Alternative Riser Pipe Jointing Method - Pyplok: Progress Report 2015

The aim of this project is to assess Pyplok technology to establish its suitability for the application of an alternative jointing method for steel risers, which removes the need for welding (which requires hot work permits) or screwed fittings which can only be used up to 2" diameter. The project will ascertain the testing which is required to ensure that the product is fit for purpose.

The project was split into 2 stages:

• Stage 1 involved the confirmation of the approvals route of the project, a draft test specification. A final report was produced from Stage 1, which outlines the test specification and has a plan for Stage 2 of the project when we are undertaking the gap closure testing. This Project Progress Report gives an overview of this Stage 1 report.
• Stage 2 determined costs, a final test specification and a gap closure action plan.

Following the initial Pyplok information review and determination of the expected functional requirements, DNV GL have determined a test specification for an alternative riser jointing method merging together existing Gas Industry Specifications and National Grid specifications, as well as using their engineering judgements and knowledge on building regulations and potential changes to the building regulations with respect to fire resistance. A comparison was then made between the test specification that DNV GL have prepared and the testing and approvals that Pyplok already has.

It has become apparent during the project that early engagement with operational departments has ensured that field trials (and associated activities) can be planned and completed easily, leading to the project to run with minimal delays. There will need to be some further trials conducted following the project to move the method to the next TRL level and embed into the business. The Pyplok method, if successful, will be used in conjunction with traditional riser jointing techniques, especially as a replacement when appropriate to welding.