Vapor recovery hoses must be tested yearly...

Vapor recovery hoses must be tested yearly at what ratio to their maximum allowable working pressure?

🔍 Key Concepts

• Maximum Allowable Working Pressure (MAWP) and what a safety margin above it is intended to do • Requirements for vapor control system hose testing in 33 CFR part 154 (vapor recovery at marine transfer facilities) • Difference between normal operating pressure and proof-test pressure used for periodic tests

💭 Think About

• Think about why hoses are tested above their normal working pressure—what is the purpose of that margin? • Consider what would be a realistic, safe test pressure that stresses the hose enough to prove its integrity, but not so high that it risks damaging equipment during a routine yearly test. • Recall typical industry standards: for annual hose tests, is the proof pressure usually a little above, double, or many times above the maximum allowable working pressure?

✅ Before You Answer

• Verify in 33 CFR part 154, subpart E (vapor control systems) the specific required test pressure ratio for vapor recovery hoses. • Make sure you are looking at the requirement for yearly (periodic) tests, not initial certification or one-time construction tests. • Confirm that the ratio is expressed directly as a multiple of MAWP (e.g., 1.5 × MAWP, 2 × MAWP, etc.), and match that number to the closest choice.

🔍 Key Concepts

💭 Think About

✅ Before You Answer