ISO 24059:2021

INTERNATIONAL ISO
STANDARD 24059
First edition
2021-10
Ships and marine technology —
Anchor chain releasers
Navires et technologie maritime — Systèmes de détente pour chaînes
d'ancre
Reference number
© ISO 2021
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ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification, structures and main dimensions . 1
4.1 Classification . 1
4.2 Structure and main dimensions . . 2
5 Requirements . 7
5.1 Materials . 7
5.2 External appearance . 7
5.3 Operational performance. 7
5.4 Derusting . 7
5.5 Tolerance . 7
5.6 Strength . 7
5.7 Tightness . 8
6 Test methods . 8
6.1 Materials . 8
6.2 External appearance . 8
6.3 Operational performance. 8
6.4 Derusting . 8
6.5 Tolerance . 8
6.6 Strength . 8
6.7 Tightness . 8
7 Marking . . 9
8 Signs . 9
Annex A (normative) Strength calculations .10
Bibliography .13
iii
Foreword
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This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 4, Outfitting and deck machinery.
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iv
INTERNATIONAL STANDARD ISO 24059:2021(E)
Ships and marine technology — Anchor chain releasers
1 Scope
This document provides a classification of anchor chain releasers and a description of their structure.
It also specifies their basic dimensions, requirements and test methods, and their marking and surface
signs.
It is applicable to the design, production and acceptance of anchor chain releasers.
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 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications
ISO 3828, Shipbuilding and marine structures — Deck machinery — Vocabulary and symbols
ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual
assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates
and of steel substrates after overall removal of previous coatings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 3828 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/
4 Classification, structures and main dimensions
4.1 Classification
Anchor chain releasers are classified into the types shown in Table 1, based on their structure and
application.
Table 1 — Types and parameters of anchor chain releasers
Nominal size
No. Classification Type code Application
mm
1 Tongue anchor chain releaser A 36 to 152
Grade 3 anchor chains
2 Plug type anchor chain releaser B 50 to 120 of the sizes specified in
ISO 1704
3 Plug type anchor chain releaser C 50 to 120
4.2 Structure and main dimensions
4.2.1 The structure and main dimensions of Type A anchor chain releasers are shown in Figure 1 and
Table 2.
Key
1 trunk 5 reinforced stiffener 9 cover 13 spring washer 16 securing nut
2 chain hook 6 securing buckle 10 handle 14 tongued pin 17 reinforced bracket
3 liner 7 flange 11 hexagon bolt 15 packing 18 instructions plate
4 threaded shaft 8 gasket 12 hexagon nut
Figure 1 — Structure of Type A anchor chain releasers
Table 2 — Main dimensions of Type A anchor chain releasers
Dimensions in millimetres
Theoretic
Chain
mass
L L L × t L D D D × t D M m n × d
1 2 3 2 4 1 2 3 1 4 1
diameter
kg
36 to 46 735 342 150 × 36 119 375 325 273 × 13 360 Tr60 × 4 110 12 × ø 18 79
48 to 56 835 378 174 × 50 131 440 390 325 × 14 410 Tr70 × 4 134 12 ×
...