<html> <head> <title>Rule 61:08:09:29 Ultrasonic examination for thickness determination.</title> <META NAME="Keywords" Content="Administrative Rules 61:08:09:29"> <META NAME="Description" Content="Administrative Rules 61:08:09:29 Ultrasonic examination for thickness determination."> <meta name=Generator content="Microsoft Office HTML Filter 2.0"> <meta http-equiv=Content-Type content="text/html; charset=windows-1252"> <meta name=Originator content="Microsoft Word 10"> <style> <!-- --> </style> </head> <body lang=EN-US> <div> <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>61:08:09:29.&nbsp;&nbsp;Ultrasonic examination for thickness determination.</b> Ultrasonic examination for thickness determination may be made using the pulse-echo technique. Ultrasonic examination provides indications of surface and subsurface discontinuities. If an ultrasonic thickness reading is below a desired value, the area around that reading must be examined as follows:</p> <p>Using the low reading point as the center, superimpose an 8-inch point as the center, superimpose an 8-inch square on the area, and take 20 readings spaced on 2-inch centers on the perimeter and within the square. The average of these 20 readings is used as the minimum boiler thickness in the 8-inch square area.</p> <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>Source:</b> 23 SDR 139, effective March 5, 1997.</p> <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>General Authority:</b>SDCL <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=34-29A-14.1">34-29A-14.1.</A></p> <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>Law Implemented:</b>SDCL <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=34-29A-14.1">34-29A-14.1.</A></p> </div> </body> </html>