ISO 1704:2022

INTERNATIONAL ISO
STANDARD 1704
Fourth edition
2022-02
Ships and marine technology — Stud-
link anchor chains
Navires et technologie maritime — Chaînes d'ancre à mailles
étançonnées
Reference number
© ISO 2022
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ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Shape and dimensions .2
4.1 Shape . 2
4.2 Dimensions . 2
4.2.1 General . 2
4.2.2 Enlarged links . 2
4.2.3 Common stud links and enlarged links. 2
4.2.4 End links . 3
4.2.5 Shackle retaining pin . 3
5 Tolerances . 3
5.1 Common stud links . 3
5.2 Length of five links . 4
5.3 All other dimensions . 4
6 Grade of the anchor chain . 4
7 Connections . 4
7.1 General . 4
7.2 Nominal dimensions and shape of common links . 4
7.3 Nominal dimensions and shape of enlarged links . 6
7.4 Nominal dimensions and shape of end links. 7
7.5 Nominal dimensions and shape of D type joining shackles . 9
7.6 Nominal dimensions and shape of Kenter type joining shackles .12
7.7 Nominal dimensions and shape of end shackle . 15
7.8 Nominal dimensions and shape of swivel . 18
7.9 Nominal dimensions and shape of Type A swivel shackles . 21
7.10 Nominal dimensions and shape of Type B swivel shackles . 23
8 Designation of the size .29
9 Material requirements .30
9.1 Mechanical properties . 30
9.2 Breaking load .30
10 Loading methods .32
10.1 Test condition . 32
10.2 Breaking load . 32
10.3 Proof load . 32
10.4 Dimensions and tolerance . 33
11 Marking . .33
11.1 Position . 33
11.2 Information provided .34
iii
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
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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
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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.
This fourth edition cancels and replaces the third edition (ISO 1704:2008), which has been technically
revised.
The main changes are as follows:
— grade 4 stud-link anchor chain with higher strength has been defined in Table 1 and mechanical
properties have been specified in Clause 9;
— the terms and definitions of swivel shackles have been added in 3.8;
— tolerances on the nominal diameter of the links have been adjusted properly in Clause 5;
— the nominal dimensions of the enlarged link, end link, D type joining shackle and Kenter type joining
shackle have been adjusted properly in Tables 3, 4, 5 and 6;
— the nominal diameters and shape of Type A and Type B swivel shackles have been added in 7.9 and
7.10;
— the sketch examples of connecting chain-shots with joining shackle and examples of connecting
outboard chain-shot to anchor and chain end shot have been added in Figures 11 and 12;
— information on requirements for anchor chains, designation of size, material requirement, loading
methods and marking has been added in Clauses 8, 9 10 and 11;
— incorrect dimensions in Table 3 of ISO 1704:2008 have been corrected.
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
INTERNATIONAL STANDARD ISO 1704:2022(E)
Ships and marine technology — Stud-link anchor chains
1 Scope
This document specifies the shape, proportions, dimensions and tolerances of the component parts of
stud-link anchor chains.
NOTE Statutory requirements, rules and regulations can be applicable to the individual ships concerned.
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 2093:1986, Electroplated coatings of tin — Specification and test methods
ISO 2339, Taper pins, unhardened
3 Terms and definitions
For the purposes of this document, the following terms and definitions 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
chain-shots
component of an anchor chain consisting of common links (3.2) and joining shackles (3.5) with a given
nominal length (e.g. 27,5 m or 25 m)
3.2
common link
basic link of which a chain-shot (3.1) consists
3.3
enlarged link
strengthened link connecting a common link (3.2) and an end link (3.4) in case of connecting chain-shots
with a D type joining shackle (3.5), or connecting a common link and a swivel
3.4
end link
strengthened link attached to the ends of two chain-shots (3.1) in case of connecting chain-shots with a
D type joining shackle (3.5), or connecting an outboard chain-shot with an end shackle
3.5
joining shackle
shackle used for connecting chain-shots (3.1)
Note 1 to entry: Joining shackles can be of D-type or Kenter type.
3.6
end shackle
enlarged shackle used for connecting the outboard chain-shot to the anchor
3.7
swivel
movable component of the outboard chain-shot that prevents excessive twisting of the chain cable
3.8
swivel shackle
shackle fastened to the anchor shackle or anchor shank with the same function as a swivel
3.9
outboard chain-shot
additional short chain-shot fastened to the anchor shackle or anchor, including common link (3.2)
enlarged link (3.3), end shackle (3.6) or swivel shackle (3.8)
3.10
chain end shot
chain-shot fastened to the cable clench, including end link (3.4), enlarged link (3.3) and common link (3.2)
3.11
nominal size
nominal diameter of the common link (3.2)
4 Sh
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