# ISO 7686:1992 — Withdrawn and superseded ISO standards For ISO 7686:1992, item title is Plastics pipes and fittings — Opacity — Test method; status code is 9599; successor is ISO 7686:2005; withdrawn / published date is 1992-06-18, recorded from its source on 2026-08-05. - **Identifier:** ISO 7686:1992 _(verified: appears in the quote below)_ - **Item title:** Plastics pipes and fittings — Opacity — Test method _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 7686:2005 - **Withdrawn / published date:** 1992-06-18 _(verified: appears in the quote below)_ ## What the source says > 14505,IS,,ISO 7686:1992,Plastics pipes and fittings — Opacity — Test method,Tubes et raccords en matières plastiques — Opacité — Méthode d'essai,1992-06-18,1,"['23.040.45','23.040.20']",ISO/TC 138/SC 5,9599,,[41308],"['en','fr']",3,"

The principle consists in measuring the light flux passing through a test piece cut from a pipe or fitting as a percentage of the incident light flux on the test piece. The standard lays down the maximum acceptable limit for the light which may pass through the wall of the pipe or fitting, if the product standard specifies that they shall be opaque.

" ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).