<p> API 1104 - Subcommittee on Nondestructive Testing Procedures Meeting Wednesday & Thursday – January 27 & 28, 2009 New Orleans, La. ______</p><p>Subcommittee Report</p><p>1. There were 8 attendees, 4 members and 4 visitors. 2. Issues discussed included:</p><p> a. Radiographic requirements for double wall exposures with double wall viewing (DWE/DWV) IQI sensitivity issues. A report was submitted by Tom Reeder via email and discussed by Dave Culbertson. An initial result of testing indicates that wire IQI selection should be based on 2 times the wall thickness instead of 1. </p><p>Elliptical Exposure Technique (DWE/DWV) w/single wall IQI Sensitivity:</p><p>Task group indicates that using an IQI based on single wall thickness with x-ray is ok however the same exposure with gamma is not unless smaller focal spot is used or film type changed. </p><p>The simple answer for this type of exposure is to select an IQI based on twice the wall thickness. </p><p> b. Proposed wording and illustrations describing acceptable wire IQI images, wire locations, and placement within the IQI packets. </p><p>11.1.5 Selection of Image Quality Indicators (IQI) Change NOTE: that currently reads: “For the purposes of IQI selection, the thickness of the weld shall mean nominal wall thickness plus the weld reinforcement (internal plus external combined). To read as follows: “For purposes of IQI selection when (SWV) Single Wall Viewing techniques are used (the thickness of the weld) shall mean nominal wall thickness plus the weld reinforcement (internal plus external combined). When the superimposed (DWV) Double Wall Viewing technique is used (the thickness of the weld) shall mean twice the nominal wall thickness plus twice the weld reinforcement (internal plus external combined). When the elliptical (DWV) Double Wall Viewing technique is used (the thickness of the weld) shall mean twice the nominal wall thickness plus the single weld reinforcement (internal plus external combined).</p><p> c. Consider revision of Section 11.4 to include separate sections for AUT and manual UT. – Chuck Woodruff. Task group now looking at merits and need for such breakout. Refining current wording is best solution. </p><p>John Kern Don Stevens</p><p>Returned to task group for additional work. </p><p> d. Discussion on evaluation of stacked imperfections in a workmanship environment. – still need input from Fracture Mechanics Subcommittee on this issue. </p><p>Fracture Mechanics accepts the criteria for single flaw height of ¼ T (9.6.2.1b), however, criteria stacked flaws is still unresolved (9.6.2.1c).</p><p>9.6.2 Acceptance Standards Change 9.6.2.1 item c. “Multiple indications at the same circumferential location with a summed vertical height (through-wall) dimension exceeding one half the wall thickness.” To read as follows: “Multiple indications at the same circumferential location with a summed vertical height (through-wall) dimension exceeding one quarter the wall thickness.”</p><p>3. ASTM Standard E1961-06 Standard Practice for Mechanized Ultrasonic Testing of Using Zonal Discrimination with Focused Search Units. ASTM would like to have this standard referenced in 1104 and would like our comments and or concerns about this Standard that would make it acceptable for inclusion as a reference in 1104. 4. Subcommittee : Recommends that we do not include the ASTM standard as a reference in API 1104. The decision is based on the fact that 1960 has a limited scope of application and does not include current technologies in use.</p><p>New Business: </p><p>PHMSA Report:</p><p>Based on the presentation by PHMSA concerning recent failures of pipeline welds; some of which were classified due to NDT, the NDT subcommittee request that PHMSA provide either the Incident reports or the details of failure mechanism. The NDT subcommittee will aggressively examine these reports/facts in order to discern root cause(s) and any impact on current wording within NDT section of API 1104. 8.4.2 RECORD Propose to change last two sentences to read as follows: All Levels of nondestructive testing personnel shall be recertified at least every 5 years.</p><p>11.1.5 Selection of Image Quality Indicators (IQI) Change portion that currently reads: “At the radiographic contractor’s option, smaller wire diameter IQI than those specified above may be used, provided the required radiographic sensitivity is obtained.” To read as follows: “As an option, smaller wire diameter IQI than those specified above may be used, provided the required radiographic sensitivity is obtained.”</p><p>2008 NDT Subconnittee Attendees:</p><p>Marshall L. Farley Construction Superintendent Gas T&S Engineering 1945 West Pamall Road P23-304 Jackson, Mi 49201</p><p> [email protected]</p><p>Dave Culbertson El Paso</p><p>[email protected]</p><p>Tom Reeder Central NDT</p><p> [email protected]</p><p>C. P. “Chuck” Woodruff, Jr. SeaOne Maritime Corp.</p><p> [email protected]</p><p>John Kern GE Inspection Technologies [email protected]</p><p>Timothy Burns Shell Oil [email protected]</p><p>Harry Harrison Bechtel Corp [email protected]</p><p>Alex Shpunt Global Industries [email protected]</p><p>Jeremy Peterson Smith Intl. [email protected]</p><p>Jan Van Der Ent Apply US RTD [email protected]</p><p>[email protected]</p><p>Sam Saha US Steel [email protected]</p>