13.12.2022

Question
Question: The setting pressure of FP-SV-038 is 3.0 MPa, the maximum working pressure of FP-LR vessels is 2.8 MPa. What excess pressure is allowed in a pressure vessel?
Answer:
In accordance with TR TS 032/2013:
Settings for the start of opening and the operating range of the safety device.
54. The number of safety valves, their dimensions and throughput are determined in such a way that excess pressure is not created in the equipment that exceeds the maximum allowable working pressure:
a) more than 0.05 MPa - for vessels in which the overpressure is less than 0.3 MPa;
b) by 15 percent - for vessels in which the excess pressure is from 0.3 to 6 MPa inclusive;
c) by 10 percent - for vessels in which the excess pressure is more than 6 MPa.
GOST 12.2.085-2002:
4.2 The number of valves, their dimensions and capacity must be chosen so that the pressure in the vessel cannot exceed the design pressure by more than 0.05 MPa (0.5 kg/cmg) for vessels with pressure up to 0.3 MPa (3 kgf). /cm-'), by 15% - for vessels with pressure over 0.3 to 6.0 MPa (from 3 to 60 kgf/cm2) and by 10% - for vessels with pressure over 6.0 MPa (60 kgf/cm2) .
Proceeding from this, a PC for a vessel with a maximum working pressure of 2.8 MPa should operate in the range from 2.8 MPa to 3.2 MPa; from 2.8 MPa to 3.2 MPa. For vessels with a maximum working pressure of 4.5 MPa, the valve must operate in the range from 4.5 MPa to 5.2 MPa.

Answer
Question: The setting pressure of FP-SV-038 is 3.0 MPa, the maximum working pressure of FP-LR vessels is 2.8 MPa. What excess pressure is allowed in a pressure vessel?
Answer:
In accordance with TR TS 032/2013:
Settings for the start of opening and the operating range of the safety device.
54. The number of safety valves, their dimensions and throughput are determined in such a way that excess pressure is not created in the equipment that exceeds the maximum allowable working pressure:
a) more than 0.05 MPa - for vessels in which the overpressure is less than 0.3 MPa;
b) by 15 percent - for vessels in which the excess pressure is from 0.3 to 6 MPa inclusive;
c) by 10 percent - for vessels in which the excess pressure is more than 6 MPa.
GOST 12.2.085-2002:
4.2 The number of valves, their dimensions and capacity must be chosen so that the pressure in the vessel cannot exceed the design pressure by more than 0.05 MPa (0.5 kg/cmg) for vessels with pressure up to 0.3 MPa (3 kgf). /cm-'), by 15% - for vessels with pressure over 0.3 to 6.0 MPa (from 3 to 60 kgf/cm2) and by 10% - for vessels with pressure over 6.0 MPa (60 kgf/cm2) .
Proceeding from this, a PC for a vessel with a maximum working pressure of 2.8 MPa should operate in the range from 2.8 MPa to 3.2 MPa; from 2.8 MPa to 3.2 MPa. For vessels with a maximum working pressure of 4.5 MPa, the valve must operate in the range from 4.5 MPa to 5.2 MPa.

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