API Spec 6A Tensile Test Spec Reference Requirements Tim Haeberle API SC6 2012 Summer Meeting.

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Presentation Title Subtitle (if needed)API Spec 6A Tensile Test Spec Reference Requirements Tim HaeberleAPI SC6 2012 Summer Meeting#GE Confidential and Proprietary InformationGE2010 All Rights ReservedBackgroundCURRENT WORDING5.3.5.2 PSL 2 to 4 tensile testing (for mandrel tubing hangers and casing hangers)b) test method:Perform tensile tests at room temperature in accordance with the procedures specified in ISO 6892-1 or ASTM A370.Perform a minimum of one tensile test. The results of the tensile test(s) shall satisfy the manufacturers specified requirements.5.4.2.3 PSL 2 to 4 tensile testing (for bodies, bonnets, and end and outlet connections)b) test method:Perform tensile tests at room temperature in accordance with the procedures specified in ISO 6892-1 or ASTM A370.Perform a minimum of one tensile test. The results of the tensile test(s) shall satisfy the applicable requirements of Table 6.#GE Confidential and Proprietary InformationGE2010 All Rights ReservedBackgroundCURRENT WORDINGSection 5.6.4.1 (for TCs for PSL 1) Paragraph 5 - Standard-sized, 12,5 mm (0,500 in) diameter tensile specimens shall be used to qualify carbon, low-alloy and stainless steels, unless the physical configuration of the TC prevents their use. In this case, the standard sub-size specimens referenced in ASTM A370 may be used. Either standard 12,7 mm (0,500 in) or standard sub-size specimens (see ASTM A370) may be used to qualify CRA materials.Section 5.7.4.1 (for QTCs for PSL 2-4)Paragraph 6 - Standard-sized, 12,5 mm (0,500 in) diameter tensile specimens shall be used, unless the physical configuration of the QTC prevents their use. In this case, the standard sub-size specimens referenced in ASTM A370 may be used.PROBLEM: These paragraphs do not state that the standard specimens are ASTM A370 standard-sized specimens. This leaves open the use of ISO 6892-1 standard specimens. Additionally, they refer to the standard sub-size specimens, but the correct term in ASTM A370 is small-size specimens. #GE Confidential and Proprietary InformationGE2010 All Rights ReservedThe SolutionPROPOSED REVISIONS: Section 5.6.4.1 Paragraph 5 - ASTM A370 standard-sized, 12,5 mm (0,500 in) diameter tensile specimens shall be used to qualify carbon, low-alloy and stainless steels, unless the physical configuration of the TC prevents their use. In this case, the standard sub-size specimens referenced in ASTM A370 may be used. Either standard 12,5 mm (0,500 in) or standard sub-size specimens (see ASTM A370) may be used to qualify CRA materials.Section 5.7.4.1 Paragraph 6 - ASTM A370 standard-sized, 12,5 mm (0,500 in) diameter tensile specimens shall be used, unless the physical configuration of the QTC prevents their use. In this case, the standard sub-size specimens referenced in ASTM A370 may be used.#GE Confidential and Proprietary InformationGE2010 All Rights ReservedThe SolutionJUSTIFICATION:ASTM A370 needs to be added to clarify that the only specimen sizes currently permitted are the ASTM A370 specimen sizes. ISO 6892-1 includes different size specimens that have a higher gage length to diameter ratio. The longer relative gage length of the ISO 6892-1 specimens can result in failure to meet the API 6A specified elongation acceptance criteria.The use of ASTM A370 specimen sizes meets ISO 6892-1, since ISO 6892-1, section 6.1.1, paragraphs 7 and 8 state:The dimensional tolerances of the test pieces shall be in accordance with the Annexes B to E (see 6.2). Other test pieces such as those specified in relevant product standards or national standards may be used by agreement with the customer, e.g. ISO 3183 [1] (API 5L), ISO 11960 [2] (API 5CT), ASTM A370 [6], ASTM E8M [7], DIN 50125 [10], IACS W2 [13], and JIS Z2201 [14].ASTM A370 specimen sizes are routinely used in the US and Europe.#GE Confidential and Proprietary InformationGE2010 All Rights ReservedAPI BallotBallot ready for SC6 to approve at the 2012 Summer Meeting for formal balloting#End Of Presentation#GE Confidential and Proprietary InformationGE2010 All Rights Reserved7Backup Slides#GE Confidential and Proprietary InformationGE2010 All Rights Reserved8ISO 6892-1 Circular Test Specimens#GE Confidential and Proprietary InformationGE2010 All Rights Reserved

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