Compulsory enforcement of double hull structure and a phase-out of single hull structure were introduced by IMO(International Maritime Organization) with the effectuation of OPA90(Oil Pollution Act 90) due to ocean pollution by marine accident of Exxon Valdez on Alaskan in 1989. After that, marine accident of Erika occurred in 1999. Under the circumstances, the plan to abolish single hull structure was advanced a date.
Besides, SOLAS Reg.II-1/3-6 that includes reinforcement of installation of means of access for inspection as a part of ESP(Enhanced Survey Program) for bulk carrier and oil tanker was established, it has been applied to those vessels built since 01 of January in 2005.
And IACS (International Association of Classification Societies) organized Joint Working Group with the classification society, shipping companies and shipyard of each country and developed the detail application standards for Technical Provision related to SOLAS Reg.II-1/3-6
In this study, Contents of the new compulsory SOLAS Reg.II-1/3-6 and Technical Provision have been investigated and applied to the double hull panamax oil tanker.
For effective means of access, new conceptual midship section is developed from the improvements of structural shape for the primary structure as well as the modified structural arrangements.
Additionally, structural stability for the developed midship section is carried out by SafeHull of ABS which is the program to calculate structure strength.
The scantling and structure analysis for the midship section introduced in this paper is carried out by STX shipbuilding and ABS(American Bureau of Shipping) together.
It is the first attempt that the above-mentioned midship section is applied to the panamax oil tanker with plane type bulkhead. Therefore the introduced midship section is expected that it is helpful for the design considered to install permanent means of access.