Static Equipment Interview Questions | Chrome TOP-RATED |

The Procedure: (ASME VIII UG-99)

| Code/Standard | Application | |---------------|-------------| | ASME Sec. VIII Div.1/2 | Pressure vessel design & fabrication | | ASME Sec. VIII Div.3 | High pressure vessels (>10,000 psi) | | API 510 | In-service pressure vessel inspection | | API 570 | Piping inspection | | API 653 | Tank inspection, repair, and alteration | | API 579 | Fitness-for-service (FFS) | | TEMA | Shell & tube heat exchangers | | EN 13445 | European pressure vessel code | | ISO 13706 | Air-cooled heat exchangers |

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Answer: PWHT involves heating the welded component to a specific temperature (typically 1100–1200°F for carbon steel) and controlled cooling. It relieves residual stresses and improves toughness. Mandatory in ASME Sec. VIII: static equipment interview questions

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Answer: TEMA classifies by front head, shell type, and rear head:

Answer: Using the circumferential (hoop) stress formula: [ t = \fracP \times RS \times E - 0.6P + C.A. ] Where: The Procedure: (ASME VIII UG-99) | Code/Standard |

Common interviewer trap: Remember to add corrosion allowance after calculating the minimum thickness, not before.

Answer: HIC occurs in carbon steel exposed to wet H₂S (sour service). Hydrogen atoms diffuse into steel and recombine at inclusions, creating internal cracks. Prevention: Answer: PWHT involves heating the welded component to

Static equipment is not just vessels; heat exchangers are a massive part of the field.

Answer: Use API 579 Level 2 or 3: