: Roles and responsibilities for inspectors, including non-destructive testing (NDT) like Ultrasonic or Radiographic testing. 3. Essential Professional Skills
NACE-compliant materials (e.g., MR0175/ISO 15156) are required for "sour service" (containing hydrogen sulfide) to prevent sulfide stress cracking (SSC) and hydrogen-induced cracking. How does "corrosion allowance" affect design? static equipment interview questions
Reference API 510. You would calculate the remaining life using the formula involving design pressure, current thickness, and corrosion rate. You might also mention "Fitness-For-Service" (API 579), which allows engineers to determine if a flaw is acceptable to remain in service or if it requires repair, rather than simply condemning the equipment. How does "corrosion allowance" affect design
: Which specific paragraph or section of the ASME code is used to calculate the required thickness of a shell? Primary stress (e.g.
“Thickness alone is necessary, but not sufficient.”
: Explain why an expansion bellow is required in certain heat exchanger designs.
Primary stress (e.g., hoop stress) is generated by external loads and is necessary for equilibrium; secondary stress (e.g., thermal stress) is self-limiting and caused by local structural constraints. 2. Pressure Vessels & Design