Offshore staff
OSLO, Norway – DNV has published new procedures concerning safety level in transporting CO2 through pipelines for carbon capture and storage (CCS) projects.
It follows the CO2SafeArrest joint industry project between Energy Pipelines CRC (Australia) and DNV.
This involved two large-scale CO2 crack arrest tests on 24-in. pipelines at DNV’s R&D facility in the UK to determine the safety implications of CO2 releases.
Results have been incorporated into the updated recommended practice (RP), DNVGL-RP-F104 Design and operation of carbon dioxide pipelines, with a new empirical model for the assessment of running ductile fractures in CO2 pipelines.
The RP can also be used alongside DNVGL-ST-F101 Submarine pipeline systems.
Transport of CO2 can be performed via existing pipelines or purpose-built new pipeline systems. DNVGL-RP-F104 applies in both cases.
To re-qualify the pipelines for CO2 transport, the main requirements are identified via a change of medium in the pipeline, for example, from natural gas as in the original design, to CO2.
In all cases, the pipeline operators need to fully assess the potential threats, failure mechanisms, consequences and probabilities of pipeline failures to ensure safe operation, DNV added.
04/07/2021
