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 × ø 22 114
58 to 68 995 455 212 × 55 177 540 480 406 × 16 460 Tr75 × 4 172 16 × ø 22 188
Table 2 (continued)
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
70 to 81 551 286 × 70 470 Tr90 × 4 206 312
1 245 227 645 585 508 × 18
84 to 92 508 302 × 85 525 Tr100 × 4 222 342
20 × ø 22
95 to 105 598 337 × 95 535 Tr110 × 12 257 495
1 430 272 754 694 610 × 20
107 to 114 563 366 × 110 620 Tr115 × 12 266 535
117 to 127 1 615 653 398 × 120 312 856 786 711 × 22 630 Tr125 × 12 298 737
24 × ø 22
130 to 137 1 790 744 438 × 130 334 958 885 813 × 22 640 Tr135 × 12 338 962
142 to 152 1 970 822 472 × 140 370 1 060 990 914 × 25 730 Tr145 × 12 372 28 × ø 22 1 308
4.2.2 The structure and main dimensions of Type B anchor chain releasers are shown in Figure 2 and
Table 3.
Dimensions in millimetres
Key
1 body 4 check pin 7 packing gland 10 stud bolt 13 hexagon bolt
2 cover 5 stopper 8 packing 11 hexagon nut 14 hexagon nut
3 pin 6 split pin 9 stop plate 12 gasket
a
For ϕ 52 to 60.
b
For ϕ 64 to 120.
Figure 2 — Structure of Type B anchor chain releasers
Table 3 — Main dimensions of Type B anchor chain releasers
Dimensions in millimetres
Theo-
Nom-
retic
Chain
inal L L L l B B B D D H H t t N
1 2 3 1 1 2 3 1 2 1 2 1 2 mass
diameter
size
kg
52 50 to 52 384 270 460 256 64 238 114 54 112 63 82 14 10 10 41
56 54 to 56 420 296 486 272 68 246 122 58 120 69 88 14 12 10 48
60 58 to 60 448 314 504 288 72 254 130 62 128 74 94 14 14 14 54
64 62 to 64 478 334 524 308 78 264 138 66 136 80 100 14 16 14 60
68 66 to 68 504 352 542 322 82 272 148 70 144 84 107 16 16 14 71
73 70 to 73 540 380 570 348 88 282 156 75 154 87 114 16 18 14 81
Table 3 (continued)
Theo-
Nom-
retic
Chain
inal L L L l B B B D D H H t t N
1 2 3 1 1 2 3 1 2 1 2 1 2 mass
diameter
size
kg
78 76 to 78 576 404 594 368 94 292 166 80 164 95 122 16 20 14 93
84 81 to 84 624 438 628 388 100 302 178 85 174 102 131 16 22 14 106
90 87 to 90 670 470 660 414 106 316 190 90 184 110 140 18 24 14 128
95 92 to 95 708 496 686 442 112 330 200 95 194 118 148 18 28 14 146
102 98 to 102 762 534 724 478 120 346 212 100 206 128 158 22 28 14 188
111 105 to 111 828 580 770 512 130 364 230 110 224 139 171 24 30 18 231
120 114 to 120 892 620 810 556 140 386 246 120 242 150 184 24 36 18 274
4.2.3 The structure and main dimensions of Type C anchor chain releasers are shown in Figure 3 and
Table 4. Where it is forbidden to use port state control (PSC) with butterfly nuts for locking, Type C
shall not be selected.
Dimensions in
...