# ISO 11666:2010 — Withdrawn and superseded ISO standards For ISO 11666:2010, item title is Non-destructive testing of welds — Ultrasonic testing — Acceptance levels; status code is 9599; successor is ISO 11666:2018; withdrawn / published date is 2010-12-03, recorded from its source on 2026-08-05. - **Identifier:** ISO 11666:2010 _(verified: appears in the quote below)_ - **Item title:** Non-destructive testing of welds — Ultrasonic testing — Acceptance levels _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 11666:2018 - **Withdrawn / published date:** 2010-12-03 _(verified: appears in the quote below)_ ## What the source says > 50685,IS,,ISO 11666:2010,Non-destructive testing of welds — Ultrasonic testing — Acceptance levels,Contrôle non destructif des assemblages soudés — Contrôle par ultrasons — Niveaux d'acceptation,2010-12-03,1,['25.160.40'],ISO/TC 44/SC 5,9599,,[69610],"['en','fr']",17,"

ISO 11666:2010 specifies ultrasonic acceptance levels 2 and 3 for full penetration welded joints in ferritic steels, which correspond to ISO 5817 quality levels B and C. An acceptance level corresponding to ISO 5817 quality level D is not included in ISO 11666:2010 as ultrasonic testing is generally not requested for this weld quality.

These acceptance levels are applicable to testing carried out in accordance with ISO ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).