1 General
1.0.1 Responsibilities
1.0.1.1 The process system specialty is responsible for determining the differential pressure of all pumps, compressors and blowers.
In the case of any other working conditions required for the chemical process specialty, such as various changes in flow rates, unit weight and viscosity of materials, the process system specialty needs to determine the corresponding differential pressure for various situations.
1.0.2 Requirements
The differential pressure of pumps and compressors shall be determined in accordance with the following requirements:
1.0.2.1 It shall be calculated and proposed as soon as possible after the process is published;
1.0.2.2 An appropriate safety factor shall be chosen for the differential pressure determined and the factor should not be too conservative;
1.0.2.3 It shall be as close as possible to the data in the pump data sheet proposed by the chemical process specialty;
1.0.2.4 It is recommended to modify it as little as possible in the future;
1.0.2.5 The system shall have good regulation performance in the part where a control valve is used.
1.0.3 Data needed to determine the differential pressure
Because the differential pressure must be determined earlier, the process system specialty, when using the preliminary basic data to determine the differential pressure, needs at least the following information:
1 General
2 Contents of the information to be received
3 Calculation of differential pressure of pumps
4 Calculation of differential pressure of compressors
