IR CAPIR CAP Indian Register of Shipping IR-CAP Condition Assessment Program Indian Register of...

IR

CAP

Indian Register of Shipping

IR-CAP

Condition Assessment Program


IR

CAP


The Purpose of this Presentation...

• To help you understand CAP Rating

• To explain the Rating Process

• To help you know the factors that affect the rating

IR

CAP


CAP Rating

Independent assessment carried out at the request of ship owner.

One or more aspects, viz. Ship’s Structure, Machinery & Cargo Systems can be assessed – as desired.

The extent of survey is larger than that carried out at ESP or CAS survey and the Report is very detailed.

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CAP Rating

Detailed documentary evidence is now available to all interested parties.

Assessment is carried out on as-is-basis, considering all repairs & renewals that have been carried out during the CAP survey

They can now judge the condition of vessel better & have better confidence on her ability to provide good service without any repairs in the near future.

Insurers Ship Charters

Cargo Shippers Terminal Operators

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CAP


•CAP 1: no deficiencies and/or only superficial reductions from as new or current rule scantlings

•CAP 2: deficiencies of a minor nature not requiring correction or repairs and/or scantlings significantly above class renewal limits

CAP Rating

After the assessment a CAP rating is assigned to the ship on a scale of 1- 4

•CAP 3: deficiencies which do not require immediate corrective action, and / or hull scantlings, although generally above class renewal levels, are with substantial corrosion

•CAP 4: deficiencies which affect the ship’s potential to remain in class, and / or scantlings at or below the class renewal levels

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Benefits to Ship Owner…

The CAP survey also provides the ship owner, a basis to plan the maintenance that ensures continued asset utilization.

The Ship owner can obtain better charters by demonstrating better quality of his ships.

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CAP Rating Process - Hull

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Local Strength Rating

Longitudinal Strength Rating

Total Hull Rating

Satisfactory survey of Hull Fittings

Anchor, Cable, Windlass, Rudder & Steering Gear, Weather-tightness, Shipside valvesTank Testing is a pre-requisite !

and

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CAP



Thickness measurement readings greatly influence Local Strength Rating

A rating could be derived by assessing the TM readings statistically, for a local structure

A rating could be derived by systematically evaluating each significant structural panel and identifying the weakest panel

or

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It is all too well known that the chain is as strong as it’s weakest link,

so it is in the ship structure

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A rating derived by identifying the weakest link would be therefore more precise, and a better indicator

Although such an assessment is more difficult to accomplish and time consuming

IR-CAP utlises this concept to derive local strength rating

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CAP


Local Strength Rating Process

Ship

A Compartment

Compartments in Cargo region + APT & FPT

The Compartment Boundaries

Structural Panels

Plating + Secondary Stiffeners + Primary Girders

Rating process starts at Panel Level

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Local Strength Rating ProcessBesides TM readings the assessment also considers internal / external examination and test results

That is condition of the structure including coating condition also influences the rating

Thus the compartment rating is derived considering TM readings and observed condition of the compartment

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Dry-dock External Examination

Internal Examination

Local Strength Rating of Each Panel

Overall survey

Close-up survey

Thickness Measurements

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CAP


4 Attributes that are reported from External and Internal Examinations

General condition Buckling, Indentations, Cracks

These attributes are considered together with the Thickness Measurement to rate each panel

Wastage Pitting, Localized thinning

Coating condition Good, Fair or Poor

Anode condition Good, Adequate, In-adequate

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Evaluation is carried out by using a specially developed software that computes available Longitudinal Strength, at various sections in the cargo region

Available Strength is then compared with that required at the location.

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The software also helps evaluation of various repair options to improve the longitudinal strength, where required, in an optimum way.

Longitudinal Strength Rating for the Vessel = the poorest rating obtained.

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Total Hull Rating - Computation

Total Hull Rating

Rating of each Individual Compt.

Weighted Average

Compt. Boundaries

Rating of Panels in Boundary Surface

Overall Rating (Longl Strength)

Minimum over the entire Cargo Length

Longitudinal Strength evaluation at various sections

Overall Rating(Local Structures)

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CAP Rating

Machinery / Cargo Systems

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CAP Rating – Machinery / Cargo Systems

Overall Survey

Functional Test

Predictive Test

Audit of Maintenance

Practices

Machinery Rating

Maintenance Rating

Total Machinery

Rating

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Machinery job cards

To carry out the Machinery CAP survey ‘Job Cards’ are prepared for each ship

Ship’s Machinery is systematically arranged in logical functional system groups such as ‘Propulsion System’, etc.

For each machinery in each system, attributes to be examined are identified and listed down in the job cards.

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1 2 3 4 NAENGINES DRIVING GENERATORSPort Aux. Engine including Attachments & Coolers

Crank Case and Casing Doors including Relief DevicesCylinder Heads and valvesEntablatureBed Plates, Ties and Holding Down Bolts and ChocksExternal leakages of flammable fluidsOther external leakagesScavenges/Supercharger Pumps/BlowersAir CoolersPiston and Piston RingsCylinder LinersCrank BearingsMain BearingsCamshaft Bearings, Shafts and Cams

Rept No: CAP/15550/09/04MA CHINERY INSTALLATION RATING

Vessel : Jag Padma (I.R. No. : 15550)

6Job Cards are prepared by grouping the machinery into well defined systems - Propulsion System etc.

Machinery job cards

Note the detailed list of components for each machinery unit, for which information is reported These job cards prepared by H.O. for each ship, and are filled up by the surveyor performing the survey

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Overall Survey / Function Test

Each machine is examined as per the items identified on the Job- cards

Function test of each machinery is witnessed and it’s current capability assessed

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Overall Survey

•Examination of each machine component for any deterioration, corrosion, wear etc.

•Verify the condition of instrumentation, and

•Note presence of any leakages, etc.

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Functional Testing

• To verify that the intended function of the machinery is being performed satisfactorily

• Verify the Operational Parameters / Measure the output and

• Verify the functioning of safety devices

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Predictive Testing

All machinery is subjected to predictive testing, as applicable, to ensure no hidden defects exist

Depending on the machinery one or more of the following tests employed:

•Vibration measurements

•Used oil analysis

•IR ( Insulation Resistance) Measurement

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Measured vibration levels are compared against acceptable levels and ratings assigned.

Acceptable levels adopted are derived from ISO Std. 7919, and from our past experience.

Vibration Measurements :

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Audit of Maintenance Practices

The audit verifies that:

Maintenance routines are as per manufacturer’s recommendations and good engineering practice

Maintenance routines are carried out as per schedule and records maintained

A good system of Inventory Control for spares and stores exists for maintenance activity

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Total Machinery Rating - Computation

Total Machinery Rating

Rating of each Individual Syst.

Weighted Average

Mach. Attributes + Predictive Testing

Rating of Machinery Items

Overall Rating (Maintenance)

Minimum over all the Systems

Audit of maintenance practice for each machinery

Overall Rating(Machinery Current

Status)

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In Summary…

IR- CAP is a comprehensive scheme for assessment of Tankers

The implementation of the scheme is also as disciplined

Well Accepted by our clients as a Value Adding Service

Another example of Quality Service from IRS

IR

CAP


Thank you !

IR CAPIR CAP Indian Register of Shipping IR-CAP Condition Assessment Program Indian Register of...

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