BS IEC IEEE 61886-1 pdf free download

BS IEC IEEE 61886-1 pdf free download.Subsea equipment.
4.5 Design analysis
The connector assemblies shall be subject to a design analysis on the critical areas of the design to verify that the design is capable of withstanding the stresses to which it may be subjected at all stages of its life. The design analysis shall as a minimum contain the following.
• The connector assembly design shall be subject to a design failure mode effect and criticality analysis (DFMECA) and the results documented. The output from the analysis shall be used to identify areas of interest for further analysis, testing and quality controls. It may be necessary to augment the testing programme given in this document in order to evaluate features of the design that have been identified by the DFMECA.
• Electrostatic, magnetic, thermal and mechanical finite element analysis, covering type tests and intended operational conditions shall be undertaken to evaluate the performance of the design where the performance cannot be inferred from other analysis. Consideration shall be given to worst-case design loads (e.g. test, storage, handling, installation/retrieval and operation) including fault scenarios (e.g. broken seal, short circuit) such that the design loads do not exceed electrical, thermal or mechanical limitations for any material. The analysis shall include the heat generated by the losses in the connector assembly itself. The analysis should also include possible nonlinear material properties.
• Calculations to verify suitability of the pressure compensating system shall be undertaken. The analysis shall include test, storage, transportation, installation/retrieval and operational conditions. Any hysteresis (lag) in the performance of the compensation system shall be included.
• The material properties and limitations used in the analysis shall be identified and documented based on qualified, recognised and repeatable fabrication processes. This is also applicable for bonding between materials.
4.6 Data sheet
A data sheet shall be created for each connector assembly. As a minimum, characteristic data for the connector assembly shall be documented in the format given in Annex A.
5.4.2 Rapid gas decompression
Connector assemblies or parts of connector assemblies that will be in contact with production fluids shall be tested for rapid gas decompression. Allowable operational changes in pressures and tolerance to rapid gas decompression (RGD) shall be documented where applicable. Tolerance to RGD shall be stated in the data sheet.
5.4.3 External forces
Rotational forces, vibrations, tensions, compressions shall not impair the function or quality of
the connector assembly, throughout design service life.
A retaining mechanism for securing sheaths, screens and armour shall be incorporated in the connector assembly design, in order to verify mechanical and electrical suitability.
The connector assembly shall have an impact protection rating, IK1O, according to IEC 62262.
5.5 Material requirements
5.5.1 General material requirements
The connector assemblies shall meet the following requirements.
a) The connector assembly shall comprise proven materials and components, which are qualified and suitable for relevant equipment, applications and environments, and the design life. The connector assembly shall be compatible throughout design service life with the relevant interfacing medium and materials as defined in the operational requirements specification.
b) Seal materials shall be compatible with all applicable interfacing materials and media, even if one seal should fail.BS IEC IEEE 61886-1 pdf download.