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STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

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Hoisting System 595<br />

Attachment of Clips<br />

The clip method of making wire-rope attachments is widely used. Drop-forged<br />

clips of either the U-bolt or the double-saddle type are recommended. When<br />

properly applied as described herein, the method develops about 80% of the<br />

rope strength in the case of six strand ropes.<br />

When attaching clips, the rope length to be turned back when making a loop<br />

is dependent upon the rope size and the load to be handled. The recommended<br />

lengths, as measured from the thimble base, are given in Table 4-33. The thimble<br />

should first be wired to the rope at the desired point and the rope then bent around<br />

the thimble and temporarily secured by wiring the two rope members together.<br />

Table 4-33<br />

Attachment of Clips [ll]<br />

Length of<br />

Diameter Number Rope Turned<br />

of Rope, of Back, Torque,<br />

in. (mm) Clips in. (mm) ft-lb (Nwn)<br />

2 3% ( 8-9) 4.5 ( 6.1)<br />

2 3%. ( 95) 7.5 ( 10)<br />

2 4% ( 121) 15 ( 20)<br />

2 5% ( 133) 30 ( 41)<br />

2 6% ( 165) 45 ( 61)<br />

2 7 ( 178) 65 ( 88)<br />

3 11% ( 292) 65 ( 88)<br />

3 12 ( 305) 95 ( 129)<br />

3 12 ( 605) 95 ( 129)<br />

4 18 ( 457) 130 ( 176)<br />

4 19 ( 483) 225 ( 305)<br />

5 26 ( 660) 225 ( 305)<br />

6 34 ( 864) 225 ( $05)<br />

7 44 (1117) 360 ( 488)<br />

7 44 (1120) 360 ( 488)<br />

8 54 (1872) 360 ( 488)<br />

8 58 (1473) 430 ( 586)<br />

8 61 (1549) 590 ( 800)<br />

8 71 (1800) 750 (1020)<br />

8 73 (1850) 750 (1020)<br />

9 84 (2130) 750 (1020)<br />

10 100 (2540) 750 (1020)<br />

3 (77) 10 106 (2690) 1200 (1630)<br />

NOTE I: Ij u pulley in uxed in place of a thimhk for turning<br />

buck the rope. udd one additional dip.

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