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Question posted - November 4 to November 8, 2013:

I keep reading references to sweep blasting, but I can't find a standard for it. What is sweep blasting, and is there a standard for it in the U.S. or elsewhere?


Selected Answers

From Randy Gordon of West Coast Industrial Coatings on December 6, 2013:
SSPC-SP 7, “Brush Off” blast cleaning requires the removal of all loose material. "Sweep Blasting" is more in line with SP 16, as Trevor has stated. I have seen the language in many contracts  describe a lower air pressure blast using fine mesh abrasive, "sweeping" of all surfaces to scarify in preparation for overcoat. New shop-coated steel, for instance, would be "sweep blasted" prior to the application of successive coats in the field. There is no "sweep blast" standard, but it's not really SP 7, it's more like SP16.

From trevor neale of TF Warren Group on November 8, 2013:
Hi, guys. The term sweep blasting is a slang expression for Brush-off Blast Cleaning. SSPC issued a new specification, SSPC-SP 16, Brush-off Blast Cleaning of Non-ferrous Metals, which addresses many of the anomalies of SP 7 for non-ferrous surfaces such as old coatings.

From trevor neale of TF Warren Group on November 7, 2013:
Please refer to SSPC-SP16, which offers a more detailed approach to the brush blasting of non-ferrous surfaces, such as existing coatings, and non-ferrous metals.

From Mark Edmonds of none on November 6, 2013:
There is no such standard for "sweep blasting." That is a slang term. The correct verbiage is Brush Off Blasting, as noted by others, to be SSPC-SP 7/NACE No.4 or ISO 8501-1 SA 1.

From wenbo chen of International Paint on November 5, 2013:
The standards are SSPC-SP 7/NACE No.4, and ISO 8501-1 SA1.

From Ken Gray of TayMae Associates Inc. on November 4, 2013:
Yes, indeed, SSPC-SP 7 is the standard for sweep blasting of steel surfaces.

From Brian Chapman of Cadillac Fabrication on November 4, 2013:
Here is a website: http://www.international-marine.com/Literature/AbrasiveSweepStandards.pdf

From Brian Chapman of Cadillac Fabrication on November 4, 2013:
I would say you are looking at SSPC-SP 7.


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Tagged categories: Certifications and standards; Surface preparation


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