: Why is an expansion bellow required in some heat exchanger designs? Additionally, explain the function of the floating head in shell and tube exchangers (it primarily allows for thermal expansion).
Essential Static Equipment Interview Questions and Expert Answers
: What loads must be considered? These include internal/external pressure, weight of the vessel, superimposed static loads from other equipment, and environmental loads like wind and seismic forces. static equipment interview questions
: Expect questions on calculating shell thickness and understanding specific code requirements.
, and how does a restriction orifice control process medium flow? Procedural & Compliance Questions : Why is an expansion bellow required in
Use API 653 guidelines for In-Service Inspection.
uses a design-by-analysis approach. It allows for higher allowable stress values and a lower factor of safety (typically 3.0), but requires rigorous finite element analysis (FEA) and stricter quality control. Procedural & Compliance Questions Use API 653 guidelines
The Expectation: Link between thermodynamics and mechanical failure. Model Answer: "When a high-pressure gas expands through a small orifice (like a leaking valve or a crack in a vessel nozzle), it drops in temperature drastically (isenthalpic expansion). If the gas is wet or contains moisture, this can cause auto-refrigeration of the carbon steel. The metal temperature drops below MDMT, and the vessel can suffer brittle fracture without warning. This is why leaking high-pressure gas lines can explode; the metal freezes and shatters."
Upgrading to duplex stainless steel or nickel alloys.
Static Equipment Engineer Interview Questions in india - Glassdoor
: Common types include fixed-tubesheet, U-tube, and floating head. Fixed-tubesheet is cost-effective but limited by thermal expansion, while floating head exchangers allow for differential thermal expansion and easier cleaning of the tube bundle.