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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Link to Active This link will always route to the current Active version of the standard. Within each area, five randomly spaced spots are selected.
Measuring Dry Film Coating Thickness According to SSPC-PA 2
Start Webshop Product catalog Product presentation. It describes the methods and recommended frequency for verifying the accuracy of gages and for adjusting optimizing the equipment and lists the reporting recommendations.
On a larger structure with multiple applicators, the measurement and documentation process could be extensive, so the approach was changed in the revision. Any unusually high or low gage readings that are not repeated consistently are discarded. Non-compliant areas are demarcated using removable chalk or another specified marking material and documented. The average of the three acceptable gage readings is the spot measurement; the average atsm five spot measurements is the area measurement.
Measuring Dry Film Coating Thickness According to SSPC-PA 2KTA University
The standard has been updated on multiple occasions. You will have access to the subscription via our webpage standard. The author, Bill Corbett, has replied via email. Magnetic pull-off gages are categorized as Type 1 Fig.
Enter your personal account email address to request a password reset: Provisions for measuring on soft or tacky coatings are described in 5.
A frequency of measurement for coated steel beams girders and coated test panels is also provided in the appendices to SSPC-PA2. The accuracy of Type 2 electronic gages can be verified by placing the gage probe onto a certified coated thickness standard described for Type 1 gages 122 certified shims Figs. August 26, at 2: A test certificate or other documentation showing traceability to a national metrology institution is required.
The number of spot measurements along the edge will vary, depending on the total length of the coated edge. Yet the requirements of SSPC-PA 2 regarding gage calibration, verification of gage accuracy and adjustment procedures, the number of measurements to obtain, and the tolerance of the measurements are complex and should be fully understood by the specification writer before invoking PA 2 in a contract.
The accuracy of Type 1 magnetic pull-off gages is verified by placing the gage probe onto a certified coated thickness standard Figs. The right to access the electronic files of ASTM Standards is for purposes of viewing for individual use only. Dry film thickness gages are calibrated by the equipment manufacturer, its authorized agent, or an accredited calibration laboratory under controlled conditions. Search book title Enter keywords for book title search.
Active view current version of standard. Isolation of nonconforming areas required measurement of each square foot area painted during the work shift. Addresses measurement of coatings on ferrous and non-ferrous metal surfaces.
This measured distance is displayed as coating thickness by the gages. The revisions took five years to complete. Enter your account email address to request a password reset: Five different Coating Thickness Restriction Levels established. If a one-point verification procedure is adopted, the coated standard should be selected based on the intended range of use.
The average of the gage readings is considered a spot 112.
This culminates in a total of 75 spot measurements 15 x 5 and a minimum of gage readings 15 x 5 x 3. Adjustment of Type 2 gages to compensate for astk characteristics described later is typically performed using certified shims.
SSPC-PA2 prescribes a frequency of coating thickness measurement based on the size of the area coated. There were no books found for the applied search filters. We can gather hundreds of gage readings in a relatively short time; batch the measurements; print the data or upload it to a computer for graphing; report the highest, the lowest, the mean, and standard deviation of the collected data; incorporate digital images of d7901 structure or coated area; and even program the gage to produce an audible signal if a spot measurement is outside of the tolerance range.
This average BMR is then deducted from subsequent coating thickness measurements to 1 any effect of the base metal surface and its astmm. Second, some Type 2 gages cannot be adjusted.
This ensures that you are always up-to-date and saves you both time and money. If no Restriction Level is specified, then the default is Level 3, which is based on the version of SSPC-PA 2 asrm many users of the standard have become accustomed to. December 7, at 6: