ISO/R 40:1957

UDC 672.6: 629.122/.123
Ref. No.: ISO/R 40 - 1957 (E)
IS0
I NTE R N AT1 O N AL O R GAN I2 AT1 O N FO R STAN DAR D I ZATl O N
IS0 RECOMMENDATION
R 40
SHIPBUILDING DETAILS FOR SEA NAVIGATION
AND INLAND NAVIGATION
ANCHOR CHAINS
Studless Links
lst EDITION
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belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid slandard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.

ISO/R 40 - 1957 (E)
IS0 Recommendation R 40 May 1957
SHIPBUILDING DETAILS FOR SEA NAVIGATION AND INLAND NAVIGATION
ANCHOR CHAINS
Studless Links
A = nominal dimension of the link
I. DIMENSIONS
d = diameter
d' = millimetre value of A
2 values:
d" = inch value of A trans-
C
posed into rounded off
millimetre value
d' + du d' + d"
B=5- Bl=B-2p
2 2
d' + d"
c 3.4 ___---
Example for A = 20.5 mm or 13/la inch:
20.5 + 20.6
B=5 = 103 mm (rounded off)
20'5
20'6 = 62 mm (rounded off)
Bl=I03-2
20.5 + 20.6
c = 3.4 = 70 mm (rounded off)
d
B C
A
d' d"
mm inches mm mm mm mm mm
6* 6 6.4 31 19 21
'14 *
8* 8 7.9 40 24
5116*
10* 9.5 49 29 33
3i8 *
11 11 11.1 55 33 38
Ils
38 43
12.5 12.5 12.7 63
'I2
14.3 43 49
14.5 14.5 72
Ils
15.9 80 48 54
16 16
5ia
17.5 17.5 17.5 88 53 60
"Ils
19 19 19.1 95 57 65
'14
20.5 20.5 20.6 103 62
Il6
110 66 75
22 22 22.2
7i8
24 24 23.8 120 72 81
Ils
25.5 1 25.5 25.4 127 76
27.0 81 92
27 27 135
1 '116
28.6 86 97
28.5 28.5 143
1 'la
30 30 30.2 150 90 102
1 'Il6
32 32 31.8 160 96 108
1 '14
33 33 33.3 166 100
1 511s
35 35 34.9 175 105
1"s
37 37 36.5 184 110 125
1 'Il6
38 38 38.1 190 114 129
1 '12
40 40 39.7 199 119
1 "Il6
* These dimensions for inland navigation only.
NOTE. - Allowable manufacturing tolerance for the dimensions B, B, and C is f 2 per cent.

lSO/R 40 - 1957 (E)
2. TESTS
Minimum breaking load Minimum proof load
A=d
in tonnes, in tonnes,
calculated for 24 kgfjmm" calculated for I2 kgf/mm**
mm
1.4 0.7
6**
2.4 1.2
8**
10** 3.8 1.9
2.3
11 4.6
5.9 2.9
12.5
14.5 7.9 4.0
16 9.7 4.8
17.5 11.6 5.8
6.8
19 13.6
15.8 7.9
20.5
22 18.2 9.1
10.9
24 21.7
12.3
25.5 24.5
27.5 13.7
28.5 30.6 15.3
17.0
30 33.9
...