INSPECTION GRADING CRITERIA FOR THE ABS HULL INSPECTION … · 2020-04-22 · NOTICE This manual and the inspection regime described herein are for use to comply with the ABS Hull

INSPECTION GRADING CRITERIA FOR THE ABS HULL INSPECTION AND MAINTENANCE PROGRAM (HIMP)

—— OUR MISSIONThe mission of ABS is to serve the public interest as well as the needs of our members and clients by promoting the security of life and property and preserving the natural environment.

HEALTH, SAFETY, QUALITY AND ENVIRONMENTAL POLICYWe will respond to the needs of our members, clients and the public by delivering quality service in support of our Mission that provides for the safety of life and property and the preservation of the marine environment.

We are committed to continually improving the effectiveness of our HSQE performance and management system with the goal of preventing injury, ill health and pollution.

We will comply with all applicable legal requirements, as well as any additional requirements ABS subscribes to, which relate to HSQE aspects, objectives and targets.

——NOTICEThis manual and the inspection regime described herein are for use to comply with the ABS Hull Inspection and Maintenance Program (HIMP). Additionally, this manual may be used as a reference for assessing IMO PSPC coatings. The grading and actions to be taken on those gradings are of a suggested nature only. They are not to be construed as representative of ABS class criteria or the actions taken by class upon discovery of the various types of defects noted in this hull inspection grading manual.

Owner inspections carried out utilizing this manual do not replace or substitute the classification survey requirements as stipulated in IACS PR-33.

IACS PR-33 Owner’s Hull Inspection and Maintenance SchemesOwner’s hull inspection and maintenance schemes are to be encouraged as means for maintaining compliance with classification and statutory requirements between surveys.

However, these schemes are not to be accepted as an alternative to, or a substitute for, the performance of required classification and/or statutory surveys of the hull by the surveyors of the society, or of another duly authorized society. The surveyors may be assisted, where appropriate, by service suppliers as defined in UR Z17.

—— TABLE OF CONTENTS

Introduction ...........................................................................................................1

Inspection Criteria .........................................................................................3

Coating Condition ..........................................................................................4

General Corrosion .........................................................................................15

Pitting and Grooving Corrosion .................................................25

Deformation .......................................................................................................34

Fracture ....................................................................................................................43

Cleanliness and Housekeeping ..................................................50

Notifying Superintendent and

Class Surveyor ...................................................................................................59

INSPECTION GRADING CRITERIA FOR ABS HIMP • 1

——INTRODUCTIONThis manual is to be utilized in accordance with the Hull Inspection and Maintenance Program (HIMP) outlined in the ABS Guide for Hull Inspection and Maintenance Program (ABS HIMP Guide). Vessels enrolled in the program will be eligible for the HIMP class notation. This manual may also be used to assist with maintenance and repairs of IMO PSPC coatings for dedicated seawater ballast tanks and crude oil tanks per IMO Resolutions MSC.215(82) and MSC.288(87).

This hull inspection grading manual details a program for hull structural inspections to be performed by qualified inspectors in order to comply with the ABS HIMP Guide. It outlines the work scope and reporting requirements for this vessel, and contains the information to be collected by the vessel crew or superintendents. Staff executing the HIMP inspection regime are to be formally qualified by successfully completing the ABS approved HIMP training. The hull conditions are to be assessed and rated in accordance with a set of six general condition criteria coupled with selected targeted inspections of identified critical areas for this design series.

This manual draws on the information available from IMO, IACS and ABS publications. It is intended to support the sound judgment of qualified inspectors and assist owners with the development and application of a reliable maintenance program based on inspection and reporting techniques that are in conformance with the ABS HIMP Guide requirements.

2 • INSPECTION GRADING CRITERIA FOR ABS HIMP

This manual is to be used in conjunction with the following ABS publications:

• Guide for Hull Inspection and Maintenance Program

• Rules for Building and Classing Steel Vessels, Part 7: Surveys after Construction

• Guidance Notes on the Application and Inspection of Marine Coatings (2017)

• Guidance Notes on Maintenance and Repair of Protective Coatings (2017)

Attention should also be paid to the IACS and IMO guidelines for surveys, assessment and repair of hull structures.

The inspector is required to grade each particular zone based on each of the six criteria. The scoring for a particular zone should not be influenced by the scoring of other inspection criteria for that compartment.


—— INSPECTION CRITERIAThis manual provides six criteria covering different aspect conditions of the vessel inspected. These are to be documented based on a traffic light point rating system (0 through 6 scale) on “zones” of each compartment (space or tank). The score assigned to a compartment will denote the compartment’s condition as GOOD, FAIR or POOR, which is color-coded by green, yellow or red, respectively.

The six inspection criteria cover:

• Coating condition

• Presence of general corrosion

• Presence of pitting or grooving or other localized linear corrosion

• Presence of deformation

• Presence of fractures

• Compartment or space cleanliness (housekeeping and fabric maintenance such as anode replacement, etc.)

GOOD CONDITION

FAIR CONDITION

POOR CONDITION

Table 1. Traffic Light Condition Scoring


—— COATING CONDITIONThe definitions of coating conditions “GOOD”, “FAIR” and “POOR” in IMO Resolution A.744(18)/Annex B-1.2.9 and IACS UR Z10.1, Z10.3 and Z10.4 are as follows:

• GOOD: condition with only minor spot rusting

• FAIR: condition with local breakdown of coating at edges of stiffeners and weld connections and/or light rusting over 20% or more of areas under consideration, but less than as defined for POOR condition

• POOR: condition with general breakdown of coating over 20% or more of areas or hard scale at 10% or more of areas under consideration.

In order to achieve unified assessment of coating conditions, IACS Recommendation 87 provides a clarification of these definitions as follows:

• GOOD: Condition with spot rusting on less than 3% of the area under consideration without visible failure of the coating. Rusting at edges or welds, must be on less than 20% of edges or weld lines in the area under consideration.

• FAIR: Condition with breakdown of coating or rust penetration on less than 20% of the area under consideration. Hard rust scale must be less than 10% of the area under consideration. Rusting at edges or welds must be on less than 50% of edges or weld lines in the area under consideration.

• POOR: Condition with breakdown of coating or rust penetration on more than 20% or hard


rust scale on more than 10% of the area under consideration or local breakdown concentrated at edges or welds on more than 50% of edges or weld lines in the area under consideration.

Table 2 below summarizes the above definitions together with the inspection grading points used for the ABS HIMP program.

Table 2. Coating Inspection Criteria Point Scoring

Reg

ulat

ions

AB

S H

IMP

Pro

gra

m

Co

atin

g

Co

ndit

ion

Gra

din

g

Po

int

Co

ndit

ion

Co

mm

ent

Ris

k

Leve

lC

olo

r C

od

e

Go

od

0•

Exc

elle

nt c

oat

ing

wit

h ne

glig

ible

ind

icat

ion

of

coat

ing

fai

lure

Ver

y

Low

1•

Min

or

spo

t ru

stin

gLo

w

2

• S

po

t ru

stin

g w

itho

ut

visi

ble

co

atin

g f

ailu

re is

<

3%

of

the

area

und

er

cons

ider

atio

n;•

Rus

ting

is <

20

% o

f ed

ges

o

r w

eld

line

s.

Low

-M

ediu

m

Fai

r3

• B

reak

do

wn

of

coat

ing

or

rust

pen

etra

tio

n is

> 3

%

but

< 1

0%

of

the

area

;•

Har

d r

ust

scal

e is

< 5

% o

f th

e ar

ea;

• R

usti

ng in

the

are

a is

>

20

% b

ut <

35%

of

edg

es o

r w

eld

line

s.

Med

ium


Reg

ulat

ions

AB

S H

IMP

Pro

gra

m

Co

atin

g

Co

ndit

ion

Gra

din

g

Po

int

Co

ndit

ion

Des

crip

tio

nR

isk

Leve

lC

olo

r C

od

e

Fai

r4

• B

reak

do

wn

of

coat

ing

or

rust

pen

etra

tio

n is

>

10

% b

ut <

20

% o

f th

e ar

ea;

• H

ard

rus

t sc

ale

is >

5%

of

the

area

but

<

10

% o

f th

e ar

ea;

• R

usti

ng in

the

are

a is

> 3

5% b

ut <

50

% o

f ed

ges

or

wel

d li

nes.

Med

ium

-H

igh

Po

or

5

• B

reak

do

wn

of

coat

ing

or

rust

pen

etra

tio

n is

>

20

% b

ut <

30

% o

f th

e ar

ea;

• H

ard

rus

t sc

ale

is >

10

% b

ut <

20

% o

f th

e ar

ea;

• R

usti

ng in

the

are

a is

> 5

0%

but

< 7

5% o

f ed

ges

or

wel

d li

nes

Hig

h

6

• B

reak

do

wn

of

coat

ing

or

rust

pen

etra

tio

n is

>

30

% o

f th

e ar

ea;

• H

ard

rus

t sc

ale

is >

20

% o

f th

e ar

ea;

• R

usti

ng in

the

are

a is

> 7

5% o

f ed

ges

or

wel

d li

nes.

Ver

y H

igh

Table 2. Continued


Coating Assessment Scale – Surfaces

Assessment Scale for Breakdown

0.1%

1%

20%

Weld

Weld

Weld

10%

15%

20%

0.5%

10%

50%

0.2%

2%

25%

0.3%

5%

33%

Diagram for Pitting Linear Extent


Coating

Coating Condition

Points Condition CommentColor Code

Good 0 Freshly coated, negligible coating breakdown


Coating Condition


Good 1 Minor spot rusting


Coating Condition


Good 2 General breakdown of coating over 5%


Coating Condition


Fair 3Local breakdown at edges

of stiffeners and weld connections (uncoated)


Coating Condition


Fair 4 General breakdown of coating over 10%


Coating Condition


Poor 5 General breakdown of coating over 20%


Coating Condition


Poor 6 General breakdown of coating over 30%


—— GENERAL CORROSIONGeneral or overall corrosion appears as non-protective rust which can uniformly occur on tank internal surfaces that are uncoated, or where coating has totally deteriorated. The rust scale continually breaks off, exposing fresh metal to corrosive attack. Material thickness loss cannot be judged visually until excessive loss has occurred.


Co

rro

sio

n as

%

of

Zo

ne

Rat

ing

Po

ints

Co

ndit

ion

Co

mm

ent

Ris

k Le

vel

Co

lor

Co

de

0%

Exc

elle

nt0

No

rus

ting

Ver

y Lo

w

< 5

% L

ight

rus

tG

oo

d1

Neg

ligib

le r

usti

ng/c

orr

osi

on

Low

< 2

0%

Li

ght

rus

tG

oo

d –

F

air

2M

ino

r sp

ot

rust

ing

Low

–

Med

ium

> 2

0%

Li

ght

rus

t

> 5

% H

ard

sca

leF

air

3Lo

cal b

reak

do

wn

at e

dg

es o

f st

iffen

ers

and

wel

d c

onn

ecti

ons

and

/or

light

ru

stin

g o

ver

20%

or

mo

re o

f zo

neM

ediu

m

> 1

0%

Har

d

scal

eF

air

– P

oo

r4

Har

d s

cale

at

10%

or

mo

re o

f zo

neM

ediu

m –

H

igh

> 3

0%

Har

d

scal

eP

oo

r5

Ser

ious

/sig

nifi

cant

Co

rro

sio

n: M

ore

th

an 3

0%

co

rro

sio

n an

d a

ctiv

e

scal

e is

pre

sent

. Act

ive

scal

e is

loo

se

or

has

falle

n o

ff t

he s

truc

ture

Hig

h

> 7

0%

Har

d

scal

eW

ors

t6

Ext

ensi

ve a

rea

of

corr

osi

on:

co

rro

sio

n

of

hard

and

/or

loo

se s

cale

, inc

lud

ing

p

itti

ng, o

ver

70%

or

mo

re o

f th

e

pla

ting

sur

face

in q

uest

ion

ac

com

pan

ied

by

evid

ence

of

thin

ning

Ver

y

Hig

h

Table 3. General Corrosion Inspection Criteria Point Scoring


Corrosion Extent Diagrams – Edges and WeldsLocalized Corrosion Extent Diagrams

Linear Extent Diagrams

2% localized breakdown

15% scattered breakdown





5%

10%

20%

50%

80%

Co

rro

sio

n as

%

of

Zo

ne

Rat

ing

Po

ints

Co

ndit

ion

Co

mm

ent

Ris

k Le

vel

Co

lor

Co

de

0%

Exc

elle

nt0

No

rus

ting

Ver

y Lo

w

< 5

% L

ight

rus

tG

oo

d1

Neg

ligib

le r

usti

ng/c

orr

osi

on

Low

< 2

0%

Li

ght

rus

tG

oo

d –

F

air

2M

ino

r sp

ot

rust

ing

Low

–

Med

ium

> 2

0%

Li

ght

rus

t

> 5

% H

ard

sca

leF

air

3Lo

cal b

reak

do

wn

at e

dg

es o

f st

iffen

ers

and

wel

d c

onn

ecti

ons

and

/or

light

ru

stin

g o

ver

20%

or

mo

re o

f zo

neM

ediu

m

> 1

0%

Har

d

scal

eF

air

– P

oo

r4

Har

d s

cale

at

10%

or

mo

re o

f zo

neM

ediu

m –

H

igh

> 3

0%

Har

d

scal

eP

oo

r5

Ser

ious

/sig

nifi

cant

Co

rro

sio

n: M

ore

th

an 3

0%

co

rro

sio

n an

d a

ctiv

e

scal

e is

pre

sent

. Act

ive

scal

e is

loo

se

or

has

falle

n o

ff t

he s

truc

ture

Hig

h

> 7

0%

Har

d

scal

eW

ors

t6

Ext

ensi

ve a

rea

of

corr

osi

on:

co

rro

sio

n

of

hard

and

/or

loo

se s

cale

, inc

lud

ing

p

itti

ng, o

ver

70%

or

mo

re o

f th

e

pla

ting

sur

face

in q

uest

ion

ac

com

pan

ied

by

evid

ence

of

thin

ning

Ver

y

Hig

h


Corrosion

Corrosion as % of Zone


0% 0 No rusting




< 5% Light rust 1 Negligible rusting/

corrosion




< 20% Light rust 2 Minor spot rusting




> 20% Light rust

> 5% Hard scale

3

Local breakdown at edges of stiffeners and

weld connections and/or light rusting over 20% or

more of zone




> 10% Hard scale 4 Hard scale at 10% or more

of zone




> 30% Hard scale 5

Serious/significant corrosion: More than 30% corrosion and active scale is present. Active scale is loose or has fallen off the

structure.




> 70% Hard scale 6

Extensive area of corrosion: Corrosion of hard and/or loose scale, including

pitting, over 70% or more of the plating surface in

question accompanied by evidence of thinning


—— PITTING AND GROOVING CORROSION

Localized corrosion can occur on bottom plating, other horizontal surfaces and at structural details that trap or follow the flow of water and other fluids, particularly in aft bays of tank bottoms and in the region of suction bell mouths. For coated surfaces, the attack produces deep and relatively small diameter pits that can lead to penetration of the steel member in isolated random places in the tank.

Pitting of uncoated tanks, as it progresses, forms shallow but very wide scabby patches (e.g. 300 mm diameter). The appearance resembles a condition of general corrosion. Pitting is usually seen on horizontal hull parts such as the inner bottom or stringers.

Grooving is a localized, linear corrosion that occurs at structural intersections in welds or heat affected zones. This corrosion is sometimes referred to as “in line pitting attack” and can also occur on vertical members and flush sides of bulkheads in way of flexing. Grooving or “necking” is usually seen on the butt/seam welds and weldments of stiffeners to plating. In particular, pitting is found below the suction bell mouths in ballast tanks.


Pit

ting

/ G

roov

ing

Ty

pe

Rat

ing

Po

ints

Pit

ting

and

G

roov

ing

Dep

thIn

tens

ity

(% o

f Z

one

)R

isk

Leve

lC

olo

r C

od

e

No

Pit

s/

Gro

oves

E

xcel

lent

0—

—V

ery

Low

Sha

llow

P

its/

G

roov

esG

oo

d1

Less

tha

n 1/

3 o

f o

rig

inal

th

ickn

ess

< 5

%Lo

w

Sha

llow

P

its/

G

roov

es

Go

od

–

Fai

r2

Less

tha

n 1/

3 o

f o

rig

inal

th

ickn

ess

< 1

5%Lo

w –

M

ediu

m

Sha

llow

P

its/

G

roov

esF

air

3Le

ss t

han

1/3

of

ori

gin

al

thic

knes

s>

15%

Med

ium

Dee

p P

its/

G

roov

esF

air

– P

oo

r4

Mo

re t

han

1/3

of

ori

gin

al

thic

knes

s<

15%

Med

ium

–

Hig

h

Dee

p P

its/

G

roov

esP

oo

r5

Mo

re t

han

1/3

of

ori

gin

al

thic

knes

s>

15%

Hig

h

Dee

p P

its/

G

roov

esW

ors

t6

Less

tha

n 6

mm

of

ori

gin

al

thic

knes

s re

mai

ning

—V

ery

Hig

h

Table 4. Pitting and Grooving Inspection Criteria Point Scoring


Pitting and Grooving

Pitting/ Grooving

TypePoints Pitting and

Grooving Depth

Intensity (% of Zone)

Color Code

No Pits/ Grooves 0 — —


Pitting/ Grooving


Grooving Depth


Color Code

Shallow Pits/

Grooves1

Less than 1/3 of original thickness

< 5%


Pitting/ Grooving


Grooving Depth


Color Code

Shallow Pits/

Grooves2


< 15%


Pitting/ Grooving


Grooving Depth


Color Code

Shallow Pits/

Grooves3


> 15%


Pitting/ Grooving


Grooving Depth


Color Code

Deep Pits/

Grooves4

More than 1/3 of original thickness

< 15%


Pitting/ Grooving


Grooving Depth


Color Code

Deep Pits/

Grooves5

More than 1/3 of original thickness

> 15%


Pitting/ Grooving


Grooving Depth


Color Code

Deep Pits/

Grooves6

Less than 6 mm of original thickness remaining

—


—— DEFORMATIONDeformation is caused by impact loads, contact or overloading. Deformation may be local (deformation of panel or stiffener) or global (deformation of a beam, frame, girder or floor, including associated plating). Permanent buckling is easily identified and may result from overloading, reduction of thickness due to corrosion or contact damage. Elastic buckling may be identified from coating damage, stress lines and/or shedding of scale.

The panel is defined as the area between adjacent transverse frames and adjacent longitudinal stiffeners. A bay is the area between adjacent transverse frames from longitudinal bulkhead to longitudinal bulkhead (or side shell).


Set

-in

Are

aS

et-i

n D

epth

Rat

ing

Po

ints

Co

ndit

ion

Co

mm

ent

Ris

k Le

vel

Co

lor

Co

de

No

Def

orm

atio

n—

Exc

elle

nt0

No

def

orm

atio

nV

ery

Low

Wit

hin

Pan

el<

75

mm

(3

in)

Go

od

1G

rad

ual s

et-i

nLo

w

Wit

hin

Pan

el>

75

mm

(3

in)

Go

od

–

Fai

r2

Gra

dua

l set

-in

Low

–

Med

ium

Wit

hin

Bay

(m

ulti

ple

pan

els)

< 7

5 m

m

(3 in

)F

air

3S

et-i

n w

ith

asso

ciat

ed in

tern

als

trip

ped

Med

ium

Bra

cket

s an

d

Inte

rnal

s Tr

ipp

edF

air

– P

oo

r4

Trip

ped

and

b

uckl

ed in

tern

als

and

bra

cket

s

Med

ium

–

Hig

h

Wit

hin

Bay

> 7

5 m

m

(3 in

)P

oo

r5

Buc

kled

, ind

ente

d,

trip

ped

inte

rnal

sH

igh

Mul

tip

le B

ays

—W

ors

t6

Buc

kled

, hea

vily

in

den

ted

, tri

pp

ed

inte

rnal

s

Ver

y

Hig

h

Table 5. Deformation Inspection Criteria Point Scoring


Deformation

Set-in Area Set-in Depth Points Condition

CommentColor Code

No Deformation — 0 No

deformation



CommentColor Code

Within Panel < 75 mm (3 in) 1 Gradual

set-in



CommentColor Code

Within Panel > 75 mm (3 in) 2 Gradual

set-in



CommentColor Code

Within Bay (multiple panels)

< 75 mm (3 in) 3

Set-in with associated internals tripped



CommentColor Code

Brackets and Internals Tripped 4

Tripped and buckled internals

and brackets



CommentColor Code

Within Bay > 75 mm (3 in) 5

Buckled, indented, tripped internals



CommentColor Code

Multiple Bays — 6

Buckled, heavily

indented, tripped internals


Fracture Location Points Condition

CommentRisk Level

Color Code

No Fractures 0 No fractures Very

Low

Welds 3

Weld fractures in support

brackets, internals, detachments

Low – Medium

Flanges 3Flanges of

brackets, internals, stiffeners

Medium

Webs 4

Webs of frames, floors, brackets,

stiffeners, internals

Medium – High

Bulkheads 5

Transverse and longitudinal bulkheads,

primary structure members

High

Hull Envelope

(Shell) 6 Sideshell,

bottom and deckVery High

—— FRACTUREFractures are categorized by a different point system based on the location of the fracture and that local structure’s contribution to overall hull integrity. A fracture of the toe welds of brackets and flanges of brackets, stiffeners or webs is given 3 points. The fractures to the web plating of frames, floors and stiffeners are given 4 points. Fractures to transverse bulkheads and longitudinal bulkheads are given 5 points. Any fracture to the external hull envelope is treated as the worst case and given 6 points.

Table 6. Fracture Inspection Criteria Point Scoring


Fracture

Fracture Location Points Condition Comment Color

Code

No Fractures 0 No fractures



Code

Welds 3Weld fractures in support

brackets, internals, detachments



Code

Flanges 3 Flanges of brackets, internals, stiffeners



Code

Webs 4 Webs of frames, floors, brackets, stiffeners, internals



Code

Bulkheads 5Transverse and longitudinal

bulkheads, primary structure members



Code

Hull Envelope

(Shell)6 Sideshell, bottom and deck


—— CLEANLINESS AND HOUSEKEEPINGThis criteria is used to evaluate the general condition of the compartment for cleanliness and housekeeping. This should be judged based on the following:

• Amount of the sediments and dredge/sludge remaining in the tank

• Wastage of the anodes and their perceived effectiveness

• General cleanliness of the space

• Condition of the piping and its supports

• Condition of access hatches, manholes, entry spaces, ladders and other means of access

• Loose scale and plugged drainage openings in the structure (e.g., rat holes/scallops)


Cle

anlin

ess

and

H

ous

ekee

pin

gR

atin

gP

oin

tsC

ond

itio

n C

om

men

tR

isk

Leve

lC

olo

r C

od

eC

lean

and

exc

elle

nt

cond

itio

nE

xcel

lent

0S

imila

r to

new

ly b

uilt

co

ndit

ion

Ver

y Lo

w

Ver

y lig

ht, n

eglig

ible

laye

r o

f re

sid

ue a

nd s

edim

ents

Go

od

1A

nod

es in

go

od

co

ndit

ion

mo

re

than

90

% r

emai

ning

Low

Lig

ht la

yer

of

resi

due

, se

dim

ents

insp

ecti

ons

Go

od

–

Fai

r2

Ano

des

75%

rem

aini

ng. C

lean

ing

no

t re

qui

red

for

clo

se-u

p.

Low

–

Med

ium

Sp

aces

suffi

cien

tly

clea

n an

d

free

fro

m w

ater

, sca

le, d

irt,

co

ntai

ner

resi

due

s, e

tc. t

o

reve

al c

orr

osi

on,

def

orm

atio

n,

frac

ture

s, d

amag

es o

r o

ther

st

ruct

ural

det

erio

rati

on

Fai

r3

Ano

des

50

% r

emai

ning

. M

eani

ngfu

l exa

min

atio

n is

p

oss

ible

and

may

req

uire

so

me

loca

l cle

anin

g.

Med

ium

Sp

aces

wit

h su

rfac

es

cont

aini

ng lo

ose

ac

cum

ulat

ed c

orr

osi

on

scal

e

Fai

r –

Po

or

4A

nod

es 3

0%

rem

aini

ng. W

ater

, sc

ale,

dir

t, c

ont

aine

r re

sid

ues,

etc

, w

hich

mak

e ex

amin

atio

n d

ifficu

lt.

Med

ium

–

Hig

h

Sp

aces

wit

h re

sid

ue a

nd

sed

imen

ts w

hich

do

no

t g

ive

acce

ss t

o s

urfa

ces

Po

or

5A

nod

es n

ot

effec

tive

. M

eani

ngfu

l exa

min

atio

n no

t p

oss

ible

wit

hout

cle

anin

g.

Hig

h

In a

dd

itio

n to

ab

ove,

sp

aces

w

ith

mea

ns o

f ac

cess

and

en

try

not

safe

Wo

rst

6C

atho

dic

pro

tect

ion

syst

ems

ineff

ecti

ve. C

om

par

tmen

t ne

eds

to b

e m

ade

safe

fo

r en

try.

Ver

y H

igh

Table 7. Cleanliness and Housekeeping Inspection Criteria Point Scoring


Cleanliness and Housekeeping

Cleanliness and Housekeeping Points Condition Comment Color

Code

Clean and excellent condition

0 Similar to newly built condition



Code

Very light, negligible layer of residue and

sediments

1Anodes in good

condition, more than 90% remaining



Code

Light layer of residue, sediments

2Anodes 75% remaining. Cleaning not required

for close-up.


Cleanliness and Housekeeping Points Condition

CommentColor Code

Spaces sufficiently clean and free

from water, scale, dirt, container

residues, etc. to reveal corrosion, deformation or other structural

deterioration

3

Anodes 50% remaining. Meaningful

examination is possible and may

require some local cleaning.



Code

Spaces with surfaces

containing loose accumulated

corrosion scale

4

Anodes 30% remaining. Water,

scale, dirt, container residues, etc. which make examination

difficult.



Code

Spaces with residue and

sediments which do not give access

to surfaces

5

Anodes not effective.

Meaningful examination not

possible with cleaning.



Code

In addition to all other conditions,

spaces with means of access and entry not safe

6

Cathodic protection systems ineffective.

Compartment needs to be made

safe for entry.


—— NOTIFYING SUPERINTENDENT AND CLASS SURVEYORAll deformation or fractures discovered during inspection should be brought to the attention of the superintendent (owner’s representative) and the attending class surveyor at the first opportunity. When a compartment transitions from good to fair condition, the class surveyor should be alerted at the next survey. When a compartment transitions to poor condition, class surveyor attendance should be requested at the next port of call.

Having a comparison of the normalized total scores enables the owner to rank like compartments in terms of the overall condition. Such a ranking may further enable a class surveyor to focus surveys in compartments where anomalies and higher scores have been identified.

Table 8. Suggested Notification Thresholds

Inspection Criteria Notify Superintendent

Coating Condition > 3 points

General Corrosion > 3 points

Pitting and Grooving Corrosion > 3 points

Deformation > 0 points

Fracture > 0 points

Cleanliness and Housekeeping > 3 points

08/17 17176

CONTACT INFORMATION

ABS WORLD HEADQUARTERSTel: 1-281-877-6000 • Fax: 1-281-877-5976Email: [email protected]

ABS AMERICAS DIVISIONTel: 1-281-877-6000 • Fax: 1-281-877-5943Email: [email protected]

ABS EUROPE DIVISIONTel: 44-20-7247-3255 • Fax: 44-20-7377-2453Email: [email protected]

ABS GREATER CHINA DIVISIONTel: 86-21-2327-0888 • Fax: 86-21-6322-9649Email: [email protected]

ABS PACIFIC DIVISIONTel: 65-6276-8700 • Fax: 65-6276-8711Email: [email protected]

www.eagle.org

© 2017 American Bureau of Shipping. All rights reserved.

Documents

INSPECTION GRADING CRITERIA FOR THE ABS HULL INSPECTION … · 2020-04-22 · NOTICE This manual and the inspection regime described herein are for use to comply with the ABS Hull