A periodic hydrostatic test is being...

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Question 1 of 2066636eee28f7522a1c51ef2e

A periodic hydrostatic test is being performed on a main steam line between the boiler drum and the throttle valve which has a maximum allowable working pressure of 960 psig. In accordance with 46 CFR Subchapter F (Marine Engineering), what is the required hydrostatic test pressure for this procedure?

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Question 1 of 20

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🔍 Key Concepts

• 46 CFR Subchapter F requirements for hydrostatic tests on boilers and main steam lines • The relationship between maximum allowable working pressure (MAWP) and required test pressure • Typical safety factor (multiplier) used when hydrostatically testing steam lines or boilers

💭 Think About

• Look at each answer choice and divide it by the MAWP (960 psig). What multiplier does each option represent? • Think about what safety factor 46 CFR Subchapter F requires for hydrostatic tests on main steam lines—is it just slightly above MAWP, significantly higher, or extremely high? • Ask yourself: does Subchapter F use the same multiplier commonly used in boiler and pressure vessel codes for hydrostatic tests, or a very different one?

✅ Before You Answer

• Confirm in 46 CFR Subchapter F what multiple of MAWP is required for hydrostatic testing of main steam lines between the drum and throttle valve. • Verify that the selected pressure is greater than MAWP but not so high that it would be unreasonable for routine hydrostatic testing. • Double-check that the test pressure you choose matches a standard factor (e.g., 1.1×, 1.25×, 1.5×, 2.0×) applied to 960 psig.

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