Calculation of hydrostatic test pressure for container coils
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Dear forum members, when designing a reactor equipped with an external coil, I’m not quite sure how to calculate the hydrostatic test pressure for that external coil. I would appreciate some guidance from you all. Coil diameter DN25; medium: circulating water; operating pressure: 0.2 Mpa; design pressure: 0.85 Mpa; operating temperature: 45 degrees Celsius; design temperature: 80 degrees Celsius; made of 20-grade steel pipe. How is the hydrostatic test pressure calculated? Please ask fellow users for some guidance. I am extremely grateful.
In accordance with Article 4.6.2.2 of GB150.1-2011
Consider it at 2 times the design pressure!
There are different approaches: some follow GB150, while others refer to the metal piping standards used in the piping engineering field, using 1.5 times the design pressure plus a temperature correction
The coiled tube is part of the piping system; it must be pressure-tested in accordance with the requirements for piping, and the pressure applied should be 1.5 times the design pressure adjusted for temperature, while also meeting the requirements of the relevant flange standards.
It can be done according to the requirements of the pipeline, using a design pressure of 1.5 times multiplied by the temperature correction: lol
Designed pressure multiplied by 1.5 times plus temperature correction