According to regulations, what is the...

Question 1 / 2707066636eef28f7522a1c51f66e

Question 1 of 2707066636eef28f7522a1c51f66e

According to regulations, what is the minimum nominal pipe size for a fuel oil service tank vent line?

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Question 1 of 27070

Q

According to regulations, what is the minimum nominal pipe size for a fuel oil service tank vent line?

🔍 Key Concepts

• Fuel oil system venting requirements in 46 CFR • Purpose of a service tank vent line on fuel systems • How minimum nominal pipe size is chosen to safely relieve pressure

💭 Think About

• Which regulation part in 46 CFR covers fuel oil tanks and vent piping? Check that first, then look specifically for service tanks. • Think about why vents must be large enough: what happens during filling, thermal expansion, or fire exposure if the vent is undersized? • Compare the listed sizes with what you’d expect for a vent that must handle worst‑case pressure without exceeding tank design limits.

✅ Before You Answer

• Verify in 46 CFR (Subchapter F or relevant subchapter for your vessel type) the exact table or paragraph for fuel oil service tank vent sizes. • Confirm the regulation is talking about service tank vent lines, not overflow lines or other tank types. • Make sure you’re looking at nominal pipe size, not inside diameter or area equivalence.

Question 1 of 27070

Q

According to regulations, what is the minimum nominal pipe size for a fuel oil service tank vent line?

A

1.5 inches

B

2 inches

C

2.5 inches

D

3 inches

Question 1 / 2707066636eef28f7522a1c51f66e

Question 1 of 2707066636eef28f7522a1c51f66e

According to regulations, what is the minimum nominal pipe size for a fuel oil service tank vent line?

Back

Question 1 of 27070

Q

According to regulations, what is the minimum nominal pipe size for a fuel oil service tank vent line?

🔍 Key Concepts

• Fuel oil system venting requirements in 46 CFR • Purpose of a service tank vent line on fuel systems • How minimum nominal pipe size is chosen to safely relieve pressure

💭 Think About

• Which regulation part in 46 CFR covers fuel oil tanks and vent piping? Check that first, then look specifically for service tanks. • Think about why vents must be large enough: what happens during filling, thermal expansion, or fire exposure if the vent is undersized? • Compare the listed sizes with what you’d expect for a vent that must handle worst‑case pressure without exceeding tank design limits.

✅ Before You Answer

• Verify in 46 CFR (Subchapter F or relevant subchapter for your vessel type) the exact table or paragraph for fuel oil service tank vent sizes. • Confirm the regulation is talking about service tank vent lines, not overflow lines or other tank types. • Make sure you’re looking at nominal pipe size, not inside diameter or area equivalence.