Pt.0 Ch.3 Plan Approval Documentation Types – Definitions

This is a new booklet describing documentation requirements related to plan approval.

Pt.0 Ch.6 IMO High Speed Craft Code

(Previous Pt.0 Ch.3 – IMO High Speed Craft Code, has been re-indexed as new Pt.0 Ch.6)

Pt.2 Ch.3 Fabrication and Testing of Structures

Taking effect immediately

· Sec.8 Structural and Tightness Testing

— Under B301, the minimum test pressure specified in Table B1 for tanks containing liquids has been reduced for FRP tanks.

— In Table B1, tablenote 2) has been amended to align the requirement to structural testing of subsequent vessels with other IACS members.

Pt.4 Ch.4 Rotating Machinery, Power Transmission

Main changes coming into force 1 January 2009

· Sec.1 Shafting

— Items A301 and A401 have been amended to include the position and way of electrical grounding in the submitted documentation as a general requirement, and not only a requirement in case of additional class notation TMON.

— Item B208 has been modified. To avoid misunderstanding, it has been clarified that the shaft diameter calculated by simplified diameter formula is just an absolute minimum diameter, and that torsional vibration stresses of an actual shafting arrangement has to be considered, i.e. a clean-up of when to use the one or the other has been made.

— In item B306, the Guidance note has been expanded in order to better explain what is meant by ream fitted bolts, with some practical hints how to facilitate easier removal of bolts without damaging bolt holes.

— In item B402, formula for calculating necessary pull-up force for conical connections has been included.

— In item F105, a new requirement has been introduced for installation of rope guard on all vessels in order to protect the stern tube seal from damage and consequently oil leakage from the stern tube.

In addition, a requirement for net/line cutter has been introduced for vessels that are more exposed to waters with ghost lines and nets such as fishing vessels, ferries, tugs etc.

· Sec.5 Torsionally Elastic Couplings

— Item B207 has been amended in relation to shear stresses due to centrifugal action for elastic couplings of high speeds.

Pt.4 Ch.5 Rotating Machinery, Driven Units

Taking effect immediately

· Sec.4 Compressors

— A new item B108 dealing with compressors for instrument- and control air receivers has been added.