ISO 1704:2008
(Main)Ships and marine technology — Stud-link anchor chains
Ships and marine technology — Stud-link anchor chains
ISO 1704:2008 specifies the shape, proportions, dimensions and tolerances of the component parts of stud-link anchor chains. Any statutory requirements, rules and regulations applicable to the individual ship concerned also apply.
Navires et technologie maritime — Chaînes d'ancre à mailles étançonnées
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 1704
Third edition
2008-03-01
Ships and marine technology — Stud-link
anchor chains
Navires et technologie maritime — Chaînes d'ancre à mailles
étançonnées
Reference number
ISO 1704:2008(E)
©
ISO 2008
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ISO 1704:2008(E)
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ISO 1704:2008(E)
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
5 Tolerances . 3
5.1 Nominal diameter of common stud links .3
5.2 Length of five links . 3
5.3 All other dimensions . 3
6 Range of sizes of links and shackles . 4
7 Designation of size . 4
8 Connections . 4
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ISO 1704:2008(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 1704 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee
SC 4, Outfitting and deck machinery.
This third edition cancels and replaces the second edition (ISO 1704:1991) which has been technically revised
as follows.
⎯ Tolerances on the nominal diameter of the links remain the same, but tolerances on other parts of the
links have been appropriately adjusted.
⎯ Lengths and tolerances of the combined links have been increased.
⎯ The allowable manufacturing tolerance of all other dimensions has been increased.
⎯ The nominal diameter of a common stud link is shown by d and the diameter of other links, shackles and
swivels given as multiples of d.
⎯ The swivel type and a series of its dimensions have been added for the convenience of the user. The
patented swivel or the swivel with a particular function can be used as a substitute if this is possible in
harmony with this International Standard.
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INTERNATIONAL STANDARD ISO 1704:2008(E)
Ships and marine technology — Stud-link anchor chains
1 Scope
This International Standard specifies the shape, proportions, dimensions and tolerances of the component
parts of stud-link anchor chains.
Any statutory requirements, rules and regulations applicable to the individual ship concerned also apply.
2 Normative references
The following referenced documents are indispensable for the application 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 2339:1986, Taper pins, unhardened
ISO 3828:1984, Shipbuilding and marine structures — Deck machinery — Vocabulary
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
chain-shot
component of an anchor chain consisting of common stud links and joining shackles with a given nominal
length (27,5 m or 25 m) in accordance with ISO 3828
3.2
common stud link
basic link of which chain-shot consists
3.3
enlarged stud link
strengthened link that connects a common stud link and the end link, in the case of connecting chain-shots,
with a “D” type joining shackle, or connects a common stud link and swivel
3.4
end link
strengthened link that is attached to the ends of chain-shots, in the case of connecting chain-shots, with
“D” type joining shackles or the outboard chain-shot with an end shackle
3.5
joining shackle
“D” type joining shackle or Kenter type joining shackle used for connecting chain-shots
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ISO 1704:2008(E)
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 which prevents excessive twisting of the chain cable
3.8
outboard chain-shot
additional short chain-shot fastened to the anchor shackle
3.9
nominal size
nominal diameter of the common stud link
4 Shape and dimensions
4.1 Shape
The stud links, shackles and component parts shall be of the shapes and proportions shown in Figures 1 to 9.
4.2 Dimensions
4.2.1 General
The dimensions of stud links, shackles and component parts shall be in accordance with the values given in
Tables 1 to 7.
The nominal diameter, d, is a design diameter measured at the crown of a common stud link as an average
value of two measurements perpendicular to each other. See Figure 1 and Table 1.
All dimensions, based on the nominal diameters, d, of the common stud links, shall be measured after the
chain and shackles have been subjected to the statutory proof loads.
4.2.2 Enlarged stud links
The proportions of the enlarged stud links are the same as those of the common stud links. The nominal
diameter of the enlarged stud link is 10 % larger than the nominal diameter of the common stud link: d = 1,1 d,
1
the calculated values are rounded to the nearest nominal diameter of the common link.
4.2.3 Common stud links and enlarged stud links
The inside diameter of common stud links and enlarged stud links shall be sufficient to allow each link to bed
properly and work freely. See Figures 1 and 2.
4.2.4 End links
The inside diameter of end links shall be sufficient to allow the shackle link to bed properly and work freely.
See Figure 3. The nominal diameter of the end link is 20 % larger than the nominal diameter of the common
stud link: d = 1,2 d, the calculated values are rounded to the nearest nominal diameter of the common link.
2
4.2.5 Shackle retaining pin
The retaining pin used in “D” type joining shackles and end shackles shall be a taper pin having a taper of not
less than 1:50 and not more than 1:16 on the diameter.
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ISO 1704:2008(E)
The retaining pin used in Kenter type shackles shall be a taper pin having a taper of not less than 1:50 and not
more than 1:32 on the diameter. The nominal diameter of the taper pin shall be 0,37 × d, the calculated values
are rounded to the nearest standardized nominal diameter in accordance with ISO 2339. The nominal length
of the taper pin shall be (w − 2) × nominal diameter to taper pin (see Figure 5), the calculated values are
4
rounded to the nearest standardized nominal length in accordance with ISO 2339.
Nominal sizes and lengths required are given in Tables 4, 5 and 6. Other details of the taper pins, e.g. end
radius, cone tolerance and surface finish, shall be in accordance with ISO 2339.
Taper pins shall be either of stainless steel or tin-coated carbon steel. If tin-coated, this shall be either by a
hot-dip process or electroplating in accordance with ISO 2093:1986, 7.1, service condition 4.
5 Tolerances
5.1 Nominal diameter of common stud links
The allowable manufacturing tolerances on the nominal diameter d of the common stud links, measured at the
crown, are
0
⎯ mm for d u 40 mm;
−1
0
⎯ mm for 40 mm < d u 84 mm;
−2
0
⎯ mm for 84 mm < d u 122 mm;
−3
0
⎯ mm for d > 122 mm.
−4
The cross-sectional area at the crown of the link shall be not less than the area of a circle of the nominal
diameter.
+5
The allowable manufacturing tolerance on the nominal diameter measured elsewhere on the link is %.
0
The tolerance on the stud-link welded parts is +15 %.
The allowable manufacturing tolerance of the link except for the requirements specified above is ± 2,5 %,
taking into account the fact that all components of the anchor chain shall fit in with each other.
5.2 Length of five links
The length of five links is defined as 5 × p + 2 d = 22 d. The measurement is taken from the outside.
+2,5
The allowable manufacturing tolerance on a length of five links is %.
0
5.3 All other dimensions
+5
The tolerances of the diameter: %
0
The tolerances other than diameter: ± 2,5 %.
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ISO 1704:2008(E)
6 Range of sizes of links and shackles
The range of nominal diameter, d, is that specified by the classification societies associated in the
International Association of Classification Societies (IACS).
7 Designation of size
The nominal size of a common stud link is designated its nominal diameter, d.
The nominal size of other links, shackles and swivels is designated by the nominal diameter, d, of the common
stud link.
The nominal size of a stud-link anchor chain is designated by the nominal diameter of the common stud link.
8 Connections
Examples in the use of connecting chain-shots with joining shackle are shown in Figure 8.
Examples in the use of connecting chain outboard shot to anchor is shown in Figure 9.
Key
d = nominal diameter of common stud link
l = 6 d
p = 4 d
w = 3,6 d
NOTE For nominal dimensions, see Table 1.
Figure 1 — Common stud link
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ISO 1704:2008(E)
Table 1 — Nominal dimensions of common stud link
Dimensions in millimetres
Nominal size Nominal size
l p w l p w
d d
70 420 280 252
12,5 75 50 45
14 84 56 50 73 438 292 263
16 96 64 58
76 456 304 274
17,5 105 70 63
78 468 312 281
19 114 76 68
81 486 324 292
20,5 123 82 74
84 504 336 302
22 132 88 79
24 144 96 86
87 522 348 313
90 540 360 324
26 156 104 94
92 552 368 331
28 168 112 101
95 570 380 342
30 180 120 108
32 192 128 115
97 582 388 349
34 204 136 122
100 600 400 360
102 612 408 367
36 216 144 130
105 630 420 378
38 228 152 137
107 642 428 385
40 240 160 144
42 252 168 151
111 666 444 400
44 264 176 158
114 684 456 410
117 702 468 421
46 276 184 166
120 720 480 432
48 288 192 173
50 300 200 180
122 732 488 439
52 312 208 187
124 744 496 446
54 324 216 194
127 762 508 457
130 780 520 468
56 336 224 202
132 792 528 475
58 348 232 209
60 360 240 216
137 822 548 493
62 372 248 223
142 852 568 511
64 384 256 230
147 882 588 529
152 912 608 547
66 396 264 238 157 942 628 565
68 408 272 245 162 972 648 583
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ISO 1704:2008(E)
Key
d = nominal diameter of common stud link
d = nominal diameter of enlarged stud link = 1,1 d
1
l = 6 d ≈ 6,6 d
1
1
p = 4 d ≈ 4,4 d
1
1
w = 3,6 d ≈ 3,96 d
1 1
NOTE For nominal dimensions, see Table 2.
Figure 2 — Enlarged stud link
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ISO 1704:2008(E)
Table 2 — Nominal dimensions of enlarged stud link
Dimensions in millimetres
Nominal size Nominal size
d l p w d l p w
(d, common (d, common
1 1 1 1 1 1 1 1
stud link) stud link)
70 78 468 312 281
12,5 14 84 56 50
73 81 486 324 292
14 16 96 64 58
16 17.5 105 70 63
76 84 504 336 302
17,5 19 114 76 68
78 87 510 340 306
19 20.5 123 82 74
81 90 540 360 324
20,5 22 132 88 79
84 92 552 368 331
22 24 144 96 86
24 26 156 104 94
87 97 582 388 349
90 100 600 400 360
26 28 168 112 101
92 102 612 408 367
28 30 180 120 108
95 105 630 420 378
30 34 204 136 122
32 36 216 144 130
97 107 642 428 385
34 38 228 152 137
100 111 666 444 400
102 111 672 448 403
36 40 240 160 144
105 114 684 456 410
38 42 252 168 151
107 117 702 468 421
40 44 264 176 158
42 46 276 184 166
111 122 732 488 439
44 48 288 192 173
114 124 744 496 446
117 130 780 520 468
46 50 300 200 180
120 132 792 528 475
48 54 324 216 194
50 56 336 224 202
122 137 822 548 493
52 58 348 232 209
124 137 822 548 493
54 60 360 240 216
127 142 852 568 511
130 142 852 568 511
56 62 372 248 223
132 147 882 588 529
58 64 384 256 230
60 66 396 264 238
137 152 912 608 547
62 68 408 272 245
142 157 942 628 565
64 70 420 280 252
147 162 972 648 583
152 167 1 002 668 601
157 173 1 038 692 623
66 73 438 292 263
68 76 456 304 274 162 178 1 068 712 641
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ISO 1704:2008(E)
Key
d = nominal diameter of common stud link
d = nominal diameter of end link = 1,2 d (d = 1,2 d)
2 2
l = p + 2 d = 6,75 d
2 2 2
p = 3,65 d ≈ 4,35 d
2 2
w = 3,3 d ≈ 4 d
2 2
NOTE For nominal
...
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