Paillette Palaiologou, vice chairman South East Europe, Black Sea & Adriatic Zone at Bureau Veritas Marine & Offshore, presents AiP certificates to Mauro Evangelisti, president of Gas and Heat S.p.A
While LNG is anticipated to be broadly used this decade, different fuels are beneath scrutiny and shipowners have gotten more and more centered on multi-fuel provide methods in a position to deal with two or extra totally different fuels. This prompted Italy primarily based liquefied fuel dealing with system specialist Gas and Heat S.p.A. to embark on a research to determine potential choices and to develop options. It has now gained an Approval in Principle from classification society Bureau Veritas (BV) for its versatile answer for the transport of LNG and ammonia.
In a research supported by BV, GH demonstrated that IMO Type C cargo/gas tanks made with a particular grade austenitic metal can transport each LNG and ammonia for sea-going and inland navigation.
GH has used austenitic metal with a particular grade for LNG containment since its Approval by Bureau Veritas in Jun, as an “alternative material” by way of the IGC/IGF Code. The compatibility of this materials with ammonia has been verified by a particular stress corrosion cracking take a look at carried out by GH after which authorised by Bureau Veritas in August 2022.
Twelve specimens had been ready for the checks in accordance with ISO 16540, which supplies pointers on evaluating the corrosion of metals and alloys by figuring out their resistance to emphasize corrosion cracking utilizing the four-point bend technique. This methodology contains procedures for metals that haven’t any distinct yield level of their stress-strain habits in addition to metals with a definite yield level.
Throughout the take a look at, the specimens had been loaded as four-point-bend (FPB) take a look at topics to the required minimal yield energy of the bottom materials. Tests had been then carried out in three totally different situations: at ambient temperature, -20C, and -33C, in an atmosphere of pure ammonia. After the completion of all checks, every specimen was visually examined at 10x magnification by a stereoscopic microscope and subjected to fluorescent liquid penetrant examination to detect any seen floor crack. An extra tomographic scan was carried out to determine that no internal crack was detected.
According to Bureau Veritas, the outcomes efficiently demonstrated that cargo/gas tanks manufactured from austenitic metal can carry each LNG and ammonia, for seagoing and inland navigation.
BV was concerned from the very earliest phases, validating the stress take a look at methodology and reviewing every section of the take a look at. The society confirmed that the utilized methodology opens the best way to design and construct LNG/Ammonia tanks that adjust to the worldwide code for the development and gear of ships carrying liquefied gases in bulk (IGC Code) and the worldwide code of security for ship utilizing gases or different low-flashpoint fuels (IGF Code), in addition to relevant BV’s classification guidelines for seagoing and inland navigation.
Paillette Palaiologou, vice chairman South East Europe, Black Sea & Adriatic Zone at Bureau Veritas Marine & Offshore, stated: “While the shipping industry is facing many uncertainties, it is the role of class to support the industry in this period of change. I am proud of the work accomplished by both teams and the results are extremely positive for the industry. Providing different options will be key for industry stakeholders as they make decisions. We look forward to collaborating with GH on new projects.”
Mauro Evangelisti, President of Gas and Heat SpA, stated: “Innovation has always been and will remain our main focus. This study is part of the innovation journey the industry needs for a smart and sustainable transition to a greener future. We hope the use of this material will provide more cost-effective and safer components to the industry.”
GH has already secured one contract that features the availability of cargo tanks for inland navigation of LNG/ammonia and one other for a seagoing LNG/ammonia gas provide system.
