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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

API STD 520 (Tenth Edition 2020) Sizing, Selection, and Installation of Pressure-relieving Devices, Part I — Sizing and Selection
API STD 526 (Eighth Edition 2023) Flanged Steel Pressure-relief Valves

ISO 5167-1 (Third Edition 2022) 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 (Second Edition 2022) 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 (Third Edition 2022) 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 (Second Edition 2022) 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 (Second Edition 2022) 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 (Second Edition 2022) 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 (Fourth Edition 2023) 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 series
ISO/TR 9464 (Third Edition 2023) Guidelines for the use of ISO 5167:2022

IEC TR 61831 (Edition 2.0 2011) On-line analyser systems - Guide to design and installation