What are the two dominant blast cleaning standards?
The two dominant abrasive blast cleaning standards, ISO 8501 and the SSPC/NACE joint standards, are tough to compare. Although they recognize roughly the same levels of cleanliness, they classify them in opposite ways, muddying the water.
What are SSPC standards?
SSPC-SP5 provides conditions for the end condition of a white metal blast, and the materials and procedure necessary for providing the end condition. The standard lists dry abrasive blasting as the preferred method with wet blasting an option to be agreed upon between the two parties.
What does SA 2.5 mean?
Sa 2.5 is a cleanliness standard, not a surface roughness standard. An example of a surface roughness standard would be ISO 8503. One reason cleanliness is required is because paint will not adhere properly to a dirty surface.
What SSPC 11?
SSPC SP 11. November 1, 1987. Power Tool Cleaning to Bare Metal. This standard covers the requirements for power tool cleaning to produce a bare metal surface and to retain or produce a minimum 25 micrometer (1.0 mil) surface profile. This standard is suitable…
What SSPC 3?
SSPC-SP3- Power Tool Cleaning As in hand tool cleaning, SP3 is a method of steel surface preparation intended to remove all loose mill scale, rust, paint and other contaminants that may be detrimental to a coating application. As it’s name suggests, SP3 di ers in that it used power tools to clean the surface.
What is SSPC sp7?
Brush-Off Grade Blasting (SSPC-SP 7) cleans to the same requirements and may be used as an alternative to scraping and wire brushing. Prior to scraping and wire brushing, remove grease, oil, salt, chemical dust, and other contaminants by Chemical Cleaning.
What is NACE MR0175 requirement?
NACE Requirements The NACE MR0175/ISO 15156 standard lists prequalified materials for use in upstream oilfield equipment where sulfide-induced stress corrosion cracking may be a risk in sour environments, i.e., in oil/gas/seawater mixtures where hydrogen sulfide (H2S) is present.
What is the difference between SA 2.5 and SA 3?
The relationship between the standards Sa3 and 2.5 is practically identical except that a 2.5 allows for staining or traces of contamination i.e. Very thorough blast cleaning.
What are the abrasive blast cleaning standards?
Understanding The Abrasive Blast Cleaning Standards Sspc/Nace And Iso 8501 The two dominant abrasive blast cleaning standards, ISO 8501 and the SSPC/NACE joint standards, are tough to compare. Although they recognize roughly the same levels of cleanliness, they classify them in opposite ways, muddying the water. ISO 8501
How are the different degrees of blast cleaning made?
The mixture is created in one of three ways: water is injected into the dry abrasive blast stream, abrasive is injected into a pressurized water stream, or an abrasive/water slurry is propelled through the blast hose. The five degrees of cleaning are titled and numbered the same as dry abrasive blast cleaning, but with a “WAB” suffix:
What are the dry blast standards?
The dry blast standards discuss freedom from rust back (re-rusting), which is rusting that forms when dry blast cleaned steel is exposed to moisture, contamination, or a corrosive atmosphere. The dry blast standards require the removal of visible rust that forms on the surface after cleaning (i.e., removal of the rust back).
What is industrial blast cleaning?
Industrial Blast Cleaning specifies that 90% of the tightly-adhered matter must go. Shadows, streaks and stains from rust, mill scale and old coatings are allowed on 100% of the surface. Industrial is specified for conditions when the existing coating is thin, well-adherent and compatible with new coating.
