Abstract
This paper will briefly discuss past work in the DeepStar® Global Offshore Technology Development Program in Subsea Systems committees DeepStar® 12302 20 ksi Systems, demonstrating the usage of API 17TR8 for verification of a 20 ksi component. Furthermore, a collaborative group of operators have created a new DeepStar satellite program and will share the status of a newly embarked venture to demonstrate the complete design process from the second edition of API 17TR8, including both verification and validation.
Building off past work, and incorporating current industry standards, SI will provide an example analysis that applies independent usage of API 17TR8. The process of developing this report will continue to allow current 20 ksi contributors and operators to comment on the scope of work in both the verification analysis and validation testing protocol. This will help put into practice the use of API 17TR8 document and provide an independent example of its use.
A verification assessment will be performed using API 17TR8 on two assemblies – one specifically targeting global collapse failure modes, and one specifically targeting serviceability failure modes. Like past work, this project includes (1) Generation of Functional Specification, (2) generation of a Failure, Effects, and Criticality Analysis (FMECA), (3) design verification, (4) development of a validation protocol, (5) extreme and survival limits, and (6) a comparison of design and theoretical total life. Beyond the scope of past work, the current validation testing will be performed and will include (1) material characterization, (2) testing to validate the models used in the Load Resistance Factor Design (LRFD) for the global criteria and (3) testing to identify normal, extreme and survival externally applied bending moments, as well as global plastic collapse and serviceability failure modes.
This project will provide the industry with a detailed case study and demonstrate the verification and validation processes of nonproprietary subsea hardware component systematically using API 17TR8 methodology.
