API TR 17TR7-2017 pdf free download

API TR 17TR7-2017 pdf free download.Verification and Validation of Subsea Connectors.
3.1.8 external loads Includes global load effects like axial loads, bending moment, torque, and shear. 3.1.9 finite element analysis FEA Numerical method for analyzing dynamic and static response by dividing the structure into small continuous elements with the given material properties. NOTE The analysis can be local or global. 3.1.10 fracture mechanics Assessment and analysis where critical defect sizes under design loads are identified to determine the crack growth life, i.e. leak or fracture. 3.1.11 functional capacity Loading condition where the functional failure criteria specified for the component is met but not exceeded. 3.1.12 hub face separation Separation is defined as zero contact forces between the mating hubs (from ID to OD) on the tension side of the applied load condition. 3.1.13 leak tightness capacity Maximum load combination that may reliably be applied before leakage occurs in the connector. 3.1.14 load, extreme Conditions that include the unavoidable but predictable load conditions due to the environmental and operating scenarios. 3.1.15 load, normal Conditions that corresponds to a design factor of 0.67 with respect to SMYS. 3.1.16 load, survival Conditions which include the unplanned, unavoidable, and unpredictable load conditions due to the environmental, operating, or any other scenarios. NOTE 1 Also referred to as accidental load. NOTE 2 Survival loads of a component means that the component does not fail but it can present one or more kinds of degradations that may impact its specified performance or service life.
3.1.17 permanent equipment Equipment installed for production over the life of the well. 3.1.18 rated working pressure RWP Maximum internal pressure that the equipment is designed to contain and/or control. 3.1.19 service life Duration of time in which the equipment performs under the specified design conditions, i.e. time in active connected riser operations, excluding storage periods. NOTE The service life is normally a small fraction of the design life. 3.1.20 S-N curve Quantitative relationship between the fatigue stress, S, and the number of cycles, N, corresponding to a specific probability of failure for a detail, derived from test data. 3.1.21 specified minimum yield strength SMYS Minimum yield strength at room temperature prescribed by the specification or standard under which the material is purchased. 3.1.22 stress amplification factor SAF Equal to the local peak alternating stress in a component (including welds) divided by the nominal alternating stress in a defined reference section somewhere in the system (e.g. through wall section of the wellhead above or below the locking profile). NOTE This factor is used to account for the increase in the stresses caused by geometric stress amplifiers which occur in connector components. 3.1.23 stress concentration factor SCF Equal to the local peak stress in a component (including welds) divided by the nominal stress in the component cross- section at the location of the local peak stress. 3.1.24 structural capacity Maximum load(s) the connector can sustain without exceeding the allowables for normal, extreme, or survival conditions and still maintain functional requirements. 3.1.25 temporary equipment Equipment that is used on a well for installation or workover purposes and is not considered a permanent part of the production equipment.
4.3 Performance Requirements 4.3.1 Structural Performance The structural capacities of the connector shall be verified through calculations and validated with full-scale testing. The performance validation testing program shall include, at a minimum, one physical full-scale test for design documentation to provide the operating range of various load combinations. Local bearing damage failure between the connector’s locking mechanism and the body may result in preload loss, which should be carefully assessed to ensure that the performance of the connector is not adversely affected. 4.3.2 Leak Tightness Leak tightness capacity is the maximum load combination that may reliably be applied before leakage occurs in the connector. For normal and extreme load conditions, the connector shall be leak tight for the applicable fluid. If a connector is not leak tight at survival load conditions, the connector shall be re-tested and shall meet the leak tightness criteria at extreme load conditions. If the connector is not leak tight for survival load conditions, it shall be documented as such on the capacity chart. The applicable fluid may be used during load capacity testing of connectors for use in gas service, but the seal shall be qualified with gas per API 6A, Annex F. The requirements for leak tightness are the same for both internal and external pressure.