The Liquefied Gas Carrier National Center of Expertise has released LNG bunkering field notice to provide recommendations to field units where bunkering of liquefied natural gas (LNG) for use as a marine fuel may occur to evaluate the safety of LNG bunkering operations.
The field notice is critically important for all parties involved in liquefied natural gas bunkering operations to fully understand the risks that are presented when transferring LNG.
The notice includes the following recommendations based off best practices and lessons learned observed during recent LNG bunkering operations in order to prevent future incidents:
a. All vessels engaged in LNG bunkering operations should have Coast Guard reviewed procedures for inerting, purging, cool down, loading, and testing of Emergency Shutdown Devices (ESDs) similar to what is seen in a Safety Management System (SMS) prior to conducting LNG bunkering. If the Certification of Inspection is not complete, interim procedures should be developed prior to the vessels first bunkering operation (e.g., preceding sea trials). If the vessel does not fall under a SMS, some alternate procedures should be developed prior to the vessel’s first bunkering operation. The procedures should be reviewed by the Coast Guard prior to any LNG bunkering operations.
b. All vessels engaged in LNG bunkering operations should ensure their crews have specific familiarity with the vessel’s LNG fueling system in addition to training requirements
c. If LNG bunkering preparations and operations last longer than 8 hours, a duty rotation should be developed to ensure personnel involved received appropriate rest.
d. All vessels engaged in LNG bunkering operations should have the ability to produce a historical record of all fueling alarms and valve closure times. These records should be available for inspection.
e. All vessels engaged in LNG bunkering operations should have approved LNG piping drawings/plans from Marine Safety Center that have been verified by the local OCMI that the approved plans meet the as built arrangements, prior to any LNG bunkering operations.
f. A thermal oxidizer, marine flare, or any other equipment that produces an open flame should be placed outside the safety zone if used during LNG bunkering operations.
g. Until the Coast Guard provides workforce development for LNG as fuel and LNG bunkering operations to include PQS, TTP and training to properly prepare field inspectors, local marine inspectors should attend LNG as a marine fuel and LNG bunkering PIC courses.
h. The LGC NCOE should be involved in initial pre-bunkering and bunkering processes to provide LNG expertise for the planning, setup, and the actual operation.
In the event of an LNG bunkering equipment (i.e. gas detector, relief valve, loading valve, and pump) failure, the local Coast Guard office should do an investigation to determine the cause and identify measures to prevent future failures.
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Source: USCG News
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