The U.S. Coast Guard (USCG) issued a policy letter regarding the design standards for U.S. Barges carrying LNG in bulk. The policy recommends design details for barges carrying LNG in bulk within the existing regulatory framework.
The increase in domestic production of natural gas has generated renewed interest in the transportation of LNG in bulk via barge. Applications include the transportation of LNG between shore-based facilities along inland and coastal routes and the use of barges to bunker ships which use LNG as a fuel.
All barges designed to carry LNG in bulk must meet the requirements of 46 Code of Federal Regulations (CFR) Chapter I, Subchapter D (Subchapter D); however, Subchapter D is silent on details with respect to many design aspects (e.g., it requires “adequate notch toughness”, “suitable material”, “suitable for the temperatures”, etc.) Self-propelled vessels carrying LNG, in addition to Subchapter D, are required to meet Part 154 in 46 CFR Chapter I, Subchapter O (Subchapter O), which provides more detail specific to carrying LNG in bulk. Non self-propelled vessels carrying LNG, however, are not required to meet Subchapter O.
The USCG has received requests from industry seeking clarity regarding the application of Subchapter D to non-self-propelled vessels carrying LNG in bulk. The USCG consulted with the Chemical Transportation Advisory Committee (CTAC) and the public through a series of seven public meetings regarding the best way to address the issues raised in these requests. This outreach was designed to help us address the vessel designs that were most likely to be adopted first. CTAC recommended that 46 CFR Part 154 be used as a basis for recommending the design details for non selfpropelled vessels because it has specific standards, based on international guidelines, for the safe transport of LNG in bulk. The Coast Guard used the CTAC recommendations to develop the policy letter.
You may read the policy letter by clicking here.
Source: USCG
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