SPED Piping Design Principles & Standards 3

Question 1

Which document defines the piping material requirements for a specific service, including pipe grade, fittings, and valves?

Accepted Answer

Piping Material Specification (PMS)

Answer

A Piping Material Specification (PMS) or Piping Class document defines all materials, ratings, end connections, and components approved for each service class.

Question 2

What is the standard flange pressure-temperature rating class used for low-pressure steam service in many refinery applications?

Accepted Answer

Class 150

Answer

ASME B16.5 Class 150 flanges are commonly used for low-pressure steam and moderate-pressure services in refineries and process plants.

Question 3

On a P&ID, what symbol is typically used to represent a control valve?

Accepted Answer

A bow-tie or butterfly shape with a circle on top indicating the actuator

Answer

Control valves on P&IDs are shown as a bow-tie (globe valve body) symbol with an actuator circle above, per ISA 5.1 symbology standards.

Question 4

What is the recommended slope for steam condensate return lines to ensure proper drainage?

Accepted Answer

1/8 inch per foot minimum

Answer

Steam condensate lines are typically sloped a minimum of 1/8 inch per foot in the direction of flow to prevent water hammer and ensure proper drainage.

Question 5

Which fitting type provides the strongest and most leak-resistant joint for high-pressure piping?

Accepted Answer

Butt weld fitting

Answer

Butt weld fittings, when properly welded, create a full-penetration joint that is as strong as the pipe itself and is preferred for high-pressure, high-temperature service.

(SPED) Society of Piping Engineers and Designers Certification Practice Test

(SPED) Society of Piping Engineers and Designers Certification Practice Test

SPED Piping Design Principles & Standards 3