Position : Home > Service > Classification Surveys
 
The classification survey can be divided into the following categories:

A. New ships surveyed during construction
For newbuildings under construction, we will arrange for our qualified surveyors to be stationed at shipyards in order to conduct surveys in accordance with the Rules and the approved drawings.

B. Survey of existing ships
(a) Procedures for survey of existing ships

 

* The name of vessel , survey items, name and Tel Number of contact person, and time and place of survey shall be indicated on the survey application form.

(b) The scope of implementation regarding survey of existing ships is categorized based on CR Rules, and outlined as follows:
(1) Classification survey of existing ships

a. For ships which are classed with other classification societies, such as ABS, BV, GL, LR, NK, DNV and have been surveyed in accordance with the requirements of their rules, we accept the survey reports previously issued by other classification societies and maintain their survey status in principle. The survey items that are not yet due may be completed when they are due, whereas the surveys items already due shall be completed first. In general, a survey to the extent of an intermediate survey as specified in CR Rules is to be conducted, and the outstanding items from previous classification societies shall be dealt with.

b. For classification of an existing ship, the owner shall submit an application form (Application for New Ship/Existing Ship Entry Survey Form No. Xm9 as Attachment 1), and copies of the certificates /reports issued by the previous classification society (please refer to the Abstract of Procedures for Application for Classification of Existing Ships and Issuance of International Convention Certificates as Attachment 2) to this Society for approval. .

c. For initial classification of an existing ship not classed with any other classification society, the owner shall submit copies of the survey records and supporting documents issued by the previous classification society. We will review and consider such records, documents, and ship age in order to decide on the scope of classification survey. All the survey items which are listed in the survey records and are almost due or overdue shall be completed.

(2) Periodical survey of existing ships
a. Class Special Survey of Hull (HRS)
b. Class Special Survey of Machinery (MRS)
c. Class Special Survey of Refrigerating Machinery (RRS)
d. Class Special Survey of Auto & Rem. C. S.(AUR)
e. Special Survey of Inert Gas System (IGR)
f. Class Annual Survey of Hull (HAS)
g. Class Annual Survey of Machinery (MAS)
h. Class Annual Survey of Refrigerating Machinery (RAS)
i. Class Annual Survey of Auto & Rem.C.S.(AUA)
j. Annual Survey of Inert Gas System (IGA)
k. Class Intermediate Survey (CIS)
l. Bottom Survey (BDS)
m. Propeller Shaft Survey (TSS)
n. Auxiliary Boiler Survey (ABS)

(3) Hull/Machinery Continuous Survey (HCS/MCS)

(4) Conversion Survey

(5) Occasional Survey

(c) Approval of extension survey of existing ships:
The owner shall submit documents stating the type of extension survey, the reason for such survey, and the extension period to this society for application.
(1) Extension of bottom survey

a. According to the Rules for the Construction and Classification of Steel Ships, or the international conventions, two bottom surveys shall be carried out within a 5-year period. The maximum interval between two bottom surveys shall not exceed 36 months, and one of the two bottom surveys required in each five year period shall coincide with the special survey.

b. In the case of owners’request for extension of the bottom survey because it exceeds the above survey interval, special consideration shall be given to such limited extension, and the following surveys shall be completed before such extension is granted.
1. General condition survey of hull: Including side shell plating above the waterline, and deck plating.
2. The logbook kept on board shall be checked to ensure that no damage to the hull has occurred since the last bottom survey.
3. After completing one, or more than one, of the following items with satisfactory results:
3-1 The in-water survey, which is carried out by an approved diver in the presence of a surveyor to ensure that the hull below the waterline, the propeller, and the rudder are in good working condition.
3-2 A statement presented by the master confirming that no damage to the hull has occurred since the last bottom survey.

(2) Procedures for reviewing application for extension survey:
a. According to the Rules for the Construction and Classification of Steel Ships, a propeller shaft survey shall be carried out at intervals of 2 1/2 years to 5 years (depending on the types and bearings).

b. The requirements of extension:
1. The extension of a seawater lubricated propeller shaft survey shall not exceed one year (may be extended once only). The scope of the survey is as follows:
Satisfactory service record and an external examination of the inboard and outboard tailshaft assemblies, together with the bearing wear down check at the end of the normal survey period.

2. For an oil lubricated propeller shaft survey, a maximum of two one-year extensions or one five-year extension is permitted, but not the combination of both.

2.1 For extension not exceeding one year, the scope of survey is as follows:
*Verification of satisfactory service and oil loss records;
*An external examination of the inboard and outboard seal assemblies;
*An examination of oil sample at the time of each requested extension;
*Confirmation of the record of the bearing wear down.

2.2. For extension not exceeding 5 years, the scope of survey is as follows:
*Verification of satisfactory service including oil loss records;
*Verification of no reported repairs by grinding or welding;
*Oil sample examination and test (if the sample is clear, there is no reason to require further testing);
*Bearing wear down measurement;
*Verification that the propeller is free of damages which may cause the propeller to be out of balance;
*Bearing inboard seal assemblies are to be externally examined and to be found or placed in a satisfactory condition;
*Bearing outboard seals are to be renewed and seal liner found to be or placed in satisfactory condition.

c. Extension of auxiliary boiler survey:
I. According to the Rules for the Construction and Classification of Steel Ships, at least two auxiliary boiler surveys shall be carried out within each 5-year period. The maximum interval between two auxiliary surveys shall not exceed 36 months.
II. In the case of owners’request for extension of the survey because it exceeds the above survey interval, special consideration shall be given to it. Such limited extension shall not exceed 6 months, and the following surveys shall be completed before such extension is granted.
1. The fittings on boiler shells shall be ascertained to be in good condition, and the Boiler Logbook shall be ascertained to be in good condition.
2. The safety devices shall be examined to ensure that the safety precaution function is in good condition.
3. The function of the setting of safety valve shall be tested to ensure that it functions normally.

C. Extension of Classification special survey:
According to the Rules for the Construction and Classification of Steel Ships, a classification survey shall be renewed every five years. The extension of such a survey shall not exceed 3 months, which merely allows the vessel to complete its intended voyage for inspection.

 
 
 
8th Fl., No.103, Sec. 3, Nanking E. Rd., Jhongshan Dist., Taipei, 104, Taiwan R.O.C. +886-2-25062711 +886-2-25074722 cr.tp@crclass.org www.crclass.org
 
 
Copyright © 2017 CR CLASSIFICATION SOCIETY