{"id":13182,"date":"2026-05-28T01:49:32","date_gmt":"2026-05-28T01:49:32","guid":{"rendered":"https:\/\/hlh-js.com\/?p=13182"},"modified":"2026-05-28T01:49:32","modified_gmt":"2026-05-28T01:49:32","slug":"sspc-sp5-sp6-sp10-vs-iso-sa-1-sa-2-sa-2-5-sa-3-complete-cross-reference","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/fr\/resource\/blog\/sspc-sp5-sp6-sp10-vs-iso-sa-1-sa-2-sa-2-5-sa-3-complete-cross-reference\/","title":{"rendered":"SSPC SP5 \/ SP6 \/ SP10 vs ISO Sa 1 \/ Sa 2 \/ Sa 2.5 \/ Sa 3: Complete Cross-Reference"},"content":{"rendered":"<div class=\"hlh-art\">\n\n<style>\n  .hlh-art {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", \"Helvetica Neue\", Arial, sans-serif;\n    color: #1f2a37; line-height: 1.72; font-size: 16.5px;\n    max-width: 1080px; margin: 0 auto; padding: 0 4px; box-sizing: border-box;\n  }\n  .hlh-art *, .hlh-art *::before, .hlh-art *::after { box-sizing: border-box; }\n  .hlh-art h1, .hlh-art h2, .hlh-art h3, .hlh-art h4 {\n    color: #0f3057; 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border: none; margin-top: 0; font-size: 1.45rem; position: relative; padding: 0; }\n  .hlh-art-cta p { color: #d6dee8; max-width: 620px; margin: 8px auto 22px; position: relative; }\n  .hlh-art-cta-button {\n    display: inline-block; background: #e8782e; color: #fff !important;\n    padding: 13px 32px; border-radius: 50px; font-weight: 700;\n    font-size: 0.98rem; border: none !important;\n    box-shadow: 0 8px 22px rgba(232,120,46,0.35); position: relative;\n    transition: all 0.2s ease;\n  }\n  .hlh-art-cta-button:hover { background: #c75d12; color: #fff !important; transform: translateY(-2px); }\n\n  .hlh-art-pillarback {\n    background: #eef3f9; border-left: 4px solid #0f3057;\n    padding: 16px 22px; border-radius: 6px; margin: 24px 0;\n    font-size: 0.95rem;\n  }\n  .hlh-art-pillarback strong { color: #0f3057; }\n\n  @media (max-width: 780px) {\n    .hlh-art { font-size: 16px; }\n    .hlh-art h1, .hlh-art-hero h1 { font-size: 1.7rem; }\n    .hlh-art h2 { font-size: 1.3rem; }\n    .hlh-art-hero { padding: 30px 22px; }\n    .hlh-art-toc ol { columns: 1; }\n    .hlh-art-steps { grid-template-columns: repeat(2, 1fr); }\n    .hlh-art-grid2, .hlh-art-grid3, .hlh-art-related-grid { grid-template-columns: 1fr; }\n    .hlh-art-cta { padding: 30px 22px; }\n  }\n<\/style>\n\n<section class=\"hlh-art-hero\">\n  <div class=\"hlh-art-meta-row\">\n    <span class=\"hlh-art-tag\">Standards Reference<\/span>\n    <span class=\"hlh-art-date\">Published &middot; May 2026<\/span>\n  <\/div>\n  <h1>SSPC SP5 \/ SP6 \/ SP10 vs ISO Sa 1 \/ Sa 2 \/ Sa 2.5 \/ Sa 3: Complete Cross-Reference<\/h1>\n  <p class=\"hlh-art-lede\">A definitive cross-reference between the American SSPC surface preparation standards, the international ISO 8501-1 Sa grades, and the matching NACE designations \u2014 with the visual criteria, acceptance language, and typical use cases for each cleanliness grade.<\/p>\n<\/section>\n\n<aside class=\"hlh-art-summary\">\n  <h2>Key Takeaways<\/h2>\n  <ul>\n    <li>SSPC SP 5 = NACE 1 = ISO Sa 3 = White metal blast (100% removal).<\/li>\n    <li>SSPC SP 10 = NACE 2 = ISO Sa 2.5 = Near-white blast (\u226595% removal). The dominant industrial standard.<\/li>\n    <li>SSPC SP 6 = NACE 3 = ISO Sa 2 = Commercial blast (\u226566% removal).<\/li>\n    <li>SSPC SP 7 = NACE 4 = ISO Sa 1 = Brush-off blast (loose contaminants removed).<\/li>\n  <\/ul>\n<\/aside>\n\n<nav class=\"hlh-art-toc\" aria-label=\"Table des mati\u00e8res\">\n  <h2>Table of Contents<\/h2>\n  <ol>\n    <li><a href=\"#intro\">Why Two Systems Exist<\/a><\/li>\n    <li><a href=\"#full-table\">Complete Cross-Reference Table<\/a><\/li>\n    <li><a href=\"#sp5\">SP 5 \/ NACE 1 \/ Sa 3 \u2014 White Metal Blast<\/a><\/li>\n    <li><a href=\"#sp10\">SP 10 \/ NACE 2 \/ Sa 2\u00bd \u2014 Near-White Blast<\/a><\/li>\n    <li><a href=\"#sp6\">SP 6 \/ NACE 3 \/ Sa 2 \u2014 Commercial Blast<\/a><\/li>\n    <li><a href=\"#sp7\">SP 7 \/ NACE 4 \/ Sa 1 \u2014 Brush-off Blast<\/a><\/li>\n    <li><a href=\"#specifying\">How to Cite These Standards in Specifications<\/a><\/li>\n  <\/ol>\n<\/nav>\n\n<section id=\"intro\" class=\"hlh-art-section\">\n  <h2>Why Two Systems Exist<\/h2>\n  <p>Surface preparation cleanliness is specified by two parallel standards systems: <strong>SSPC<\/strong> (originally US, now widely used internationally) and <strong>ISO 8501-1<\/strong> (the international standard derived from the Swedish SA grades published in 1967). The NACE numbered system, recently merged into AMPP, is a third reference but maps cleanly to SSPC.<\/p>\n\n<p>The two systems describe the same visual cleanliness using different reference photographs and terminology. They are functionally equivalent for most practical purposes. The role of cleanliness standards within the broader sand blasted surface specification is covered in our <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface\/\" target=\"_blank\" rel=\"noopener\">pillar guide on sand blasted surface<\/a>.<\/p>\n<\/section>\n\n<section id=\"full-table\" class=\"hlh-art-section\">\n  <h2>Complete Cross-Reference Table<\/h2>\n  <div class=\"hlh-art-table-wrap\">\n<table>\n  <thead><tr><th>SSPC<\/th><th>NACE<\/th><th>ISO 8501-1<\/th><th>Removal %<\/th><th>Description<\/th><\/tr><\/thead>\n  <tbody>\n    <tr><td><strong>SP 1<\/strong><\/td><td>&mdash;<\/td><td>&mdash;<\/td><td>&mdash;<\/td><td>Solvent cleaning (degreasing only)<\/td><\/tr>\n    <tr><td><strong>SP 2<\/strong><\/td><td>&mdash;<\/td><td>St 2<\/td><td>&mdash;<\/td><td>Hand tool cleaning<\/td><\/tr>\n    <tr><td><strong>SP 3<\/strong><\/td><td>&mdash;<\/td><td>St 3<\/td><td>&mdash;<\/td><td>Power tool cleaning<\/td><\/tr>\n    <tr><td><strong>SP 5<\/strong><\/td><td>NACE 1<\/td><td>Sa 3<\/td><td>100%<\/td><td>White metal blast cleaning<\/td><\/tr>\n    <tr><td><strong>SP 6<\/strong><\/td><td>NACE 3<\/td><td>Sa 2<\/td><td>\u226566%<\/td><td>Commercial blast cleaning<\/td><\/tr>\n    <tr><td><strong>SP 7<\/strong><\/td><td>NACE 4<\/td><td>Sa 1<\/td><td>Loose only<\/td><td>Brush-off blast cleaning<\/td><\/tr>\n    <tr><td><strong>SP 10<\/strong><\/td><td>NACE 2<\/td><td>Sa 2&frac12;<\/td><td>\u226595%<\/td><td>Near-white blast cleaning<\/td><\/tr>\n    <tr><td><strong>SP 11<\/strong><\/td><td>&mdash;<\/td><td>&mdash;<\/td><td>&mdash;<\/td><td>Power tool to bare metal<\/td><\/tr>\n    <tr><td><strong>SP 14<\/strong><\/td><td>NACE 8<\/td><td>&mdash;<\/td><td>Variable<\/td><td>Industrial blast cleaning (between SP 6 and SP 7)<\/td><\/tr>\n  <\/tbody>\n<\/table>\n<\/div>\n<\/section>\n\n<section id=\"sp5\" class=\"hlh-art-section\">\n  <h2>SP 5 \/ NACE 1 \/ Sa 3 \u2014 White Metal Blast<\/h2>\n  <p>The most aggressive cleanliness grade. SP 5 \/ Sa 3 requires <strong>100% of each unit area free of all visible mill scale, rust, paint, oxidation, foreign material, and any other contaminants<\/strong>. The surface presents as uniformly bright metal.<\/p>\n\n<p><strong>Typical applications:<\/strong><\/p>\n<ul>\n  <li>Immersion service tank linings (potable water, chemicals, oil storage)<\/li>\n  <li>Aerospace primary structural coating<\/li>\n  <li>Pharmaceutical and food contact equipment<\/li>\n  <li>High-temperature coatings (&gt;200\u00b0C service)<\/li>\n<\/ul>\n\n<p>SP 5 is the most expensive cleanliness grade and is rarely specified unless absolutely required.<\/p>\n<\/section>\n\n<section id=\"sp10\" class=\"hlh-art-section\">\n  <h2>SP 10 \/ NACE 2 \/ Sa 2\u00bd \u2014 Near-White Blast<\/h2>\n  <p>The de facto industrial standard for high-performance coatings. SP 10 \/ Sa 2.5 requires <strong>at least 95% of each unit area free of all visible contaminants<\/strong>. The remaining 5% may show only very light shadowing or staining.<\/p>\n\n<p><strong>Typical applications:<\/strong><\/p>\n<ul>\n  <li>Marine and offshore structures (decks, hulls, platforms)<\/li>\n  <li>Pipeline coatings (fusion-bonded epoxy)<\/li>\n  <li>Industrial fabrication for corrosive service<\/li>\n  <li>Architectural steel for long-life coating systems<\/li>\n<\/ul>\n\n<p>SP 10 \/ Sa 2.5 represents the cost-quality optimum for the majority of industrial protective coating work. For marine application, see our guide on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-steel-for-marine-offshore-sa-2-5-zinc-primer-workflow\/\" target=\"_blank\" rel=\"noopener\">sand blasted steel for marine and offshore: SA 2.5 + zinc primer workflow<\/a>.<\/p>\n<\/section>\n\n<section id=\"sp6\" class=\"hlh-art-section\">\n  <h2>SP 6 \/ NACE 3 \/ Sa 2 \u2014 Commercial Blast<\/h2>\n  <p>SP 6 \/ Sa 2 requires <strong>at least 66% of each unit area free of all visible contaminants<\/strong>. Tightly adherent mill scale and rust may remain on up to 33%.<\/p>\n\n<p><strong>Typical applications:<\/strong><\/p>\n<ul>\n  <li>General structural steel for atmospheric service<\/li>\n  <li>Equipment skids and frames<\/li>\n  <li>Maintenance painting<\/li>\n  <li>Cost-sensitive applications with moderate corrosion exposure<\/li>\n<\/ul>\n\n<p>SP 6 is approximately 30% cheaper than SP 10 due to reduced media consumption. The trade-off is reduced coating life \u2014 typically 50\u201370% of SP 10 performance.<\/p>\n<\/section>\n\n<section id=\"sp7\" class=\"hlh-art-section\">\n  <h2>SP 7 \/ NACE 4 \/ Sa 1 \u2014 Brush-off Blast<\/h2>\n  <p>The lightest cleanliness grade. SP 7 \/ Sa 1 requires only that <strong>all loose mill scale, loose rust, and loose coatings be removed<\/strong>. Tightly adherent material may remain.<\/p>\n\n<p><strong>Typical applications:<\/strong><\/p>\n<ul>\n  <li>Maintenance painting over existing coating systems<\/li>\n  <li>Surface preparation for thick high-build coatings<\/li>\n  <li>Touch-up work where economic constraints prevent full re-blast<\/li>\n<\/ul>\n<\/section>\n\n<section id=\"specifying\" class=\"hlh-art-section\">\n  <h2>How to Cite These Standards in Specifications<\/h2>\n  <p>For maximum clarity in international specifications, cite both SSPC and ISO designations together. Common acceptable formats:<\/p>\n\n<ul>\n  <li><strong>&#8220;Surface cleanliness to SSPC SP 10 (ISO 8501-1 Sa 2\u00bd)&#8221;<\/strong><\/li>\n  <li><strong>&#8220;Blast cleaning to NACE 2 \/ SSPC SP 10 \/ Sa 2\u00bd&#8221;<\/strong><\/li>\n  <li><strong>&#8220;Near-white blast per ISO 8501-1 Sa 2\u00bd, equivalent to SSPC SP 10&#8221;<\/strong><\/li>\n<\/ul>\n\n<p>Always pair the cleanliness specification with a separate profile specification since cleanliness standards do not specify roughness. A complete specification template is provided in our guide on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-write-a-sand-blasted-surface-spec-for-suppliers-free-template\/\" target=\"_blank\" rel=\"noopener\">how to write a sand blasted surface spec for suppliers<\/a>.<\/p>\n<\/section>\n\n<aside class=\"hlh-art-pillarback\">\n  <strong>Looking for the complete picture?<\/strong> This article is part of our broader resource on sand blasted surface specification, standards, and applications. Read the full <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface\/\" target=\"_blank\" rel=\"noopener\">pillar guide to sand blasted surface<\/a> for the complete process, Ra\/Rz reference, four-standard cross-reference, and material-by-material guidance.\n<\/aside>\n\n<section class=\"hlh-art-related\">\n  <h3>Related Articles<\/h3>\n  <div class=\"hlh-art-related-grid\">\n    <div class=\"hlh-art-related-card\">\n      <a href=\"https:\/\/hlh-js.com\/resource\/blog\/nace-1-2-3-4-blast-cleaning-standards-explained-with-visual-references\/\" target=\"_blank\" rel=\"noopener\">NACE 1\/2\/3\/4 Blast Cleaning Standards Explained<\/a>\n    <\/div>\n    <div class=\"hlh-art-related-card\">\n      <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-steel-for-marine-offshore-sa-2-5-zinc-primer-workflow\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Steel for Marine &#038; Offshore: SA 2.5 + Zinc Primer Workflow<\/a>\n    <\/div>\n    <div class=\"hlh-art-related-card\">\n      <a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-write-a-sand-blasted-surface-spec-for-suppliers-free-template\/\" target=\"_blank\" rel=\"noopener\">How to Write a Sand Blasted Surface Spec for Suppliers<\/a>\n    <\/div>\n    <div class=\"hlh-art-related-card\">\n      <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface-inspection-acceptance-visual-profile-cleanliness\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Surface Inspection &#038; Acceptance<\/a>\n    <\/div>\n  <\/div>\n<\/section>\n\n<section id=\"faq\" class=\"hlh-art-section hlh-art-faq\">\n  <h2>Questions fr\u00e9quemment pos\u00e9es<\/h2>\n  <details>\n    <summary>Is SP 10 the same as Sa 2.5?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>Yes, functionally. SSPC SP 10 and ISO 8501-1 Sa 2\u00bd are equivalent designations for near-white metal blast cleaning, requiring at least 95% of each unit area to be free of all visible contaminants. NACE 2 is the equivalent NACE\/AMPP designation.<\/p><\/div>\n  <\/details>\n  <details>\n    <summary>What is the difference between SP 5 and SP 10?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>SP 5 (white metal) requires 100% removal of all visible contaminants; SP 10 (near-white) allows up to 5% light shadowing. SP 5 is typically 30\u201350% more expensive due to extended blast time and stricter inspection.<\/p><\/div>\n  <\/details>\n  <details>\n    <summary>Which is most commonly specified?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>SSPC SP 10 \/ ISO Sa 2.5 is the dominant industrial standard for high-performance protective coatings \u2014 the cost-quality optimum for marine, offshore, pipeline, and industrial fabrication work.<\/p><\/div>\n  <\/details>\n  <details>\n    <summary>Do cleanliness standards specify the surface roughness?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>No. SSPC, NACE, and ISO 8501-1 specify only visual cleanliness. Surface roughness is specified separately, typically per ISO 8503 or by direct numerical value.<\/p><\/div>\n  <\/details>\n  <details>\n    <summary>Can I substitute SP 6 for SP 10 to save money?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>Only if the coating system permits. SP 6 allows up to 33% tightly adherent mill scale and rust, which typically reduces coating life to 50\u201370% of SP 10 performance. Check the coating manufacturer&#8217;s specification.<\/p><\/div>\n  <\/details>\n<\/section>\n\n<section class=\"hlh-art-cta\">\n  <h2>Request an Abrasive Blasting Media Sample<\/h2>\n  <p>Jiangsu Henglihong Technology Co., Ltd. supplies certified aluminum oxide, garnet, glass bead, steel grit, and steel shot to global industrial buyers. Request a sample with full batch documentation for technical evaluation.<\/p>\n  <a class=\"hlh-art-cta-button\" href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Request a Sample &rarr;<\/a>\n<\/section>\n\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@graph\": [\n        {\n            \"@type\": \"Article\",\n            \"headline\": \"SSPC SP5 \\\/ SP6 \\\/ SP10 vs ISO Sa 1 \\\/ Sa 2 \\\/ Sa 2.5 \\\/ Sa 3: Complete Cross-Reference\",\n            \"description\": \"A definitive cross-reference between the American SSPC surface preparation standards, the international ISO 8501-1 Sa grades, and the matching NACE designations \\u2014 with the visual criteria, acceptance language, and typical use cases for each cleanliness grade.\",\n            \"datePublished\": \"2026-05-01\",\n            \"dateModified\": \"2026-05-01\",\n            \"author\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\\\/\"\n            },\n            \"publisher\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\\\/\"\n            },\n            \"mainEntityOfPage\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/sspc-sp5-sp6-sp10-vs-iso-sa-1-sa-2-sa-2-5-sa-3-complete-cross-reference\\\/\"\n        },\n        {\n            \"@type\": \"FAQPage\",\n            \"mainEntity\": [\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Is SP 10 the same as Sa 2.5?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Yes, functionally. 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