Equipment Interview Questions Updated [repack] — Static
Q12: Name four common Non-Destructive Testing (NDT) methods used on static equipment welds.
: Be familiar with maintenance procedures, such as channel head blinding and deep blinding operations for shell and tube exchangers. 3. Storage Tanks & Flanges (API 650/620)
Q3: What is the purpose of a companion flange, and where is it used?
Q6: How do you select the correct gasket type for a static piping system?
What is the standard Hydrostatic Test pressure?Per ASME Section VIII Div 1, the standard hydrotest pressure is 1.3 times the MAWP, adjusted for the temperature difference between the test and design conditions. What are the common NDT methods for static equipment? Radiographic Testing (RT): For internal weld defects. static equipment interview questions updated
) require PWHT regardless of thickness to prevent environmental stress corrosion cracking (SCC). Technical Interview Tips for Success
: Define secondary stress (often self-equilibrating stresses like thermal stress) and explain its significance in flange design.
Q: How do you evaluate nozzle reinforcement requirements? A: Use code formulas (ASME VIII) comparing required reinforcement area (Areq) to available area (Aavail) provided by surrounding vessel metal, collars, and pads. If Aavail < Areq, add reinforcement like pads, increased shell thickness, or alternative arrangements.
Q3: What is the difference between ASME Section VIII Division 1 and Division 2? Q12: Name four common Non-Destructive Testing (NDT) methods
Answer: Corrosion allowance = 0.2*15 = 3.0 mm. Use fabrication min 6 mm → recommended thickness = 6 mm + 3 mm = 9 mm.
: Be prepared to list and compare types like shell and tube, plate and frame, and spiral heat exchangers. Material & Safety Analysis
The choice of head depends on pressure requirements, cost, and space constraints:
“You are inspecting a 40-year-old atmospheric storage tank with a floating roof. The shell shows no visible thinning, but UT readings indicate scattered laminations. The client wants to skip internal inspection for another five years. What do you say, and what specific damage mechanism are you worried about that isn’t in the original API 653 checklist?” Storage Tanks & Flanges (API 650/620) Q3: What
Whenever you answer a design or inspection question, explicitly mention the governing code (e.g., "According to ASME Section VIII Division 1..." ). This instantly demonstrates your industry credibility.
What is the company in? (e.g., Refinery, Cryogenic, Power Plant) What is your experience level ?
Question: Explain the difference between Hydrostatic Testing and Pneumatic Testing. When would you prefer the latter?
Q: How do you manage repairs and alterations to ASME vessels? A: Follow ASME Section VIII repair/alteration rules and applicable local regulations. Evaluate proposed changes, perform necessary calculations, NDE, and re-test (hydrostatic). Ensure authorized alteration procedures, re‑certify as needed, and update documentation.
