Sa 2.5 (Near-White Metal) — Definition and Commercial Application

What is Sa 2.5? Near-white metal blast cleaning explained — what it requires, why it is the standard for structural steelwork, NACE/SSPC equivalents, and how it differs from Sa 3.

Planning a Sa 2½ requirement around the next coating stage

Where a specification calls for Sa 2½, the project team should also define the relevant steelwork, current condition, accessible surfaces, coating system, primer sequence, inspection points and protection of prepared steel. The Wigan case study is a documented example of coordinated sequencing; it does not prescribe a method for another site.

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