ASTM D7091 – 12 PDF

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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The revisions took five years to complete. Recently I had problem while calibrating. You are not calibrating the coating thickness gage, but rather verifying accuracy, then adjusting.

It, too, was published in There are three categories of coated area: Don, The standard is independent of the substrate type, as long as the substrate is a ferrous or non-ferrous metal. Thank you so much for the information on this page. This includes personalizing content and advertising. October 17, at 8: If you like to setup a quick demo, let us know at support madcad. Arguably the most critical section in the document, Section 8, describes how many sstm to check, the size of the areas, the number of measurements to obtain sstm each area, and the steps to take if spot or area measurements do not conform to the specification.

Depending on the coating type and the prevailing service environment, the specifier can select the DFT restriction level for a given project.

Dry film thickness gages are calibrated by the equipment manufacturer, its authorized agent, or an accredited calibration laboratory under controlled conditions.

Register for a trial account. A minimum of three gage readings is obtained in each spot, culminating in a minimum of 15 gage readings within an area. The Table enables the specifier to select from five different restriction levels related to spot and area measurements. Link to Active This link will always route to the current Active version of the standard. dd7091

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Measuring Dry Film Coating Thickness According to SSPC-PA 2KTA University

You currently cannot view this content. If the gage is dropped or suspected of giving erroneous readings during the work shift, its accuracy should be rechecked.

Verifying accuracy of Type 2 gage 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.

Level 1 is the most restrictive and does not allow for any deviation of spot or area measurements from the specified minimum and maximum thickness, while Level 5 is the least restrictive. Thanks to the author for the explanation. Place a measured shim comes with the gage onto the prepared, uncoated metal surface to be coated; Adjust the gage reading to match the thickness of the shim. This was a great read. These readings represent the effect of the substrate conditions on the coating thickness measurement device.

Verifying accuracy of Type 2 gage on a certified coated standard. If spot measurement variances result in area measurements that do not meet x7091 specification, then additional spot measurements are acquired radiating outward in eight directions from the nonconforming area to determine the magnitude of the non-conforming thickness.

Non-compliant areas are demarcated using removable chalk or another specified marking material and documented. The certified shim should be placed onto a smooth, uncoated metal surface to remove dd7091 effect of the surface roughness during this process.

ASTM D7091:12

Per Specification Conformance to Specified Thickness: Enter your personal account email address to request a password reset: Conformance to Specified Thickness: The author, Bill Corbett, has replied via email. By continuing to use our site, you accept our use of cookies To learn more, click D77091 More to view our Privacy and Cookies Policy. Addresses measurement of coatings on ferrous and non-ferrous metal surfaces. The scale is not linear, as will be discussed below.

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It is the responsibility of the user asfm this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

This procedure also verifies that the probe ashm will accommodate the edge configuration before acquiring coating thickness data. Click Here to Read the Updated Article. This service is not available if you are a URL user where you do not log in with an email address. If there is no place to measure in a given direction, then no measurement in that direction is necessary.

For c7091 given measurement direction or unit measurement, any compliant area or unit preceding a non-compliant area or unit is designated as suspect, and, as such, is atsm to re-inspection after corrective measures are taken.

Sectors Arbeidsliv Bygg, anlegg og eiendom Elektro Elektronisk komm. Another change in the version of the standard is the procedure for identifying nonconforming areas Fig.

One type of magnetic gage referenced in original SSPC-PA 2 for measuring dft Figures courtesy of the author except where otherwise indicated. We use cookies to understand how you use our site and to improve your experience. A minimum thickness and a maximum thickness are normally specified for each layer of coating.

The steps are incorporated by reference in SSPCPA 2 and are completed before obtaining coating thickness measurements to determine conformance to a specified coating thickness range. You do not need to zero the gage.

Measuring Dry Film Coating Thickness According to SSPC-PA 2

The total number of spot and area measurements is based on the total square footage of pipe on the cart or rack. For these gages, a permanent magnet is brought into direct contact with the coated surface. Asstm feel empowered and have gained valuable knowledge.