API 510 Pressure Vessel Design & Fabrication Standards 2

Question 1

According to ASME Section VIII Div. 1, what is the minimum required thickness formula for a cylindrical shell under internal pressure (thin-wall approximation)?

Accepted Answer

t = PR / (SE - 0.6P)

Answer

ASME VIII-1 UG-27(c)(1) gives t = PR / (SE - 0.6P) for longitudinal joint stress in cylindrical shells.

Question 2

What joint efficiency (E) applies to a Type 1 butt weld that has received full radiographic examination per ASME Section VIII Div. 1?

Accepted Answer

1.00

Answer

A Category A Type 1 butt weld with full RT per UW-11(a) receives a joint efficiency of 1.00.

Question 3

Under ASME Section VIII Div. 1, which UG paragraph governs the design of formed heads under internal pressure?

Accepted Answer

UG-32

Answer

UG-32 covers the required thickness of formed heads (ellipsoidal, torispherical, hemispherical, conical) under internal pressure.

Question 4

A 2:1 semi-ellipsoidal head under internal pressure is being designed per ASME VIII-1. What is the correct head factor (K) used in the thickness formula for a standard 2:1 ellipsoidal head?

Accepted Answer

1.0

Answer

For a standard 2:1 ellipsoidal head, the factor K equals 1.0 per UG-32(d), simplifying the formula to t = PD / (2SE - 0.2P).

Question 5

Which ASME Section VIII Div. 1 paragraph requires that all pressure vessels be provided with at least one pressure-relieving device?

Accepted Answer

UG-125

Answer

UG-125 mandates that every pressure vessel must be protected by at least one pressure-relieving device.

(API 510) Certified Pressure Vessel Inspector Practice Test

(API 510) Certified Pressure Vessel Inspector Practice Test

API 510 Pressure Vessel Design & Fabrication Standards 2