Background of SSPC PA 2; Overview and Purpose of SSPC-PA 2 (); Purpose of ASTM D ; Definitions; Gage Descriptions; Calibration & Verification. ASTM D focuses on gage use. • SSPC-PA 2 () focuses on acceptability of acquired measurements. • Both address ferrous and non-ferrous metal. This standard is issued under the fixed designation D ; the number immediately following the 1 This practice is under the jurisdiction of ASTM Committee D01 on Paint and . manufacturer’s specifications, n—a statement or set.
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I would like to purchase a book regarding painting standards on thickness of painting. Place the gage probe on a certified coated standard and adjust the gage as necessary. So if your reading is within the spec your fine. April 6, at Verifying accuracy of Type 2 xstm using a certified shim Adjusting Type 2 Gages The final step in the process is to adjust the gage on the surface to which the coating will be applied.
A total of 15 areas must be measured three in the first 1, square feet and one additional area in each of the 12 remaining 1,square-foot areas or portions thereof. While their use has declined, they are still readily available and ast by some.
Measuring Dry Film Coating Thickness According to SSPC-PA 2
It includes definitions of key terms, reference documents, the significance and use of the practice, the advantages and limitations of coating thickness gages, and a description of test specimens. One conduit is through training and education. Appendix 7 was added to accommodate pipe coaters that need to determine coating thickness conformance on non-flat or non-plate areas, including smaller pipe sections on axtm cart or rack and longer pipe spools.
sstm Thank you so much for the information on this page. Provisions for measuring on soft or tacky coatings are described in 5. While the gage may be out of tolerance by 0. If a large number of measurements are being obtained, the user may opt to verify gage accuracy during measurement acquisition for example, hourly.
These steps are 1 gage calibration, 2 verification of gage accuracy and 3 gage adjustment. A test certificate or other documentation showing traceability to a national metrology institution is required.
Spot measurements are obtained in each direction up to the maximum surface area coated during the work shift until two consecutive conforming spot measurements are acquired in that direction, or until no additional measurements can be made.
January 28, at 5: Communicating the new requirements of this standard to the industry is challenging but essential. It describes the methods and recommended frequency for verifying the accuracy of gages and for adjusting optimizing the equipment and lists the reporting recommendations.
The standard has been updated on multiple occasions. The values given in parentheses are for information only.
However, several Type 2 electronic gage manufacturers offer a variety of probe configurations, some of which are less affected by proximity to edges and are designed to better measure the thickness of coatings on edges Fig. This requirement makes Type 1 gages very difficult to use.
Webprint Printed and bound. October 17, at 8: Please email me back with price and where to purchase standards on paint thickness. I feel empowered and have gained valuable knowledge.
SSPC-PA2 prescribes a frequency of coating thickness measurement based on the size of the area coated. The gage reading is adjusted to match the thickness of the shim, which effectively removes any influence from the underlying surface. One of a variety of Type 2 gage probe configurations designed to better measure DFT of coatings on edges Before measuring coating thickness on edges, the user should verify the gage and probe for accuracy by placing a thin, flexible shim certified or measured onto the prepared, uncoated edge.
Measuring Dry Film Coating Thickness According to SSPC-PA 2KTA University
The steps are incorporated by d70091 in SSPCPA 2 and are completed before obtaining coating thickness measurements to determine conformance to a specified coating thickness range. Your email address will not be published. For decades, the industry was cautioned about taking coating thickness measurements within one inch of an edge, let alone on an edge.
Measured shims individually labeled with a stated thickness value commonly supplied with Type 2 gages can also be used for gage adjustment. This measured distance is displayed as coating thickness by the gages. Acquisition of more than three gage readings within a spot is permitted.