# ISO/TR 15377:2018 — Withdrawn and superseded ISO standards For ISO/TR 15377:2018, item title is Measurement of fluid flow by means of pressure-differential devices — Guidelines for the specification of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plates, nozzles and Venturi tubes beyond the scope of ISO 5167; status code is 9599; successor is ISO/TR 15377:2023; withdrawn / published date is 2018-01-05, recorded from its source on 2026-08-05. - **Identifier:** ISO/TR 15377:2018 _(verified: appears in the quote below)_ - **Item title:** 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 _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO/TR 15377:2023 - **Withdrawn / published date:** 2018-01-05 _(verified: appears in the quote below)_ ## What the source says > 68740,TR,,ISO/TR 15377:2018,"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","Mesurage du débit des fluides au moyen d'appareils déprimogènes — Lignes directrices pour la spécification des diaphragmes, des tuyères et des tubes de Venturi non couverts par l'ISO 5167",2018-01-05,3,['17.120.10'],ISO/TC 30/SC 2,9599,[40029],[85585],"['en','fr']",31,"

ISO/TR 15377:2018 describes the geometry and method of use for conical-entrance orifice plates, quarter-circle orifice plates, eccentric orifice plates and Venturi tubes with 10,5° convergent angles. Recommendations are ## Source - https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv Last verified: 2026-08-05. Review by: 2027-02-01. Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).