Pt.2 Ch.1 General Requirements for Materials
Main changes coming into force 1 January 2008
Sec.2 Testing Procedures
This section has been revised to incorporate changes in the amended IACS UR W2 and to improve user-friendliness.
Sub-section element B100 has been amended with respect to the use of alternative tensile test pieces. Amendments are mainly editorial.
Sub-section element B300 has been editorially amended to clarify the procedure for impact testing. The requirement for subsize test pieces with width 2.5 mm has been deleted.
Pt.2 Ch.2 Metallic Materials
Main changes coming into force 1 January 2008
Section 1 – Rolled Steel for Structural Application
This section has been completely rewritten and restructured. Changes in IACS UR W11 (hull steels) have been incorporated. Lessons learned from quality incidents with cracked and brittle hull steel plates have also been incorporated, see A305, A404, A501, A507 with cracked and brittle hull steel plates.
Section 6 – Bars for Chain Cables
This section has been completely rewritten and restructured. Changes in IACS UR W18 (chain cables) have been incorporated.
Section 9 – Aluminium Alloys
Changes in IACS UR W25 (aluminium alloys) have been incorporated. Most importantly, requirements for corrosion testing have been added.
Pt.4 Ch.3 Rotating Machinery, Drivers
Changes entering into force with immediate effect
Sec.1 Diesel Engines
Item E202 has been has been replaced by:
202 When electronic speed governors of propulsion engines form part of a remote control system, they shall comply with Ch.1 Sec.4 A400 (rules for ships) and Ch.9.
Electronic speed governors and their actuators shall be type tested according to Standard for Certification No. 2.4.
Item E303 has been amended to:
303 The overspeed protective device shall be adjusted to ensure that the engine speed cannot exceed the maximum permissible speed as determined by the design, but not beyond 120% rated speed except for diesel engines driving generators where 115% of rated speed applies.
(IACS UR M3.1.2 and M3.2.5)
Pt.4 Ch.8 Electrical Installations
This chapter was substantially revised in January 2007. However, in view of a need to undertake a number of editorial improvements, mainly as a consequence of changes to common requirements in the DNV Offshore Standard DNV-OS-D201 “Electrical Installations”, this booklet has been re-printed.
Pt.5 Ch.14 Naval ad Naval Support Vessels
Main changes coming into force 1 January 2008
General
Experience with verification of shock resistance of equipment and foundations for naval craft have shown that shock requirements should not be a mandatory requirement for all naval craft. This is so because shock is a "performance requirement" set by the owner, not a minimum safety requirement, and the rules do not specify any minimum limits.
Sec.4 Structural Strength
Shock requirements for equipment foundations have been removed.
Sec.6 Piping Systems
Shock requirements for equipment have been removed.
Changes in requirements for sea water cooling system. Removal of requirements covering temporary jumper connections and arrangement of fire main as a ring main line.
Sec.7 Machinery, Propulsion and Positioning
Shock requirements for equipment have been removed.
Sec.8 Electric Power Generation and Transfer
Shock requirements for equipment have been removed.
Sec.9 Control and Monitoring
Shock requirements for equipment have been removed.
Sec.10 Fire Safety
Shock requirements for equipment have been removed.
Introducing requirements covering horizontal fire boundaries.
Sec.15 Storage Rooms of Explosives
Requirements for blast routes for explosions have been removed.