Piping Piping Design and Layout 2 — Questions and Answers
Question 1: What is the purpose of a pipe support guide in a piping system?
- To allow axial movement while restraining lateral movement (Correct answer)
- To prevent all pipe movement
- To transmit weight load to the structure
- To isolate vibration from the pipe
Correct answer: To allow axial movement while restraining lateral movement
A pipe guide directs the pipe to move only along its axis (axially) while preventing lateral displacement.
Question 2: Which type of pipe support is used when the load must be transmitted to the structure while allowing vertical movement?
- Rigid hanger
- Spring hanger (Correct answer)
- Anchor
- Guide
Correct answer: Spring hanger
Spring hangers support pipe weight while allowing controlled vertical movement due to thermal expansion or contraction.
Question 3: What does the term 'dead leg' mean in piping design?
- A pipe segment with no flow that can accumulate stagnant fluid (Correct answer)
- A pipe that is no longer in service
- A drain connection at the lowest point
- A pipe run with excessive pressure drop
Correct answer: A pipe segment with no flow that can accumulate stagnant fluid
A dead leg is a section of piping where fluid stagnates because there is no flow, creating potential for contamination, corrosion, or biological growth.
Question 4: In a plot plan, what does 'North Arrow' indicate?
- The direction of prevailing wind
- The orientation of the facility relative to true or plant north (Correct answer)
- The location of the nearest utility connection
- The direction of process fluid flow
Correct answer: The orientation of the facility relative to true or plant north
The North Arrow on a plot plan establishes the reference orientation for locating equipment and structures within the facility.
Question 5: What is the minimum recommended headroom clearance for pipe racks over roads inside a plant?
- 3.5 m
- 4.5 m (Correct answer)
- 5.5 m
- 6.5 m
Correct answer: 4.5 m
A minimum clearance of 4.5 m over roads is typically required to allow passage of maintenance vehicles and mobile equipment.
Question 6: What is a 'line list' in a piping project?
- A list of all pipe fittings on a project
- A document tabulating all pipe lines with their design conditions, material class, and insulation requirements (Correct answer)
- A schedule of pipe support installation dates
- A record of hydrostatic test pressures
Correct answer: A document tabulating all pipe lines with their design conditions, material class, and insulation requirements
The line list is a master register of every pipe line number along with its process conditions, pipe class, size, and special requirements.
Piping Piping Design and Layout 2
What is the purpose of a pipe support guide in a piping system?