{"id":2639,"date":"2025-09-18T09:31:37","date_gmt":"2025-09-18T08:31:37","guid":{"rendered":"https:\/\/www.pinovo.eu\/?post_type=begrippenlijst&p=2639"},"modified":"2026-03-17T10:58:06","modified_gmt":"2026-03-17T09:58:06","slug":"65-10-proprete-des-surfaces","status":"publish","type":"begrippenlijst","link":"https:\/\/www.pinovo.eu\/fr\/glossaire\/65-10-proprete-des-surfaces\/","title":{"rendered":"6,5\/10 Propret\u00e9 des surfaces"},"content":{"rendered":"\n

Sa 2\u00bd is a widely used surface cleanliness standard defined in ISO 8501-1<\/strong>. It describes a very thorough blast cleaning<\/strong> where nearly all rust, mill scale, paint and other contaminants are removed, leaving only slight staining on the steel surface.<\/p>\n\n\n\n

Where is Sa 2\u00bd applied?<\/h2>\n\n\n\n

Sa 2\u00bd is the most common specification for:<\/p>\n\n\n\n

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  • Oil & Gas industry<\/strong> \u2013 pipelines, storage tanks, offshore structures.<\/li>\n\n\n\n
  • Chemical & Petrochemical plants<\/strong> \u2013 vessels, reactors and piping.<\/li>\n\n\n\n
  • Marine & Offshore wind<\/strong> \u2013 ship hulls, substations and steel decks.<\/li>\n\n\n\n
  • Infrastructure<\/strong> \u2013 bridges, cranes and heavy steel constructions.<\/li>\n<\/ul>\n\n\n\n

    For you as an asset owner or contractor, Sa 2\u00bd ensures that protective coatings adhere properly<\/strong> and provide long-term corrosion protection.<\/p>\n\n\n\n

    Extra explanation and standards<\/h2>\n\n\n\n

    The ISO 8501-1 standard defines four main blast cleaning grades:<\/p>\n\n\n\n

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    • Sa 1<\/strong> \u2013 light blast cleaning.<\/li>\n\n\n\n
    • Sa 2<\/strong> \u2013 thorough blast cleaning.<\/li>\n\n\n\n
    • Sa 2\u00bd<\/strong> \u2013 very thorough blast cleaning.<\/li>\n\n\n\n
    • Sa 3<\/strong> \u2013 blast cleaning to visually clean steel.<\/li>\n<\/ul>\n\n\n\n

      Sa 2\u00bd requires that:<\/p>\n\n\n\n

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      • At least 95% of the surface<\/strong> is free from visible oil, rust, mill scale, paint and foreign matter.<\/li>\n\n\n\n
      • Only light shadows or slight discolorations remain.<\/li>\n\n\n\n
      • The prepared surface has a uniform metallic appearance.<\/li>\n<\/ul>\n\n\n\n

        Meeting Sa 2\u00bd is critical for coating performance and is often specified in project standards such as NORSOK<\/strong>, ISO<\/strong> and SSPC<\/strong>.<\/p>\n\n\n\n

        Pinovo and Sa 2\u00bd<\/h2>\n\n\n\n

        With Pinovo\u2019s dust-free vacuum blasting system<\/strong>, you can achieve Sa 2\u00bd while ensuring:<\/p>\n\n\n\n

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        • No dust clouds<\/strong> \u2013 safer for operators and surrounding teams.<\/li>\n\n\n\n
        • ATEX compliance<\/strong> \u2013 safe for explosive atmospheres.<\/li>\n\n\n\n
        • Consistent surface quality<\/strong> \u2013 stable surface profile for optimal coating adhesion.<\/li>\n\n\n\n
        • Environmental protection<\/strong> \u2013 no microplastic or grit release.<\/li>\n<\/ul>\n\n\n\n

          Do you want to achieve Sa 2\u00bd cleanliness safely and without environmental risk?
          Request a demo or training to see Pinovo\u2019s vacuum blasting in action.<\/strong><\/p>\n\n\n