Issues related to pressure vessel pressure testing

The gas used is dry, clean air, nitrogen, or other non-flammable and non-toxic gases. The test pressure should be 1.15 times the design pressure. Boosting procedures required, etc.

When a pneumatic test is used in place of a hydraulic test, the drawings must meet the following requirements: 1. The pressure level for the pneumatic test and the testing method must be clearly indicated. 2. Specify the type and pressure of the gas, as well as the temperature and humidity conditions required during testing. 3. Indicate the safety valve settings of the pressure vessel and the opening pressure of the safety valve. 4. Specify the dimensions, materials, and manufacturing requirements of the pressure vessel, which must comply with relevant standards and specifications. 5. Mark the pressure vessel with the required identifiers, such as the manufacturer’s name, model number, date of manufacture, and usage restrictions. 6. Specify the location, dimensions, and material requirements for the container’s connection ports, pipes, and valves. 7. Explain the support method and fixing method of the container. 8. Install necessary safety equipment, such as safety valves, pressure gauges, pressure sensors, etc. 9. Clearly mark the measurement points on the drawing for inspection and monitoring. 10. It must meet the requirements of **relevant technical standards and laws and regulations. The above requirements are intended to ensure that pressure tests can be carried out safely and reliably, as well as to provide effective control and supervision over the design, manufacturing, and use of pressure vessels. .

100% radiographic inspection for Class A and B weld joints, with surface non-destructive testing performed on all weld joints.

Pneumatic pressure should not be used in place of hydraulic pressure unless there are issues such as basic load-bearing requirements. Develop emergency plans and pay attention to safety.

It is necessary to determine whether pressure testing can replace hydraulic testing in accordance with TSG 21； If permitted, the butt joints shall be 100% radiographed or ultrasonically inspected; that is, the vessel shall be designed, manufactured, and inspected with a weld joint factor of 1.0.