1 / 9

API Spec 6A Tensile Test Spec Reference Requirements

API Spec 6A Tensile Test Spec Reference Requirements. Tim Haeberle API SC6 2012 Summer Meeting. Background. CURRENT WORDING 5.3.5.2 PSL 2 to 4 tensile testing (for mandrel tubing hangers and casing hangers) “b) test method:

zion
Télécharger la présentation

API Spec 6A Tensile Test Spec Reference Requirements

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

  2. Background CURRENT WORDING • 5.3.5.2 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 6892-1or ASTM A370. Perform a minimum of one tensile test. The results of the tensile test(s) shall satisfy the manufacturer’s 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 6892-1or ASTM A370. Perform a minimum of one tensile test. The results of the tensile test(s) shall satisfy the applicable requirements of Table 6.”

  3. Background CURRENT WORDING • Section 5.6.4.1 (for TC’s 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 QTC’s 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”.

  4. The Solution PROPOSED REVISIONS: • Section 5.6.4.1 Paragraph 5 - “ASTM A370standard-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 A370standard-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.”

  5. The Solution JUSTIFICATION: • “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.

  6. API Ballot • Ballot ready for SC6 to approve at the 2012 Summer Meeting for formal balloting

  7. End Of Presentation

  8. Backup Slides

  9. ISO 6892-1 Circular Test Specimens

More Related