STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

564 Drilling and Well Completions
Table 4-11
Weiaht of Zinc Coatina for Galvanized Row Wire 1121
(1) (2) (3) (4)
Minimum Weight
DiamterOfWirt
of Zinc Coating
in. mm dft2 ktw
0.028 to 0.047 0.71 to 1.19 0.20 0.06
0.048 to 0.054 1.22 to 1.37 0.40 0.12
0.055 to 0.063 1.4oto 1.60 0.50 0.15
0.064 to 0.079 1.63 to 201 0.60 0.18
0.080 to 0.092 203 to 2.34 0.70 0.21
0.093 and larga 2.36 and 1- 0.80 0.24
Table 4-12
Weight of Zinc Coating for
Drawn-Galvanized Rope Wire [12]
(1) (2) (3) (4)
Diameter of wm
Minimum Weight
of zinc coaling
in. mm ozJft2 kl@
0.018 to 0.028 0.46 to 0.71 0.10 0.03
0.029 to 0.060 0.74 to 1.52 0.20 0.06
0.061 to 0.090 1.55 to 2.29 0.30 0.09
0.091 too.140 2.31 to 3.56 0.40 0.12
wire rope; such sample must be new or in an unused condition. The total wire
number to be tested shall be equal to the number of wires in any one strand,
and the wires shall be selected from all strands of the rope. The specimens shall
be selected from all locations or positions so that they would constitute a
compIete composite strand exactly similar to a regular strand in the rope. The
specimen for all "like-positioned" (wires symmetrically placed in a strand) wires
to be selected so as to use as nearly as possible an equal number from each strand.
Any unsymmetrically placed wires, or marker wires, are to be disregarded
entirely. Center wires are subject to the same stipulations that apply to symmetrical
wires.
Selection and testing of wire prior to rope fabrication will be adequate to ensure
the after-fabrication wire rope breaking strength and wire requirements can be met.
Prior to fabrication, wire tests should meet the requirements of Table 410.
Conduct of Tests. The test results of each test on any one specimen should
be associated and may be studied separately from other specimens.
If, when making any individual wire test on any wire, the first specimen fails,
not more than two additional specimens from the same wire shall be tested.
The average of any two tests showing failure or acceptance shall be used as the
value to represent the wire. The test for the rope may be terminated at any time
sufficient failures have occurred to be the cause for rejection.