Read on Graco why two dominant surface preparation standards through abrasive blasting, ISO 8501 and the SSPC/NACE joint standards, are tough to compare.

Sa 2: thoroughly spray (Sandblasting) or projectile (shot blasting) to remove rust. There should be no visible grease, dirt, oxide scale, rust and other attachments on the steel surface, and the residues should be firmly attached.

Sa 2: Thorough blast cleaning. The jet is passed over the surface long enough to remove all mill scale and rust and practically all foreign matter. Finally, the surface is cleaned with a vacuum cleaner, clean and dry compressed air or a clean brush. It should be grayish in colour. Sa 2,5: Very thorough blast-cleaning.

Sa 2.5 is a standard for surface preparation in the context of blast cleaning, specifically referring to a near-white metal blast cleaning grade. According to ISO 8501-1, Sa 2.5 requires the removal of all visible oil, grease, dirt, rust, mill scale, and other contaminants, leaving the surface with a bright, uniform appearance free of any ...

Jun 10, 2024 · SA 2.5 is a standard for abrasive cleaning, which falls under the ISO 8501 standard set by the International Standards Organisation. It is also known as "Very Thorough Blast Cleaning".

Jun 5, 2021 · The general meaning of Sa 2.5 is explained above. My understanding is that the full details are covered by specification SS 55900, available from the Swedish Standards Institute at www.sis.se -- but that this standard was actually canceled in 2001 and is …

Feb 14, 2015 · Usually most materials need a Sa 2 1/2 to fulfill the intended protection (=> ISO 12944-5, tables annex A). Some (e.g. zinc rich alkali silicate) need Sa3, some surface tolerant primers only need a tool cleaned surface, example:

ISO 8501-1 (1988) Blast Cleaning, Sa Surface preparation by blast –cleaning designated by the letters “Sa” to blast-cleaning, any heavy layers shall removed chipping.

The surface preparation by hand and power tools is covered by BS EN ISO 8504-3 [2], and the standard grades of cleanliness in accordance with BS EN ISO 8501-1 [1] are: St. 2: Thorough hand and power tool cleaning St. 3: Very thorough hand and power tool cleaning

Sep 24, 2022 · ISO 8501 ranks cleanliness levels in order of increasing work required. Sa 1 Light Blast Cleaning. Sa 2 Thorough Blast Cleaning. Sa 3 Blast Cleaning to Visually Clean Steel. In North...