New Materials R&D Expert
16:30 - 17:00
Wednesday, 18 September 2019
T2.6 ISO 20088 for better CSP safety
Operating LNG liquefaction units in offshore conditions has raised new safety considerations. Liquefied Natural Gas (LNG) being a cryogenic media, hull and topsides assets protection against cryogenic spillage is among the most critical concerns, as load bearing structures cannot be design against these accidental cases.
The steel decks and structures of a Floating Liquefied Natural Gas (FLNG) must be secured against brittle fracture that can follow accidental LNG spillage. The resultant structural failures put at risk lives and assets, yet LNG spill mechanisms are barely understood and the epoxy materials used so far for Cryogenic Spillage Protection (CSP) are expensive and can be improved.
For the first FLNG projects, CSP materials were derived from passive fire protection (PFP) with increased thicknesses to extend the domain of application. A need for improvement was identified both in CSP material performance testing and product design.
In order to propose a better protection at better cost and enhance structural integrity and to lower risks which occur during cryogenic spillage on marine structures, TechnipFMC as FLNG market leader, has develop in-house tools such as a testing rig combining active standard development.
In this paper, we will present the outcome of TechnipFMC led Joint Industry Project as well as ISO activity on monitoring CSP materials performance rapidly exposed to cryogenic liquid release.
During the JIP test campaign, many products were evaluated for their ability to improve structural design and decrease the need for IMR (Inspection Maintenance and Repair). Initial screening by cryogenic exposure was followed by physical tests to assess mechanical performances.
In parallel, we participated to the creation of an ISO committee (ISO TC67/SC9/JWG3) dedicated to the publication of standards on testing materials for CSP application.
The paper will present our tests results and the test method to assess material resistance during accidental cryogenic release now included in a new standard in pool condition: ISO 20088-1. We will also introduce the cryogenic jet release condition now part 3.
Future part of the standard will be discussed namely Cryogenic Vapor phase Part 2.