Standards

• IEC 60534-2-1 (Edition 2.0 2011) Industrial-process control valves – Part 2-1: Flow capacity – Sizing equations for fluid flow under installed conditions
• IEC 60534-8-3 (Edition 3.0 2010) Industrial-process control valves – Part 8-3: Noise considerations – Control valve aerodynamic noise prediction method
• IEC 60534-8-4 (Edition 3.0 2015) Industrial-process control valves – Part 8-4: Noise considerations – Prediction of noise generated by hydrodynamic flow

• ISO 5167-1 (Second Edition 2003) Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 1: General principles and requirements
• ISO 5167-2 (First Edition 2003) Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 2: Orifice plates
• ISO 5167-3 (First Edition 2003) Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 3: Nozzles and Venturi nozzles
• ISO 5167-4 (First Edition 2003) Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 4: Venturi tubes
• ISO 5167-5 (First Edition 2016) Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 5: Cone meters
• ISO 5167-6 (First Edition 2019) Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 6: Wedge meters
• ISO/TR 15377 (Third Edition 2018) Measurement of fluid flow by means of pressure differential devices — Guidelines for the specification of orifice plates, nozzles and Venturi tubes beyond the scope of ISO 5167

• API STD 520 (Ninth Edition 2007) Sizing, Selection, and Installation of Pressure-relieving Devices, Part I — Sizing and Selection
• API STD 526 (Seventh Edition 2017)^† Flanged Steel Pressure-relief Valves

• ASME PTC 19.3 TW:2016 Thermowells - Performance Test Codes