SUMMARY. Most oil tankers are currently of "single hull" design. Following the grounding of the Exxon Valdez tanker in 1989, the United States introduced the Oil Pollution Act of 1990 (OPA 90), making it mandatory for all tankers calling at ports in the United States to have double hulls. For single-hull oil tanker conversion into double-hull oil tanker, SOLAS regulation II-1/3-2 as adopted by resolution MSC.216(82) is to apply to dedicated water ballast tanks if constructed with all structural members being entirely new. The double hull compliance dates of 46 U.S.C. The new EU regulation ensures that all changes to the original regulation from 2002 are gathered together - helping to create transparency in community laws and increaseing the ease at which the rules can be understood. The History of Double Hull Tankers. This book illustrates examples of structural deterioration and damage, and highlights … To determine a tank vessel's double hull compliance date under OPA 90, use the vessel's hull configuration (i.e., single hull; single hull with double sides; or single hull with double bottom) on August 18, 1990. Sixty percent (9 of 15) of the double-hull designs had indices greater than 1.0, indicating equivalency to IMO's reference ships. The report, Tanker Technology: Limitations of Double Hulls, concludes that Enbridge’s pledge to use double-hulled tankers to service its 3703a(c) are set out in appendix G to this part. If converting existing spaces into water ballast tanks with part of the existing structural members
Now since hull is the major component of ship structure they were revised to double hull structure. SOINTULA, B.C.— A report by Living Oceans Society has identified numerous safety concerns associated with double-hull tankers, including corrosion and stress levels, that make the vessels an unsuitable panacea for oil spill prevention. Regulation (EC) No 417/2002 of the European Parliament and of the Council of 18 February 2002 on the accelerated phasing-in of double hull or equivalent design requirements for single hull oil tankers and repealing Council Regulation (EC) No 2978/94 [See amending acts]. But with growing accidents such as with Nissos Amorgos, Sea Empress and Sanchi tanker leading to acute damage to marine life and environment; the IMO took step to revise Marpol regulation 1 to phase out all single hull tankers till 2026. In 1995, the Oil Pollution Prevention Regulations were amended to incorporate these Standards by reference in section 14.2, which states “Any oil tanker that is engaged in voyages that take place in waters under Canadian jurisdiction shall The EU regulation on double-hull oil tankers stems from a set of rules adopted by UN’s maritime organisation, IMO.
1.
Double Hull Standards for Vessels Carrying Oil in Bulk, issued 12 August 1992 for smaller existing tankers. This manual (REC. Single-hull tanker values generally fall between 0.3 and 0.4, whereas double-hull tanker values lie between .9 and 1.1.
96) gives guidelines for a double hull oil tanker which is constructed primarily for the carriage of oil in bulk. It includes a review of survey preparation guidelines. 1 for the mid-ship section of the vessel. The case study vessel is a coastal oil tanker with a deadweight of 11,500 t and draft of 7.4 m. The tanker has a longitudinally stiffened double bottom and weather deck, while the double side-shell structure is transversely stiffened; see Fig.