Annex 1 - Minimum Requirements for Close-Up Survey at Renewal Survey of Double Hull Oil Tankers
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Assembly - IMO Resolution A.744(18) Guidelines on the Enhanced Programme of Inspections During Surveys for Bulk Carriers and Oil Tankers (Adopted on 4 November 1993) - Annex B - Guidelines on the Enhanced Programme of Inspection During Surveys for Oil Tankers - Part A - Guidelines on the Enhanced Programme of Inspections During Surveys of Double Hull Oil Tankers - Annex 1 - Minimum Requirements for Close-Up Survey at Renewal Survey of Double Hull Oil Tankers

Annex 1 - Minimum Requirements for Close-Up Survey at Renewal Survey of Double Hull Oil Tankers

Age ≤ 5 years 5<age≤10 years 10<age≤15 years Age>15 years
1 2 3 4
One web frame (1), in a complete ballast tank (see Note 1) All web frames (1), in a complete ballast tank (see Note 1) The knuckle area and the upper part (5 m approximately) of one web frame in each remaining ballast tank (6) All web frames (1), in all ballast tanks As for ships referred to in column 3
Additional transverse areas as deemed necessary by the Administration
One deck transverse, in a cargo oil tank (2) One deck transverse, in two cargo oil tanks (2) All web frames (7), including deck transverse and cross ties, if fitted, in a cargo oil tank
One web frame (7), including deck transverse and cross ties, if fitted, in each remaining cargo oil tank
One transverse bulkhead (4), in a complete ballast tank (see Note 1) One transverse bulkhead (4), in each complete ballast tank (see Note 1) All transverse bulkheads, in all cargo oil (3) and ballast (4) tanks
One transverse bulkhead (5) in a cargo oil centre tank One transverse bulkhead (5), in two cargo oil centre tanks
One transverse bulkhead (5), in a cargo oil wing tank (see Note 2) One transverse bulkhead (5), in a cargo oil wing tank (see Note 2)
NOTES:

(1), (2), (3), (4), (5), (6) and (7) are areas to be subjected to close-up surveys and thickness measurements (see appendix 3 of annex 10).

(1)Web frame in a ballast tank means vertical web in side tank, hopper web in hopper tank, floor in double bottom tank and deck transverse in double deck tank (where fitted), including adjacent structural members. In fore and aft peak tanks web frame means a complete transverse web frame ring including adjacent structural members.

(2) Deck transverse, including adjacent deck structural members (or external structure on deck in way of the tank, where applicable).

(3) Transverse bulkhead complete in cargo tanks, including girder system, adjacent structural members (such as longitudinal bulkheads) and internal structure of lower and upper stools, where fitted.

(4) Transverse bulkhead complete in ballast tanks, including girder system and adjacent structural members, such as longitudinal bulkheads, girders in double bottom tanks, inner bottom plating, hopper side, connecting brackets.

(5) Transverse bulkhead lower part in cargo tank, including girder system, adjacent structural members (such as longitudinal bulkheads) and internal structure of lower stool, where fitted.

(6) The knuckle area and the upper part (5 metres approximately), including adjacent structural members. Knuckle area is the area of the web frame around the connections of the slope hopper plating to the inner hull bulkhead and the inner bottom plating, up to 2 metres from the corners both on the bulkhead and the double bottom.

(7) Web frame in a cargo oil tank means deck transverse, longitudinal bulkhead vertical girder and cross ties, where fitted, including adjacent structural members.

Note 1 Complete ballast tank: means double bottom tank plus double side tank plus double deck tank, as applicable, even if these tanks are separate.

Note 2 Where no centre cargo tanks are fitted (as in the case of centre longitudinal bulkhead), transverse bulkheads in wing tanks should be surveyed.


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