Section 3 Corrosion Resistant Steels
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules for the Manufacture, Testing and Certification of Materials, July 2022 - Chapter 15 Corrosion Prevention - Section 3 Corrosion Resistant Steels

Section 3 Corrosion Resistant Steels

3.1 Performance standard and definition

3.1.1 IMO Resolution MSC.289(87) – Performance Standard for Alternative Means of Corrosion Protection for Cargo Oil Tanks of Crude Oil Tankers – (Adopted on 14 May 2010) defines minimum standards for the means of corrosion protection by the use of approved corrosion resistant steel in cargo oil tanks during the construction of crude oil tankers.

3.1.2 Corrosion resistant steel is steel whose corrosion resistance performance in the bottom or top of the internal cargo oil tank is tested and approved to satisfy the requirements in the IMO Performance Standard in addition to other relevant requirements for ship steel, structure strength and construction.

3.2 Corrosion resistant steel approval

3.2.1 The compliance of the corrosion resistant steel with the IMO Performance Standard shall be confirmed on the steel manufacturer’s Approval certificate. The full approval procedure for corrosion resistant steel manufacturers and for the steel products involved is contained in MQPS Book C, Procedure 3-3.

3.2.2 The compliance of the vessel with IMO Performance Standard is indicated by the acceptance of the Technical File (TF) by the Flag State or their Recognised Organisation (RO), the issue of the vessel’s SOLAS certificate and, if requested, the assignment of the appropriate notations by the Class Society. The TF must be kept on board and maintained throughout the life of the vessel.

3.2.3 The TF shall record all of the data required by IMO Performance Standard, including a copy of the Works Approval Certificate, technical data (approved welding methods, welding consumables and repair procedures) and records of the application, including the applied actual space and area of each compartment and the applied product and its thickness.

3.3 Certification


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