Iranian Classification Society Rules
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Section 6 High Holding Power Anchors and Super High Holding Power Anchors
601. Application
1. The requirements in this Section apply to tests and inspection for the approval of high holding power anchors and super high holding power anchors in accordance with requirements in Pt 4, Ch 8,
304. of the Rules.
2. The manufacturer who supplies the raw materials of anchors which is subjected to the requirements in this Section is to obtain approval of manufacturing process of raw materials in accordance with the requirements in each Section of Pt 2, Ch 1 of the Rules.
3. The manufacturer who makes casted anchors 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.
602. Data to be submitted
The following reference data are to be submitted to the Society in addition to those specified in
102.
(1) Kind and type of the anchor
(2) Maximum mass of the anchor
(3) Test data of sea bed holding power and information concerning the anchor
(4) Working standards for welding or casting and heat treatments
(5) Non-destructive testing standards
603. Type tests
1. Type test and acceptance criteria
(1) The type test is to be carried out on an anchor with the mass closest to the maximum applied mass on the test item specified in Table 3.6.1, in the presence of the Surveyor. However, in
case where these requirements are found impracticable due to special considerations may be given.
(2) The testing procedures and acceptance criteria are to be as given in
type of anchors, separate
Table 3.6.1. However, in
case where these requirements are found impracticable, separate considerations may be given.
Table 3.6.1 Type test and acceptance criteria of anchor
Test item | Test method | Acceptance criteria |
Material test | (1) To be in compliance with Pt 2 of the Rule. Casted anchor is to be subjected to the impact test according to the requirements in Pt 4, Sec 8, 303. 5. of the Rule. (2) Test specimens of casted anchor are to, in principle, be taken from the body and the test blocks attached thereto. | To meet the Rule requirements |
Proof test | To be in compliance with Pt 4, Sec 8, 309. 3 of the Rule. | |
Drop test | Drop test of casted anchor is to be in compliance with Pt 4, Sec 8, 309. 2. (1) of the Rule. Dropping is to be made for 3 attempts at least. | To be free from cracks or other harmful defects. |
Hammering test | After the drop test, the anchor is to be slung clear of the ground and thoroughly hammered in accordance with Pt 4, Ch 8, 309. 2. (2) of the Rules. | |
Visual inspection | To be in compliance with Pt 4, Sec 8, 309. 4 of the Rule. | To meet the Rule requirements |
Non-destructive test | To be carried out the extended non-destructive examination in accordance with Pt 4, Ch 8, 309. 6. of the Rules. | |
Holding power test | (A) Holding power test is to include the holding power measuring test and embed test and is to be carried out on anchors of different mass for respective modes of test in accordance with the requirements specified in Table 3.6.2. Where sufficient data are submitted, and if the Society considers appropriate, all or part of the holding power measuring test may be omitted. (B) The holding power measuring test is to be carried out in three types of the soil shown Table 3.6.2 where the anchor is to be dragged at a fixed speed (as slow as practicable). The sea bed for testing is to be of virgin bed for each at- tempt of testing. (C) Tests are normally to be carried out from a tug but alternatively shore based tests may be accepted. | To be as deemed appropriate by the Society |
Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015 75
Table 3.6.2 Items of Holding Power Test and Numbers of Attempts
Type of anchor | Holding power measuring test | |
Soil of sea bed (3) | ||
Two pieces of test anchors | A(2) | 3 |
a(2) | 3 | |
Two pieces of anchors for comparison | B(2) | 1 |
b(2) | 1 | |
NOTES: (1) The number of test attempts given in this Table may be increased/decreased as considered appropriate by the Society. (2) Anchors "A" and "B" are to have nearly compatible masses, and the mass of anchor "a" and "b" are to, in principle, have a mass equivalent to 1/10 (1/5 for the super high holding power anchor) of that of anchor "A" and " B" or more. Anchor "A" and "B" are to, in principle, have a mass a equivalent to 1/10 (1/5 for the super high hold- ing power anchor) of the maximum mass to be approved or more (3) The tests are to be carried out using three kinds of soils, i.e, sand, mud, clay, etc | ||
2. Test records
After completion of the type test, the manufacturer is to prepare records of the type test as fol- lows, and is to submit three copies to the Society upon receiving confirmation by the Surveyor.
(1) Test records and work records of the manufacturing process on the test anchor (steelmaking process, casting process, heat treatments, etc.)
(2) Testing procedure and test arrangement (explanatory drawings on the testing procedure and test
arrangement are to be attached thereto.)
(3) The results of holding power measuring test (in addition to the results of holding power meas-
uring test ( = Holding Power/Mass), holding power characteristics curves are to tached thereto.)
(4) Properties of the soil of the sea bed (hardness, composition) and flatness of the sea bed.
(5) The dragging speed of the anchor in the holding power measuring test.
be at-
76 Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015
