January+2010+%2D+High+Speed%2C+Light+Craft+and+Naval+Surface+Craft

Main Changes in Rules for Classification of High Speed, Light Craft and Naval Surface Craft

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Pt.0 Ch.3 Plan Approval Documentation Types – Definitions
The present edition of this chapter, dated January 2010, supersedes the July 2009 edition of the same chapter.

Main changes coming into force 1 January 2010:

  • Sec.2 Documentation Types
    • Document type G060 has been amended.
    • Document type H130 and H131 has been amended.
    • A new document type H133 - Erection and inspection plan has been added.
    • New document types I240 - Hardware-in-the-loop test package documentation and I250 - Hardware-in-the-loop test package report have been added.
    • Document type M040 has been amended.
    • A new document type M061 - Welding procedure qualification record has been added.
    • Document type M080 has been amended, M082 has been deleted and for M041, M081, M083 and M084 the titles have been amended.
    • A new document discipline “Q - Quality management” has been added.
    • A new document type Z041 - Ship construction file has been added.
    • Document type Z310 has been amended.

Pt. 2 Ch.3 Fabrication and Testing of Structures
Main changes adopted January 2010. Coming into force 1 January 2010.

  • Sec.1 General Requirements
    • The terms in item B101 has been modified to comply with IACS UR Z23.
    • The requirements in Sub-section C. Documentation Requirements, have been modified.

Significant editorial changes adopted January 2010

Taking effect immediately

  • Sec.7 Non Destructive Testing of Welds

    • The last sentence in item B101 is modified.

Pt.2 Ch.4 Composite Materials
Main changes adopted January 2010. Coming into force 1 July 2010

  • Sec.2 Materials

    • Sub-section F. Adhesives: Extensive revision to define requirements for rigid and flexible adhesives and sealants and for qualification of bonding personnel.

Pt.3 Ch.4 Hull Structural Design, Fibre Composite and Sandwich Constructions
Main changes adopted January 2010. Coming into force 1 July 2010

  • Sec.3 Materials

    • A new item A202 has been added stating that adhesives used for bonded joints shall be type approved by DNV.

  • Sec.8 Bonded Joints

    • A new item A103 has been added stating that adhesives used for bonded joints shall be type approved by DNV.

Pt.3 Ch.6 Stability and Watertight Integrity, Closing Appliances
Main changes adopted January 2010. Coming into force 1 July 2010

  • Sec.1 General Requirements

    • Sub-section element G300 has been renamed “Direct glazing” and updated in regard to terminology. “Glue” has been changed to “adhesive / bonded joint and direct glazing”.

Pt.4 Ch.4 Rotating Machinery, Power Transmission
Main changes adopted January 2010. Coming into force 1 July 2010

  • Sec.1 Shafting
    • In Table C1, First line (i.e. Shafts for propulsion when torque > 100 kNm); fifth column (Ultrasonic testing): is changed from:“W” to “NV*”.

    • In Table C1 a table footnote is added to the “NV*”, saying: “* Can be relaxed to “W” if IACS Recommendation 68 is used as basis for the UT.”

Pt.4 Ch.8 Electrical Installations
Main changes coming into force 1 July 2010

  • Sec.1 Service Description

    • Table B1: Requirement for “Schedule of batteries” as part of the new system information is deleted.

  • Sec.2 System Design
    • A105 b): Added “intrinsically safe circuits”
    • C302 b): Following clarification added: “If overcurrent protection release is integrated in the circuit breaker, the setting of this release shall be set at its maximum value”.
    • F401: Requirement to duplicated supply to navigation equipment deleted.
    • F500: Rules for power supply to internal communication have been deleted. Requirements to power supply to internal communication systems is covered by flag state rules and IMO.

    • I201: The requirement for installation of pipes above switchboards has been rewritten.

  • Sec.3 Equipment in General
    • D302: Requirement to cable entrance clarified.

    • D401: Clarification that hinged doors only need earthing when equipped with electric components with voltage exceeding 50 V.

  • Sec.4 Switchgear and Control gear Assemblies

    • A103: Guidance note clarifying that connections of conductors etc. need maintenance is deleted.

  • Sec.10 Installations
    • Table B1: The required IP rating of control desks in dry control rooms may be relaxed.
    • Table B1: IP grade required for instrumentation components in dry control rooms and switchboard rooms is changed from IP 22 to IP20.
    • C202 b): Requirement to 300 mm separation between high voltage cables and low voltage cables is deleted. New requirement in line with IACS UR E11: “High voltage cables are not to be installed on the same cable tray for the cables operating at the nominal system voltage of 1 kV and less.”
    • C203: Requirement to segregation of power and control cables deleted.
    • C505 d): Requirement to cable support close to entry through cable gland is deleted.
    • C603 d): Requirement to fixing of cables pulled in pipes is reworded.

    • C703: Requirement to wall thickness of cable pipes deleted.

  • Sec.11 Hazardous Areas Installations
    • Table B1: The requirements for documentation of Is-circuit limits and values are clarified.
    • D200: The Sub-section element is renamed “Cable types”.
    • D201: Wording of a) and b) is aligned with IEC 60092-502 clause 7.4. Part c) to f) are moved to D202.
    • D202: A new paragraph named “Fixed cable installation” contains parts c) to f) of the previous D201.

    • D207: The paragraph is renumbered from the previous D206. Part a) is moved to D201. Requirements to earthing of braiding and screens in Is circuits are aligned with IEC 60092-502.

Pt.5 Ch.1 Ships for Navigation in Ice
Significant editorial changes adopted January 2010. Taking effect immediately

  • Sec.4 Non Destructive Testing of Welds

    • In the second paragraph in item J404, the text “CTE or 2/3CLE” has been corrected to “2/3CTE or 2/3CLE”.

  • Sec.8 IACS Unified Requirements For Polar Ships (Tentative Rules)
    • In item C602 the formula for net web thickness has been corrected.

    • In Sub-section E the ice force calculation formulas for appendages have been withdrawn. Assessment of the loads will be done on a case by case basis until new formulas are published.

Main changes coming into force 1 January 2010

  • Sec.2 Basic Ice Strengthening

    • Sub-section element C200 “Design of propeller and propeller shaft” has been amended as a consequence of changes to Sec.3.

  • Sec.3 Ice Strengthening for Northern Baltic
    • Sub-section element A400 “Documentation requirements” has been amended.

    • New design loads for propeller and shafting have been introduced and Sub-section J “Propulsion Machinery” has been completely revised.

  • Sec.4 Vessels for Arctic and Ice Breaking Service

    • Item A401 has been amended as a consequence of changes to Sec.2 and Sec.3.

  • Sec.6 Winterization

    • Item C402 has been amended giving an opening to use the damage extent description from MSC/Circ. 1056.

  • App.A Guidelines for Strength Analysis of the Propeller Blade using Finite Element Method

    • This new guideline has been introduced as a consequence of the above changes.

Pt.5 Ch.4 Crew Boats
Main changes adopted January 2010. Coming into force 1 July 2010

  • Sec.4 Machinery and Systems

    • Item C103 has been updated regarding capacity requirements to the emergency source of electrical power. In addition the consumer list has been updated (based on requirements in other sections).

Pt.5 Ch.5 Yachts
Main changes adopted January 2010. Coming into force 1 July 2010

  • Sec.4 Machinery and Systems

    • A new Sub-section D “Electrical Systems” has been added. The new Sub-section contains requirements to the emergency source of electrical power, both capacity and requirements to the services supplied.

Pt.5 Ch.6 Patrol Boats
Main changes adopted January 2010. Coming into force 1 July 2010

  • Sec.4 Machinery and Systems

    • A new Sub-section C - Electrical Systems has been added. The sub-section contains requirements for the emergency source of electrical power, capacity and the services to be supplied.

Main changes coming into force 1 July 2010

  • Sec.5 Fire Safety
    • The previous sub-section 4 C - Fire Safety has been deleted and replaced by a new Sec.5 - Fire Safety. The safety level will however remain unchanged. Previous Sec.5 is renumbered Sec.6.

    • Clarifications have been made with regard to requirements for structural fire protection, escape ways, detection, extinguishing system and ventilation, making the rule-text more in line with how the rules have been applied for the past years.

Pt.6 Ch.13 Gas Fuelled Engine Installations
Main changes coming into force 1 July 2010

  • General

    • Interim Guidelines on Safety for Natural Gas-fuelled Engine Installations in Ships have been approved by IMO MSC.285(86) in June 2009. The Rules are aligned with these guidelines.

  • Sec.1 General Requirements
    • A documentation requirement for an overall design philosophy is added.
    • Documentation requirements changed to new format.
    • Some definitions updated in line with Interim Guidelines, changes later in document or general improvement.

    • The product certification requirements for valves are updated to be stricter and in line with Rules for Classification of Ships, Pt.5 Ch.5 for low temperature gas or high pressure gas.

  • Sec.2 Materials

    • Some material requirements are updated to better accommodate materials for CNG tanks, and to make the requirements less strict for low pressure and piping with working temperature above zero.

  • Sec.3 Arrangement and System Design
    • The requirements with regard to entrance to and location of compressor rooms are changed to be in line with Interim Guidelines. Compressor rooms can now be accepted below open deck if arranged as tank rooms, and with entrance directly from open deck or through air locks.
    • D100 General has got new content, and now contains a new requirement to give a better overall control with the design of redundant fuel supply and machinery installations due to shut down actions after gas leakages. The previous D100 General is moved to D200 and renamed Engine room configuration options.
    • A new sub-section “E Gas Supply System General” is added, collecting requirements from Sec.3 and Sec.6 regarding fuel supply system arrangement.
    • The requirement for excess flow shut down in Sec.6 D is re-written for better clarity and to make the different alternative solutions clearer, and moved to Sec.3 together with the rest of D101 to D106.
    • The design requirement for pipe duct is slightly revised to allow for an alternative calculation method for design pressure.
    • New requirements for emptying, inerting and gas freeing of gas tanks added in line with Interim Guidelines.
    • The wording for location of tanks is changed from “above” and “below deck” to “on open deck” and “in enclosed spaces”.
    • The requirement for location of tanks on open deck away from ship side is updated to be in line with the requirements for tanks located in enclosed spaces, hence opening for a location closer to the ship side for some ship types. Left out by mistake in previous revisions.
    • The requirements for location of CNG tanks and other gas tanks with pressure above 10 bar in enclosed spaces are updated in line with the Interim Guidelines. Now CNG can be located in enclosed spaces on certain conditions outlined in the rules.
    • The tank room arrangement requirement is slightly updated better accommodate the arrangement with a tank room arranged as a “cold box” welded to the outer shell of a double tank. In line with Interim Guidelines.
    • The bunkering station requirements are updated to better include CNG systems in addition to LNG systems, in line with Interim Guidelines.
    • The ventilation requirement for tank room is modified to allow for other alternative means for explosion prevention as an alternative to ventilation, in line with Interim Guidelines.
    • The ventilation requirement for ESD protected engine rooms is modified to allow for a lower rate in normal operation, in line with already enforced practice, and with Interim Guidelines.
    • Redundancy requirement for ventilation of pump and compressor room is added, in line with Interim Guidelines.
    • A new requirement containing safety requirements for spaces containing nitrogen generators or storage tanks is added. This is in line with similar requirements for chemical carriers and supply ships where nitrogen installations are common.

    • We have rearranged some of the requirements, by adding a new Sub-section, and moving requirements from Sec.3 G and Sec.6 D for better clarity of the rules.

  • Sec.4 Fire Safety

    • Some updates are done to bring the rules in line with similar requirements in the Interim Guidelines. Some requirements are moved to Sec.6.

  • Sec.5 Electrical Systems

    • Some updates are done to align with similar requirements in the Interim Guidelines. The main reason for these updates is to better include also CNG tank systems.

  • Sec.6 Control, Monitoring and Safety Systems
    • Some minor changes are done to align with the Interim Guidelines.
    • Some requirements are moved to Sec.3, and some are moved from Sec.3 and 4 to this section. Figures 1 and 2 are moved to Sec.3 and Table D1 is moved to B3.

    • The structure of the section is improved.

Pt.7 Ch.1 Survey Requirements
Significant editorial changes adopted January 2010. Taking effect immediately

  • Sec.4 Renewal Surveys Extent – Main Class

    • Table D1 is amended; requirements for survey - Steering, has been removed and the definition of “evaporator” is clarified.

  • Sec.5 Miscellaneous Main Class Surveys
    • Items A302, B101 and B102 have been aligned with IACS UR Z3. Measurement of bearing clearance shall be performed on both oil and water lubricated stem tube bearings.
    • In item D104 requirements for oil sampling has been removed.

    • Item D106 has been amended.

  • Sec.7 Alternative Survey Arrangements
    • In item C302 requirements for performance analysis has been removed.
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