005_SMV2006_RCN08_2008-01.pdf

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 1

RULES FOR BUILDING AND CLASSING

STEEL VESSELS UNDER 90 METERS (295 FEET)

IN LENGTH

NOTICE NO. 8 – January 2008

The following Rule Changes were approved by the ABS Rules Committee on 7 June 2007 and become EFFECTIVE AS OF 1 JANUARY 2008.

(See http://www.eagle.org/absdownloads/index.cfm for the consolidated version of the Rules for Building and Classing Steel Vessels Under 90 meters (295 feet) in Length 2006, with all Notices and Corrigenda incorporated.)

Notes - The date in the parentheses means the date that the Rule becomes effective for new construction based on the contract date for construction, unless otherwise noted. (See 1-1-4/3.3 of the ABS Rules for Conditions of Classification (Part 1).)

Note Regarding the Changes to Part 1

For the 2008 edition, Part 1, “Conditions of Classification” was consolidated into a generic booklet, entitled Rules for Conditions of Classification (Part 1) for all vessels other than those in offshore service. The purpose of this consolidation was to emphasize the common applicability of the classification requirements in “Part 1” to ABS-classed vessels, other marine structures and their associated machinery, and thereby make “Conditions of Classification” more readily a common Rule of the various ABS Rules and Guides, as appropriate. As a result of this consolidation, those Sections of Part 1 which are now included in the generic booklet are deleted or revised as follows.

(Add new Foreword to Part 1, as follows.)

Foreword (1 January 2008)

For the 2008 edition, Part 1, “Conditions of Classification” was consolidated into a generic booklet, entitled Rules for Conditions of Classification (Part 1) for all vessels other than those in offshore service. The purpose of this consolidation was to emphasize the common applicability of the classification requirements in “Part 1” to ABS-classed vessels, other marine structures and their associated machinery, and thereby make “Conditions of Classification” more readily a common Rule of the various ABS Rules and Guides, as appropriate.

Notice No. 8 – January 2008

2 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

PART 1 CONDITIONS OF CLASSIFICATION

CHAPTER 1 SCOPE AND CONDITIONS OF CLASSIFICATION

SECTION 1 CLASSIFICATION (1 January 2008)

(Delete entire existing text of Section 1-1-1 and replace with the following:)

The requirements for conditions of classification are contained in the separate, generic ABS Rules for Conditions of Classification (Part 1).

Additional requirements specific to steel vessels under 90 meters (295 feet) in length are contained in the following Sections of this Part.

(Delete entire existing Section 1-1-2.)

CHAPTER 1 SCOPE AND CONDITIONS OF CLASSIFICATION

SECTION 2 CLASSIFICATION SYMBOLS AND NOTATIONS (1 January 2008)

(Delete entire existing text of Section 1-1-2 and replace with the following:)

A listing of Classification Symbols and Notations available to the Owners of vessels, offshore drilling and production units and other marine structures and systems, “List of ABS Notations and Symbols” is available from the ABS website “http://www.eagle.org/absdownloads/index.cfm”.

SECTION 3 RULES FOR CLASSIFICATION (1 January 2008)

(Renumber Section 1-1-4 as Section 1-1-3. Delete Subsections 1-1-3/3 through 1-1-3/7.)

(Delete entire existing Sections 1-1-5 and 1-1-6.)

SECTION 4 SUBMISSION OF PLANS

(Renumber Section 1-1-7 as Section 1-1-4.)

(Delete entire existing Sections 1-1-8 through 1-1-14 and Appendix 1.)

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 3

PART 3 HULL CONSTRUCTION AND EQUIPMENT

CHAPTER 2 HULL STRUCTURES AND ARRANGEMENTS

SECTION 11 RUDDERS

15 Pintles

(Delete 3-2-11/Table 1 and revise first sentence of Paragraph 3-2-11/15.3, as follows.

Text of 3-2-11/15.1 remains unchanged.)

15.1 General

Pintles are to be fitted in the gudgeons as taper bolts without a shoulder. They are to extend for the full depth of the gudgeon and are to have a bearing length between 1.0 and 1.2 times the required pintle diameter. The taper on the diameter is to be:

1/8 to 1/12 for keyed and other manually assembled pintles applying locking by locking nut.

1/12 to 1/20 for pintle mounted with oil injection and hydraulic nut.

15.3 Diameter (2008)

The diameter of the pintles is not to be less than that obtained from the following equation.

dp = k1 pBK where k1 = 11.1 (34.7, 1.38)

B = bearing force, in kN (tf, Ltf), to be obtained from 3-2-11/15.5

Kp = material factor for the pintle, as defined in 3-2-11/1.3

VR = as defined in 3-2-11/3

A = total projected area of the rudder, in m2 (ft2)

4 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

PART 4 VESSEL SYSTEMS AND MACHINERY

CHAPTER 1 GENERAL

SECTION 1 CONDITIONS OF CLASSIFICATION OF MACHINERY

7 Machinery Plans and Data

(Add new note in Paragraph 4-1-1/7.19, as follows.)

7.19 Shafting (2008)

Detailed plans with material specifications of the propulsion shafting, couplings, coupling bolts*, propulsion shafting arrangement, tailshaft bearings and lubrication system, if oil-lubricated

Calculations for flexible couplings and demountable couplings (see 4-2-1/17 and 4-3-1/19.7)

Shaft alignment and vibration calculations, if required by 4-3-1/21

Detailed preloading and stress calculations and fitting instructions for non-fitted coupling bolts (see 4-3-1/19.3)

* Note: Specific details regarding the interference fit of the coupling bolts are to be submitted. In addition, calculations and detail design basis for the sizing of the fitted bolts are to be submitted if the sizing of the bolts as per 4-3-1/19.1 of the Rules is not based on as-built line shaft diameter “D”.

(Add new Subsection 4-1-1/39, as follows.)

39 Ambient Temperature (2008)

For vessels of unrestricted service, ambient temperature, as indicated in 4-1-1/Table 2, is to be considered in the selection and installation of machinery, equipment and appliances. For vessels of restricted or special service, the ambient temperature appropriate to the special nature is to be considered.

(Add new table 4-1-1/Table 2, as follows.)

TABLE 2

Ambient Temperatures for Unrestricted Service (2008)

Location Range of Temperature Enclosed spaces (1, 2) 0 to 45°C Air

Open deck (1) –25 to 45°C

Temperature Seawater 32°C

Notes:

1 Electronic equipment is to be suitable for operations even with an air temperature of 55°C. See also 4-6-1/17.3.

For automatic or remote control and monitoring systems required to meet 4-7-2/Table 1 or 4-9-7/Table 9 of the Steel Vessel Rules, see test 3 of 4-7-2/Table 1, or test 3 of 4-9-7/Table 9 of the Steel Vessel Rules.

2 Electrical equipment in machinery spaces is to be designed for 45°C, except that electric generators and motors are to be designed for 50°C. Electrical equipment outside machinery space may be designed for 40°C.

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 5

CHAPTER 3 PROPULSION AND MANEUVERING MACHINERY

SECTION 1 PROPULSION SHAFTING

5 Materials and Testing

(Revise Paragraph 4-3-1/5.7, as follows.)

5.7 Weldability (2008)

Steel used for tail shafts is to have carbon content in accordance with 2-3-7/1.1.2 of the ABS Rules for Materials and Welding (Part 2).

19 Solid Couplings

(Revise Paragraph 4-3-1/19.1, as follows.)

19.1 Fitted Bolts (2008)

The minimum diameter of fitted shaft coupling bolts is to be determined by the following equation.

db = 0.65 bNBUcUD /)(3 + mm (in.)

where db = diameter of bolts at joints, in mm (in.)

D = minimum required shaft diameter designed considering the largest combined torque (static and dynamic), acting at the shaft in vicinity of the respective coupling flanges; mm (in), see 4-3-1/21, but not less than the minimum required line shaft diameter, as per 4-3-1/7, in mm (in.)

U = minimum specific tensile strength of shaft material, in N/mm2, (kgf/mm2, psi) c = 160 (16.3, 23180)

N = number of bolts fitted in one coupling

B = bolt circle diameter, in mm (in.)

Ub = minimum specific tensile strength of bolt material, in N/mm2, (kgf/mm2, psi). To be not less than U. Ub, is to be taken not more than 1.7U or 1000 N/mm2 (102 kgf/mm2, 145,000 psi), whichever is less, for calculation purposes.

Notes: (2008) 1 The bolts are to be assembled with an interference fit.

2 The use of other materials will be subject to special consideration based on submitted engineering analyses.

6 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

CHAPTER 3 PROPULSION AND MANEUVERING MACHINERY

SECTION 3 STEERING GEAR

15 Testing and Trials

15.1 Testing of Piping System

(Revise Subparagraph 4-3-3/15.1.1, as follows.)

15.1.1 Shop Tests (2008)

After fabrication, each component of the steering gear piping system, including the power units, hydraulic cylinders and piping, is to be hydrostatically tested at the plant of manufacture to

1.5 times the relief valve setting.

CHAPTER 4 PUMPS AND PIPING SYSTEMS

SECTION 1 GENERAL

1 Construction and Installation

(Revise last paragraph of Paragraph 4-4-1/1.3, as follows.)

1.3 Piping Groups (2008)

To distinguish between detail requirements for the various systems, the piping on shipboard is divided into two groups.

Group I, in general, includes all piping intended for working pressures or temperatures in various services, as follows:

Service Pressure bar (kgf/cm2, psi) Temperature °C (°F) Vapor and Gas over 10.3 (10.5, 150) over 343 (650) Water over 15.5 (15.8, 225) over 177 (350) Lubricating Oil over 15.5 (15.8, 225) over 204 (400) Fuel Oil over 10.3 (10.5, 150) over 66 (150) Hydraulic Fluid over 15.5 (15.8, 225) over 204 (400)

Group II includes all piping intended for working pressures and temperatures below those stipulated under Group I. Group II also includes cargo-oil and tank cleaning piping in cargo area on oil carriers, and open-ended lines such as drains, overflows, engine exhausts, boiler escape pipes, and vents, regardless of the working pressures or temperatures.

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 7

CHAPTER 4 PUMPS AND PIPING SYSTEMS

SECTION 3 BILGE AND BALLAST SYSTEMS AND TANKS

9 Vent Pipes

9.9 Vent Outlets

(Add new Subparagraph 4-4-3/9.9.3, as follows.)

9.9.3 Vent Outlet Closing Devices (2008)

9.9.3(a) General. Where vent outlets required by 4-4-3/9.9.2 are to be fitted with automatic closing devices, they are to comply with the following:

9.9.3(b) Design.

i) Vent outlet automatic closing devices are to be so designed that they will withstand both ambient and working conditions, and be suitable for use at inclinations up to and including ±40°.

ii) Vent outlet automatic closing devices are to be constructed to allow inspection of the closure and the inside of the casing as well as changing the seals.

iii) Efficient ball or float seating arrangements are to be provided for the closures. Bars, cage or other devices are to be provided to prevent the ball or float from contacting the inner chamber in its normal state and made in such a way that the ball or float is not damaged when subjected to water impact due to a tank being overfilled.

iv) Vent outlet automatic closing devices are to be self-draining.

v) The clear area through a vent outlet closing device in the open position is to be at least equal to the area of the inlet.

vi) An automatic closing device is to:

• Prevent the free entry of water into the tanks,

• Allow the passage of air or liquid to prevent excessive pressure or vacuum developing in the tank.

vii) In the case of vent outlet closing devices of the float type, suitable guides are to be provided to ensure unobstructed operation under all working conditions of heel and trim.

viii) The maximum allowable tolerances for wall thickness of floats should not exceed ±10%of thickness.

ix) The inner and outer chambers of an automatic air pipe head is to be of a minimum thickness of 6 mm (0.24 inch).

9.9.3(c) Materials.

i) Casings of vent outlet closing devices are to be of approved metallic materials adequately protected against corrosion.

ii) For galvanized steel air pipe heads, the zinc coating is to be applied by the hot method and the thickness is to be 70 to 100 micrometers (2.776 to 3.937 mil).

8 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

iii) For areas of the head susceptible to erosion (e.g., those parts directly subjected to ballast water impact when the tank is being pressed up, for example the inner chamber area above the air pipe, plus an overlap of 10° or more to either side) an additional harder coating should be applied. This is to be an aluminum bearing epoxy, or other equivalent coating, applied over the zinc.

iv) Closures and seats made of non-metallic materials are to be compatible with the media intended to be carried in the tank and to seawater, and suitable for operating at ambient temperatures between -25°C and 85°C (-13°F and 185°F).

9.9.3(d) Type Testing.

i) Testing of Vent Outlet Automatic Closing Devices. Each type and size of vent outlet automatic closing device is to be surveyed and type tested at the manufacturer's works or other acceptable location.

The minimum test requirements for a vent outlet automatic closing device are to include the determination of the flow characteristics of the vent outlet closing device, the measurement of the pressure drop versus the rate of volume flow using water and with any intended flame or insect screens in place and also tightness tests during immersion/emerging in water, whereby the automatic closing device is to be subjected to a series of tightness tests involving not less than two (2) immersion cycles under each of the following conditions:

• The automatic closing device is to be submerged slightly below the water surface at a velocity of approximately 4 m/min. (12.19 ft/min) and then returned to the original position immediately. The quantity of leakage is to be recorded.

• The automatic closing device is to be submerged to a point slightly below the surface of the water. The submerging velocity is to be approximately 8 m/min and the air pipe vent head is to remain submerged for not less than 5 minutes. The quantity of leakage is to be recorded.

• Each of the above tightness tests are to be carried out in the normal position as well as at an inclination of 40 degrees.

The maximum allowable leakage per cycle is not to exceed 2 ml/mm (13.42 × 10-2 gal/inch) of nominal diameter of inlet pipe during any individual test.

ii) Testing of Non-Metallic Floats. Impact and compression loading tests are to be carried out on the floats before and after pre-conditioning as follows:

Test Temperature °C (°F): –25°C (–13°F) 20°C (68°F) 85°C (185°F)

Test Conditions Dry Yes Yes Yes After immersing in water Yes Yes Yes After immersing in fuel oil NA Yes NA

Immersing in water and fuel oil is to be for at least 48 hours.

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 9

a) Impact Test. The test may be conducted on a pendulum type testing machine.

The floats are to be subjected to 5 impacts of 2.5 N-m (1.844 lbf-ft) each and are not to suffer permanent deformation, cracking or surface deterioration at this impact loading.

Subsequently the floats are to be subjected to 5 impacts of 25 N-m (18.44 lbf-ft) each. At this impact energy level some localized surface damage at the impact point may occur. No permanent deformation or cracking of the floats is to appear.

b) Compression Loading Test. Compression tests are to be conducted with the floats mounted on a supporting ring of a diameter and bearing area corresponding to those of the float seating with which it is intended that float shall be used.

For ball type float, loads are to be applied through a concave cap of the same internal radius as the test float and bearing on an area of the same diameter as the seating. For a disc type float, loads are to be applied through a disc of equal diameter as the float.

A load of 350 kg (771.62 lb) is to be applied over one minute and maintained for 60 minutes. The deflection is to be measured at intervals of 10 minutes after attachment of the full load.

The record of deflection against time is to show no continuing increase in deflection and, after release of the load, there is to be no permanent deflection.

iii) Testing of Metallic Floats. The above described impact tests are to be carried out at room temperature and in the dry condition.

CHAPTER 4 PUMPS AND PIPING SYSTEMS

SECTION 8 OTHER PIPING SYSTEMS AND TANKS

1 Fixed Oxygen-Acetylene Installations (2003)

1.3 Gas Storage

(Revise Subparagraph 4-4-8/1.3.3, as follows.)

1.3.3 Electrical Installation in Storage Room (2008)

Electrical equipment installed within the storage room, including the ventilation fan motor, is to be of a certified safe type. Electrical equipment installed within the storage room may be any of the types indicated in 4-6-3/11.1.1 and is to be IEC Publication 60079 group IIC class T2.

10 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

3 Fuel Storage and Refueling Systems for Helicopter Facilities

3.3 Fuels with Flash Point at or Below 60°C (140°F) – Installations on an Open Deck (Revise Subparagraph 4-4-8/3.3.6, as follows.)

3.3.6 Electrical Equipment (2008)

All electrical equipment installed within 3 meters (10 ft) of either the tank vent outlet or the pumping/refueling equipment is to be of a certified safe type. Electrical equipment installed may be any of the types indicated in 4-6-3/11.1.1 and is to be IEC Publication 60079 group IIA class T3.

3.5 Fuels with Flash Points at or Below 60°C (140°F) – Installation within Enclosed Spaces

(Revise Subparagraph 4-4-8/3.5.4, as follows.)

3.5.4 Electrical Equipment (2008)

Electrical equipment installed in the refueling pump room and the space in which an independent helicopter fuel tank storage is located is to be of a certified safe type. All electrical equipment installed within three (3) meters (10 ft) of the tank vent outlet is to be of a certified safe type.

Electrical equipment installed may be any of the types indicated in 4-6-3/11.1.1 and is to be IEC Publication 60079 group IIA class T3.

CHAPTER 6 ELECTRICAL INSTALLATIONS

SECTION 1 GENERAL

(Revise Subsection 4-6-1/9, as follows.)

9 Voltage and Frequency Variations (2008)

Electrical appliances supplied from the main or emergency systems, are to be so designed and manufactured that they are capable of being operated satisfactorily under the normally occurring variations in voltage and frequency. Unless otherwise stated in national or international standards, the variations from the rated value may be taken from the 4-6-1/Table 1. Any special system, such as electronic circuits, which cannot operate satisfactorily within the limit shown in 4-6-1/Table 1, is not to be supplied directly from the system but by alternative means, such as through a stabilized supply.

For generators, see 4-6-4/3.17.1, 4-6-4/3.19.1, and 4-6-4/3.21.2.

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 11

(Revise 4-6-1/Table 1, as follows.)

TABLE 1

Voltage and Frequency Variations [See 4-6-1/9] (2008)

Voltage and Frequency Variations for AC Distribution Systems

Quantity in Operation Permanent Variation Transient Variation (Recovery Time)

Frequency ±5% ±10% (5 s) Voltage +6%, −10% ±20% (1.5 s)

Voltage Variations for DC Distribution Systems (such as systems supplied by DC generators or rectifiers)

Parameters Variations Voltage tolerance (continuous) ±10% Voltage cyclic variation deviation 5% Voltage ripple (AC r.m.s over steady DC voltage) 10%

Voltage Variations for Battery Systems Type of System Variations

Components connected to the battery during charging (see Note)

+30%, –25%

Components not connected to the battery during charging

+20%, –25%

Note: Different voltage variations as determined by the charging/discharging characteristics, including the ripple voltage from the charging device, may be considered.

12 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

CHAPTER 6 ELECTRICAL INSTALLATIONS

SECTION 2 SYSTEM DESIGN

5 Emergency Source of Power

5.1 General

5.1.2 Separation

(Revise Item 4-6-2/5.1.2(c) and add new 4-6-2/Figures 1 through 3, as follows.)

5.1.2(c) Alternative Arrangement (2008). The following alternative arrangements may be considered in lieu of 4-6-2/5.1.2(a):

i) Separation by a cofferdam having dimensions as required for ready access and extending at least 150 mm (6 in.) beyond the boundaries of the space containing the self-contained emergency source of power and its associated equipment as stated in 4-6-2/5.1.2(a).

See 4-6-2/Figure 1 below. Except for cables feeding services located in the machinery space, emergency electric cables are not to be installed in such cofferdams unless the cofferdam is insulated to A-60.

FIGURE 1

Cofferdam with Extension Beyond the Boundaries of the Space Containing the Emergency Source (2008)

Cofferdam

Space containing emergency source of power and its associated equipment

150 mm (6 in.)

Category A Machinery Space

ii) Separation by a cofferdam having dimensions as required for ready access between category A machinery space and the space containing the self-contained emergency source of power and its associated equipment as stated in 4-6-2/5.1.2(a) without extension beyond the boundaries. Any contiguous lines between these spaces at the corner of the cofferdam are to be insulated to A-60 for a length of 450 mm (18 in) at the category A machinery space side. See 4-6-2/Figure 2 below.

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 13

FIGURE 2

Cofferdam without Extension Beyond the Boundaries of the Space Containing the Emergency Source (2008)

Cofferdam

Space containing emergency source of power and its associated equipment

450 mm (18 in.)

A-60 insulation

iii) The contiguous boundaries insulated to A-60 with the insulation extending at least 450 mm (18 in.) beyond the boundary of the space containing the self-contained emergency source of power and its associated equipment as stated in 4-6-2/5.1.2(a).

See 4-6-2/Figure 3 below.

The arrangements indicated in 4-6-2/Figure 3 below can be considered only when it can be shown that the arrangements are in compliance with the requirements of the flag administration.

FIGURE 3

Boundary Insulated to A-60 with the Insulation Extending Beyond the Boundaries of the Space

Containing the Emergency Source (2008)

Space containing emergency source of power and its associated equipment

450 mm (18 in.)

A-60 insulation

5.5 Power Supply

(Revise Subparagraph 4-6-2/5.5.4, as follows.)

5.5.4 Emergency Generator for Non-emergency Services (2008)

Provided that suitable measures are taken for safeguarding independent emergency operation under all circumstances, the emergency generator may be used, exceptionally, and for short periods, to supply non-emergency circuits during the blackout situation (see 4-1-1/13.23) dead ship condition (see 4-1-1/13.21), and routine use for testing (see 4-6-2/5.11). The generator is to be safeguarded against overload by automatically shedding such non-emergency services so that supply to the required emergency loads is always available. See also 4-6-2/3.9.5.

For use of the emergency generator in port, see 4-6-2/5.16.

14 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

9 Circuit Protection System

9.3 Protection for Generators

(Revise Subparagraph 4-6-2/9.3.2, as follows.)

9.3.2 Trip Setting for Coordination (2008)

The instantaneous and short-time overcurrent trips of the generators are to be set at the lowest values of current and time which will coordinate with the trip settings of feeder circuit breakers. See also 4-6-2/9.1.5, 4-6-2/9.5.1, and 4-6-2/9.5.2(a).

9.5 Protection for Alternating-current (AC) Generators

(Revise Subparagraph 4-6-2/9.5.1, as follows.)

9.5.1 Short-time Delay Trip (2008)

Short-time delay trips are to be provided with circuit breakers for AC generators. See also 4-6-2/9.3.2. The current setting of the short time delay trip is to be less than the steady state short-circuit current of the generator.

For generators with a capacity of less than 200 kW having prime movers such as diesel engines or gas turbines which operate independently of the electrical system, consideration may be given to omission of short-time delay trips if instantaneous trips and long time overcurrent protection (see 4-6-2/9.3.1) are provided. When the short time delay trips are omitted, the thermal withstand capacity of the generator is to be greater than the steady state short-circuit current of the generator, until activation of the tripping system.

9.5.2 Parallel Operation

(Revise Item 4-6-2/9.5.2(a), as follows.)

9.5.2(a) Instantaneous Trip (2008). Instantaneous trips are to be installed and set in excess of the maximum short-circuit contribution of the individual generator where three or more generators are arranged for parallel operation. See also 4-6-2/9.3.2.

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 15

CHAPTER 6 ELECTRICAL INSTALLATIONS

SECTION 3 SHIPBOARD INSTALLATION

1 Plans and Data to be Submitted

(Add new Paragraph 4-6-3/1.7, as follows.)

1.7 Maintenance Schedule of Batteries (2008)

Maintenance Schedule of batteries for essential and emergency services. See 4-6-3/3.7.5.

3 Equipment Installation and Arrangement

3.7 Accumulator Batteries

3.7.2 Battery Installation and Arrangements

(Revise Item 4-6-3/3.7.2(a), as follows.)

3.7.2(a) Large Batteries (2008). Large storage batteries, those connected to a charging device with an output of more than 2 kW, are to be installed in a room assigned to the battery only, but may be installed in a deck locker if such a room is not available. No electrical equipment is to be installed in the battery rooms unless essential for the operational purposes and certified safe for battery room atmosphere. Electrical equipment installed in battery rooms may be any of the types indicated in 4-6-3/11.1.1 and is to be IEC Publication 60079 group IIC class T1.

(Add new Subparagraphs 4-6-3/3.7.5 and 4-6-3/3.7.6, as follows.)

3.7.5 Maintenance of Batteries (2008)

3.7.5(a) Maintenance Schedule of batteries. Where batteries are fitted for use for essential and emergency services, a maintenance schedule of such batteries is to be provided and maintained.

The schedule is to include all batteries used for essential and emergency services, including system batteries installed in battery rooms, battery lockers and deck boxes as well as batteries installed within vendor supplied equipment. Examples of batteries included with equipment are:

• Computer equipment and programmable logic controllers (PLC) used in computer based systems and programmable electronic systems, when used for essential or emergency services.

• Navigation equipment, such as the equipment required by SOLAS, Chapter V, Regulation 19.

The schedule is to be submitted for review and is to include at least the following information regarding the batteries.

• Type and manufacturer’s type designation.

• Voltage and ampere-hour rating.

• Location.

• Equipment and/or system(s) served.

16 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

• Maintenance/replacement cycle dates.

• Date(s) of last maintenance and/or replacement.

• For replacement batteries in storage, the date of manufacture and shelf life (See Note below) Note: Shelf life is the duration of storage under specified conditions at the end of which a battery retains the ability to give a specified performance.

3.7.5(b) Procedure of maintenance. Procedures are to be put in place to show that, where batteries are replaced, they are to be of an equivalent performance type. Details of the schedule, procedures, and the maintenance records are to be included in the ship’s safety management system and integrated into the ship’s operational maintenance routine, as appropriate, which are to be verified by the Surveyor.

3.7.6 Replacement of Batteries (2008)

Where a vented type battery (See Note 1) replaces a valve-regulated, sealed type battery (See Note 2), the requirements in 4-6-3/3.7.2 and 4-6-3/3.7.3 are to be complied with on the basis of the charging capacity.

Notes:

1 A vented battery is one in which the cells have a cover provided with an opening through which products of electrolysis and evaporation are allowed to escape freely from the cells to atmosphere.

2 A valve-regulated battery is one in which cells are closed but have an arrangement (valve) which allows the escape of gas if the internal pressure exceeds a predetermined value.

(Add new Paragraphs 4-6-3/3.29 and 4-6-3/3.31, as follows.)

3.29 Services Required to be Operable Under a Fire Condition (2008) For the purpose of 4-6-3/5.17.2, services required to be operable under a fire condition include, but not limited thereto, are the following:

i) Fire and general alarm system

ii) Fire extinguishing system including fire extinguishing medium release alarms

iii) Emergency Fire Pump

iv) Fire detection system

v) Control and power systems for all power operated fire doors and their status indicating systems

vi) Control and power systems for all power operated watertight doors and their status indicating systems

vii) Emergency lighting

viii) Public address system

ix) Remote emergency stop/shutdown arrangement for systems which may support the propagation of fire and/or explosion

x) For passenger vessels, see 5/13.7.2(b) of the ABS Guide for Building and Classing Passenger Vessels.

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 17

3.31 High Fire Risk Areas (2008)

For the purpose of 4-6-3/5.17, the examples of the high fire risk areas are the following:

i) Machinery spaces as defined by 4-1-1/13.1 and 13.3

ii) Spaces containing fuel treatment equipment and other highly flammable substances

iii) Galley and pantries containing cooking appliances

iv) Laundry containing drying equipment

v) For passenger vessels, see 5/13.7.2(c) of the ABS Guide for Building and Classing Passenger Vessels.

5 Cable Installation

5.9 Support, Fixing and Bending

5.9.3 Plastic Cable Trays and Protective Casings (2004)

(Revise Items 4-6-3/5.9.3(a) and 4-6-3/5.9.3(b); add new Item 4-6-3/5.9.3(d);

renumber existing Item 4-6-3/5.9.3(d) as 4-6-3/5.9.3(e) and revise, as follows.)

5.9.3(a) Installations (2008). Cable trays and protective casings made of plastic materials are to be supplemented by metallic fixing and straps such that, in the event of a fire, they and the cables affixed are prevented from falling and causing an injury to personnel and/or an obstruction to any escape route. See 4-6-3/5.9.1(e). Cable trays and protective casings made of plastic materials are to be flame retardant (see Appendix 4-8-4A1 of the Steel Vessel Rules).

Where plastic cable trays and protective casings are used on open deck, they are additionally to be protected against UV light by such as anti-UV coating or equivalent.

Note: “Plastic” means both thermoplastic and thermosetting plastic materials with or without reinforcement, such as PVC and fiber reinforced plastics (FRP). “Protective casing” means a closed cover in the form of a pipe or other closed ducts of non-circular shape.

5.9.3(b) Safe Working Load (2008). The load on the cable trays and protective casings is to be within the Safe Working Load (SWL). The support spacing is to be not greater than the manufacturer’s recommendation nor in excess of the spacing at the SWL test (see Appendix 4-8-4A1 of the Steel Vessel Rules). In general, the spacing is not to exceed 2 meters.

Note: The selection and spacing of cable tray and protective casing supports are to take into account:

• Dimensions of the cable trays and the protective casings;

• Mechanical and physical properties of their material;

• Mass of the cable trays/protective casings;

• Loads due to weight of cables, external forces, thrust forces and vibrations;

• Maximum accelerations to which the system may be subjected;

• Combination of loads.

5.9.3(c) Cable occupation ratio in protective casing. The sum of the total cross-sectional area of all cables on the basis of their external diameter is not to exceed 40% of the internal cross-sectional area of the protective casing. This does not apply to a single cable in a protective casing.

5.9.3(d) Hazardous areas (2008). Cable trays and protective casings passing through hazardous areas are to be electrically conductive (see Appendix 4-8-4A1 of the Steel Vessel Rules).

18 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

5.9.3(e) Type Testing (2008). Cable trays and protective casings made of plastic materials are to be type tested in accordance with Appendix 4-8-4A1 of the Steel Vessel Rules. Alternate test procedures for impact resistance test, safe working load test, flame retardant test, smoke and toxicity tests and/or resistivity test from an international or national standard may be considered instead of the test specified in Appendix 4-8-4A1 of the Steel Vessel Rules. The type test reports are to be submitted for review.

5.17 Emergency and Essential Feeders

(Revise Subparagraph 4-6-3/5.17.1, add new Subparagraph 4-6-3/5.17.2, and renumber existing 4-6-3/5.17.2 as 4-6-3/5.17.3, as follows.)

5.17.1 Location (2008)

As far as practicable, cables and wiring for emergency and essential services, including those listed in 4-6-3/3.29, are not to pass through high fire risk areas (see 4-6-3/3.31).

These cables and wiring are also to be run in such a manner as to preclude their being rendered unserviceable by heating of the bulkheads that may be caused by a fire in an adjacent space.

5.17.2 Services Necessary Under a Fire Condition (2008)

Where cables for services required to be operable under a fire condition (see 4-6-3/3.29) including their power supplies pass through high fire risk areas (see 4-6-3/3.31) other than those which they serve, they are to be so arranged that a fire in any of these areas does not affect the operation of the service in any other area. This may be achieved by any of the following measures:

5.17.2(a) Fire resistant cables in accordance with 4-6-4/13.1.3 are installed and run continuous to keep the fire integrity within the high fire risk area. See 4-6-3/Figure 2.

Cables within High Fire Risk Areas (2008)

EG ESB

DB

DB

Other area High fire risk area Other area

Electrical consumers

Fire resistant cable Flame retardant cable Connection box

5.17.2(b) At least two loops/radial distributions run as widely apart as is practicable and so arranged that in the event of damage by fire at least one of the loops/radial distributions remains operational.

5.17.2(c) Cables used in systems that are self monitoring, fail safe or duplicated with cable runs separated as widely as practicable, may be exempted.

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 19

5.17.3 Requirements by the Governmental Authority

Attention is directed to the requirements of the governmental authority of the country whose flag the vessel flies for the installation of emergency circuits required in various types of vessels.

11 Equipment and Installation in Hazardous Areas

11.1 General Considerations

(Revise Subparagraph 4-6-3/11.1.1, as follows.)

11.1.1 General (2008)

Electrical equipment and wiring are not to be installed in hazardous areas unless essential for operational purposes.

11.1.1(a) Electrical Equipment Types. Only electrical equipment of the following types, complying with IEC Publication 60079 or other recognized standards, is to be considered for installation in hazardous areas.

• Intrinsically safe type (Ex i)

• Flameproof (explosion-proof) type (Ex d)

• Increased safety type (Ex e)

• Pressurized or purged type (Ex p)

Consideration is to be given to the flammability group and the temperature class of the equipment for suitability for the intended hazardous area, see IEC Publication 60079-20.

11.1.1(b) Fans. Fans used for the ventilation of the hazardous areas are to be of non-sparking construction in accordance with 4-6-3/11.7.

20 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

CHAPTER 6 ELECTRICAL INSTALLATIONS

SECTION 4 MACHINERY AND EQUIPMENT

7 Switchboards, Distribution Boards, Controllers, etc.

7.3 Testing and Inspection

7.3.1 Applications

(Revise Item 4-6-4/7.3.1(d), as follows.)

7.3.1(d) Battery Charger Units, Uninterruptible Power System (UPS) Units, and Distribution Boards (2008). Battery charger units of 25 kW and over, uninterruptible power system (UPS) units of 50 kW and over, and distribution boards [associated with the charging or discharging of the battery system or uninterruptible power system (UPS)] are used for essential services (see 4-6-1/3.3), emergency source of power (see 4-6-2/5), and transitional source of power (see 4-6-2/5.7) are to be tested in the presence of and inspected by the Surveyor, preferably at the plant of the manufacturer. For all other battery charger units, uninterruptible power system (UPS) units, and distribution boards, the tests may be carried out by the manufacturer whose certificate of tests will be acceptable and is to be submitted upon request from the Bureau.

(Revise Paragraph 4-6-4/7.19, as follows.)

7.19 Battery Systems and Uninterruptible Power Systems (UPS) (2008) In addition to 4-6-4/7.1 to 4-6-4/7.13, as applicable, equipment for essential, emergency, and transitional sources of power services are to comply with the following requirements. Such equipment would include the battery charger unit, uninterruptible power system (UPS) unit, and the distribution boards associated with the charging or discharging of the battery system or uninterruptible power system (UPS).

7.19.1 Definitions (2008)

Uninterruptible Power System (UPS) – A combination of converters, switches and energy storage means, for example batteries, constituting a power system for maintaining continuity of load power in case of input power failure.

Off-line UPS unit – A UPS unit where under normal operation the output load is powered from the bypass line (raw mains) and only transferred to the inverter if the bypass supply fails or goes outside preset limits. This transition will invariably result in a brief (typically 2 to 10

ms) break in the load supply.

Line interactive UPS unit – An off-line UPS unit where the bypass line switch to stored energy power when the input power goes outside the preset voltage and frequency limits.

On-line UPS unit – A UPS unit where under normal operation the output load is powered from the inverter, and will therefore continue to operate without break in the event of the supply input failing or going outside preset limits.

DC UPS unit – A UPS unit where the output is in DC (direct current).

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 21

7.19.2 Battery Charging Rate (2008)

Except when a different charging rate is necessary and is specified for a particular application, the charging facilities are to be such that the completely discharged battery can be recharged to 80% capacity in not more than 10 hours. See also 4-6-4/7.19.6(c)

7.19.3 Discharge Protection (2008)

An acceptable means, such as reverse current protection, is to be provided for preventing a failed component in the battery charger unit or uninterruptible power system (UPS) unit from discharging the battery.

7.19.4 Design and Construction (2008)

7.19.4(a) Construction. Battery charger units and uninterruptible power system (UPS) units are to be constructed in accordance with the IEC 62040 Series, or an acceptable and relevant national or international standard.

7.19.4(b) Operation. The operation of the UPS is not to depend upon external services.

7.19.4(c) Type. The type of UPS unit employed, whether off-line, line interactive or on-line, is to be appropriate to the power supply requirements of the connected load equipment.

7.19.4(d) Continuity of Supply. An external bypass is to be provided to account for a failure within the uninterruptible power system (UPS). For battery charger units and DC UPS units, see 4-6-2/7.1.6(c).

7.19.4(e) Monitoring and Alarming. The battery charger unit or uninterruptible power system (UPS) unit is to be monitored and audible and visual alarm is to be given in a normally attended location for the following.

• Power supply failure (voltage and frequency) to the connected load

• Earth fault,

• Operation of battery protective device,

• When the battery is being discharged, and

• When the bypass is in operation for on-line UPS units. When changeover occurs, for battery charger units and DC UPS units required to comply with 4-6-2/7.1.6(c).

7.19.5 Location (2008)

7.19.5(a) Location. The UPS unit is to be suitably located for use in an emergency. The UPS unit is to be located as near as practical to the equipment being supplied, provided the arrangements comply with all other Rules, such as 4-6-3/3.7, 4-6-3/3.9, 4-6-3/3.11, and 4-6-3/3.13 for location of electrical equipment.

7.19.5(b) Ventilation. UPS units utilizing valve regulated sealed batteries may be located in compartments with normal electrical equipment, provided the ventilation arrangements are in accordance with the requirements of 4-6-3/3.7. Since valve regulated sealed batteries are considered low-hydrogen-emission batteries, calculations are to be submitted in accordance with 4-6-3/3.7.2(d) to establish the gas emission performance of the valve regulated batteries compared to the standard lead acid batteries. Arrangements are to be provided to allow any possible gas emission to be led to the weather, unless the gas emission performance of the valve regulated batteries does not exceed that of standard lead acid batteries connected to a charging device of 0.2 kW.

7.19.5(c) Battery Installation. For battery installation arrangements, see 4-6-3/3.7.

22 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

7.19.6 Performance (2008)

7.19.6(a) Duration. The output power is to be maintained for the duration required for the connected equipment as stated in 4-6-2/5.3 for emergency services and 4-6-2/5.7 of transitional source of power, as applicable.

7.19.6(b) Battery Capacity. No additional circuits are to be connected to the battery charger unit or UPS unit without verification that the batteries have adequate capacity. The battery capacity is, at all times, to be capable of supplying the designated loads for the time specified in 4-6-4/7.19.6(a).

7.19.6(c) Recharging. On restoration of the input power, the rating of the charging facilities are to be sufficient to recharge the batteries while maintaining the output supply to the load equipment. See also 4-6-4/7.19.2.

7.19.7 Testing and Survey (2008)

7.19.7(a) Surveys. Equipment units are to be surveyed during manufacturing and testing in accordance with 4-6-4/7.3.1.

7.19.7(b) Testing. Appropriate testing is to be carried out to demonstrate that the battery charger units and uninterruptible power system (UPS) units are suitable for the intended environment. This is expected to include as a minimum the following tests:

• Functionality, including operation of alarms;

• Temperature rise;

• Ventilation rate;

• Battery capacity

7.19.7(c) Test upon power input failure. Where the supply is to be maintained without a break following a power input failure, this is to be verified after installation by practical test.

13 Cables and Wires

13.1 Cable Construction

(Revise Subparagraph 4-6-4/13.1.1, as follows.)

13.1.1 General (2008)

Electric cables are to have conductors, insulation and moisture-resistant jackets, in accordance with IEC Publication 60092-350, 60092-351, 60092-352, 60092-353, 60092-354, 60092-359, 60092-373, 60092-374, 60092-375, 60092-376, or IEEE Std. 45. Other recognized marine standards will also be considered. The tests may be carried out by the manufacturer whose certificate of tests will be acceptable and is to be submitted upon request from the Bureau.

Network cables are to comply with a recognized industry standard. Conductors are to be of copper and stranded in all sizes. Conductors are not to be less than the following in cross sectional size:

• 1.0 mm2 (1,973.5 circ. mils) for power and lighting,

• 0.5 mm2 (986.8 circ. mils) for control cables,

• 0.5 mm2 (986.8 circ. mils) for essential or emergency signaling and communications cables, except for those assembled by the equipment manufacturer, and

• 0.35 mm2 (690.8 circ. mils) for telephone cables for nonessential communication services, except for those assembled by the equipment manufacturer.

See 4-6-4/Table 10 for current carrying capacity for insulated copper wires and cables.

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 23

(Revise Subparagraph 4-6-4/13.1.3, as follows.)

13.1.3 Fire Resistant Property (2008)

Where electrical cables are required to be fire resistant, they are to comply with the requirements of IEC Standard 60331-31 for cables greater than 20 mm overall in diameter, otherwise they are to comply with the IEC Standard 60331-21 for cable diameters 20 mm or less. For special cables, requirements in the following standards may be used:

• IEC Standard 60331-23: Procedures and requirements – Electric data cables

• IEC Standard 60331-25: Procedures and requirements – Optical fiber cables

Cables complying with alternative national standards suitable for use in a marine environment may be considered. Fire resistant type cables are to be easily distinguishable. See also 4-6-3/3.2.9 and 4-6-3/5.17.

CHAPTER 6 ELECTRICAL INSTALLATIONS

SECTION 5 SPECIALIZED INSTALLATIONS

1 High Voltage Systems

1.11 Machinery and Equipment

1.11.3 Transformers (2002)

(Revise Item 4-6-5/1.11.3(a), as follows.)

1.11.3(a) Application (2008). Provisions of 4-6-5/1.11.3 are applicable to power transformers for essential services. See also 4-6-4/9. Items 4-6-5/1.11.3(c) and 4-6-5/1.11.3(d) are applicable to transformers of the dry type only. These requirements are not applicable to transformers intended for the following services:

• Instrument transformers.

• Transformers for static converters.

• Starting transformers.

Dry type transformers are to comply with the applicable parts of the IEC 60076 Series.

Liquid-filled transformers are to comply with the applicable parts of the IEC 60076 Series.

Oil-immersed transformers are to be provided with the following alarms and protections:

• Liquid level (Low) – alarm

• Liquid temperature (High) – alarm

• Liquid level (Low) – trip or load reduction

• Liquid temperature (High) – trip or load reduction

• Gas pressure relay (High) – trip

24 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

3 Electric Propulsion System

3.7 Circuit Protection

(Add new Subparagraph 4-6-5/3.7.6, as follows.)

3.7.6 Direct-current (DC) Propulsion Motors Supplied by Semiconductor Converters (2008) The protection features of the semiconductor converters are to be arranged to avoid a damaging flashover in the DC propulsion motor. A possible cause of a damaging flashover would be removal of the field current. The protection features of the semiconductor converters are to take into account the increase in armature current created by the removal of the field current, due to accidental loss of the field, or activation of a protection feature intended to protect the field.

To verify compliance with the above, the maximum time-current characteristics that can be commutated by the motor as well as the time-current characteristics of the protective features of the semiconductor converters are to be submitted for review. To avoid a damaging flashover, the maximum time-current characteristics of the motor is to be provided by the motor manufacturer and is to be used by the semiconductor converter manufacturer to determine the appropriate set points for the protection features of the semiconductor converters.

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 25

CHAPTER 7 SHIPBOARD AUTOMATION OR REMOTE CONTROL AND

MONITORING SYSTEMS

SECTION 2 GENERAL SYSTEMS DESIGN AND ARRANGEMENT

REQUIREMENTS

(Revise Items 5, 7, 9, 13 and 19 of 4-7-2/Table 1, as follows.)

TABLE 1

Type Tests for Control, Monitoring and Safety Equipment (2008)

No TEST

PROCEDURE

ACCORDING. TO:

[See Note 7]

TEST PARAMETERS OTHER INFORMATION

5. Vibration (2008)

IEC Publication 60068-2-6, Test Fc

2.0 (+3/-0) Hz to 13.2 Hz – amplitude ± 1 mm (0.039 in)

13.2 Hz to 100 Hz – acceleration ± 0.7 g

For severe vibration conditions, e.g., on diesel engines, air compressors, etc.:

2.0 Hz to 25 Hz – amplitude ± 1.6 mm

(0.063 in)

25.0 Hz to 100 Hz – acceleration ± 4.0 g

Note:

More severe conditions may exist, for example, on exhaust manifolds of diesel engines, especially for medium and high speed engines.

Values may be required to be in these cases 40 Hz to 2000 Hz – acceleration ± 10.0 g at 600°C duration 90 min.

Duration: 90 minutes at 30 Hz in case of no resonance conditions;

Duration: 90 minutes for each resonance frequency at which Q ≥ 2 is recorded;

During the vibration test, functional tests are to be carried out;

Tests to be carried out in three mutually perpendicular planes;

It is recommended as guidance that Q does not exceed 5;

Where sweep test is to be carried out instead of the discrete frequency test and a number of resonant frequencies are detected close to each other duration of the test is to be 120 min. Sweep over a restricted frequency range between 0.8 and 1.2 times the critical frequencies can be used where appropriate. Note: Critical frequency is a frequency at which the equipment being tested may exhibit:

• malfunction and/or performance deterioration

• mechanical resonances and/or other response effects occur, for example, chatter

26 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

Min. Insulation Resistence

Rated supply voltage

(V)

Test voltage (V)

Before test

(MΩ)

After test

(MΩ)

Un ≤ 65 2 × Un

(min. 24 V) 10…