Publications   –Free Publications–

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This booklet provides checklists for PSC inspection, Routine maintenance, ISM Code, ISPS Code, as a result of analysis of PSC records, customer’s comments, in order to improve ship’s maintenance standards.

(Summary)
This booklet provides checklists for PSC inspection, Routine maintenance, ISM Code, ISPS Code, as a result of analysis of PSC records, customer’s comments, in order to improve ship’s maintenance standards.

(Summary)
This booklet provides checklists for PSC inspection, Routine maintenance, ISM Code, ISPS Code, as a result of analysis of PSC records, customer’s comments, in order to improve ship’s maintenance standards.

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Guidance for ship owner

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ClassNK ISM Register for Companies includes Data of Company name / Address, and Types of ships under the management / ClassNK ISM and ISPS Register for Ships includes Data of Classification Society, Class No., IMO No., Vessel Name, Flag, Date of Registration, Port of Registry, Distinctive No. or Letter, Gross Tonnage, Type of Ship and Name of Management Company.

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List of ClassNK Service Sites

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This Magazine introduces various publicity-related articles of the Society’s businesses, including technical matters and information in English.

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This report is a Korean language version of the Annual Report 2008.

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This report introduces the Society’s acti‚–ities during 2008 fiscal year.

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This report is a Chinese language version of the Annual Report 2006 released previously in English and Japanese.

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This annual PSC report summarizes deficiencies identified by Port State Control (PSC) inspections carried out in various countries of the world. This report is prepared with the objective of building awareness of the present state of PSC and to improve future maintenance and surveys.

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The introduction of the results of the Society’s research and technical activities in English, including technical reports/papers, introduction of new technology, outline of research activities, etc.

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Outline of Liquified Gas Carrier including the Requirement of the Code, Construction, Arrangement, Equipment, etc

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Maintenance Guidance for Lumber Carriers

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A disaster happened in a nuclear power plant in Japan in August 2004, which was caused by failure of condensation water pipe in the secondary line. Shipping industries are concerned for possibility of occurrence of such a disaster in ships due to its construction similarity to marine boiler plant in steam, feed water, and condensation piping for main or auxiliary boilers. Nippon Kaiji Kyokai has therefore investigated and showed the result that similar corrosion failure as in the nuclear power plant has occurred in shipboard steam/feed water/condensation water pipes for main and auxiliary boiler plants without causing severe consequences. It is also found that this kind of failure, named “Flow Accelerated Corrosion” and referred to as “FAC”, is caused by erosion-corrosion at a place where the flow is extremely turbulent, such as a location right downstream side of an orifice or a control valve, or at bend parts including elbows, etc., under strong influence of temperature, flow velocity or pH of the fluid. Additionally the result of wall thickness measurements on actual pipe lines of some ships show a very definite evidence of a reduction in wall thickness of carbon steel piping. It was confirmed that the amount of actual reduction in wall thickness could be well predicted by Kastner Equation. Nippon Kaiji Kyokai summarized these evidences with treatment after found wall thickness reduction of pipes referring ASME code case N-597-2 as a ClassNK gaidelines.

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ClassNK has just released the English edition of Version II of its previously well-received Guidance for Measures to Cope with Degraded Marine Fuels: Taking into Account the Poor Combustibility of Fuels this November. While the first 1996 edition (Ver. I) focused on preventing increases in major damages attributable to fuel oil, the 2008 edition (Ver. II) takes a close look at what can be done to prevent FO problems that can arise from poor combustibility. [Digest Version]

(Summary)
ClassNK has just released the English edition of Version II of its previously well-received Guidance for Measures to Cope with Degraded Marine Fuels: Taking into Account the Poor Combustibility of Fuels this November. While the first 1996 edition (Ver. I) focused on preventing increases in major damages attributable to fuel oil, the 2008 edition (Ver. II) takes a close look at what can be done to prevent FO problems that can arise from poor combustibility.

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In recent years, there has reportedly been a rise in main engine bearing damages due to improper shafting alignment. Specifically the combination of a stiffer shafting resulting from increasing output with lower RPM of the main engine and a more flexible hull structure as result of optimized design and use of high tensile steel is said to be the cause. That is to say that stiff shafting can no longer accommodate any small changes in bearing offsets that they may have absorbed before, while the hull structures are more likely to deflect while in service, causing changes in bearing offsets. These guidelines reflect the results of intensive researches and investigations in this field carried out by ClassNK Research Institute, including FEA of hull structure and onboard ship measurement of hull deflections. In these guidelines, high accuracy alignment calculation models incorporating all engine bearings and using equivalent circular bar representing crankshaft, an procedure for optimizing longitudinal placement of intermediate bearing to minimize shafting sensitivity to bearing offsets variation, and the prediction method of variation in bearing offsets between initial condition and representative service conditions are proposed.

(Summary)
In recent years, there has reportedly been a rise in main engine bearing damages due to improper shafting alignment. Specifically the combination of a stiffer shafting resulting from increasing output with lower RPM of the main engine and a more flexible hull structure as result of optimized design and use of high tensile steel is said to be the cause. That is to say that stiff shafting can no longer accommodate any small changes in bearing offsets that they may have absorbed before, while the hull structures are more likely to deflect while in service, causing changes in bearing offsets. These guidelines reflect the results of intensive researches and investigations in this field carried out by ClassNK Research Institute, including FEA of hull structure and onboard ship measurement of hull deflections. In these guidelines, high accuracy alignment calculation models incorporating all engine bearings and using equivalent circular bar representing crankshaft, an procedure for optimizing longitudinal placement of intermediate bearing to minimize shafting sensitivity to bearing offsets variation, and the prediction method of variation in bearing offsets between initial condition and representative service conditions are proposed.

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Reseach and Study on Measures for Deterioration of Marine Fuel Oils

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Introduction of NK’s Information service

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Introduction to Offshore Support Vessels Work Boats

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An introduction to the ClassNK Research Center and the activities of each department at the center.

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An introduction to the ClassNK Information Center and the activities of each department at the center.

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Introduction to NK-PASS (Digital Drawing Approval System)

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Introduction to NK-PASS (Digital Drawing Approval System)

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Introduction to NK-PASS (Digital Drawing Approval System)

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Introduction of Gas Carrier

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Introduction of Gas Carrier

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Introduction to ETAS (Emergency Technical Assistance Service)

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Introduction to ETAS (Emergency Technical Assistance Service)

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Introduction to ETAS (Emergency Technical Assistance Service)

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Introduction of Container Ships

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Outline for Ship Recycling Convention and the information about ClassNK’s service on the convention

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A pamphlet to introduce class entry for existing ships

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Introduction to Chemical Tanker

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Introduction of Chemical Tanker

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Introduction to Bulk Carrier

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Introduction of NK’s activities

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Introduction of NK’s activities

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Introduction of NK’s activities

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Introduction of NK’s activities

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Introduction of NK’s activities