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2. What is the difference between a 2:1 Ellipsoidal head and a Torispherical head?
For standard thickness calculations in Division 1, engineers typically reference Part UG (specifically UG-27 for cylindrical shells).
If you can tell me the of static equipment (e.g., design, inspection, project management) you are focusing on, I can provide a more tailored list of questions . Good luck!
Answer: If the vessel is subjected to external pressure (e.g., steam purging, liquid draining, or process malfunction), it requires vacuum design to prevent buckling.
TEMA uses a three-letter system to define heat exchanger types based on the front head, shell type, and rear head:
(covering pressure vessels, heat exchangers, and storage tanks), focus on ASME Section VIII Div 1 API standards practical maintenance/design scenarios
Focuses on the inspection, repair, alteration, and reconstruction of existing storage tanks.
Q: What practical differences matter when working across ASME and EN standards? A: Differences include allowable stress tables, testing requirements, fabrication tolerances, and documentation. EN may require different material grades and marking; vessel concepts such as design factor and partial safety factors differ. Always confirm client/site jurisdiction and contractually required code.
MAWP (Maximum Allowable Working Pressure) is the maximum pressure at which the weakest component of a pressure vessel can operate at its designated temperature (usually at the top of the vessel). Design Pressure is a slightly higher value (typically 10% or 30 psi over MAWP) used for calculating the vessel’s thickness to account for pressure relief device accumulation. Pro Tip: Modern software (PV Elite, Compress) calculates MAWP automatically. Be ready to discuss how corrosion allowance affects MAWP over time.
is the standard for evaluating the structural integrity of in-service equipment. If a vessel has corrosion, a crack, or a dent, you don't just scrap it. You use API 579 calculations to determine:
One tube sheet is free to move, allowing for high differential thermal expansion.