API - RP 5C5
Recommended Practice for Evaluation Procedures for Casing and Tubing Connection
|Publication Date:||1 November 1996|
This document specifies tests to be performed to determine the galling tendency, sealing performance, and structural integrity of casing and tubing connections. It is intended that the words casing and tubing apply to the service application rather than to the diameter of the pipe. Connection evaluation by procedures other than testing is beyond the scope of this document. Interpolation and extrapolation of test results to connectors in other size, weight, grade, and materials is the responsibility of the user.
Example relationships between test classes and service application are suggested in Table 1. Other relationships may be more appropriate for individual users. Class I connections are intended for the most severe applications while Class IV connections are intended for the least severe applications. The types of tests and number of test specimens (indicated in Table 2) increase with the test class and service application. Class I tests include strain gauges on some specimens to enhance interpretation of connector performance. The failure tests for Class I and Class II connections are intended to provide data to determine quantitative estimates of connection structural reliability.
Tests on connections with multiple independent internal pressure seals shall include separate tests on two seals.
Supplementary tests may be appropriate for specific applications that are not evaluated by the tests herein. The user and manufacturer are encouraged to discuss well applications and limitations of the connection being considered.
Representatives of users or other third-party personnel are encouraged to monitor tests.
Quality control procedures for manufacture of test specimens shall be thoroughly documented consistent with procedures used for connections manufactured for well service and shall be retained in the Manufacturer's Detailed Test File.
The connection manufacturer shall certify that the connections manufactured for well service are of the same design and manufactured to the same dimensions and tolerances as those used in the evaluation tests.
Instructions in this document shall be followed. If adverse conditions not specifically addressed in these procedures are encountered, any resulting deviations to procedures shall be thoroughly documented in the summary report.
A manufacturer who completes tests in accordance with this document should submit a copy of the test results in the format specified in Appendix D to the API Production Department office. This copy shall be dated and reported test results certified by a management official of the reporting company. These reports, being public information, will be the subject of an annual report attached to the standardization conference agenda. The report will list all reports filed in the order received with the date received, test category (class and application), name of connection, drawing number, revision number (and date), pipe size, weight and grade, reporting company, and cost to order test report from API. A current list with additions since the last annual report will be maintained and supplied upon request. The report provided to API (as specified by Appendix D) will be maintained for at least 17 years after the date of receipt by API. Copies of the summary report (Appendix C) or full report (Appendix D) may be ordered from the API Production Department office.
API makes no warranty as to the accuracy or completeness of such reports. Questions regarding application of test results should be referred to the reporting company.
It shall be the responsibility of a manufacturing company that files a report to maintain copies of certified test results (documents required by Appendix D) and the Manufacturer's Detailed Test File. When test results have been reported to API, any subsequent change in the manufacturer's product specification shall be reported to API along with the new drawing number and revision level. The changes will be placed as an addendum to the original test report and presented separately in the annual API report under the category addendum.
When tests results are presented in verbal or written reports, articles, or advertisements and state that the tests were made in accordance with this document, such reports, articles, or advertisements shall not be worded to imply that the American Petroleum Institute either recommends or approves use of the subject connection(s).