What is the ASME standard for valve testing?
What is the ASME standard for valve testing?
The ASME publications and codes that cover valve testing are B16.34, the Boiler & Pressure Vessel Code sections, PTC, and performance-test advice.
ASME doesn’t have a single “valve-testing” standard like API does, however there are a few ASME publications that are very important for valve pressure/strength and testing requirements: ASME B16.34 lists the pressure-temperature ratings, materials, and minimum test requirements that many manufacturers use for strength and leakage tests. The Boiler & Pressure Vessel Code (Sections I and VIII) lists the tests and criteria that must be met for pressure-relief and pressure-containing components (so relief valve testing often refers to the B&PV Code). In practice, a mix of ASME B16.34, API 598 for inspection and leakage acceptance, and project-specific QA/QC procedures usually set the valve test pressures and the types of tests (shell/hydrostatic, seat leakage, strength). For special cases, ASME Performance Test Codes (PTC) and ASME guidance documents may also be used. ASME Section VIII or Section I and separate ASME PRV performance specifications define the rules for calibrating and testing safety valves (PRVs). In short, use ASME B16.34 for dimensional/pressure-rating/test baselines, and then add API 598 or project PAT for leakage acceptance and test procedures.
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