🔍 Key Concepts

• 46 CFR periodic inspection and testing requirements for boilers and main steam piping • Hydrostatic test pressures as a multiple of maximum allowable working pressure (MAWP) • Whether any size exemptions exist for steam piping hydrostatic tests

💭 Think About

• Look up what 46 CFR actually says about the required test pressure as a ratio of the working or maximum allowable pressure. Is it 1.5 times, 2 times, or something else? • Determine whether the regulation ties the hydrostatic test to a fixed time interval (e.g., every 4 years) or to a different schedule or event. • Check if the regulation makes any exception for piping below a certain nominal size, or if all piping subject to main boiler pressure must be tested.

✅ Before You Answer

• Verify the exact pressure multiple specified (e.g., 1.5 × or 2 × MAWP) in 46 CFR for steam piping subject to boiler pressure. • Confirm whether 46 CFR explicitly mentions a 4‑year interval for hydrostatic testing of steam piping, or if the requirement is different. • Check carefully if 46 CFR actually states that small‑diameter piping (under a certain size) does not need to be hydrostatically tested, or if this is not supported by the text.