What Is Sp5 Surface Prep

SP 5 / Nace #1 / Sa 3 White Metal is the highest grade of abrasive blast cleaning. No shadows, streaks or stains are permitted. When viewed without magnification, the surface shall be free of all visible oil, grease, dust, dirt, mill scale, rust, coating, oxides, corrosion products and other foreign matter.

What are SSPC standards?

The standard requires the surface to be free from all visible oil, grease, dirt, dust, rust, coating, oxides, mill scale, corrosion products, and other foreign matter when viewed without magnification. However, some rust remaining at the bottom of pits is acceptable if the surface was pitted to begin with.

What is the meaning of SA2 5?

A. SA2.5, also known as near-white blast cleaning is a method of preparing steel surfaces which, when viewed without magnification, shall be free of all visible oil, grease, dirt, dust, mill scale, rust and paint / coatings.