Ships and marine technology — Adjustable roller-type chain stoppers

This document specifies requirements for the design, strength, safety, function and operation of adjustable roller-type chain stoppers. It also specifies their structure, materials, acceptance and marking. It is applicable to the design, manufacture and acceptance of adjustable roller-type chain stoppers.

Navires et technologie maritime — Bosses de chaînes à rouleaux ajustables

General Information

Status
Published
Publication Date
12-Oct-2021
Current Stage
6060 - International Standard published
Start Date
13-Oct-2021
Completion Date
13-Oct-2021
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INTERNATIONAL ISO
STANDARD 24045
First edition
2021-10
Ships and marine technology —
Adjustable roller-type chain stoppers
Navires et technologie maritime — Bosses de chaînes à rouleaux
ajustables
Reference number
ISO 24045:2021(E)
© ISO 2021
---------------------- Page: 1 ----------------------
ISO 24045:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on

the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below

or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 24045:2021(E)
Contents Page

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

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

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

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

4 Design, strength and safety requirements .............................................................................................................................. 2

5 Function and operation requirements ......................................................................................................................................... 2

6 Structure ...................................................................................................................................................................................................................... 3

7 Materials ....................................................................................................................................................................................................................... 6

8 Acceptance .................................................................................................................................................................................................................. 7

9 Marking ........................................................................................................................................... ............................................................................... 7

Annex A (normative) Strength calculations of adjustable roller-type chain stoppers ..................................8

Annex B (informative) Precautions for manufacturers of adjustable roller-type

chain stopper ........................................................................................................................................................................................................14

iii
© ISO 2021 – All rights reserved
---------------------- Page: 3 ----------------------
ISO 24045:2021(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 of 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

www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,

Subcommittee SC 4, Outfitting and deck machinery.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www.iso.org/members.html.
© ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 24045:2021(E)
Ships and marine technology — Adjustable roller-type
chain stoppers
1 Scope

This document specifies requirements for the design, strength, safety, function and operation of

adjustable roller-type chain stoppers. It also specifies their structure, materials, acceptance and

marking.

It is applicable to the design, manufacture and acceptance of adjustable roller-type chain stoppers.

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

ISO 4568, Shipbuilding — Sea-going vessels — Windlass and anchor capstan
ISO 6325, Shipbuilding — Cable stoppers
ISO 7825, Shipbuilding — Deck machinery — General requirements
3 Terms and definitions

For the purpose of this document, the terms and definitions given in ISO 3828 and ISO 4568 and the

following apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
adjustable roller-type chain stopper

device fixed to the ship structure, separated from the gypsy wheel and used for fixing the anchor chain

and for bearing the anchor tension

Note 1 to entry: After being installed on the ship structure, the position of the lever can be adjusted according to

the stowing condition of the anchor chain to achieve a better stowing effect. It can guide the anchor chain. When

the anchor chain passes on the chain guide groove and the roller, the anchor chain can be guided.

3.2
right-hand adjustable roller-type chain stopper

adjustable roller-type chain stopper that is opened and fixed on the right-hand side, when viewed from

the gypsy wheel to the chain stopper
© ISO 2021 – All rights reserved
---------------------- Page: 5 ----------------------
ISO 24045:2021(E)
3.3
left-hand adjustable roller-type chain stopper

adjustable roller-type chain stopper that is opened and fixed on the left-hand side, when viewed from

the gypsy wheel to the chain stopper
4 Design, strength and safety requirements

4.1 The adjustable roller-type chain stopper shall be designed and manufactured to withstand

a load without permanent deformation in accordance with the requirements of ISO 6325 for Class A

cable stoppers. The load shall be 80 % of the nominal breaking load of the anchor chain corresponding

diameter.

4.2 The nominal sizes of the anchor chain shall be in accordance with ISO 1704, Grade 3.

4.3 Adjustable roller-type chain stoppers shall meet the general requirements of ISO 7825 for deck

machinery and the specific requirements of 4.4 and 4.5.

4.4 The design stress of the load specified in 4.1 shall not exceed the yield stress of the material used.

The adjustable roller-type chain stopper shall be designed to prevent the generation of high bending

moments in the chain link. The strength calculations for adjustable roller-type chain stoppers shall be

according to Annex A.

4.5 The lever of the adjustable roller-type chain stopper shall be able to reliably and effectively

prevent itself from gradually moving to the open position when it is at the closed position, to avoid

releasing and throwing out the anchor chain. It shall be possible to operate the lever conveniently and

to fix it reliably when at the open position.

4.6 Precautions for manufacturers of adjustable roller-type chain stoppers are given in Annex B.

5 Function and operation requirements

5.1 The adjustable roller-type chain stopper shall be installed between the windlass and the hawse

pipe, which can effectively control the anchor chain during ship navigation, lock the anchor chain during

ship anchoring, and can bear 80 % of the nominal breaking load of the corresponding anchor chain.

5.2 The operation of the adjustable roller-type chain stopper shall be convenient and safe. Locking

devices shall be installed on parts that can cause danger to the operator due to unintentional actions.

5.3 Under no load, it shall be possible to manually operate the adjustable roller-type chain stopper.

The operating force of an anchor chain with a diameter of less than 84 mm shall not exceed 350 N, and

that of an anchor chain with a diameter of 84 mm or above shall not exceed 500 N.

© ISO 2021 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 24045:2021(E)
6 Structure

6.1 The structure of adjustable roller-type chain stoppers is shown in Figure 1, and their main

dimensions are given in Table 1.
Key
1 support 10 washer
2 roller 11 cotter pin
3 bushing 12 balance weight
4 shaft 13 adjust block
5 oil cup 14 stop plate
6 chain guide groove 15 bolts
7 lever 16 balance weight fixed seat
8 pin 17 tonguing pin
9 pin shaft

NOTE The figure shows a left-hand adjustable roller-type chain stopper, to which the right-hand type is

symmetrical.
Figure 1 — Structure of adjustable roller-type chain stoppers
Table 1 — Main dimensions of adjustable roller-type chain stoppers
Anchor a
B B D d d L L L L H H T Mass
Nominal 1 1 1 2 3 1
chain
size
mm mm mm mm mm mm mm mm mm mm mm mm kg
size
52 50 to 52 306 850 560 170 300 1 060 340 110 125 480 910 20 ~1 340
56 54 to 56 326 896 600 185 310 1 120 365 115 135 540 980 20 ~1 700
60 58 to 60 348 948 640 195 320 1 220 390 125 150 600 1 010 20 ~2 100

When α + β > 35°, the diameter of the shaft can be reduced appropriately, which needs to be determined according to

calculation.

The dimensions in the table are for reference only and should be based on the results o

...

INTERNATIONAL ISO
STANDARD 24045
First edition
Ships and marine technology —
Adjustable roller-type chain stoppers
PROOF/ÉPREUVE
Reference number
ISO 24045:2021(E)
ISO 2021
---------------------- Page: 1 ----------------------
ISO 24045:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 24045:2021(E)
Contents Page

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

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

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

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

4 Design, strength and safety requirements ................................................................................................................................ 2

5 Function and operation requirements .......................................................................................................................................... 2

6 Structure ....................................................................................................................................................................................................................... 3

7 Materials ....................................................................................................................................................................................................................... 6

8 Acceptance .................................................................................................................................................................................................................. 7

9 Marking .......................................................................................................................................................................................................................... 7

Annex A (normative) Strength calculations of adjustable roller-type chain stoppers .....................................8

Annex B (informative) Precautions for manufacturers of adjustable roller-type chain stopper .......14

© ISO 2021 – All rights reserved PROOF/ÉPREUVE iii
---------------------- Page: 3 ----------------------
ISO 24045:2021(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 of 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 www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,

Subcommittee SC 4, Outfitting and deck machinery.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 24045:2021(E)
Ships and marine technology — Adjustable roller-type
chain stopper
1 Scope

This document specifies requirements for the design, strength, safety, function and operation of

adjustable roller-type chain stoppers. It also specifies their structure, materials, acceptance and

marking.

It is applicable to the design, manufacture and acceptance of adjustable roller-type chain stoppers.

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

ISO 4568, Shipbuilding — Sea-going vessels — Windlass and anchor capstan
ISO 6325, Shipbuilding — Cable stoppers
ISO 7825, Shipbuilding — Deck machinery — General requirements
3 Terms and definitions

For the purpose of this document, the terms and definitions given in ISO 3828 and ISO 4568 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
adjustable roller-type chain stopper

device fixed to the ship structure, separated from the gypsy wheel and used for fixing the anchor chain

and for bearing the anchor tension

Note 1 to entry: After being installed on the ship structure, the position of the lever can be adjusted according to

the stowing condition of the anchor chain to achieve a better stowing effect. It can guide the anchor chain. When

the anchor chain passes on the chain guide groove and the roller, the anchor chain can be guided.

3.2
right-hand adjustable roller-type chain stopper

adjustable roller-type chain stopper that is opened and fixed on the right-hand side, when viewed from

the gypsy wheel to the chain stopper
© ISO 2021 – All rights reserved PROOF/ÉPREUVE 1
---------------------- Page: 5 ----------------------
ISO 24045:2021(E)
3.3
left-hand adjustable roller-type chain stopper

adjustable roller-type chain stopper that is opened and fixed on the left-hand side, when viewed from

the gypsy wheel to the chain stopper
4 Design, strength and safety requirements

4.1 The adjustable roller-type chain stopper shall be designed and manufactured to withstand

a load without permanent deformation in accordance with the requirements of ISO 6325 for Class A

cable stoppers. The load shall be 80 % of the nominal breaking load of the anchor chain corresponding

diameter.

4.2 The nominal sizes of the anchor chain shall be in accordance with ISO 1704, Grade 3.

4.3 Adjustable roller-type chain stoppers shall meet the general requirements of ISO 7825 for deck

machinery and the specific requirements of 4.4 and 4.5.

4.4 The design stress of the load specified in 4.1 shall not exceed the yield stress of the material used.

The adjustable roller-type chain stopper shall be designed to prevent the generation of high bending

moments in the chain link. The strength calculations for adjustable roller-type chain stoppers shall be

according to Annex A.

4.5 The lever of the adjustable roller-type chain stopper shall be able to reliably and effectively prevent

itself from gradually moving to the open position when it is at the closed position, to avoid releasing and

throwing out the anchor chain. It shall be possible to operate the lever conveniently and to fix it reliably

when at the open position.

4.6 Precautions for manufacturers of adjustable roller-type chain stoppers are given in Annex B.

5 Function and operation requirements

5.1 The adjustable roller-type chain stopper shall be installed between the windlass and the hawse

pipe, which can effectively control the anchor chain during ship navigation, lock the anchor chain during

ship anchoring, and can bear 80 % of the nominal breaking load of the corresponding anchor chain.

5.2 The operation of the adjustable roller-type chain stopper shall be convenient and safe. Locking

devices shall be installed on parts that can cause danger to the operator due to unintentional actions.

5.3 Under no load, it shall be possible to manually operate the adjustable roller-type chain stopper.

The operating force of an anchor chain with a diameter of less than 84 mm shall not exceed 350 N, and

that of an anchor chain with a diameter of 84 mm or above shall not exceed 500 N.

2 PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 24045:2021(E)
6 Structure

6.1 The structure of adjustable roller-type chain stoppers is shown in Figure 1, and their main

dimensions are given in Table 1.
Key
1 support 10 washer
2 roller 11 cotter pin
3 bushing 12 balance weight
4 shaft 13 adjust block
5 oil cup 14 stop plate
6 chain guide groove 15 bolts
7 lever 16 balance weight fixed seat
8 pin 17 tonguing pin
9 pin shaft

NOTE The figure shows a left-hand adjustable roller-type chain stopper, to which the right-hand type is

symmetrical.
Figure 1 — Structure of adjustable roller-type chain stoppers
Table 1 — Main dimensions of adjustable roller-type chain stoppers
Anchor a
B B D d d L L L L H H T Mass
Nominal 1 1 1 2 3 1
chain
size
mm mm mm mm mm mm mm mm mm mm mm mm kg
size
52 50 to 52 306 850 560 170 300 1 060 340 110 125 480 910 20 ~1 340
56 54 to 56 326 896 600 185 310 1 120 365 115 135 540 980 20 ~1 700
60 58 to 60 348 948 640 195 320 1 220 390 125 150 600 1 010 20 ~2 100

When α + β > 35°, the diameter of the shaft can be reduced appropriately, which needs to be determined according to

calculation.

The dimensions in the table are for reference only and should be based on the results of strength calculation.

© ISO 2021 – All rights reserved PROOF/ÉPREUVE 3
---------------------- Page: 7 ----------------------
ISO 24045:2021(E)
Table 1 (continued)
Anchor a
B B
...

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