IS 8993: Shipbuildimg Topping Winches

2004·1.1 MB·English

by  Bureau of Indian Standards

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IS 8993 (2004): Shipbuildimg Topping Winches [TED 19:
Marine Engineering and Safety Aids]
“!ान $ एक न’ भारत का +नम-ण”
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“Knowledge is such a treasure which cannot be stolen”

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IS 8993:2004
ISO 6555:1988
W?7%7m

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Indian Standard
SHIPBUILDING — TOPPING WINCHES
( First Revision)
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ICS 47.020.50 ,,

(3BIS 2004
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
December 2004 Price Group 2
Marine Engineering and Safety Aids Sectional Committee, TED 19
NATIONAL FOREWORD
This Indian Standard (First Revision) which is identical with ISO 6555:1988 ‘Shipbuilding — Topping
winches’ issued by the International Organization for Standardization (ISO) was adopted by the
Bureau of Indian Standards on the recommendations of the Marine Engineering and Safety Aids
Sectional Committee and approval of the Transport Engineering Division Council.
This Indian Standard was first issued in 1978. The presentrevisionhasbeentaken up to harmonize it
with the latest version of ISO Standard.
The text of the International Standard has been proposed to b4 approved as suitable for publication
as an Indian Standard without deviations. Certain cmventkms are, however, not identical to those
used in Indian Standards. Attention is particularly drawn to the fo/I~@
a) Wherever the words ‘International Standard’ appear referring to this standard, they should be
read as ‘Indian Standard’.
b) Comma (,) has been used as a decimal marker while inIndianStandards,thecurrentpractice
is to use a point (.) as the decimal marker.
CROSS REFERENCES
In this adopted standard reference appears to certain International Standards listed below for which
Indian Standards also exist. The corresponding Indian Standards, which are to be substituted in their
places are given below along with their degree of equivalence for the editions indicated:
/rfternationa/ Standard Corresponding Indian Standard Degree of
Equivalence
ISO 2408: 1985 S?eel wire ropes for IS 2266 : 2002 Steel wire ropes for Technically
general purposes — Characte ristics general engineering purposes — equivalent

Specification (fourth revision)

ISO 2944:1974 Fluid power systems — —
and components — Nominal
pressures
ISO 3828 : 1984 Shipbuilding and IS 8650 (Parts 1 to 5) 1989 Shipbuilding Technically
marine structures — Deck machinery — Deck machinery — Glossary of terms equivalent
— Vocabulary and graphical symbols
ISO 4413:1979 Hydraulic fluid power — —
— General rules for the application of
equipment to transmission and control
systems
ISO 7825:1985 Shipbuilding — Deck IS 12719 : 1989 Shipbuilding — Deck Equivalent
machinery — General requirements machinery — General requirements
IEC 92 (1965 to 1988) Electrical — —
installations in ships
IEC 529 (1976) Classification of IS 12063: 1987 Classification of degrees Equivalent
degrees of protection provided by of protection provided by enclosures of
enclosures electrical equipment
(Continued on third cover)

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IS 8993:2004
ISO 6555:1988
Indian Standard
SHIPBUILDING — TOPPING WINCHES
( First Revision)
1 Scope 1SO 4413:1979, Hydraulic fluid power – Ganeral rules for the
application of equipment to transmission and control systems.
This International Standard specifies requirements and
characteristics of lightlypowered and externally powered top- ISO 7825: 1985, Shipbuilding – Deck machinery – General
pingwinchesasusedinderrickcargo-handling gear, Thelightly requirements.
powered topping winches include winches with electric or
hydraulicdrive. IEC92: 1965to 1888, Electrical installations in ships.
IEC528:1976, Classification of degrees ofprotection providad
2 Normative references bv enclosures.
The following standards contain provisions which, through
reference inthistext, constitute provisionsofthisInternational
Standard. At the time of publication, the editions indicated 3 Definitions
were valid. All standards aresubject to revision, and partiesto
agreements basedonthisInternational Standardareencouraged Forthe purposesofthisinternational Standard, the definitions
to investigate the possibility of applying the most recent given inISO 3828 and the following definitions apply.
editionsofthestandards listedbelow. Members ofIECandISO
maintain registers of currently valid International Standards.
3.1 nominal size: Figures derived from the drum load and
holding load, usedindesignation and marking.
ISO 2408 : 1985, Steel wire ropes for general purposes –
Characteristics.
3.2 drum Idad: Maximum load inatopping rope measured
ISO 2944 : 1974, Fluid power systems and components – atthedrumexitwhile hauling-intheropeatthenominalspeed,
Nominal pressures. the first layerof the rope being wound onto the drum.

ISO 3828 : 19&4rShipbuilding and marine structures – Deck
machinery — Vocabulary. 3.3 messenger rope: Rope used for transferring torque
from a powered winch to an externally powered winch.
I
—
1 , —
u
+=H-
0
V v v
Figure 1 – Exemples of lightly powered right-hand topping winches
1

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IS 8993:2004
1S0 6555:1988
3.4 Winch side 4.2.3 The flange height shall be such that with the rope
evenlywound, itwillprojectatleast2,5 topping-rope diameters
beyond the outermost layer of the ropa.
3.4.1 lightly powered right-hand topping winch: Winch
where the reduction gearorthe drum driveisontheright-hand
sideofthedrum, inrelationtoanobserver situated ontheside
4.2.4 The externally powered topping winch may be fitted
ofthe motor or power supply. (See figure 1.)
with asplitdrumtoseparate the messenger ropefrom thetop-
ping rope.
3.4.2 lightly powered left-hand topping winch: Winch
where the reduction gear orthe drum driveisonthe left-hand
sideofthe drum,inrelationtoanobserver situated ontheside
4.3 Drum-1ocking devices
of the motor or power supply.
Tha drum may be provided with a locking device. It shall be
3.4.3 externally powered right-hand topping winch: capable of withstanding at least 1,5 times the holding load.
Winch where thetopping ropaishauled-inontherightpartand
the messenger ropeishauled-in ontheIaftpartofthedrum, in
The lockingdevicashallbeinterlocked with awinch control so
relation to an observer situated on the sida of hauling-in the
that lowering the derrick isimpossible until the locking device
messenger and topping ropes. (Sea figure 2,)
hasbeen disengaged.
3.4.4 externally powered left-hand topping winch: If agreed with the appropriate national suthority or classifi-
Winch where the topping ropeishaulad-in onthe leftpartand cationsociety, sself-lockingwormgaar maybe consideredasa
the messenger ropeishauled-in ontha rightpart ofthe drum, drum-locking device.
inrelation toan observar situated ontha sideof hauling-in the
messenger and topping ropes. (See figure 2.)
4.4 Control brake system
4 Design and operation
The lightly powerad topping winch shall be providsd with a
brakingsystem automatically applied tothe prime mover when
4.1 General requirements the control handla isinthe “off’ position, orwhen the power
supply iscut off.
Topping winches shall meet the general requirements for deck
equipment in ISO 7625 and the specific requirements given in
The control brake system shall be capable of effectively ar-
4.2 to4.10.
restingandholdingaloadatthedrumcorresponding toatIaast
1,5 times thedrum load; ifthe brake isto beusedasalocking
NOTE – Attention isdrawn tothe existence of national safety regu-
device, itshallhold at least 1,5 times the holding load.
lationsincertain countries affecting the ropeendattachment.

4.2 Drum
4.5 Direction of motion of operating devices

4.2.1 Thedrum lengthshallbesuchthatthetopping ropecan The direction of motion of the operating devices of a lightly
befullyaccommodated innotmore than three layers,thecom- powered topping winch shallbesuchthatthederrickishoisted
plete length of the rope being evenly reeled.
bya clockwise movement at a hand-wheel or crank handle or
alternatively movement of a hand-lever towards the operator.
4.2.2 The drum diameter shall not be lessthan 16times the The derrick shall be lowered with motion of the operating
topping rope diameter. devices inthe opposite direction.
I
I
I
Messenger rope---- ~Topping rope Toppingroped ~ Messengerrope
v v
a) right-hand winch b) Iaft-hand winch
Figura 2 – Examples of sideof externallypowered topping winches
IS 8993:2004
ISO 6555:1988
4.6 Speed control 5.4 Further characteristics shallbe as indicated intable 1.
Ifagreedbetween thepurchaserandthemanufacturer, alightly Table1– Performance datafor topping winches
powerad topping winch may havespeed control ofthe drum.
Design Rope
Drum Holding
Nominal rope strength
load load
4.7 Topping winch deeign size diameter min.
kN khl mm kN
The designofthe topping winch shallbe baaad on the use of
10 32 10 32 18 160
6 x 37galvanizedsteelwireropewithfibrecoreinaccordance 10 63 10 63 24 315
with ISO 2406.
16 60 16 so 26 400
25100 25 100 32 500
The nominal breaking strength of the wire shall be at least
40 lCXI 40 100 32 E410
1770 N/mm?
20125 20 125 36 625
.
4.8 Emergency etop
6 Acceptance tests
The toppingwinch shallbefitted with a localemergency stop
whichcuts off the power supply orstopsthe operation of the 6.1 Thetorwingwinchshallbetastedasacompleteunit{i.e.
winch drive.
prime mover, drum, gearing and controls) at the manufac-
turer’s works and on board the ship.
4,9 Material etresees
Externally powered winches shallbetested with the use of an
Thestreaaaaincomponent partsofthewinch beingacted upon external drive.
byforcesderivedfrom the drum loadorbyforces derivedfrom
the holding load shall not exceed 0,4 times the 0,2 % proof 6.2 Factory type-teet
stressofthe material.
Thefactory type-test comprisestheoperations in6.2.1 to6.2.4.
The stresses in component parta of the winch at maximum
torque of the prime mover or being acted upon by at least
6.2.1 Operstion under no-load
1,5 times the holding Iosd shall not exceed 0,9 times the
0,2 % proof stressof the material.
The winch shallbe runfor 10min continuously, 5 min ineach
direction. While testing, the following shallbeverified :
4.10 Drive equipment
a) tightness againat oilleakage;
4.10.1 Electrical drives and control equipment shall conform
b) temperature of bearings;
tothe requirements of IEC 92. Deck-mounted enclosures shall
conform to IEC 529 IP 56.
c) power input;

4.10.2 Hydraulic drivesand control equipment shallconform d) satisfacto~ operation of control brake system (for
to the requirements of ISO 4413. System nominal pressure lightly powered winches);
shallbeselected from ISO 2944 and thedriveshalloperate ata
pressure 10 % below the selected nominal praasure, ifagreed e) presence of abnormal noise.
between the manufacturer and purchaser.
6.2.2 Operation under drum Ioed
5 Characteristics
The winch shall hoist the teat load (corresponding to the
nominal drum load)to aheight of 10mand immediately lower
NOTE – Attention isdrawn tothe requirements ofthe Classification
the load. Thistestshallbeperformed twice. While testing, the
Societies.
following shallbeverified:
5.1 The topping winch shall becapable of continuous oper- a) tightness againet oilleakage;
ation for a period of5 min while exerting the drum load.
b) temperature of bearings;
5.2 Hauling overload
c) power input;
Itshsllbepossibletooverload thetopping winch by1,25times
d) nominal spaad;
the drum load.
e) satisfactory operation of drum-locking device, iffitted;
5.3 Nominal speed at drum load shall be not less than
0,15 m/s. f) satisfactory operation of control brake syetem.
3
IS 8993:2004
ISO 6555:1988
6.2.3 Operation under holding load 7 Designation
The drum shall be held stationary and a load of at least Topping winches conforming to this International Standard
1,5 timesthe holding loadshallbeappliedtoaropesecuredto shall be designated by the following indkations, in the order
andwound onthedrum inasinglelayer. The loadshallbeheld given:
for a period of 2 min. While testing, the atate of the drum-
Iocking device and the component parts being acted upon by a) denomination: topping winch;
the load shallbe checked.
b) number ofthis International Standard: ISO 6555;
6.2.4 operation under atleast l,5timas drum load c) typeofwinch: Eforelectric, Hfor hydraulic, EPforex-
ternally powered drive;
The winch with the control brakesystemengaged shallholda
load corresponding to at Ieest l,5times the drum load for a d) nominal size(according to table 1);
period of2 min. While testing, the drum shallnot rotate.
e) right- orleft-hand winch (R or L) (see3.4);
6.3 Individual tests at the manufacturer’s works f) split drum (add X only if the winch has a split drum:
SSS 4.2.4);
Operation under no-load according to 6.2.1 and 6.2.2 e) shall
be effected. g) information onmotivepower: voltageandfrequency of
electric current, or hydraulicfluid pressureand flow rate.
6.4 On-board test
EXAMPLE
The winch shallbetestedasaunitofcargo-handling gear. The
Designation of a topping winch according to ISO 6555, elec-
extent of the test shall be suited to the test of the cargo-
trically powered (E), of nominal size 1063, right-handed (R),
handling gear, at least including the operations in 6.4.1 and
without splitdrum, voltage 440 V and frequency 60 Hz:
6.4.2.
Topping winch ISO S565-E-10 S3-R-44WS0
6.4.1 The complete hoisting and lowering of an unloaded
derrick twice.
8 Marking
6.4.2 Holdingoverloadofthewinch when thecargo-handling Topping winches complying with this International Standard
gear isbeingtested at 1,25timesthesafeworking load.While shallbepermanently marked with the following information:
testing, the following shallbeverified :
a) number ofthis International Standard: ISO 6555;
a) tightness against oilleakage;
b) nominalsize(see3.1).

b) satisfactory operation of the dr um-locking device, if
fitted; EXAMPLE
c) satisfactory operation ofthe control brake system. ISO6555-1063
4
(Continuedfrom secondcovet)
The Technical Committee responsible for the preparation ofthis standard has reviewed the provisions
of ISO 2944, ISO 4413, IEC 92 and has decided that they are acceptable for use in conjunction with
this standard.
For BISCertification Marking, details are available with the Bureau of Indian Standards.
For the purpose of deciding whether a particular requirement of this standard is complied with, the
final value, observed orcalculated expressing the result ofatest or analysis, shall be rounded off in
accordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised)’. The number of
significant places retained inthe rounded off value should be the same as that of the specified value
inthis standard.

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