BS MA 55 Lifeboat Winches

7/27/2019 BS MA 55 Lifeboat Winches

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BSI B S * M A 5 5 75 l b 2 4 b b ï

0 3 3 8 4 6 4 T

W

BS

MA

55: 975

British Standard:

Marine

Series

Specification for

Ships‘deck machinery -

lifeboat winches

Contents

Foreword

Speci f icat ion

e 1 Scope

2. References

3.

Definitions

4 . Design and construc tion

5. Performance

6. Accep tance tesfs

7 . Marking

Page

1

2

2

2

2

5

5

6

Appendices

Page

A. On board acceptan ce tests and inspections

7

B. Inform ation to be provided by the

purchaser

7

Table

1 Standar d lifeboat winches

Figure

performance data

1 Types of boat winches 3

Foreword

This British Standard has been prepared under the

authority of t he Shipbuilding and Marine Industry

Standards Comm ittee and has been developed from

a proposal submitted by the B ritish Ship Research

Association.

machinery for ships and provides requirements for

the design, construction, safety, performance and

acceptan ce testing of lifeboat winches.

Other stan dards in the series are:

BS MA 30 Glossary of term s and graphical sym bols

for ships’ deck machinery

BS M A 1 Ships’ deck machinery-cargo winches

BS MA

32

Ships’ deck machinery-mooring winches

BS MA 33 Ships’ deck machinery-warping winches

BS MA 3 4 Ships’ deck machinery-cap stans

It fo rms one of a series dealing with deck

O

BS MA

35

Ships’ deck machinery-windlasses

BS MA 36 Ships’ deck mach inery-topp ing winches

BS

MA

52 Ships’ deck m achinery-accommodation

ladder winches

BS

MA

53 Ships’ deck mach inery-tow ing winches

for deep sea use

BS MA 56 Ships’ deck machinery-anchor cable

stoppers

BS

MA

57

Ships’ deck mac hinery-ro pe storage reels

CertiBatìon Attention is drawn to t he certification

facilities described o n the last page of this standard.

G r 3

British Standards Inst i tutio n

2

Park Street Lon don

W I A

2BS

Telephone O1

-629 9000

Telex

266933

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BSI

B S * N A * S 5

75

1 6 2 4 b b î

0 1 3 8 4 6 5 1

I

BS MA 55: 975

Specif ication

NOTE 1

This standard takes into account the design

criteria listed in the Board

of

Trade now Department of

Trade-Maxine Divisio n) regul ations for davits and

launching gear,

Le.

Schedule

15

and Rufe

37

9)

of

the

Merchant Shipping Life Saving Appliances) Rules

1965

with which British registered ships comply.

NOTE 2 Users of this British Standard: Marine Series,

should note that w hile observing the requirements of

the standard they should at the same

time

ensure

compliance with such statutory requirem ents, rules and

regulations as may be applicable to the individual ship

concerned.

1

Scope

This British Standard specifies requirements for

the design, construc tion, safety, performance and

acceptance testing of lifeboat winches used for the

launching, recovery and stowage of lifeboats,

emergency lifeboats, class

C

boats, liferafts and

inflatable boats.

The standa rd does not include requirements

for the prime mover used to o perate the winch.

2. References

This

standard makes reference t o the following

British Standards.

BS 302

BS 1486 Lubricating nipples

Wire ropes for cranes, excavators

and general engineering purposes

Part

1

Lubricating nipples and

adaptors fo r use on m achinery

and vehicles

BS 1597 Radio-interference suppression

on marine installations

BS

2045 Preferred numbers

BS 2949 Rotating electrical machines for

use in ships

BS 339 9 Transformers for use

in ships

BS 513 5 Metal-arc welding of carbon and

carbon-manganese steels

BS 6883 Elastomer-insulated cables for

fured wiring in ships

BS MA

30

Glossary of ter ms an d graphical

symbols for ships’ deck m achinery

3

Defini t ions

For th e purposes of this British Standard, the term s

and their definitions given in BS

MA

3 0 apply.

Terms particularly applicable to this British Standard

are

defined as follows.

3.1

working load.

The maximum pull exerted by

the fall or falls at the winch drum during lowering,

hoisting or stowing of the lifeboat which in any

case is ta be taken as no t less than the working

load on the davit or davits divided by the velocity

ratio of the lowering tackle.

3.2 static test load. The load equivalent to 1.5

times the working load, which the w inch brake shall

be capable of lowering and holding.

3.3

emergency lifeboat. A

lifeboat not exceeding

8.5

m in length w hich is required to be k ept

ready for immediate use in an emergency on certain

classes of ship while the ship is a t sea.

3.4

nominal size.

The nearest preferred number,

expressed in tonnes, t o the working load. I t is

derived from the working load of the winch at its

design speed.

NOTE 1 The range

of

nominal sizes covered

by

the

standard

is

listed in table 1 column

1 ;

the associated

working loads are listed in column 2.

NOTE 2. The nominal sizes of lifeboat winches in table

1

have been selected from the R10 eries of preferred

numbers, see BS 2045.

4.

Design and construction

4.1 Handing of

winches.

(See figure 1 Lifeboa t

winches may be designed for right-hand or left-hand

operation.

A

winch is termed a right-hand winch in relation

to an observer situated on the side of the motor,

power supply or controller , when the reduction gear

or the drive for the drum is on the right-hand side of

the drum.

Similarly, a winch is term ed

a

left-hand winch

when the reduc tion gear or the drive for the drum is

on the left-han d side of the d rum .

4.2 Material stresses.The mmuf acturer o f the winch

shall be responsible for determining t he stre ngth

requirements of the component parts of the winch

to withstand the working load. Furthermore the

stress level in any part of the winch shall no t exceed

the tensile strength of the m aterial divided

by

4.5.

4.3 Drum design

4.3.1 Lifeboat winches may be designed with one

or two drums.

4.3.2 Winch drums shall be arranged to keep the

two rope falls separate and enable them to pay ou t

at the same rate.

4.3.3 The drum length shall be such that th e rope

can be fully accommodated in not more than two

layers, the com plete length of the rope being

evenly reeled. For lifeboats weighing less than

6500

kg (fully laden) three layers are permissible.

The purchaser shall state o n the order the length

of rope requ ired. See append ix B, item

(0.

4.3.4 Th e drum diameter shall not norm ally be

less than 16 times the rope diameter. Th e

recommended diameters are listed

in

table 1,

column 6.

4.3.5 The flange height shall be such tha t it wili

project at least 1.5 rope diameters beyond the

outerm ost layer when the rope is fully and

evenly reeled on the dru m.

4.4

rum clutch.

The drum or drums and drive

mechanism shall be so arranged that they are

disconnected from any means provided

for

power

recovery except when hoisting th e load.

7511-1.5k-B

2


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Left-hqndpowered

boat winch

BSI

B S * N A * 5 5

75 m L b 2 4 b b î O L 3 8 q b b 3

Observer pos ition

Left-hand powered doub ledrum

boat winch

Observer position

Powered symm etrical dou bledr um boat winch

BS

MA 55:

975

Right-hand powered

boat winch

Observer position

Right-hand powered doubledru m

boat

winch

Observer position

,

Observer position

Figure

1.

Types

of

boat

winches

3

PYRIGHT 2002; British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Qatar Petroleum/5943408103, User=, 09/11/200205:55:02 MDT Questions or comments about this message: please call the DocumentPolicy Management Group at 1-800-451-1584.

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B S I B S * f l A * 5 5

I

BS MA

551975

4.5 Brake design

4.5.1

Drum brake

4.5.1.1 The winch shall be fitted with a b rake

capable of applying a braking torque sufficient to

maintain the required static test load.

4.5.1,2 The brake shall be capable of

maintaining the static test load when the winch

is unattended.

4.5.1.3

The w inch brake shall be

so

arranged that

is is normally in the ON position and returns t o the

ON

position when the control handle is no t being

operated.

4.5.1.4 Ratchet gear shall be incorporated i nto

the hand b rake mechanism and shall be fitte d with

at least two pawls or rollers.

4.5.2

Governing brake The w inch shall also be

fitted w ith a governing brake capable of

governing the low ering speed of the lifeboat t o

comply with the requirements of 5.4.

4.6

Crank handles

4.6.1 U winches shall have provision to b e driven

by one or tw o crank handles or hand wheels to

allow the lifeboat, class C oat or inflatable boat

to be recovered by hand.

4.6.2

Unpowered winches may be driven by a

portable pow er unit if required. Where a portable

power unit is used;provision shall be made for th e

transfer of the torque to the winch frame.

4.6.3 Winches serving liferafts are to be prov ided

with a manual rewind for rapid recovery of the

light hook.

4.6,4 Provision s h d also be made to allow the boat

falls to be manually unwound.

4.6.5

The w inch shall be

so

designed tha’t the crank

handle or handles are not rotated by moving parts

of the winch when th e winch is lowering the

lifeboat under gravity conditions, or hoisting the

lifeboat under power.

4.6.6 The hand crank radius should be no t less than

3

mm nor more than 450 mm so that the effort

required on the handle w hen hoisting the lifeboat

should no t generally exceed

100

N for single man

crank handles. In no case should this effort exceed

160

N.

Greater forces are permissible for a s hort

period while stowing the lifeboat.

Table 1. Standard l i feb oat winches perform ance data*

4.7

Designrope

4.7.1

This standard is based on the use of 6

x

36

galvanised steel wire rope with fibre co re as

specified in BS 302 180 kgf/mm2 tensile grade).

Rope diameters are listed in table 1, column 5.

4.7.2

The rope size shall be such tha t its minimum

breaking load (kg) is not less than six times the

working load.

NOTE.

he above requirement does not preclude the

use in service of another suitable wire rope construction,

which c omplies with a reco gnized standard.

4.8 Control methods and m ovements

4.8.1

Method of control The lifeboat w inch shall

be controlled manually.

4.8.2 Power sources Powered w inches shall be

designed for operation powered by either electric

or hydraulic drive, designated E for electric or H for

hydraulic.

4.8.3 Direction of motion of the operation devices

Ail control handles, handwheels and push buttons

shall be clearly and permanently m arked with their

purpose and m ode of o peration, unless this is

obvious from their design and purpose.

of

hoisting for crank handles or handwheels.

NOTE. Attention is also drawn

to

the International

Labour Organisation ‘Code

of

practice

on

safety and

health

in

dock work’.

4.8.4

rsh

buttons

When fitted, separate push

butto ns shall be provided for each motion of the

deck machinery, e.g. one push bu tton to haul in

and a separate button to veer.

The butto ns shall be depressed to actuate the

winch and when cancelled shall cause the m achine

to be stopp ed and effectively braked.

The positional relationship between contr ol

push button s shall be such as to represent the

action they are to initiate, e,g. a ‘raise’ butto n shall

be placed above its associated ‘lower’ butto n.

4.9

Construction. Materials used for c onstruction of

the winch shall be in accordance with the ap propriate

British Standard fo r the m aterial selected to ensure

compliance with

4.2.

4.9.1 Welding All welding shall be carried out in

accordance with the requirem ents of BS 5135.

Provision shall be made t o indicate the direction

1 2

Nominal Working

size load

kg

1

1

020

2.5

2

550

4 4 080

6

6 120

10

10200

*See note to

5.1.

3

Static test

load

kg

1 5 3 0

3 875

6 120

9

180

15 300

4 5

Rope minimum

breaking load Stee l wire

-

rope

6 X working

bad fibre core

per fall BS

302

diameter

kg mm

3

060 9

7

650 12

12 240 16

18 360 18

30 600 24

-

4

6

Recommended

drum

diameters

mm

160

200

250

315

400



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BS

MA

55:

1975

4.9.2 Access Access openings to prime m overs,

reduction gearing, bearings, brakes and co ntrol

mechanisms shall be provided t o ensure that adequa te

inspection an d maintenan ce is facilitated.

4.9.3

Lubrication

The winch shall be designed to

ensure that all bearing surfaces are capab le of being

properly lubricated d uring operation when inclined

at any angle up to 15 o in an y direction.

Adequate and accessible greasing and oiling

points shall be provided to e nsure tha t all required

surfaces are capable of being properly lubricated,

Nipples shall be in accord ance with th e requ iremen ts

of BS 1486: Part 1. Sumps and oil baths shall be

provided with sight glasses or o ther means o f

measuring

oil

level. Where necessary oil and

condens ation drain plugs shall be pro vided.

4.9.4 Electrical equipment Electrical equipment

shall be installed in accordanc e with the ‘Regulations

for electrical equipm ent of ships’, published by th e

Institu tion o f Electrical Engineers.

Electrical equipm ent shall

also

comply with the

requirements of BS 1597, BS 2949,

BS

3399 and

BS

6883.

shall be deck watertight, and d eck portable

enclosure s of electrical equipm ent shall be

weatherproof as defined in

BS

2949.

4.9.5 Protection

of

metallic surfaces

The surface

shall be free from moistur e, oil, grease, dirt, weld

spatter, burrs and other imperfections, before

applying the protective finish to m etallic surfaces.

Externa l surfaces and internal surfaces shall be

primed with an anticorrosive priming paint adequate

to provide protection against a marine environment,

as soon as practicable after com pletion of th e surface

preparation.

Internal surfaces of gear boxes shall be co ated

with an oil proof paint.

5.

Performance

5.1

The winch shall be capable of exerting the

working load listed in table 1, column 2.

NOTE.

Th e performance data contained in table

1

is

based upon the

use

of a double drum with tw o fails each

operating on a single part tackle. Where multi-part

tackle is used the winch design should be amended

accordingly.

5.2

Powered boat winches shall be capa ble of

hoisting the lifeboat with

a

speed not less than

0.05 m/s for lifeboats and with a speed not less

than 0.3 m/s for ‘emergency’ boats.

5.3

Unpowered b oat w inches shall be capable of

hoisting the lifeboat with a speed not less tha n

0.01

m/s.

5.4

The winch shall be capab le of lowerin g the

lifeboat under gravity co nditions at speeds not

less than 0.30 m/s nor greater than 0.60 m/s,

when the ship is inclined at any com bination of

angies up t o

10

o

trim and/or 1 5

o

list.

5.5

The sta tic test loads associated with the

working loads are listed in table 1, column 3, and

e

Deck mou nted enclosures of electrical equipment

a

these shall not be less than 1.5 times the working

load. (See

6.2.3.) .

6

Acceptance tests

6.1 Rules concerning fhe tes ts at manufacturer’s

works for the acceptance

of

the w inch by the

purchaser

6.1.1 The win ch shall be tested as a comp lete unit

(i.e. prim e mover, drum , gearing and controls) for

the factory test. In the case of unpowered winches,

they shall be tested by manu al means.

6.2 Factory test. The test shall conform to the

requirements of

6.2.1,6.2.2,6.2.3

and

6.2.4.

6.2.1

Test without load The winch shall be run at

l ight h e peed for a per iod of 10min, 5 min in

each direction. For the purpose of this test,

unpowered winches may be tested in conjunction

with a slave prime mov er. During the test th e

following shall be recorded on th e test

certificate.

(a) Oil tightness of joints.

(b) Temperature of bearings.

(c) Power inp ut (powered winches only).

(d) Light line speeds attained a t the drum or

d r u m .

(e) C orrect operation of the brakes and ratchet

gear.

6.2.2 Hoisting test The winch shall hoist a load

related to the weight of the lifeboat and its

required equipment at the speed stipulated in

in

5.2

to

a

height of not less than 15 m. During the

test the following shall be re corded on the test

certificate.

(a) Oil tightness of joints.

(b) T emp erature rise of bearings.

(c) Power input (pow ered winches only).

(d) Hoisting speed at each drum oc drums.

(e) Correct operation of the brakes and ratchet

gear.

6.2.3

Brake test The brake shall be applied and

a

static test load equivalent to the working load times

1.5 shall be applied to a rope secured to a nd w ound

on the drum fully and evenly reeled to the specified

two or three layers. The drum shall not r otate

and it shall be dem onstrated t ha t it is possible to

release the brake. It shall also be dem onstrated that

the w inch can slowly lower th e static test load, under

control of the brake, for at least one complete

revolution of the drum and then hold the load. The

result shall be reco rded on th e test certificate.

6.2.4 Lowering test A load equivalent to the working

load shall be applied to a rope secured to and wound

on the drum fully and evenly reeled to the

specified two or three layers. The drum shall be

declutched from the prime mover and the drum

brake released. The governing brake shall govern the

speed of descent to com ply with the requirements

of 5.4. The total lowering height for this test shall

no t be less than 15 ni.

5



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6.2.4.1 A

load of

1.1

times the working load

shall

be lowered at full governed speed of 0.6 m/s

throughout a distance of no t less than 3 m, the

hand brake being sharply and intermitte ntly

applied. At

no

time after the hand brake is

so

applied, shall the test load drop more than

1

m.

6.3 Winches fo r ‘emergency’ lifeboats,

In

addition to th e tests contained in 6.2,winches for

7.

Marking

All lifeboat winches shall be permanently marked

by means o a rating plate, prominently displayed.

The

rating plate shall contain suc h informati on as is

relevant to the winch, includin g the following.

(a) Manufacturer’s name or trade m ark,

.

reference type number and serial number.

(b) Number of this British Stand ard (BS MA 5 .

-.

i ) ówer requ ireme nts (e.g. e lectric).

(1) Rate d voltage (volts).

(2)

Rated frequency (hertz).

3)

Rated current (amperes).

4) Rated in put (watts).

I

BS

MA 55 1975

eniergqncy lifeboats shall be tested by hoisting a

load related to 1.1 times the combined weight of

the boat, its equipment and a distributed load of

1016 ka, all at th e hoisting speed stipulated in 5 2

(cj Handing (right or left).

(d) Nominal size.

(e)

Drum

capacity.

0 ype of drive.

YRIGHT 2002; British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Qatar Petroleum/5943408103, User=, 09/11/200205:55:02 MDT Questions or comments about this message: please call the Document

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B S I B S* í l A* 55 75

=

l b 2 L l b b î

O L 3 ä q ï O 5

Append i x A

On board acceptance tests and inspections

I t

is

recommen ded that the ship owner should arrange

for the following inspections and tests to be carried

ou t on board the ship, to ensure that the winch is

fully operable. The winch shou ld be tested as a

complete un it (prime mover, drum, gearing and

controls) to gethe r with its associated davits sheaves

and lifeboat. h i he case of unpowered winches

they should be manually operate d.

A . l Primary inspections

A . l . l

Inspection ports should be opened and

interior of casing checked for cleanliness, surface

deterioration and foreign matte r. (For powered

winches.)

A.1.2

If fitte d, filters in hydr aulic lines shou ld be

checked for cleanliness. (For powered winches.)

A.1.3

Power connection should be checked for

tightness. (For po were d winches.)

A.1.4 Deck and casing conn ection s should be

checked for tightness.

A.1.5 Check that the correct grades of oil have been

supplied in sufficient volume for safe operation.

Sumps and oil baths should be chec ked for correct

volume of oil.

A.2

Running tests. The w inch should conforin with

the requirements of

6.2.1

when running under ship

power. (For powered winches.)

A.3

Performance test

A.3.1 The winch should be ca pable of lowering the

lifeboat from the embarkation deck into th e water

loaded with the necessary equipment a nd a distributed

load equivalent to the full number of persons it is

deemed fit to carry plus 10 of the actual weight of

the lifeboat, equ ipment and persons at a speed

defined in

5.4.

A.3.2

The winch should be tested in accordance

with

6.2.2

and

6.3

and should be seen to raise the

lifeboat at such a speed as not to cause any detriment

to th e lifeboat and associated equipment. (Powe red

winches only.)

BS MA 55:1975

A.3.3 The brakes and ratch et mechanism sho uld be

seen to operate satisfactorily.

A.3.4

The cleanliness of oil filters shou ld be no ted

after the test.

A.4 Bearings. Bearing temp eratu re rises should be

measured and c hecked against the factory test

results.

A.5 Vibration.

A t

the end of the tests, the winch

should be run through th e full range of sp eeds as a

check fo r vibration.

A.6

Additional tests. Other tests may be req uested

by the purchaser at his expense and convenienc e.

A.7 Performance certificate. A certificate of

performance should be provided by the installation

autho rity on com pletion of the tests.

Append i x B

In fo rmat io n to be provided by th e purchaser

The purchaser should provide the manufacturer of

the winch with th e following basic informatio n at the

time of the enquiry.

(a) Lifeboat winch to BS MA

55

(b) Type of drive required.

(c) Nominal size.

(d) Whether left or right handed.

(e) Type of mounting.

f )

Drum capac ity and/or distance between light

waterline and life boat d eck.

(g) Wire rope dia mete r, tensile grade and

construction, if other than that shown in 4.7.1.

(h) If additional tests are to be performed.

(i) Weight and specific duty of lifeboat

(lifeboat, emergency lifeboat, etc.)

j)Number of parts in the tackle.

(k) If variations are required from sta ndard

speed.

(1) A dditio nal paint finish required.

(m) Number of crank handles.

(n) Power su pply available.

7

YRIGHT 2002; British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Qatar Petroleum/5943408103, User=, 09/11/200205:55:02 MDT Questions or comments about this message: please call the DocumentPolicy Management Group at 1-800-451-1584.

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BSI

C e r t i f ic a t i o n T ra d e Ma r k

he

K i temark

The K itemark

is

the registered certification trade m ark of the British Standard s Institution. A licence

to

use the Kitemark on

or in relat ion to a product will be granted to any manufacturer or producer who demonstrates that h e can an d will be able

consistently t o m ake that product t o

a

specified British Stand ard. His capability of doing so is initially assessed by inspection

of his production process, quality control organ ization a nd test facilities, and by independen t testing of a sample of the product

against all the criteria of the relevant s tandard . Th e licensee

is

required to accept, and to operate in accordance with, a BSI

scheme of supervision and co ntrol which identifies the tesfs to be carried out during manufacture and o n the comp leted product,

and specifies the frequency of such testing. BSI carries ou t unanno unced inspection visits to the manufacturer s works and audit

testing o ft h e product, and may withdraw th e licence for any failure of the manufacturer to comply with the relevant standar d

or with the requirements of th e scheme of supervision and control. Th e presence of the Kitemark on or in relat ion to a product

isa n assurance that thego ods have been produced under

a

system of supervision,control an d testing, operatedd uring ma nufacture

and including periodical inspection of the m anufacturer s wo rks in accordance with the certification m ark sc heme of BSI.

Further particulars of the terms of licence may be obtained from the Quality Assurance Department, British Standards

Institution, Maylands Avenue, Hemel Hemp stead, Herts. HP2

4SQ.

This British Standard, having been approved by the Shipbuilding and Marine Indu stry Stand ards Committe e, was published und er

the authority of th e Executive Board on 28 November 1975.

ritish Standards Institution, 1975

ISBN:

580 08616 X

Copyright

Users of British S tanda rds are reminded th at wp yrig ht subsists in all BSI publications. No part of this publication may be

reproduced in any form without the prior permission in writing of BSI. This does not preclude the free use, in the course o

implementing th e stand ard, of necessary details such as symbols an d size, fyp e or grad e designations. Enquiries should b e

addressed to the Publications Manager,

101

Pentonville Road, Londo n

N1 9ND

(Telephone

01-837 8801;

Telex

23218).

Contract requirements

Attention is drawn to the fact that this British Standard does not purport to include all the necessary provisions of a contract.

Revision of British Standards

British Standards are revised, when necessary, by the issue either of amendment slips or of revised editions. It i s important that

users of British Standards should ascertain that they are in possession of

t he

latest amendments or editions.

Th e following BSI references relafe

to

the work on this standard:

Comm ittee reference

SME/ó

Draft for comment

73/32104.

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BS MA 55 Lifeboat Winches

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