Ø Explanation of the safety valve discharge capacity calculation software ； Ø Examples of safety valve selection and calculation examples for various operating conditions ； Calculation of safety valves under fire conditions ； Calculation for the discharge of gases, vapors, and liquids by safety valves ； Calculation of the pressure relief load in the event of a power failure of the bottom reflux pump ； Calculation of the pressure relief load in case of a failure in the distillation tower cooler. 2. Requirements for the inspection and testing of safety valves Ø General requirements: Basic methods of testing, conditions for extending the calibration period, and corresponding safety measures ； Ø Online inspection: installation requirements, documentation filing, setting of lead-sealed shut-off valves, external surface corrosion, etc ； Ø Online inspection: Visual inspection methods, technical requirements for online inspection, personal protection requirements for online inspection, and requirements regarding relevant documentation ； Ø Offline inspection and verification: procedures for offline inspection, records that must be kept, requirements for installation and replacement in special situations ； Ø Recording, labeling, and reporting: inspection test records, labels, inspection test reports, etc. 3. Specifications, structural performance, and selection of rupture disc safety devices Ø Introduction to the main contents of the specifications for rupture disc safety devices (GB567.1～GB567.4) ； Ø Basic requirements for blast fragments: design, manufacturing, testing methods, inspection rules, marking and labeling, packaging, transportation, and storage ； Ø Selection of blast fragment applications: selection requirements, technical parameters, discharge volume calculation, replacement cycle ； Ø Fragment classification and installation dimensions: ； Category, model, and installation dimension requirements ； Ø Fragment testing: blasting test, discharge volume test, fatigue test, flow resistance test. 4. Methods for calculating the venting volume of breather valves and low-pressure storage tanks Ø Methods for calculating normal and emergency breathing volumes of storage tanks ； Ø Calculation methods for API, ISO, and discharge volume Ø Comparison of tank discharge volume and vent valve performance at 100% and 10% overpressure ； Technical advantages of the 10% overpressure value for breather valves ； Ø Comparison of API and ISO leakage calculation methods ； How to determine the appropriate nitrogen sealing amount, as well as the pressure values for vent valves and emergency release valves. Explanation of software used for calculating venting requirements for vent valves and low-pressure storage tanks. 5. Installation of flame arrestors Ø Current status of flame arrestor standards in China and comparison of domestic and foreign products (GB5908, GB/T13349, HG-T 20570.19-95) ； Ø Classification and selection of flame arresters ； Contact me if you need it