TM & Close-up Survey Guidance v6.1 2012 Part 3.pdf

8/10/2019 TM & Close-up Survey Guidance v6.1 2012 Part 3.pdf

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THICKNESS MEASUREMENT AND CLOSE-UP SURVEY

GUIDANCE, v6.1May 2012

PART 3 SPECIAL SURVEY REQUIREMENTS:

Bulk Carriers


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THICKNESS MEASUREMENT AND CLOSE-UP SURVEY GUIDANCE

Contents Part 3

LLOYDS REGISTER2

PART 3 SPECIAL SURVEY REQUIREMENTS

CHAPTER 1 THICKNESS MEASUREMENT REQUIREMENTS (3.1)

Section 1 Single and Double Skin Bulk Carriers (3.1.1)

CHAPTER 2 CLOSE-UP SURVEY REQUIREMENTS (3.2)

Section 1 Single Skin Bulk Carriers (3.2.1)

2 Double Skin Bulk Carriers (3.2.2)

3 Ore Carriers (3.2.3)

CHAPTER 3 SUBSTANTIAL CORROSION (3.3)

Section 1 Single Skin Bulk Carriers Shell Plating and Stiffening (3.3.1)

with Substantial Corrosion

2 Single Skin Bulk Carriers Double Bottom and Hopper (3.3.2)

Structure with Substantial Corrosion

3 Single and Double Skin Bulk Carriers Transverse (3.3.3)

Bulkheads in Cargo Holds with Substantial Corrosion

4 Single and Double Skin Bulk Carriers Deck Structure (3.3.4)

including Cross Strips, Main Cargo Hatchways, Hatch Covers,

Coamings and Topside Tanks with Substantial Corrosion

5 Double Skin Bulk Carriers Bottom, Inner Bottom and (3.3.5)

Hopper Structure with Substantial Corrosion

6 Double Skin Bulk Carriers Double Side Space (3.3.6)

Structure, (including Wing Void spaces of Ore Carriers)

with Substantial Corrosion


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Thickness Measurement Part 3, Chapter 1

SINGLE AND DOUBLE SKIN BULK CARRIERS Section 1

LLOYDS REGISTER3

3.1 THICKNESS MEASUREMENT REQUIREMENTS

Table 3.1.1 Single and Double Skin Bulk Carriers (Including Ore Carriers)

Requirements based on Pt 1, Ch 3,6 TABLE 3.6.4of the Rules and Regulations for the Classification ofShips

SPECIAL SURVEY I (Ships 5 Years Old)

(1) Measurement for general assessment and recording of corrosion pattern, of those structuralmembers subject to Close-up Survey in accordance with the Rules for Ships, Pt 1, Ch 3, Table 3.6.1,Table 3.6.2or Table 3.6.3- see Section 3.2

(2) Critical Areas, as required by the Surveyor

SPECIAL SURVEY II (Ships 10 Years Old)

(1) a Within Cargo Length Area; two sections of deck plating outside line of cargo hatch openings

(2) Measurement for general assessment and recording of corrosion pattern, of those structural

members subject to Close-up Survey in accordance with the Rules for Ships, Pt 1, Ch 3, Table 3.6.1,Table 3.6.2or Table 3.6.3- see Section 3.2


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(3) Wind and water strakes in way of the transverse sections considered in (1a)

(4) Selected wind and water strakes outside the cargo length area

(5) Cargo hold shell frames on single skin ships, seeNote 5



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SPECIAL SURVEY III (Ships 15 Years Old)

(1) a Within the cargo length area; Each deck plate outside line of cargo hatch openings

(1) b Within the cargo length area; 2 transverse sections, outside line of cargo hatch openings. (Aminimum of 1 of the above transverse sections is to be within 0.5L amidships)

(2) Measurement for general assessment and recording of corrosion pattern, of those structuralmembers subject to Close-up Survey in accordance with the Rules for Ships, Pt 1, Ch 3, Table 3.6.1,Table 3.6.2or Table 3.6.3- see Section 3.2


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(3) All wind and water strakes within the cargo length area

(4) Selected wind and water strakes outside the cargo length area

(5) All cargo hatch covers and coamings (plating and stiffeners)


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(6) All transverse webs with associated plating and longitudinals, and the transverse bulkhead completein the fore peak tank, see Note 1 and 3

(7) The aft bulkhead of the forward cargo hold on single skin ships, seeNote 4

(8) Cargo hold shell frames on single skin ships, seeNote 5



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SPECIAL SURVEY IV (Ships 20 Years Old)

(1) a Within the cargo length area; each deck plate outside line of cargo hatch openings

(1) b Within the cargo area; 3 transverse sections, outside line of cargo hatch openings. (A minimum of2 of the above transverse sections is to be within 0,5L amidships.)


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(1) c Within the cargo length area; each bottom plate

(2) Measurement for general assessment and recording of corrosion pattern, of those structural memberssubject to Close-up Survey in accordance with the Rules for Ships, Pt 1, Ch 3, Table 3.6.1, Table 3.6.2orTable 3.6.3- see Section 3.2

(3) All wind and water strakes over the full length of the ship, port and starboard. (Wind and WaterStrake: the strakes of a ships side shell plating between the ballast and the deepest load waterline)


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(5) Remaining exposed main deck plates not considered in item (1a) and representative exposedsuperstructure deck plating (i.e. poop, bridge and forecastle deck)


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(6) All transverse webs with associated plating and longitudinals, and the transverse bulkhead complete

in the fore peak tank and aft peak tank, see Notes 1 and 3

(7) All keel plates outside the cargo length area. Also additional bottom plates in way of cofferdams.Machinery space and aft end of tanks

(8) Plating of sea chests. Also side shell plating in way of overboard discharges, as considerednecessary by the Surveyor


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RIERS Section 1

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SINGLE AND DOUBLE SKIN BULK CAR

(9) The aft bulkhead of the forward cargo hold on single skin ships, see Note 4

(10) Cargo hold shell frames on single skin ships,seeNote 5


NOTES

The requirements in this table apply to both single skin and double skin ships unless stated otherwise.

1.For areas in spaces where coatings are found to be in GOOD condition, as defined in the Rules forShips, Pt 1, Ch 3, 1.5, the extent of thickness measurement may be specially considered. Prior to anycoating or re-coating of cargo holds, scantlings are to be confirmed by thickness measurement with theSurveyor in attendance.

2.Transverse sections should be chosen where the largest reductions are likely to occur, or as revealedby deck plating measurement.

3. Transverse bulkhead complete including stiffening system.

4. For ships assigned the notation ESN, the corrugated part of the aft transverse bulkhead of the forwardcargo hold is to be subject to thickness measurement. This is to include each vertical corrugation at itslower and middle level including shedder plates and gusset plates, where applicable.

5. Single skin bulk carriers contracted for construction prior to 1 July 1998 are to undergo a re-assessment of their cargo hold shell frames in accordance with the Provisional Rules for Existing Ships.The number of shell frames to be measured is equivalent to the number of shell frames subject to Close-up Survey (seeRules for Ships Pt 1, Ch 3, Table 3.6.1), with representative measurements to be takenat specific areas for each frame.


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Close-up Survey Part 3, Chapter 2

SINGLE SKIN BULK CARRIERS SS1 Section 1

LLOYDS REGISTER13

3.2 CLOSE-UP SURVEY REQUIREMENTS

Table 3.2.1 Single Skin Bulk Carriers



(1) 25% of shell frames and their end attachments inthe forward cargo hold at representative positions

(2) Selected shell frames and their end attachments inremaining cargo holds

(3) 1 transverse web with associated platingand longitudinals in 2 representative waterballast tanks of each type (i.e. topside orhopper side tank)


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(4) 2 selected cargo hold transverse bulkheads,including internal structure of upper and lowerstools, where fitted. This is to include the aftbulkhead of the forward hold



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(1) a For bulk carriers with a deadweight less

than 100,000 tonnes, all shell frames in theforward cargo hold and 25% of frames in each ofthe remaining cargo holds, including their endattachments and adjacent shell plating

(1) b For bulk carriers with a deadweight equalto or greater than 100,000 tonnes, all shellframes in the forward cargo hold and 50 % offrames in each remaining cargo hold, includingtheir end attachments and adjacent shell plating

(2) 1 transverse web with associated platingand longitudinals in each water ballast tank


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(3) Forward and aft transverse bulkheadin 1 side ballast tank, including stiffeningsystem

(4) All cargo hold transverse bulkheads includinginternal structure of upper and lower stools, wherefitted

efitted



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(6) All deck plating and under deck structure inside line of hatch openings between all cargo holdhatches


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(1) All shell frames in the forward and one other

selected cargo hold and 50% of frames in each ofthe remaining cargo holds, including their endattachments and adjacent shell plating

(2) All transverse webs with associatedplating and longitudinals in each waterballast tank

(3) All transverse bulkheads in ballasttanks, including stiffening system


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ginternal structure of upper and lower stools, wherefitted




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SPECIAL SURVEY IV (Ships 20 Years Old )

(1) All shell frames in all cargo holds, including

their end attachments and adjacent shell plating

(2) All transverse webs with associated platingand longitudinals in each water ballast tank

(3) All transverse bulkheads in ballast tanks,including stiffening system


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NOTESThe requirements in this Table apply to all single skin bulk carriers unless stated otherwise.

1. Ballast tank includes peak tanks.

2.Close-up Survey of transverse bulkheads to be carried out at four levels:

Level (a) Immediately above the inner bottom and immediately above the line of gussets (if fitted) andshedders for ships without lower stool.

Level (b) Immediately above and below the lower stool shelf plate (for those ships fitted with lowerstools), and immediately above the line of the shedder plates.

Level (c) About mid-height of the bulkhead.

Level (d) Immediately below the upper deck plating and immediately adjacent to the upper wing tankand immediately below the upper stool shelf plate for those ships fitted with upper stools, or immediatelybelow the topside tanks.


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DOUBLE SKIN BULK CARRIERS SS1 Section 2

LLOYDS REGISTER23

Table 3.2.2 Double Skin Bulk Carriers

Requirements based on Pt 1, Ch 3,6 TABLE 3.6.2of the Rules and Regulations for the Classification of

Ships


(1) 1 transverse web with associated plating andlongitudinals in 2 representative water ballasttanks of each type. This is to include the foremosttopside and double side ballast tanks on eitherside

(2) 2 Selected cargo hold transverse bulkheadsincluding internal structure of upper and lowerstools, where fitted



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(1) 1 transverse web with associated plating and

longitudinals in 2 representative water ballasttanks of each type. This is to include the foremosttopside and double side ballast tanks on eitherside

(2) Forward and aft transverse bulkheads,

including stiffening system, in a complete ballasttank, see Note 1

(3) 25% of ordinary transverse web frames inthe foremost double side tanks


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(4) One transverse bulkhead in each cargo holdincluding internal structure of upper and lowerstools, where fitted


(6) All deck plating and underdeck structure inside line of hatch openings between all cargo holdhatches


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(1) All transverse webs with associated plating

and longitudinals in each water ballast tank

(2) All transverse bulkheads in the ballast tanks,including stiffening system

(3) 25% of ordinary transverse web frames in alldouble side tanks


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(4) All cargo hold transverse bulkheads includinginternal astructure of upper and lower stools, wherefitted




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SPECIAL SURVEY IV (Ships 20 Years Old )

(1) All transverse webs with associated

plating and longitudinals in each water ballasttank

(2) All transverse bulkheads in ballast tanks, includingstiffening system

(3) All ordinary transverse web frames in alldouble side tanks


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NOTES

(1) Complete ballast tank means topside tank, hopper tank, double bottom tank and double side tank,even if these are separate.

(2) Ballast Tank includes peak tanks.

(3) Close-up Survey of transverse bulkheads to be carried out at four levels:






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ORE CARRIERS Section 3

LLOYDS REGISTER31

Table 3.2.3 Ore Carriers

Requirements based on Pt 1, Ch 3,6 TABLE 3.6.3of the Rules and Regulations for the Classification

of Ships

Special Survey I(Ships 5 years old)

Special Survey II(Ships 10 years old)

Special Survey III(Ships 15 years old)

Special Survey IV(Ships 20 years old andover)

(1)1 web frame ringcomplete includingadjacent structuralmembers in a waterballast wing tank

(2)1 transversebulkhead lower partincluding girder systemand adjacent structuralmembers in a ballasttank

(3)2 selected cargohold transversebulkheads, includinginternal structure ofupper and lower stoolswhere fittedseeNote 2

(4)All cargo hold hatchcovers and coamings(plating and stiffeners)

(1)All web frame ringscomplete includingadjacent structuralmembers in a waterballast wing tank

(2)1 deck transverseincluding adjacentstructural members ineach remaining waterballast tank

(3) Forward and afttransverse bulkheadsincluding girder systemand adjacent structuralmembers in a ballastwing tank

(4)1 transversebulkhead lower partincluding girder systemand adjacent structural

members in eachremaining ballast tank

(5)1 transversebulkhead in each cargohold, including internalstructure of upper andlower stools wherefitted, seeNote 2


(7)All deck plating andunder deck structureinside line of hatchopenings between allcargo hold hatches

(1)All web frame ringscomplete includingadjacent structuralmembers in each waterballast tank

(2)All transversebulkheads includinggirder system andadjacent structuralmembers in eachballast tank

(3)1 web frame ringcomplete includingadjacent structuralmembers in each wingvoid space

(4)Additional webframe rings includingadjacent structuralmembers in void

spaces as deemednecessary by theSurveyor

(5)All cargo holdtransverse bulkheads,including internalstructure of upper andlower stools wherefitted, seeNote 2



(1)All web frame ringscomplete includingadjacent structuralmembers in each waterballast tank

(2)All transversebulkheads includinggirder system andadjacent structuralmembers in eachballast tank

(3)1 web frame ringcomplete includingadjacent structuralmembers in each wingvoid space

(4)Additional webframe rings includingadjacent structuralmembers in void

spaces as deemednecessary by theSurveyor

(5)All cargo holdtransverse bulkheads,including internalstructure of upper andlower stools wherefitted, seeNote 2




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ORE CARRIERS Section 3

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NOTESThe requirements in this Table apply to all single skin bulk carriers unless stated otherwise.

1.Ballast tank includes peak tanks.2.Close-up Survey of transverse bulkheads to be carried out at four levels:






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Substantial Corrosion Part 3, Chapter 3

LLOYDS REGISTER33

3.3 SUBSTANTIAL CORROSION

Table 3.3.1 Single Skin Bulk Carriers Shell Plating and Stiffening with Substantial Corrosion


Structural member Extent of measurement Pattern of measurement

(1)Bottom and sideshell plating

Suspect plate, plus fouradjacent plates

5 point pattern for each panel betweenlongitudinals

(2)Bottom/side shelllongitudinals

Minimum of three longitudinalsin way of suspect areas

3 measurements in line across web and 3measurements on flange

(3)Side shell frames Suspect frame and eachadjacent

At each end and mid-span:

(a)5 point pattern on both web and flange

(b)5 point pattern within 25 mm of weldedattachment to both shell and hopper slopingplate

Table 3.3.2 Single Sink Bulk Carriers Double Bottom and Hopper Structure with Substantial

Corrosion.


Ships


(1)Inner bottom plating Suspect plate plus allimmediately adjacent plates

5 point pattern for each panel betweenlongitudinals over 1 m length

(2)Inner bottomlongitudinals

Three longitudinals in way ofplates measured

3 measurements in line across web and3 measurements on flange

(3)Transverse floors andlongitudinal girders

Suspect plates 5 point pattern over approximately 1 m2

of plating

(4)Watertight floors andgirders (a)lower 1/3 of tank(b)upper 2/3 of tank

(a)5 point pattern over 1 m

2

of plating(b)5 point pattern alternate plates over 1m

2of plating

(5)Transverse web frames Suspect plate 5 point pattern over 1 m2of plating


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Table 3.3.3 Single and Double Skin Bulk Carriers Transverse Bulkheads

in Cargo Holds with Substantial Corrosion


Ships

Structuralmember

Extent of measurement Pattern of measurement

(1)Lower stool (a)Transverse band within 25 mm of welded connectionto inner bottom

(a)5 point pattern betweenstiffeners over 1 m length

(b)Transverse band within 25 mm of welded connectionto shelf plate

(b)as above

(2)Transversebulkhead

(a)Transverse band immediately above lower stool shelfplate

(a)5 point pattern over 1 mlength

(b)Transverse band at approximately mid-height (b)5 point pattern over 1m

2of plating

(c)Transverse band at part of bulkhead adjacent to upperdeck or below upper stool shelf plate (for those shipsfitted with upper stools)

(c)5 point pattern over 1 m2

of plating

Table 3.3.4 Single and Double Skin Bulk Carriers Deck Structu re includ ing Cross Strips,

Main Cargo Hatchways, Hatch Covers Coamings and Topside Tanks with

Substantial Corrosion.



(1)Cross-deckstrip plating

Suspect cross-deck strip plating 5 point pattern between under deckstiffeners over 1 m length

(2)Under deckstiffeners

(a)Transverse members

(b)Longitudinal member

(a)5 point pattern at each end and mid-span

(b)5 point pattern on both web andflange

(3)Hatch covers (a)Each side and end plate, 3 locations (a)5 point pattern at each location

(b)Top plate, 3 longitudinal bands - 2 onoutboard strakes and 1 on centrelinestrake

(b)5 point measurement at each band

(4)Hatchcoamings

Each side and end of coaming, oneupper and one lower band

5 point measurement at each band


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(5)Topside salt-water ballast tanks

(a)Watertight transverse bulkheads

(i)lower 1/3 of bulkhead

(ii)upper 2/3 of bulkhead

(iii)stiffeners

(i)5 point pattern over 1 m2of plating

(ii)5 point pattern over 1 m2of plating

(iii)5 point pattern over 1 m length

(b)Swash transverse bulkheads

(i)lower 1/3 of bulkhead

(ii)upper 2/3 of bulkhead

(iii)stiffeners



(iii)5 point pattern over 1 m length

(c)3 representative bays of the topsidesloping plate

(i)lower 1/3 of tank(ii)upper 2/3 of tank



(d)suspect longitudinals and adjacentplates

5 point pattern both web and flange over1 m length

(6)Main deckplating

Suspect plates and 4 immediatelyadjacent plates

5 point pattern over 1 m2of plating

(7)Main decklongitudinals

Minimum of 3 longitudinals where platingmeasured

5 point pattern on both web and flangeover 1 m length

(8)Webframes/transverses

Suspect plates 5 point pattern over 1 m2of plating

Table 3.3.5 Double Skin Bulk Carriers Bottom, Inner Bottom and Hopper Structure with

Substantial Corrosion



(1)Bottom, inner bottom

and hopper structureplating

(a)Minimum of 3 bays across

double bottom tank, includingaft bay

5 point pattern for each panel between

longitudinals and floors

(b)Measurements aroundand under all suction bellmouths

(2)Bottom, inner bottomand hopper structurelongitudinals

Minimum of 3 longitudinals ineach bay where bottomplating measured

3 measurements in line across flange and3 measurements on the vertical web

(3)Bottom girders,including watertightgirders

At fore and aft watertightfloors and in centre of tanks

Vertical line of single measurements on girderplating with 1 measurement between eachpanel stiffener, or a minimum of 3

measurements


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(4)Bottom floors,including watertightfloors

3 floors in the bays wherebottom plating measured, withmeasurements at both endsand middle

5 point pattern over 2 m2area

(5)Hopper structureweb frame ring

3 floors in bays where bottomplating measured

5 point pattern over 1 m2of plating and single

measurements on flange

(6)Hopper structuretransverse watertightbulkhead or swashbulkhead

(a)lower 1/3 of bulkhead

(b)upper 2/3 of bulkhead

(c)stiffeners (minimum of 3)

(a)5 point pattern over 1 m2of plating

(b)5 point pattern over 2 m2of plating

(c)For web, 5 point pattern over span (2measurements across web at each end and 1at centre of span). For flange, singlemeasurements at each end and centre of span

(7)Panel stiffening Where applicable Single measurements

Table 3.3.6 Double Skin Bulk Carriers Double Side Space Structu re (Including Wing Void

spaces of Ore Carriers) with Substatial Corrosion.

Requirements based on Pt 1, Ch 3,6 TABLE 3.6.10of the Rules and Regulations for the Classificationof Ships


(1)Side shell and inner plating:

(i)Upper strake and strakes in

way of horizontal girders

(ii)All other strakes

(i)Plating between each pair oftransverse frames/longitudinals in aminimum of 3 bays along the tank

(ii)Plating between every third pair oflongitudinals in same 3 bays

(i)Single measurement

(ii)Single measurement

(2)Side shell and inner sidetransverse frames/longitudinalson:

(i)Upper strake

(ii)All other strakes

(i)Each transverse frame/longitudinal insame 3 bays

(ii)Every third transverse frame/longitudinal in same 3 bays

(i)3 measurements acrossweb and1 measurement on flange

(ii)3 measurements acrossweb and1 measurement on flange

(3)Transverseframes/longitudinals - brackets

Minimum of 3 at top, middle and bottomof tank in same 3 bays

5 point pattern over area ofbracket

(4)Vertical web and transversebulkheads:

(i)Strakes in way of horizontalgirders

(ii)Other strakes

(i)Minimum of 2 webs and bothtransverse bulkheads

(ii)Minimum of 2 webs and bothtransverse bulkheads

(i)5 point pattern overapprox. 2 m

2area

(ii)2 measurementsbetween each pair ofvertical stiffeners

(5)Horizontal girders Plating on each girder in a minimum of 3bays

2 measurements betweeneach pair of longitudinalgirder stiffeners

(6)Panel stiffening Where applicable Single measurements


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TM & Close-up Survey Guidance v6.1 2012 Part 3.pdf