SSPC AB 2-2015 Cleanliness of Recycled Ferrous Metallic Abrasives.pdf
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1、SSPC-AB 2March 2, 2015Editorial Revision February 15, 201611. Scope 1.1 This standard contains requirements for the cleanliness of recycled ferrous metallic blast cleaning abrasives (the “work mix”) used for the removal of coatings, paints, scale, rust and other foreign matter from steel or other su
2、rfaces. Laboratory and field testing procedures to determine conformance to the requirements of the standard are also included.2. Description2.1 FERROUS METALLIC ABRASIVES: Ferrous metallic abrasives are used for blast cleaning steel and other surfaces in field and shop locations. The inherent value
3、 of ferrous metallic abrasives is their ability to be recycled many times. The recycled abrasive must be cleaned to remove abrasive fines and debris, including paint, rust, mill scale, and other contaminants generated during the blast cleaning of steel or other surfaces.2.2 RECYCLED ABRASIVE WORK MI
4、X: The work mix develops during blast cleaning and recycling and is composed of new media and, recycled clean media that meets the requirements of Sections 4.1 through 4.6 of this standard. The new abrasive being added may consist of shot, grit, or a mix of shot and grit. 3. Referenced Standards3.1
5、The latest issue, revision, or amendment of the referenced standards in effect on the date of invitation to bid shall govern, unless otherwise specified. 3.1.1 If there is a conflict between the requirements of any of the cited referenced standards and this standard, the require ments of this standa
6、rd shall prevail.3.2 SSPC: THE SOCIETY FOR PROTECTIVE COATINGS STANDARDPA 17 Procedure for Determining Conformance to Steel Profile/Surface Roughness/ Peak Count Requirements3.3 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) STANDARDS:1D3335 Test Method for Low Concentrations of Lead, Cadmium and
7、 Cobalt in Paint by Atomic Absorption Spectroscopy D4940 Test Method for Conductimetric Analysis of Water Soluble Ionic Contaminants of Blasting Abrasives D7393 Standard Practice for Indicating Oil in Abrasives4. Requirements for Recycled Work Mix Abrasives 4.1 Unless otherwise specified, the recycl
8、ed work mix shall meet the requirements of Sections 4.2 through 4.6 prior to first use at each jobsite. The work mix shall meet the requirements of Sections 4.4, 4.5, and 4.6 when tested thereafter at 12-hour intervals or once per work shift, whichever is shorter. Nonconforming work mix shall not be
9、 used, shall be removed from equipment and shall be disposed of in accordance with federal, state, and local regulations and project specification requirements (see Notes 6.1, 6.2 and 6.3). 4.2 The abrasive material as supplied shall comply with all applicable Federal, state/provincial and local reg
10、ulations. Material Safety Data Sheets shall be furnished for all abrasive materials supplied (see Note 6.4).4.3 LEAD CONTENT: The maximum lead content of the work mix shall be 0.1% by weight (1000 parts per million ppm). Collect a single random sample of approximately 115 grams g (1/4 pound lb) of t
11、he work mix for testing according to requirements of ASTM D3335. 4.4 WATER-SOLUBLE CONTAMINANTS: A single random sample of approximately 300 milliliters (10 fluid ounces) of cleaned work mix shall be tested for conductivity in accordance with ASTM D4940. The conductivity of the abrasive work mix sha
12、ll not exceed 1000 micromhos/cm (1 mho = 1 siemen). The test shall be performed once every 12 hours or once every work shift, whichever period is shorter (see Notes 6.2 and 6.3). 1 ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. For referenced ASTM standards, visit the A
13、STM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standards volume infor-mation, refer to the standards Document Summary page on the ASTM website.SSPC: The Society for Protective CoatingsABRASIVE STANDARD NO. 2Cleanliness of Recycled Ferrous Meta
14、llic AbrasivesSSPC-AB 2March 2, 2015Editorial Revision February 15, 2016 24.5 OIL CONTENT: A single random sample of the abrasive work mix shall be tested in accordance with ASTM D7393. There shall be no evidence of oil in the water used for the test, either on the surface or as an emulsion. The tes
15、t results shall be reported; however since the test is being performed on a recycled work mix, reporting the abrasive manufacturer and batch/lot number, and size designation as required by ASTM D7393 is not a requirement of SSPC-AB 2.4.6 PARTICLE SIZE DISTRIBUTION: The particle size distribution of
16、the clean work mix shall be capable of achieving and maintaining the profile within the specified range as determined by the procedure in SSPC-PA 17. (See Note 6.5 and subsections and Appendix A for examples of specification language for optional tests that may be used to assess the particle size di
17、stribution and determine the amount of nonabrasive residue.) New shot, grit, or a mix of shot and grit shall be added periodically to the work mix to maintain the specified profile range.5. Disclaimer5.1 This is a consensus standard developed by SSPC: The Society for Protective Coatings. While every
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