2. What are the key design parameters for a pressure vessel? The primary design parameters include: Design Pressure (Internal and External). Design Temperature (Maximum and Minimum/MDMT). Material of Construction (MOC). Corrosion Allowance (CA). Joint Efficiency (RT-1, RT-2, etc.). Design Life.
RBI is a methodology that focuses inspection resources on equipment with the highest risk (likelihood of failure × consequence of failure) rather than relying solely on time-based schedules. Explain API 510 and API 570.
PWHT is the heating of a weldment to a high temperature to relieve residual stresses induced by welding, reducing the risk of brittle fracture or stress corrosion cracking. 5. Technical Scenario-Based Questions static equipment interview questions
8. Explain the phenomenon of Hydrogen Induced Cracking (HIC). HIC occurs in wet, sour gas environments ( H2Scap H sub 2 cap S
Codes specify the number and size of manholes or handholes based on the vessel's diameter to allow for internal safety inspections. How do NACE materials differ for hydrogen service? Design Temperature (Maximum and Minimum/MDMT)
Cracking resulting from cyclic temperature fluctuations. If you want to prepare further for your interview, tell me:
14. What are common damage mechanisms found in static equipment? Joint Efficiency (RT-1, RT-2, etc
Baffles support the tubes, preventing sagging and vibration, and force the shell-side fluid to flow across the tubes, increasing heat transfer efficiency. 4. Inspection, Maintenance, and API Standards What is Risk-Based Inspection (RBI) per API 580/581?
is identified by Nominal Pipe Size (NPS) and Schedule (wall thickness). It is primarily used to transport fluids and gases.
The choice between Division 1 and Division 2 depends on the design pressure, economic factors, and operational complexity: ASME Section VIII, Division 1 ASME Section VIII, Division 2 Design by Formula (approximate formulas). Design by Analysis (uses Finite Element Analysis). Safety Factor Higher safety factor (typically 3.5 on tensile strength). Lower safety factor (typically 3.0 on tensile strength). Material Weight Thicker walls, leading to heavier vessels. Thinner walls, leading to lighter vessels. Cost & Effort Lower engineering cost; higher material cost.