SSPC-SP 5/naCe no. 1. White Metal Blast Cleaning. This The Society for Protective Coatings (SSPC)/NACE. International (NACE) standard. View blocwindcotssidi.tk from ELECTRONIC at Servicio Nacional de Aprendizaje SENA. SSPC-SP 5/NACE NO. 1 September 1, Joint Surface Preparation. 1/SSPC-SP 5 White Metal Blast Cleaning This NACE International (NACE)/SSPC : The Save this PDF as: Download "Joint Surface Preparation Standard.
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Home; NACE No. 1/SSPC-SP 5. $; Add to Cart. Printed Edition + PDF; Immediate download; $; Add to Cart. the Society for Protective Coatings (SSPC) definitions (see references for a NACE. Abrasive Blast Cleaning. White Metal. Sa3. SSPC-SP 5. (component to DH equipment) or by manual measurements. • SSPC/NACE SSPC-SP5/NACE 1, White Metal Blast Cleaning. ➢ SSPC-SP
Additional information on visual stan- 2.
Appen- dix A. Procedures Following Blast Cleaning and 5. NOTE: The presence abrasive system with compressed air, blast nozzle, and of toxic metals in the abrasives or paint being removed abrasive, with or without vacuum for dust and abrasive may place restrictions on the methods of cleaning recovery.
Comply with all applicable regulations. Moisture separators, oil separators, traps, or other equipment may 5. Any parties responsible for establishing the requirements and damage to the surface profile resulting from the removal of those responsible for performing the work.
NOTE: Informa- surface imperfections shall be corrected to meet the tion on the use of inhibitors to prevent the formation of rust requirements of Section 2.
NOTE: Additional infor- immediately after wet blast cleaning is contained in mation on surface imperfections is contained in Section A. Blast Cleaning Abrasives blast cleaning shall be removed by recleaning the rusted areas to meet the requirements of this standard before 6.
NOTE: Information on rust-back re-rust- ing and the type, grade, and surface condition of the steel to be surface condensation is contained in Sections A. Inspection 6. Materials and 6. In the case of a dispute, an arbitration or settle- specification covering the work, because abrasive embed- ment procedure established in the procurement documents ment and abrasives containing contaminants may not be project specification shall be followed.
If no arbitration or acceptable for some service requirements. NOTE: Addi- settlement procedure is established, then a procedure mu- tional information on abrasive selection is given in Section tually agreeable to downloadr and supplier shall be used. While normally such embedment or residues tion.
Safety and Environmental Requirements soluble, solvent-soluble, acid-soluble, or other soluble contaminants particularly if the prepared steel is to be 9.
Urface Reparation Tandards
Comments A. Large particle sized abrasives particularly metal- blast cleaning are listed below. Accordingly, Subject Commentary Section it is recommended that the use of larger abrasives be avoided in these cases. However, larger abrasives may be Abrasive Selection If control of profile Wet Abrasive Blast Cleaning Typical profile heights Surface Profile It should be used when a high degree of blast for Abrasive Blast Cleaned Steel provides color cleaning is required.
The primary functions of blast photographs for the various grades of surface preparation cleaning before coating are: a to remove material from as a function of the initial condition of the steel.
The series the surface that can cause early failure of the coating A-SP 10, B-SP 10, C-SP 10 and D-SP 10 photographs system and b to obtain a suitable surface roughness and depict surfaces cleaned to a near-white blast grade. Other to enhance the adhesion of the new coating system. Coatings tend to pull away from sharp edges and A.
It is important to projections, leaving little or no coating to protect the under- tion should be removed prior to coating see Section A. Other features that are difficult to properly cover and protect include crevices, weld porosities,A.
The high cost of the methods to remedy colder than the dew point of the surrounding air. It is, surface imperfections requires weighing the benefits of therefore, recommended that the temperature of the steel edge round- ing, weld spatter removal, etc.
Section 6: Blast Cleaning Abrasives 6. NOTE: The presence of toxic metals in the abrasives or paint being removed may place restrictions on the methods of cleaning permitted. The chosen method shall comply with all applicable regulations. Moisture separators, oil separators, traps, or other equipment may be necessary to achieve clean, dry air.
Any damage to the surface profile resulting from the removal of surface imperfections shall be corrected to meet the requirements of Paragraph 2. Section 8: Inspection 8. Materials and work areas shall be accessible to the inspector. The procedures and times of inspection shall be as agreed upon by those responsible for establishing the requirements and those responsible for performing the work.
In the case of a dispute, an arbitration or settlement procedure established in the procurement documents project specification shall be followed. If no arbitration or settlement procedure is established, a procedure mutually agreeable to downloadr and supplier shall be used. Section 9: Safety and Environmental Requirements 9.
Section Comments It should be used when the highest degree of blast cleaning metal blast cleaning, commercial blast cleaning, industrial blast cleaning, and brush-off blast cleaning.
It is important to recognize that blasting abrasives may the new coating system. NACE International 3 7 the steel during preparation. While such embedment or residues are normally not detrimental, care should be taken to ensure that the abrasive is free from detrimental amounts of water-soluble, solvent-soluble, acid-soluble, or other soluble contaminants particularly if the prepared steel is to be used in an immersion environment.
Large particle-sized abrasives particularly metallic can produce a profile that may be too deep to be adequately covered by a single thin-film coat.
Accordingly, it is recommended that the use of larger abrasives be avoided in these cases. However, larger abrasives may be needed for thick-film coatings or to facilitate removal of thick coatings, heavy mill scale, or rust.
However, it is strongly recommended that the procurement document require the use of visual standards or comparators. SSPC-Vis provides color photographs for the various grades of surface preparation as a function of the initial condition of the steel. Coatings tend to pull away from sharp edges and projections, leaving little or no coating to protect the underlying steel. Other features that are difficult to properly cover and protect include crevices, weld porosities, laminations, etc.
The high cost of the methods to remedy surface imperfections requires weighing the benefits of edge rounding, weld spatter removal, etc. Poorly adhering contaminants, such as weld slag residues, loose weld spatter, and some minor surface laminations may be removed during the blast cleaning operation.
Other surface defects steel laminations, weld porosities, or deep corrosion pits may not be evident until the surface preparation has been completed. Proper planning for such surface repair work is essential because the timing of the repairs may occur before, during, or after the blast cleaning operation. These soluble salts can be present on the steel surface prior to blast cleaning as a result of atmospheric contamination.
In addition, contaminants can be deposited on the steel surface during blast cleaning if the abrasive is contaminated.
Therefore, rust-back can be minimized by removing these salts from the steel surface and eliminating sources of recontamination during and after blast cleaning. The time interval between blast cleaning and rust-back varies greatly from one environment to another.
Under mild ambient conditions, if chemical contamination is not present see Paragraph A6 , it is best to blast clean and coat a surface on the same day.With wet abrasive blast cleaning or waterjetting, a certain level of ash rusting may be acceptable. The series the surface that can cause early failure of the coating A-SP 10, B-SP 10, C-SP 10 and D-SP 10 photographs system and b to obtain a suitable surface roughness and depict surfaces cleaned to a near-white blast grade.
Joint Surface Preparation Standard: White Metal Blast Cleaning
In such cases, the contract documents may need to modify the surface preparation standards to obtain the result desired.
downloadrs may receive current information on all standards and other publications by contacting the organi- zations at the addresses below: 1 1. The sponge contains the abrasive and facilitates cleanup and recycling. Slight residues of rust and paint may be left in the lower portion of pits if the original surface is pitted.
The user is cautioned to obtain the latest edition. Tightly adherent mill scale, rust, and coating may remain on the surface. Since the soaps formed are soluble in water, the contaminants are more easily removed by washing with water after saponication. A nal washing with clean water is therefore always necessary.