Hyundai Mipo Dockyard (HMD) had received approval in principle from DNV GL for a LPG carrier design that employs a double side-hull to offer increased protection of liquefied gas tanks.
The LPG SAFE (structural advances for the environment) concepts is said to be the first 38,000m3 capacity LPG carrier design to employ a double side-hull, with an innovative layout resulting in the same cargo capacity and construction costs as a conventional vessel.
Dug Ki Min, vice president, HMD Seoul, said: “We have been able to maintain the same cargo capacity as the single side-hull design by optimising the structural configuration of the no. 1 and no. 3 cargo tanks design, in combination with finite element (FE) analysis and using the DNV GL rules to optimise the scantlings, weight and hull strength. The new design with its simple hull shape and double hull construction could offer our employees an improved working environment during production of the vessel, resulting in higher quality deliveries.”
LPG carriers carry liquefied gases such as propane or butane in bulk. The ships are normally equipped with Type A independent cargo tanks arranged inside the hold, supported on insulation-bearing blocks which typically consist of wooden chocks installed on the inner bottom structure. The double side-hull design is said to offer a significant increase in protection for these tanks, especially in the event of a collision.
The approval in principle certificate confirms that the design complies with the new DNV GL rules for the classification of ships. Hwa Lyong Lee, regional business development manager, DNV GL – Maritime, added: “The LPG SAFE design has shown a measurable improvement in safety, while retaining capacity, strength and cost, and we are very honoured that HMD selected us to work with them to realize this extremely interesting and exciting concept.”