Iranian Classification Society Rules

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Section 10-2 Marine Chain Accessories


1011. Application


1. The requirements in this Section apply to the tests and inspection for the approval of manufacturing process of the connecting shackles, kenter shackles, anchor shackles and swivels (hereinafter referred to as the "chain accessories") specified in Pt 4, Ch 8, 404. 4 of the Rules.


2. The


requirements in this Section apply to the manufacturing process of the enlarged link and end

link are manufactured by a chain accessories manufacturer other than the manufacturer of the chain.


3. The


manufacturer who makes cast chains in accordance with the requirements of this Section may

be considered to comply with the requirements of manufacturing process in Pt 2, Ch 1, 102. of the Rules.


1012. Data to be submitted

The following reference data in addition to those specified in 102. are to be submitted to the Society including (1) to (5) of 1002.

(1) Cast chain accessories

To be in accordance with the provisions in 1002. (6) (B).

(2) Forged chain accessories

(A) Manufacturing process and facilities

(a)

Explanations on the manufacturing process

(b) Outline of the manufacturing factory Principal

(c)

forging facilities and their capacities

(d) Type and capacity of the furnace for heat treatments

(e)

Inspection and testing facilities

(B) Work standards

(a) Details of acceptance inspection for raw materials (bloom, billet, round bar steel, etc.) and names of their suppliers

(b) Forging procedure (drawings to be attached)

(c)

Heat treatment procedures and their control standards

(d) Details of product inspection


1013. Approval test


1. Approval test


The approval test is to be carried out on each item of chain accessories under application for each manufacturing factory. The details of approval test are to be as indicated in Table 2.10.2 and the test is to be carried out in the presence of the Surveyor unless otherwise specified.


2. Test chain accessories


The test specimens used in the approval test are to be taken from the test chain accessories under application in the presence of the Surveyor.


3. Omission of approval test

(1) When the test for chain accessories of higher grade has been passed, the approval test for man- ufacturing process for chain accessories of the same or of the smaller diameter manufactured by the same casting or forging method may be omitted.

(2) When the test either for swivel or for kenter shackle has been passed, the approval test for manufacturing process for another product not subjected to approval test may be omitted pro- vided that discrimination between the casting procedure and forging procedure is specified.

(3) When the test either for swivel or for kenter shackle has been passed, the approval test for manufacturing process for the enlarged link and end link of the same diameter as that of the swivel and kenter shackle or less may be omitted.

(4) When the test for anchor shackle has been passed, the approval test for manufacturing process of the connecting shackle of the same diameter thereof or less may be omitted.

(5) When the test either for connecting shackle or anchor shackle has been passed, the approval test


Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015 41

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Ch 2 Approval of Manufacturing Process Ch 2, Sec 10-2

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for manufacturing process of the enlarged link and end link of the same diameter there of or less may be omitted.

(6) The diameter of the chain accessories shown in items (1) through (5) above corresponding to

that of the common link to which they are fitted.


1014. Changes in the manufacturing process

Where major changes significantly affecting the manufacturing process already approved have made, the requirements in 1004. are to apply.


been


Table 2.10.2 Approval Test Items and Acceptance Criteria for Marine Chains Accessories



Test item

Numbers of test specimens

Selection of test specimen and details of test specimen


Test procedure


Acceptance criteria


Mechanical properties test of chain accessories

①Tensile test


2


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① and ② : To conform to Pt 2, Ch

1 of the Rules, The bending radius of chain accessories is to be 25mm. And the bending angle is to be not less than fol- lowing angle : 120°.

③ : Testing temperature of impact test is

to be refered to NOTES 6.

④ : To be examined at its surface, 2/3 r

and center (magnifying power : × 100)

⑤ : Areas shown in the figure are to be

macroetched.

⑥ : Sulphur print of the chain accessory

in longitudinal section is to be taken.

⑦ : Hardness distribution in diametric di-

rection is to be measured at proper intervals.

⑧, ⑨, ⑪ : To conform to Pt 4, Ch

8 Sec 4 of the Rules.

⑩ : Measurements of each part of chain

accessories after subjected to proof test are to be taken for dimensions.

To conform to Pt 2, Ch 1 of the Rules.

②Bending test


2

To be free of harmful defects

③Impact test

see NOTES 6

see NOTES 6.


④Micro-test


3

The degree of heat treatment in diametric direction is to be examined.

⑤Macro test


1

To be free of harmful defects.

⑥Sulphur print


1

To be free of harmful defects.

⑦Hardness test

1

For reference only.


Tests on testing object of chain accessories

⑧Proof test


1

To conform to Pt 4, Ch 8 of the Rules.


⑨Breaking test


1

1.1 times of the specified breaking load is omly required to be loaded, and no actual breaking is required.


⑩Dimension inspection


1

To conform to Pt 4, Ch 8 of the Rules. In addition, dimensional changes are to be measured.

⑪Visual in- spection


1

To conform to Pt 4, Ch 8 of the Rules.

NOTES;

1. The test chain accessories used for approval test are to, in principle, be two or three, in number, of the larges diameter under application.

2. The Society, when deemed necessary, may request nondestructive test.

3. In the case of the approval test required in connection with the change in the manufacturing process as shown in 1004., the Society may reduce the re- quirements in the diamter and number of test chain accessories with respect to the test itmes.

4. When any steel materials, manufacturing process or haat treatment not specified in the Rules are intended to be used, the Society may request other test- ing procedure or submission of reference data in addition to those specified in the Rules.

5. Two specimens for each test of tensile test specimens, bending test specimens and Charpy V-notch impact test specimens are to be taken from the test samples specified in Pt 2, Ch 1, 502. & 603. of the Rules, on both cast and forged chain accessories, tested to satisfy the specified values in addition to the mechanical properties tests given in this Table.

6. Temperature of impact test are to be in accordance with following tables.



Kind of chain accessories

Number of test specimen


Temperature


Minimum absorbed average energy (J)

Grade 2 chain accessories

1 set

0°C

To be with reference

Grade 3 chain accessories

2 set

0°C and -20°C

At 0°C to be of 60J, At other temperature to be with reference

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

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Ch 2 Approval of Manufacturing Process Ch 2, Sec 10-3

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