Piping Piping Codes and Standards

Question 1

Which ASME code governs the design of process piping in chemical and refinery plants in the US?

Accepted Answer

ASME B31.3 — Process Piping

Answer

ASME B31.1 — Power Piping

Answer

ASME B31.4 — Pipeline Transportation Systems for Liquids

Answer

ASME B31.8 — Gas Transmission and Distribution Piping

Question 2

Under ASME B31.3, what is the minimum required hydrotest pressure expressed as a multiple of design pressure?

Accepted Answer

1.5 times the design pressure

Answer

1.1 times the design pressure

Answer

2.0 times the design pressure

Answer

2.5 times the design pressure

Question 3

What does API 570 cover?

Accepted Answer

Inspection, repair, alteration, and rerating of in-service piping systems

Answer

Design of new process piping systems

Answer

Installation of underground fuel pipelines

Answer

Qualification of pipe welders

Question 4

What is the primary purpose of ASME B16.5?

Accepted Answer

To provide dimensional and pressure-temperature rating standards for pipe flanges and flanged fittings

Answer

To specify pipe wall thickness schedules

Answer

To govern welding procedures for pipe joints

Answer

To define pipe material grades and chemical composition

Question 5

Under ASME B31.3, what is a 'Category D' fluid service?

Accepted Answer

Non-flammable, non-toxic service where design temperature is from -29°C to 186°C and gauge pressure does not exceed 1035 kPa

Answer

High-pressure service above 1500 psig

Answer

Underground buried piping only

Answer

Any cryogenic service below -100°F

Question 6

Which API standard provides guidance on corrosion under insulation (CUI) inspection?

Accepted Answer

API 583

Answer

API 570

Answer

API 581

Answer

API 574