In the manufacturing process of Q345R pressure vessel
, many components are connected by welding. The arrangement of welds and the quality of welding directly affect the quality of pressure vessels, especially the weld defects and stress concentration. During the welding process, pay attention to the arrangement of the welds, the intersection and overlap of the welds are unavoidable. Therefore, stress analysis of the pressure vessel is required before the operation, and computer software can be used for auxiliary calculation. The key to affecting the quality of welding is the professional level of the operators. Therefore, it is necessary to pay attention to the management of the welding staff, and review the qualifications and related qualifications to ensure the certification.
Stress corrosion cracking is caused by the interaction of stress and corrosive environment. In the actual operation process, stress can not be avoided, and there is no way to get rid of the corrosive environment. Therefore, it is necessary to solve this problem from the material itself. When designing the Q345R pressure vessel, it is necessary to fully consider the stress corrosion problem and select the appropriate material. In addition, the structure can be treated, heat treated, anticorrosive, etc., to minimize stress corrosion; the possibility of cracks.