Risk assessment report
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There is a short-answer question in the design exam, which reads as follows: What failure modes should generally be considered at various stages during the preparation of a pressure vessel risk assessment report? What factors should generally be considered for failure modes at each stage? Point 150 outlines the failure modes that containers may experience under various operating conditions, and proposes safety measures in terms of material selection, structural design, and manufacturing inspection requirements to prevent such failures from occurring. Can it be understood as the material selection stage, the structural design stage, and the manufacturing inspection stage? But the question clearly states that it is within the process of preparing a risk assessment report, so I’m not quite sure how to answer
Answer it yourself; the answer is as follows: The timing of failure mode identification involves three stages: Identification during the design phase: The main aspects identified are strength, stiffness, stability, brittle fracture, and screw deformation. Factors such as corrosion, etc.: Identification during the manufacturing phase: cold forming, heat treatment, welding processes, pressure testing, and other factors ； Identification of the operating phase: environmental conditions, abnormal operating conditions, and other factors.