Is the safety valve calculation done by the process or by the manufacturer?
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Is the safety valve calculation done by the process or by the manufacturer? If it is made by a manufacturer, what are the requirements for the process?
The design institute does the calculation of the relief volume and the preliminary selection of the throat diameter, and the manufacturer does the accounting and final valve selection.
If installed on a pressure vessel, it should be calculated by the designer of the pressure vessel.
For small projects, the design institute can calculate it well. For large projects, the design institute usually provides the data sheet and the safety valve manufacturer will do the calculation for you again.
The safety valve calculation process is calculated first. After the calculation, a safety valve data sheet is issued. Inquiry to the safety valve manufacturer for purchase. The manufacturer will further calculate the safety valve according to the data sheet provided by the process. The manufacturer returns the calculation and quotation. In principle, the safety valve nozzle area calculated by the manufacturer should be larger than the nozzle area calculated by the process.
If it is on the storage tank equipment, the equipment manufacturer can do it when the process conditions are raised.； But if there is no mention, just use craftsmanship and only mention the nozzle. ；
First of all, the data such as discharge volume, set pressure, back pressure, material composition, and temperature must be provided by the design institute, and the design institute needs to calculate the throat diameter. The manufacturer will make calculations after receiving the safety valve data sheet from the design institute. https://bbs.hcbbs.com/thread-2727010-1-1.html
Design institutes raise process requirements. In the past, they used process calculations. Now, manufacturers generally calculate and return calculation results, because the coefficient values of different manufacturers (models) of technology vary greatly. In addition, manufacturers can also provide such services free of charge in order to obtain more ordered products.
The equipment manufacturer of the equipment body shall provide conditions or configurations, and other pressure equipment and piping shall be provided by the designer.