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AGENDA WI2318a + W2348 21st january 2013 API Research on DCB testing (in frame of RGSSP)

AGENDA WI2318a + W2348 21st january 2013 API Research on DCB testing (in frame of RGSSP). 1/DCB Testing of C-110 in Standard and Mild Conditions For Determination of Klimit => Cedric Linne WI2318a 2/ Methodolgy to provide Mechanical Assurance in DCB test Young’s modulus discussion

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AGENDA WI2318a + W2348 21st january 2013 API Research on DCB testing (in frame of RGSSP)

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  1. AGENDA WI2318a +W234821st january 2013API Research on DCB testing (in frame of RGSSP) • 1/DCB Testing of C-110 in Standard and Mild Conditions For Determination of Klimit • => Cedric Linne WI2318a • 2/ Methodolgy to provide Mechanical Assurance in DCB test • Young’s modulus discussion • =>Gustavo Kissner WI2348 • 3/Development of sour service application limits for API 5CT Grade C110 => John Martin

  2. WI2318a API Research on DCB testing of C11021st january 2013 • DCB Testing of C-110 in Standard and Mild Conditions For Determination of Klimit (WI2318a) • Testing Plan for 2013 • V&M presentation on Klimit of C110

  3. WI2318a API Research on DCB testing of C110 (in frame of RGSSP) WI TARGETS 1/ Define correct procedure of DCB testing 2/ Define acceptance criteria for compliance aspect 3/ Define threshold of K1SSC for C110 in mild sour environment to resolve informative SR39

  4. WI2318a API Research on DCB testing of C110 (in frame of RGSSP) UPDATE • No possibility to launch project end 2012 for budget reason • Finally API approval obtained yesterday • => activity at OMNI will be actively running over H1 2013 • =>1st results for discussion at june 2013 meeting in Washington

  5. DCB Testing of C-110 in Standard and Mild Conditions For Detrmination of KLimit • New Plan for 2013-2014 study at OMNI (budget 180 kUSD) 5 commercial pipes donated from 3 vendors Covered in WI2348 prirority

  6. Klimit of C110 in NACE A sln Status • Klimit is still controversial but its importance may grow up in the future • Recommendation in the new revision of the NACE TM0177 • Two specific cases will bring arguments pro or against Klimit • Klimit as function of the specimen size • Klimit as function of the initial crack length Work scop • Comparison of Klimit of C110 in NACE A slnobtained using different sizes of specimens • Standard size Chevron notch without precracking • Standard size Chevron notch with precraking: planar strain • Subsize Chevron notch without precracking

  7. Klimit of C110 in NACE A sln Tests results - 1 Klimit = 26.8 MPa.m1/2 Klimit = 24.2 MPa.m1/2 Klimit = 20.3 MPa.m1/2

  8. Klimit of C110 in NACE A sln Conclusions • No influence of precracking on K1ssc • Klimit sub < Klimit std • Means that Klimit is not independent of the specimen size • Still some pending question about Klimit • variation of KIapplied by δ is not equivalent to a variation of KIapplied by ai • KIapplied does not control alone KISSC • KIappliedis not the key factor to explain the influence of the arm displacement on KISSC • New tests….follow up at June 2013 meeting • Using longer precracking • To confirm 1st results

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