# ISO 12230:1996 — Withdrawn and superseded ISO standards For ISO 12230:1996, item title is Polybutene (PB) pipes — Effect of time and temperature on the expected strength; status code is 9599; successor is ISO 12230:2012; withdrawn / published date is 1996-12-26, recorded from its source on 2026-08-05. - **Identifier:** ISO 12230:1996 _(verified: appears in the quote below)_ - **Item title:** Polybutene (PB) pipes — Effect of time and temperature on the expected strength _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 12230:2012 - **Withdrawn / published date:** 1996-12-26 _(verified: appears in the quote below)_ ## What the source says > 21321,IS,,ISO 12230:1996,Polybutene (PB) pipes — Effect of time and temperature on the expected strength,Tubes en polybutène (PB) — Influence du temps et de la température sur la résistance espérée,1996-12-26,1,['23.040.20'],ISO/TC 138/SC 5,9599,,[57242],"['en','fr']",6,"

Gives the minimum values for expected strength as a function of time and temperature in the form of reference lines, for use in calculations on polybutene pipes.

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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).