NACE No. 4/SSPC-SP 7

This joint standard covers the use of blast cleaning abrasives to achieve a defined degree of cleaning of steel surfaces prior to the application of a protective coating or lining system. The focus of this standard is brush-off blast cleaning, which allows as much of an existing adherent coating to remain as possible and to roughen the surface prior to coating application. The requirements presented include the end condition of the surface and materials and procedures necessary to achieve and verify the end condition. This standard is maintained jointly by the SSPC and NACE Task Group 006.