ISO 3730:2012

INTERNATIONAL ISO
STANDARD 3730
Third edition
2012-10-15
Shipbuilding and marine structures —
Mooring winches
Construction navale et structures maritimes — Treuils d’amarrage
Reference number
©
ISO 2012
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ii © ISO 2012 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design and operation . 3
4.1 General requirements . 3
4.2 Material stresses . 4
4.3 Strength requirements . 4
4.4 Operating devices . 4
4.5 Brakes . 4
4.6 Drum design . 5
4.7 Auxiliary equipment . 6
4.8 Drive equipment . 6
5 Performance specifications . 6
5.1 Drum load . 7
5.2 Holding load . 7
5.3 Recovery load . 7
5.4 Rendering load . 7
5.5 Speeds . 7
6 Acceptance tests . 7
6.1 General . 7
6.2 Type test . 7
6.3 Individual test . 8
7 Designation system . 9
7.1 Designation of product models . 9
7.2 Nameplate . 9
7.3 Marking .10
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 3730 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 3730:1988), which has been technically revised.
iv © ISO 2012 – All rights reserved

INTERNATIONAL STANDARD ISO 3730:2012(E)
Shipbuilding and marine structures — Mooring winches
1 Scope
This International Standard specifies requirements for the design, operation, performance and acceptance
tests of automatic and non-automatic mooring winches, with hydraulic, electric or steam drive, which fulfil the
functions of manoeuvring, holding and storing mooring ropes on a single drum.
Such winches can also be used for warping purposes. See Table 1.
Table 1 — Functions
Non-automatic mooring winch Automatic mooring winch
Operation
Mooring On drum
Rope storing On drum
Tension-maintaining through brake On drum
Warping Optional on warping-end or on drum
Tension-maintaining through
On drum
automatic device
2 Normative references
The following referenced documents are indispensable for the application 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 2408, Steel wire ropes for general purposes — Minimum requirements
ISO 3828, Shipbuilding and marine structures — Deck machinery — Vocabulary
ISO 4413, Hydraulic fluid power — General rules for the application of equipment to transmission and control systems
ISO 6482, Shipbuilding — Deck machinery — Warping end profiles
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
right-hand winch
winch where the drum drive is on the right-hand side of the drum, in relation to an observer situated on the side
of the motor, power supply or controller
NOTE See Figure 1.
3.2
left-hand winch
winch where the drum drive is on the left-hand side of the drum, in relation to an observer situated on the side
of the motor, power supply or controller
NOTE See Figure 1.
3.3
central winch
winch where the drum drive is between the two drums
NOTE See Figure 1.
3.4
single drum winch
winch where one drum is driven by drive equipment
NOTE See Figure 1.
3.5
multiple drum winch
winch where two or more drums are driven by drive equipment
NOTE See Figure 1.
2 © ISO 2012 – All rights reserved

Left-hand single drum winch Right-hand single drum winch

Left-hand multiple drum winch Right-hand multiple drum winch

Central multiple drum winch
Figure 1 — Winch type diagram
4 Design and operation
4.1 General requirements
Mooring winches shall meet the general requirements for deck equipment in ISO 7825 and the specific
requirements given in 4.2 to 4.8.
NOTE Attention is drawn to the existence of safety regulations in certain countries and organizations affecting
winch controls.
4.2 Material stresses
The winch manufacturer shall be responsible for determining the strength requirements of the component parts
of the winch to withstand all loads of the respective nominal sizes of mooring winches, as specified in Table 2.
4.3 Strength requirements
4.3.1 Winch drum load
The allowable calculated stresses of any affected part of the winch, based on simple elastic theory, shall not be
greater than 0,4 times the upper yield strength (R ) or the 0,2 % proof strength, non-proportional extension
eH
(R ) of the material.
P0,2
4.3.2 Maximum torque of prime mover
The allowable stresses in the affected parts shall not be greater than 0,9 times the upper yield strength (R )
eH
or the 0,2 % proof strength, non-proportional extension (R ) of the material.
P0,2
4.3.3 Winch holding load
The allowable calculated stresses of the affected parts shall not be greater than 0,9 times the upper yield
strength (R ) or the 0,2 % proof strength, non-proportional extension (R ) of the material.
eH P0,2
4.3.4 Other requirements
Related requirements of OCIMF should also be satisfied for mooring winches used in tankers.
4.4 Operating devices
The direction of motion of the operating devices shall be such that the rope is hauled-in by clockwise movement
at a hand-wheel or crank handle or alternatively movement of a hand-lever towards the operator, and vice versa.
If it has been agreed between the purchaser and manufacturer, the rope may be hauled in by anti-clockwise
movement at a hand-wheel or crank handle.
The direction of motion of the operating devices shall be clearly and permanently marked.
Whatever the form of motive power, the operating devices shall, when under manual control, be arranged
to return to the braking or stop position automatically, unless otherwise agreed between the purchaser and
manu
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