ISO/DIS 4568

Ships and marine technology -- Sea-going vessels -- Windlasses and anchor capstans

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DRAFT INTERNATIONAL STANDARD
ISO/DIS 4568
ISO/TC 8/SC 4 Secretariat: SAC
Voting begins on: Voting terminates on:
2020-11-27 2021-02-19
Ships and marine technology — Sea-going vessels —
Windlasses and anchor capstans
ICS: 47.040
Member bodies are requested to consult relevant national interests in ISO/TC
4 before casting their ballot to the e-Balloting application.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
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STANDARD UNTIL PUBLISHED AS SUCH.
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NATIONAL REGULATIONS.
ISO/DIS 4568:2020(E)
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PROVIDE SUPPORTING DOCUMENTATION. ISO 2020
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ISO/DIS 4568:2020(E)
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© ISO 2020

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ii © ISO 2020 – All rights reserved
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ISO/DIS 4568:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Design and construction ............................................................................................................................................................................... 3

4.1 Chain cable.................................................................................................................................................................................................. 3

4.2 Cable-lifter .................................................................................................................................................................................................. 3

4.3 Warping ends ........................................................................................................................................................................................... 3

4.4 Mooring Winch ....................................................................................................................................................................................... 3

4.5 Strength requirements ..................................................................................................................................................................... 3

4.6 Braking system ........................................................................................................................................................................................ 4

4.6.1 Control braking system .............................................................................................................................................. 4

4.6.2 Cable-lifter brake ............................................................................................................................................................. 4

4.7 Emergency stop ...................................................................................................................................................................................... 4

4.8 Protection .................................................................................................................................................................................................... 5

4.9 Speed control ............................................................................................................................................................................................ 5

4.10 Direction of motion of operating devices ......................................................................................................................... 5

4.11 Drive equipment .................................................................................................................................................................................... 5

4.12 Remote control devices ................................................................................................................................................................... 5

5 Requirements .......................................................................................................................................................................................................... 5

6 Acceptance tests .................................................................................................................................................................................................... 6

7 Designation ................................................................................................................................................................................................................ 8

8 Marking .......................................................................................................................................................................................................................... 8

Annex A (informative) Information to be provided by the purchaser ............................................................................11

Bibliography .............................................................................................................................................................................................................................12

© ISO 2020 – All rights reserved iii
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ISO/DIS 4568:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/ iso/ foreword .html.

ISO 4568 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee SC

4, Outfitting and deck machinery.

This third edition cancels and replaces the second edition (ISO 4568:1986), which has been technically

revised.
The main changes compared to the previous edition are:

— technical or editorial changes of 1, 2, 3.3, 3.5, 4.4, 4.5.1, 5.4, 6.4 and Annex A;

— addition of 4.10, 4.11 and 6.3.d).
iv © ISO 2020 – All rights reserved
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DRAFT INTERNATIONAL STANDARD ISO/DIS 4568:2020(E)
Ships and marine technology — Sea-going vessels —
Windlasses and anchor capstans
1 Scope

This document specifies requirements for the design, construction, safety, performance and acceptance

testing of windlasses and anchor capstans.

This document is applicable to windlasses and anchor capstans of sea-going vessels which have electric,

hydraulic, pneumatic or external drive.

For combined windlasses/mooring winches, ISO 3730 is to be used in addition to this International

Standard.

NOTE 1 Where reference is made in the text to “windlass” it should be understood as “windlass and anchor

capstan”, where applicable.

NOTE 2 Attention is drawn to the requirements of relevant Classification Societies or the government of the

state whose flag the ship is entitled to fly.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 1704, Ships and marine technology — Stud-link anchor chains
ISO 3730, Shipbuilding and marine structures — Mooring winches

ISO 3828, Shipbuilding and marine structures — Deck machinery — Vocabulary and symbols

ISO 4413, Hydraulic fluid power — General rules and safety requirements for systems and their components

ISO 7825, Shipbuilding — Deck machinery — General requirements
IEC 60092 (all parts), Electrical installations in ships
IEC 60529, Degrees of protection provided by enclosures (IP Code)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 3828 and the following apply.

3.1
working load of the windlass, F

continuous working load that the prime mover of the windlass shall be able to apply for 30 min, derived

from the chain cable diameter and the chain cable grade
3.2
nominal size of the windlass

size expressed in terms of chain cable diameter, in millimetres, grade of chain cable, holding load and

maximum anchorage depth

Note 1 to entry: When the maximum anchorage depth is below 82,5 m, it shall not be expressed.

© ISO 2020 – All rights reserved 1
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ISO/DIS 4568:2020(E)

EXAMPLE 100/3/45- 100 m is the size designation of a windlass for 100 mm diameter chain cable of IACS

Grade 3, with a holding load of 45 % of the breaking load of the chain cable and the maximum anchorage depth

of 100m.
3.3
overload pull

short-time overload capacity necessary for the windlass to break ground, provided by the windlass

prime mover
3.4
holding load

maximum static load on the chain cable which the cable-lifter brake can withstand

3.5
nominal recovery speed

average recovery speed from the start of chain cables recovering to surfacing of the anchor where the

anchor and chain cables are freely suspended at a specified anchorage depth
3.6
symmetrical double cable-lifter windlass (type 1)
fully powered windlass with two symmetrical cable-lifters (see Figure 1)
3.7
single cable-lifter windlass (type 2)
single fully powered windlass with one cable-lifter (see Figure 2)
3.8
single cable-lifter unit (types 3 and 4)

windlass unit in which one cable-lifter is provided with an external power source (see Figures 3 and 4)

3.9
anchor capstan (type 5)

machine in which the cable-lifter is mounted on a vertical shaft (see Figure 5 and ISO 3828 for the

complete definition)
3.10
double cable-lifter windlass with connecting shaft type (type 6)

fully powered windlass in which two drive motors with two cable-lifters are connected by a shaft joint

(see Figure 6). The cable-lifter can be driven by either drive motor
3.11
control braking system

devices capable of automatically and stably braking a windlass when the windlass is stopped, downtime,

power off or any other non-operating state
3.12 Right- and left-hand windlasses
3.12.1
right-hand windlass

windlass where the drive for the cable-lifter or cable-lifter unit is on the right-hand side of the cable-

lifter, in relation to an observer situated on the side of the motor, power supply or controller

3.12.2
left-hand windlass

windlass where the drive for the cable-lifter or cable-lifter unit is on the left-hand side of the cable-

lifter, in relation to an observer situated on the side of the motor, power supply or controller

1) International Association of Classification Societies.
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ISO/DIS 4568:2020(E)
3.13
breaking load of the chain cable

minimum breaking load of the chain cable specified by IACS for the diameter and grade of chain cable

concerned
3.14
anchorage depth
depth measured as t
...