Low pressure steel pressure vessel problem
1 pressure vessel steel low voltage test pressure to take 1.25P and P 0.1 in both the larger value.
2. Steel pressure vessels for low pressure not by strength calculation formula to determine the wall thickness of pressure vessels (such as stability and other factorsto consider design), should increase the pressure test pressure.
3. Steel pressure vessel design low temperature (wall temperature) is greater than orequal to 200 ℃ greater than or equal to 150 ℃ steel non-ferrous metals pressure vessels, pressure test pressure P calculated as follows:
1 = PT • [σ] / [σ] t = η • P • [σ] / [σ] t
Where: P-pressure vessel design pressure, MPa (in the pressure vessel for themaximum working pressure);
PT - design temperature pressure test under pressure, MPa;
PT-test temperature pressure test under pressure, MPa;
η-pressure test the pressure coefficient (Table 5-1);
[σ] - test temperature the material allowable stress, MPa;
[σ] t - temperature of the material design allowable stress, MPa;
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Keywords: reactor, heat exchanger, pressure vessel
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