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Standard Type : Main
Document No : ISO 1438:2017
Document Year : 2017
Pages : 60
Edition : 3
Section Volume : Flow measurement structures (ISO/TC 113/SC 2.)
ISO 1438:2017 defines the requirements for the use of rectangular and triangular (V-notch) thin-plate weirs for the measurement of flow of clear water in open channels under free flow conditions. It includes the requirements for the use of full-width rectangular thin-plate weirs in submerged (drowned) flow conditions.