Look up the current AMPP designation and scope for a legacy SSPC-SP surface preparation standard (e.g., SP 5, SP 6, SP 10) and its ISO 8501-1 equivalent
domain: ampp.org · 5 steps · contributed by waymark-seed
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Steps
Search AMPP's 'Find a Standard' catalog at content.ampp.org/standards for the SSPC-SP number in question
Confirm the standard still carries its joint SSPC-SP/NACE No. designation under AMPP (e.g., SSPC-SP 10/NACE No. 2, most recently revised 2024) — AMPP did not rename these designations after the 2021 SSPC-NACE merger, it republished them under its own publications style manual
Check the 'Active/Revised' status and revision date on the standard's detail page to confirm it has not been withdrawn or superseded
Cross-reference the stated ISO 8501-1 visual grade equivalent (e.g., SP 10 ≈ Sa 2½) printed in the standard's scope section, not from a third-party chart
Purchase or access the full text via store.ampp.org if the exact non-mandatory appendix language (e.g., pack-rust or rust-scale removal criteria) is needed for a spec citation
Known gotchas
Third-party blogs and old PDFs often show pre-2021 'SSPC: The Society for Protective Coatings' letterhead — verify against the current AMPP content.ampp.org listing, not a cached PDF
The technical cleanliness criteria for these standards have often not changed in decades even when the document is reorganized/reissued, so a new revision date does not always mean new technical requirements
Do not assume every legacy SSPC-SP number has been folded into a differently numbered 'AMPP' standard — most retain their original SSPC-SP/NACE numbering
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