ISO
INTERNATIONAL STANDARD 3730
Second edition
1988-12-15
Corrected and reprinted
1989-10-01

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION

ORGANISATION INTERNATIONALE DE NORMALISATION
MEX~YHAPO flHAfl OPTAHM3A~MR fl0 CTAHflAPTM3A~MM

Shipbuilding - Mooring winches

Cons truc tion navale - Treuils d’amarrage

Reference number
ISO 3730: 1988 (E)
 

ISO 3730 :1988 (E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards bodies (ISO membe r bod ies). The work of preparing International
Standards is normally carried out through ISO technical committees. Esch member
body interested in a subject for which a technical committe e has been established has
the right to be represented on that committee . International organizations, govern-
mental and non-governmen tal, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechn ical Comm ission (IEC) on all
matters of electrotechnica l standardization.

the membe r bodies for approval before their acceptance as International Standards by
the ISO Council. They are approved in accordance with ISO procedures requiring at
least 75 approval by the membe r bodies voting.

International Standard ISO 3730 was prepared by Technica l Comm ittee ISO/TC 8,
Shipbuilding and marine structures.

This second edition cancels and replaces the first edition (ISO 3730 : 1976) and its
Addendum 1 : 1981, of which it constitutes a minor revision.

0 International Organkation for Standardkation, 1988

Printed in Switzerland
 

INTERNATIONAL STANDARD ISO 3730 : 1988 (E)

Shipbuilding - Mooring winches

1 Scope ISO 2408 : 1985, Steel wire ropes for general purposes -
Charac teris tics.
This International Standard specifie s the characteristic s of
automatic and non-automatic mooring winches, with electric, ISO 2944 : 1974, Fluid power System s and components -
hydraulic or steam drive, which fulfil the functions of Nominal pressures.
manoeuvring, holding and storing mooring ropes on a Single
drum. ISO 3828 : 1984, Shipbuilding and marine structures - Deck
machinery - Vocabulary.
Such winches may also be used for warping purposes.
ISO 4413 : 1979, Hydraulic fluid power - General rules for the
The functions of mooring winches covered by this International
applica tion o f equipmen t to transmission and con trol sys tems.
Standard are illustrated in table 1.

ISO 6482 : 1980, Shipbuilding - D eck machine ry - Warping

Table 1 - Functions end profiles.

1 2 ISO 7825 : 1985, Shipbuilding - Deck machinery - General

Non-automatic Automatic requiremen ts.
mooring winch mooring winch

I EC 92, Elec trical instala tions in ships.

Operation I EC 529 : 1976, Classification of degrees of pro tection provided

by enclosures.

3 Definitions
X X
Mooring For the purposes of this International Standard, the definitions
On drum On drum
given in ISO 3828 and the following definitions apply.
X X
Rope storing
On drum On drum
3.1 nominal size (of a mooring winch): Drum load at its
Tension-
X X nominal Speed as given in the Performance table (table 2).
maintaining
On drum On drum
through brake

Optional. Optional. 3.2 Loads

Warping On warping-end On warping-end
or on drum or on drum
3.2.1 dru m load (deprecated: rated load; hauling load;
Tension-main-
X hoisting load) : Maxim um rope tension, in kilonewtons,
taining through
automatic device On drum measured at the drum exit when the winch is hoisting or haul-
ing in at the nominal Speed with the rope wound on the drum in
a Single layer (see 3.3.1).

2 Normative references 3.2.2 (brake) holding load: Max imum tens ion, in
kilonewtons, that tan be maintained by a braking/locking
The following Standards contain provisions which, through
System in the first layer.
reference in this text, constitute provisions of this International
Standard. At the time of publication, the editions indicated
were valid. Al l Standards are subject to revision, and Parties to 3.2.3 stalling load: Maxim um rope tension, in kilonewtons,
agreements based on this International Standard are encour- measured at the drum exit when the drum cease s to rotate in
aged to investigate the possibility of applying the most recent the haul direction, the Prime mover be ing set for maxim um
editions of the Standards listed below. Members of IEC and ISO torque and the rope being wound on the drum in a Single
maintain registers of currently valid International Standards. layer .

1
 

ISO 3730 : 1988 (El

3.2.4 recovery load : Maximum rope tension, in 3.4.2 left-hand winch: Winch where the reduction gear or
kilonewtons, measured at the drum exit when the drum com- the drum drive is on the left-hand side of the drum, in relation
mences to rotate in the hau1 direction, the Prime mover being to an observer situated on the side of the motor, power supply
set for maxim um torque under automatic control and the rope or controller (in the case of a symm etrical winch).
being wo und on the drum in a Single layer. 1)

3.2.5 rendering load : Maxim um rope tension, in kilonewtons, 4 Design and Operation
measured at the drum exit when the drum just commenc es to
rotate in the opposite direction to the applied driving torque, 4.1 General requirements
the Prime mover being set for maximum torque in automatic
control, with the rope wound on the drum in a Single layer. 1) Mooring winches shall meet the general requirements for deck
equipment in ISO 7825 and the specific requirements given in
3.3 Speeds 4.2 to 4.8.

lt is recommende d that synthetic ropes under tension should

3.3.1 nominal Speed (deprecated: design Speed; rated
not be wound on a drum in more than one layer or short life will
Speed): Maxim um Speed, in metres per second, that tan be
result.
maintained by the winch when it is applying the drum load
(3.2.1).
NOTE - Attention is drawn to the existente of national safety regula-
tions in certain countries affecting winch controls.
3.3.2 light-line Speed (deprecated : no-Load speed; slack-
rope speed) : Maxim um rope Speed, in metres per second, that
the winch tan ma intain with the rope wound on the drum in a
4.2 Material Stresses
Single layer, and with negligible tension on the rope.
The winch manufacturer shall be responsible for determining
the strength requirements of the component Parts of the winch
3.3.3 creep Speed: Minimu m uniform Speed, in metres per
to withstand all loads of the respective nominal sizes of moor-
second, measured on the first layer, that the winch tan main-
ing winches, as specified in table 2.
tain under drum load.

4.3 Basic calculation

3.4 Mooring winch side

3.4.1 right-hand winch : Winch where the reduction gear or 4.3.1 Winch drum load
the drum drive i s on the right-hand side of the drum (s ec
The allowable calculated Stresses of any part of the winch,
figure l), in relation to an observer situated on the side of the
based on simple elastic theory, shall not be greater than
motor, power supply or controller (in the case of a symm etrical
0,4 times the 0,2 proof stress of the material.
winch).

4.3.2 Maxim um torque of Prime mover corresponding

to most severe working conditions

The allowable Stresses in the affected Parts shall not be greater

than 0,9 times the 0,2 proof stress of the material.

The allowable calculated Stresses of the affected Parts (in-

cluding the base plate) sh all not be greater than 0,9 times the
0,2 proof stress of the material.

4.4 Direction of motion of operating devices

The direction of motion of the operating devices shall be such

that the rope is hauled-in by clockw ise movemen t at a hand-
wheel or trank handle or alternatively moveme nt of a hand-
lever towards the operatot-.

The direction of Operation of all control handles shall be clearly

and permanently marked.

Whatever the form of motive power, the operating device shall,

when under manual control, be arranged to return to the brak-
ing or stop Position automa tically unless otherwise agreed be-
Figure 1 - Examples of right-hand winches tween the purchaser and manufacturer.

1) Definitions 3.2.4 and 3.2.5 apply to automatic mooring winches only.

2
 

ISO 3730 : 1988 (El

4.5 Brakes the outermost layer. The flange height of high-capacity drums
shall be such that the design rope may be fully stored without
projecting beyond the flanges when wound with the layers
4.5.1 Electric winches shall be provided with an automatic
superimposed directly upon each other (i.e. without a half rope
braking Sys tem which op erates when bringing the operating
diameter offset between adjacent layers).
device to the stop or braking Position, and also when there is
no power on the winch. The brake shall be capable of holding a
load on the hawser of 1,5 times the drum load and of stopping 4.6.6 Drum clutch
the drum rotation from its maxim um Speed without suffering
darnage. For other types of drive, a suitable braking System The drum shall be declutchable from the drive unless othetwise
should be agreed upon between the purchaser and manufac- agreed between the purchaser and manufacturer.
turer. Such a System shall be capable of holding a load on the
hawser of 1,5 times the drum load. 4.7 Auxiliary equipment

4.5.2 All winches shall be provided with a drum brake capa ble
4.7.1 Rope guide
of ma intai ning the winch holding load.
An automatic rope guide m ay be fitted on the drum if agreed
4.6 Drum design between the purchaser and manu facturer.

4.6.1 Design rope 4.7.2 Warping-ends

For design purposes the drum shall be based on a Warrington- A winch may may be specified with or without warping-ends;
Seale 6 x 36 steel-cored rope manufactured from their Pro file shall be in accordance with ISO 6482 and their
1 770 N/mm2 tensile grade wire in accordance with Group 3 of diameter shall be not less than the theoretical value given in
ISO 2408. column 11 of table 2.

NOTE - The above requiremen t does not preclude the use of other When warping-ends are specified, the purchaser shall state
types of rope in Service. whether the drum is to be declutchable or not. If only one
The use of ropes hav ing minimum tensile s trengths of 1 420 N/mm*, warping-end is specified, its Position (right or left) shall also be
1 570 N/mm2 and 1 770 N/mm2 has been approved by the Inter- stated in the order-.
national Association of Classification Societies (IACS).

4.7.3 Fibre-rope handling gear

4.6.2 Drum diameter
A winch may be specif ied with or without fibre-rope handling
The drum diameter shall be not le ss than 16 ti mes the diameter gear.
of the design rope, as specified in column 11 of table 2.
For synthetic ropes or drums, the minimum winding ratios shall
be :
4.6.3 Drum capacity
- Polyamide : 6
Drums shall be of two capacities, “normal” and “high”. The
minim um length of design rope to be stored on normal-capa city - Polyester : 6
drums is given in column 12 of table 2. High-capacity drums
shall store twice the length of rope of normal-cap acity drums. - polypropylene :

.6.4 Drum length For synthetic ropes on warping-ends, see ISO 6482.

The drum length of normal-capa city drums s hall be such that

4.8 Drive equipment
the total length of the design rope tan be accommod ated in not
more than five layers.
4.8.1 Electrical drives and control quipment shall conform to
The drum length of high-capacity drums shall be such that the the requirements of IEC 92. Deck-mounted enclosures shall
total length of the design rope tan be accommod ated in not conform to IEC 529 IP 56.
more than eight layers.

Where a Split drum is used, the nu mber of layers on the storage 4.8.2 Hydraulic driv es and control equipment shall conform to
the requirements of ISO 4413. System nominal pressure sh all
section may be increased.
be selected from ISO 2944, and the drive shall sperate at a
NOTE - Attention of users of the winch must be drawn to the pressure 10 below the selected no minal pressure , if agreed
possibility of darnage occurring to the rope if large loads are applied between the manufacturer and purchaser.
while more than four layers of rope are reeled on the drum.

.6.5 Drum flange height 5 Performance

When all the rope is reeled on a normal-capa city drum, the The mooring winch shall be capable of exerting the hauling,
flange shall project at least 1 5 times the rope diam eter above holding, recovery and rendering loads according to its nominal

3
 

ISO 3730 : 1988 (EI

size, as specified in table 2 and within the limitations specified The test shall be carried out as follows:
in 5.1 to 5.4.
a) Operation under Ioad : Hauling and veering of the drum
The device for automatic Service may also enable smaller pre- loa d of the winch for 30 min continuously.
set values of rendering and recovery loads to be obtained
b) Holding test : To be tested by applying the holding load
- For definitions of the loads and Speeds in 5.1 to 5.5.3, refer to
to a rope led off the drum, when the drum shall not rotate.
NOTE
3.2 and 3.3 respectively. This may be carried out on-board ship if agreed between the
purchaser and manufacturer.

5.1 Drum load c) Automatic brake System test : This test shall satisfy the
requirements of 4.4. lt may be carried out on-board ship id
he drum load shall be not greater than 0,33 times the breaking agreed between the purchaser and manufacturer.
strength of the design rope when operating at the correspond-
ing nominal Speeds. d) A tomatic controls : Verify the recovery rendering
loads.

5.2 Holding load

e) While testing, the following shall be checked:

The h olding load shall be not less than 0,8 times the breaking
1) presence of abnormal temperature of bearings;
strength of the design rope.

2) measurement of actual Speed;

5.3 Recovery load
3) presence of abnormal noise;
The recovery load shall be not less than 0,5 times the drum
4) power consumption.
load.

Where tests are required in excess of the type test, these

5.4 Rendering load should be agreed between the purchaser and manufacturer at
the time of the contract.
The rendering load shall be not m ore than 0,5 times the break-
ing strength of the design rope.
6.1.2 Individual tests

5.5 Speeds The following tests shall be carried out:

5.5.1 Nominal Speed a) Operation under no-load: Running for 30 min, 15 min
continuously in each direction, at light-line Speed.
The minimum design Speed for the respective nominal sizes of
mooring winch shall be in accordance with that specified in b) Correct Operation of braking System.
table 2.
c) While testing the following shall be checked:

5.5.2 Light-line Speed 1) tightness against oil leakage;

The ligh t- line Speed, measured on the first Iayer on the drum, 2) temperature of bearings;
shall be n ot less than 0,5 m/s.
3) presence of abnormal noise;

5.5.3 Creep Speed

4) power consumption;

The creep Speed shall be not more than 0,5 the nominal Speed of drum rotation.
5)
Speed and not more than 011 5 mls

6.2 O n-board aceptance tests and inspections

6 Acceptance tests
lt is recommended that the inspections and tests given in 6.2.1
and 6.2.2 be carried out on-board the ship, to ensure that the
6.1 Rules concerning testing at manufacturer’s
winch is fully operable.
works for acceptance by manufacturer and
purchaser
All tests shall be carried out under ship power.

6.1.1 Type testing

6.2.1 Running tests
One winch of each batch shall be tested. This test may be
replaced by a prototype test certificate if agreed by the The winch shall be run for 10 min at light-line Speed, 5 min con-
manufacturer and purchaser. tinuously in each direction.

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ISO 3730 : 1988 (El

6.2.2 Bearings h) type of drum connection (add X only if it is de-

clutchable : see 4.6.6);
Bearing tem perature rises shall be checked.
i) information on motive power: voltage and frequency of
electric current, or hydraulic fluid pressure and flow rate, or
steam pressure and flow rate.
7 Designation
EXAMPLE
Mooring w inches conforming to this International Standard
shall be designated by the following indications, in the Order Designation of a mooring winch according to ISO 3730, with
given : electric drive of nominal size 20, normal drum capac ity, left-
hand model, with one warping-end on the right and with
a) denomination : mooring w inch; declutchable drum, voltage 440 V and frequency 60 Hz:

Mooring winch ISO 3730-E-20-N-L-IR-X-W /60

b) number of this International Standard: ISO 3730;

c) type of winch : E for electric, H for hydraulic, S for 8 Marking

steam drive;
Mooring winches complying with this lnternati onal Standard
d) nominal sizc (see 3.1); shall be permanently marked w ith the following information :

e) drum capacity : N (normal) or H (high) (see 4.6.3); a) number of this International Standard: ISO 3730;

f) right- or left-hand winch (R or L) (see 3.4);

Id nominal size (see 3.1).

EXAMPLE
g) number and, where applicable, Position of warping-
ends: R or L (see 4.7.2); ISO 3730-20

5
 

Table 2 - Performance specifications

1 2 3’) 4’) 5’) 6 7 8 92’ 102) 11 12

Minimum Drum capacity

Nominal Light-line Creep Design Holding Recovery Rendering Theoretical
Drum breaking
Speed Speed Speed rope load load load diameters of drum
load strength
min. min. max. diameter min. min. max. and warping-ends normal high
Nominal of rope
size
see see see see see see see see see see see
5.1 5.5.1 5.5.2 5.5.3 4.6.1 4.6.1 5.2 5.3 5.4 4.6.2 et 4.7.2 4.6.3

kN mls mls m/s mm kN kN kN kN mm m m

5 50 0,25 0,5 0,125 18 204,2 150 25 90 288 180 360

8 80 0,25 0,5 0,125 22 305 220 40 135 352 200 400
12 125 02 0,5 w 26 426 310 60 189 416 200 400
16 160 02 0,5 OJ 32 645,2 470 80 286 512 250 500
m 200 0,16 0,5 0,08 36 816,6 590 100 362 576 250 500
25 250 0,16 0,5 0,08 40 1 008,2 730 125 447 640 250 500
32 315 0,13 0,5 0,065 44 1 219,2 880 155 540 704 250 500
40 400 0,13 0,5 0,065 4-a 1 451,8 1 050 200 645 768 250 500

1) Only applicable to manually controlled winches.

2) Only applicable to automatically controlled winches.

 

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ISO 3730 : 1988 (E)

UDC 629.12.015 : 621.864

Descriptors : shipbuilding, mooring devices, winches, specifications, dimensions, tests, designation, marking.

Price based on 6 pages