# ISO 8639:2016 — Withdrawn and superseded ISO standards For ISO 8639:2016, item title is Glass-reinforced thermosetting plastics (GRP) pipes and fittings — Test methods for leaktightness and proof of structural design of flexible joints; status code is 9599; successor is ISO 8639:2023; withdrawn / published date is 2016-02-18, recorded from its source on 2026-08-05. - **Identifier:** ISO 8639:2016 _(verified: appears in the quote below)_ - **Item title:** Glass-reinforced thermosetting plastics (GRP) pipes and fittings — Test methods for leaktightness and proof of structural design of flexible joints _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 8639:2023 - **Withdrawn / published date:** 2016-02-18 _(verified: appears in the quote below)_ ## What the source says > 61013,IS,,ISO 8639:2016,Glass-reinforced thermosetting plastics (GRP) pipes and fittings — Test methods for leaktightness and proof of structural design of flexible joints,Tubes et raccords en plastiques thermodurcissables renforcés de verre (PRV) — Méthodes d'essai pour l'étanchéité et preuve de conception structurelle de joint flexible,2016-02-18,2,['23.040.60'],ISO/TC 138/SC 6,9599,[16001],[84121],['en'],9,"
ISO 8639:2016 specifies test methods for flexible non-thrust resistant socket-and-spigot joints with elastomeric sealing elements for buried and above ground glass-reinforced thermosetting plastics (GRP) pipeline applications. It covers methods of test for the leaktightness and res ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).