According to 46 CFR Part 56, carbon steel...

🔍 Key Concepts

• 46 CFR Part 56 – Piping Systems and Appurtenances (focus on bolt material requirements) • Difference in service limits between carbon steel and alloy steel in terms of temperature and pressure • How material selection rules are usually written: often as a function of temperature limits rather than pressure for bolt materials

💭 Think About

• Is the regulation you’re being asked about written in terms of maximum temperature, maximum pressure, or both? Look at how the question is worded. • Between temperature and pressure, which property usually drives the change from carbon steel to alloy steel bolts in high‑temperature piping systems? • Think about the typical temperature range where ordinary carbon steel starts to lose strength significantly and might require alloy materials.

✅ Before You Answer

• Confirm in 46 CFR Part 56 whether the specific allowance for carbon steel bolts is stated as a limit on temperature or pressure. • If it is a temperature limit, compare the two temperature choices and ask which one looks more consistent with a conservative limit for carbon steel in continuous service. • Make sure you are not mixing up general system design limits with the specific wording used for bolt material substitution in the regulation.

According to 46 CFR Part 56, carbon steel bolts rather than alloy steel bolts may be used to make up a flange if the normal operating __________.

temperature does not exceed 550°F

temperature does not exceed 750°F

pressure does not exceed 300 psi

pressure does not exceed 500 psi

🔍 Key Concepts

💭 Think About

✅ Before You Answer