What is the difference between ASME Section VIII, Division 1 and Division 2?

) that represents the quality of the weld and the amount of non-destructive testing (NDT) performed on the weld joint. It accounts for potential defects, with meaning 100% radiography is performed. Part 2: Heat Exchanger Specific Questions (TEMA)

Utilizes a design-by-analysis approach. It allows for higher allowable stress values and a lower safety factor (typically 3.0). It requires more rigorous stress analysis, including Finite Element Analysis (FEA), but results in thinner, lighter, and more cost-effective vessels for high-pressure applications. 3. Materials and Corrosion

Channel and removable cover front head, E-type single-pass shell, fixed tubesheet rear head.

What factors influence material selection for static equipment?

Occurs at ambient temperatures in wet H2Scap H sub 2 cap S

Pressure vessels are leak-tight containers designed to hold liquids or gases at pressures substantially different from the ambient pressure.

The Expectation: Fitness-for-Service (FFS) – API 579. Model Answer: "First, I would measure the actual depth of the gouge with a pit gauge or UT (Ultrasonic Testing). Then, I would classify it. If it's in a low-stress area, the remaining thickness might still exceed the required thickness from the original calculations. If it is critical, I would perform a Level 1 or Level 2 FFS assessment per API 579 . I would calculate the remaining ligament efficiency and compare MAWP to the operating pressure. Often, grinding the gouge smooth to remove stress risers (sharp corners) and running a calculation is acceptable without welding."

Uses a "Design-by-Rule" approach. It features higher safety factors (typically 3.5), resulting in thicker walls. It requires less complex calculations and is cheaper for standard pressure applications.

Blistering is a localized bulge caused by internal gas pressure trapped between laminations or between a cladding and base metal. Common causes:

Floating heads are preferred for high-temperature differences where thermal expansion is significant, as one end of the tube bundle is free to move. They also allow for easier bundle removal and cleaning. Which fluid should go in the tubes versus the shell?

How do you protect a pressure vessel from overpressure scenarios?