Iranian Classification Society Rules

Section 11 Wire Rope

1101. Application

The requirements in this section apply to the tests and inspection for the approval of manufacturing process of wire rope as specified in Pt 4, Ch 8, 503. of the Rules.

1102. Approval tests

1. Selection of test samples

(1) For strand test, a suitable length of a strand is to be cut off the rope and unstranded. The number of wires to be taken therefrom for tests is to be as specified in Table 4.8.12. of Pt 4, Ch 8 of the Rule.

(2) For rope test, one test piece is to be taken suitable length from end of each length of steel wire ropes.

2. Approval tests and acceptance criteria

(1) The approval test is to be carried out on each grade of steel wire ropes under application for each manufacturing factory. The details of approval test are to be as indicated in Table

2.11.1 and the test is to be carried out in the presence of the Surveyor. Provided, however,

approval test is carried out in the presence of inspector of the organization authorized by the Society (officially recognized establishment), the test witnessed by the Surveyor of the Society may be omitted.

(2) Notwithstanding the requirements in the preceding (1), the test may be done by sampling sub- ject to the Society's approval.

(3) Where it is difficult to comply with the test method and evaluation criteria specified in the pre-

ceding (1), the decision may apply to standards (KS D3514 "Wire Rope") authorized by the Society (officially recognized establishment).

Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015 49

Ch 2 Approval of Manufacturing Process Ch 2, Sec 11

Table 2.11.1 Approval Test Items and Acceptance Criteria for wire ropes

Kinds

Test item

Test method

Acceptance criteria

strand test

Diameters and Appearance

(1) The difference between the maximum and minimum diameters of the individual wires is to be measured at any two or more posi- tions by the micro meter

(2) Through the entire length, cross section of individual wires is to be rounded with smooth surface. Individual wires should also be free from defects such as scratch which is detrimental to prac- tical use.

To comply with the Pt 4, Ch 8 of the Rule.

Breaking tests(1)

(1) The test piece is to be set to the testing machine and gradually pulled until break down. The difference between individual breaking load and average value is to be calculated.

(2) The distance between grips is to be 100 mm where the diameter of test piece is less than 1.0 mm, or 200 mm where the diameter of test piece is 1.0 mm and over

The difference between individual breaking load and average value is to be within ± 8 %

Twisting Tests(1)

The test piece with the length 100 times the diameter of the test piece is to be gripped hard at the ends, and then, depending on the twisting speed of each strand, one end is to be revolved until the test piece is broken down. Where they are broken down, the num- ber of times of twisting is to be measured.

To comply with the Pt 4, Ch 8 of the Rule.

Wrapping Tests

The test pieces are to be wrapped at least eight times around the wire with the same diameter as the test piece. Where they are un- wrapped, the number of broken test pieces is to be measured.

Mass of Zinc Coating

To be as deemed appropriate by the Society

To be as deemed appro- priate by the Society

rope test

Diameters and Appearance

(1) The diameter of steel wire ropes is taken as an average diameter measured at any two or more positions except within 1.5 m from the ends of ropes.

(2) Through the entire length, wire ropes should be free from de- fects such as dent, scratch which are detrimental to practical use.

To comply with the Pt 4, Ch 8 of the Rule.

Breaking tests(1)

(1) The test piece of which both ends are either loosened and sol- idified to cone with suitable metal alloy or gripped by other suitable methods, is to be set to the testing machine and gradu- ally pulled until breaks down.

(2) One test piece is to be taken from each length of steel wire ropes.

(3) The distance between the grips is to be set according to the di- ameter of ropes. However, it needs not exceed 2 m.

To comply with the Pt 4, Ch 8 of the Rule.

Notes

(1) Where the test piece has broken down at the parts of the grips before reaching the required breaking load, one more test piece taken from the steel wire rope may be retested.

50 Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015

Ch 2 Approval of Manufacturing Process Ch 2, Sec 12

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