HALONG SHIPYARD QUALITY STANDARD BOOK 1

VIET NAM SHIPBUILDING INDUSTRY COrPORATION HA LONG SHIPBUILDING COMPANY

HA LONG SHIPBUILDING COMPANY

QUALITY STANDARD BOOK 1

H¹ LONG 2006 -0-

HALONG SHIP BUILDING Co.

preface

This HLSQS describes the quality standards and the inspection practice which are applied during repair and building ship process in HA LONG SHIPBUILDING Co.

This document is intended to provide standard instructions to Ship Owners, Class Surveyors, QC, inspectors, and the production workers, aiming that proper quality level is maintained during repair and building ship process and eliminating any possible, disputes among them.

The contents of this documents are applied for all kinds of cargo ships, barges, drilling rigs & special purpose etc. unless additional requirement are specified in the contract specifications.

-1-

HALONG SHIP BUILDING Co.

* * contents * *

* * contents * * Part i:

quality standard …………………………… 1 1. hull construction 2. hull out fittings 3. machinery & out fittings 4. piping system 5. painting part 6. electric part

part II: inspection practice …………………………… 155 1. hull inspection 2. out fittings inspection 3. machinery inspection 4. piping inspection 5. electric inspection 6. painting inspection 7. list of inspection/test

part III

N.D.E technique...................................................... 210

part IV

appendix – I .............................................................. 225

part V

appendix - II ............................................................ 256 -2-

HALONG SHIP BUILDING Co.

part I

quality standard

-3-

Halong shipbuilding co.

HALONG SHIP BUILDING Co.

Section 1

Hull construction

1.1 material ........................................................................................... 5 1.2 gas cutting ..................................................................................... 7 1.3 fabrication..................................................................................... 9 1.4 deformation................................................................................... 12 1.5 accuracy of hull form ........................................................... 15 1.6 welding ............................................................................................. 17 1.7 alignment & finishing............................................................... 20 1.8 welding technique ..................................................................... 30

-4-

HALONG SHIP BUILDING Co.

section I

Hull construction

* shipbuilding & repair

1.1 Material 1.1.1 Surface flaw 1) Pit Item

Remarks 1. Grade A: Repair is unnecessary 2. Grade B: 1) Outer surface of shell plates. To be repaired by grinding if necessary. When painting with epoxy can not be done, grinding is to be carried out. 2) Others: Repair unnecessary. 3. Grade C: To be repaired by grinding 4. Grade D: Repair method is to be determined after discussion with owner and class. * Recommended repair method: Grinding followed by welding. Area ratio (%) =

Area of pit x100 Total area of a plate

2) Flaking: Item

Remarks 1. Grade A: Repair is unnecessary 2. Grade B: Repair if necessary. 3. Grade C: Repair is necessary * Repair method (d=depth of defects ) 1) d  0.07t (max 3mm)- Grinding 2) 0.07t < d  0.2t: Welding and grinding ( The welded area should be less than 2% of the total area of a plate ).

-5-

HALONG SHIP BUILDING Co.

Section 1

Hull construction

* shipbuilding & repair

3) Other defects Item

Remarks 1. Grade A: Repair is unnecessary. 2. Grade B: Repair is necessary. * Repair method (d=depth of defects ) 1) d  0.07t (max 3mm): Grinding. 2) 0.07t < d  0.2t: Welding and grinding. ( The welded area should be less than 2% of the total area of a plate ).

1.1.2) Lamination Item

Remarks

Local

In case where the range lamination is

lamination

limited, it can be chipped out and built up by welding as shown in ( a ). In case where the range of lamination is limited, also but is near the plate surface, it is preferable to make the built up welding as shown in ( b ).

Severe

It is recommended to renew the plate

lamination

locally, in case where the range of

requiring a local

lamination is fairly extensive.

renew of a plate

The standard minimum breadth of a plate to be renewed is as below. 1) Shell and strength deck under large constraint : 1600mm 2) Not under large constraint: 800mm 3) Other structural members: 300mm.

-6-

HALONG SHIP BUILDING Co.

Hull construction

Section 1

* shipbuilding

1.2 Gas cutting. 1.2.1 Notches.

Unit: mm Standard range

Item Free edges

Tolerance limits

1) Upper edges of sheer strake. 2) Strength deck within 0.6L

Indentation  0.5

and free

edges of opening of shell plate. 3) Main longitudinal strength members. Indentation  1.0

Longitudinal and transverse strength members.

Indentation  3

Others Weld grooves

Butt welds

Indentation  2

Shell plate and upper deck within 0.6L

Indentation  3

Others

Indentation  3

Fillet welds

Section 1.

Hull construction

* ship repair

1.2.1 Notches for repair ship

Unit: mm

Standard rang

Item

Tolerance limits

1) Upper edges of sheer strake 2) Strength deck within 0.6L Free edges

and

free edges of opening of shell plate.

Indentation  1.0

3) Main longitudinal strength member. Longitudinal transverse strength

Indentation  1.5

Others

Indentation  3 Shell plate and upper deck

Weld grooves

Butt welds

within 0.6L

Indentation  2 Indentation  3

Others.

Indentation  3

Fillet welds

-7-

HALONG SHIP BUILDING Co.

Section 1

Hull construction

* shipbuilding

1.2.2 Dimensions

Standard range

Item

Tolerance limits

L 3d Length of taper ( L)

Depth of grooves General members compared with correct Sizes of members

ones. Depth of floors and girders in double bottom Breadth of face bars

Section 1

 0.5d

 1.0d

 1.5

 2.0

 3.5

 5.0

 2.5

 4.0

 2.0

3.0~4.0

Hull construction

* ship repair

1.2.2 Dimension for repair ship.

Standard range

Item

Tolerance limits

L 3d Length of taper (L)

Depth of grooves

-8-

 0.5d

 0.1d

 2.0

 3.0

HALONG SHIP BUILDING Co.

Section 1

Hull construction

* shipbuilding & repair

1.3 Fabrication. 1.3.1 Flange longitudinals

Unit: mm

Standard range

Item Breadth of webs and flanges

Angle between flange and webs

Tolerance limits

 3.0

 5.0

 2.5

 4.5

 10

 25

 10

 25

Compared with template per 100mm in breadth of flanges

Curvature or straightness in the plane of flanges Per 10m in length Curvature of straightness in the plane of webs. Per 10m in length 1.3.2 Flange brackets.

Standard range

Item

Tolerance limits

Breadth of webs and

 3.0

 5.0

 3.0

 5.0

flanges Angle between flanges and webs

Compared with template per 100mm in breadth of flanges. -9-

HALONG SHIP BUILDING Co.

Section 1

Hull construction

* shipbuilding

1.3.3 Built-up plate.

Unit: mm

Standard range

Item

Tolerance limits

Deviation of face plates Frames and

 1.5

 3.0 per

longitudinals

per 100mm

100mm

b 100

a  5

Distortion of face

a  3

plates

Section 1

Hull construction

b 100

* ship repair

1.3.3 Built – up plates for repair ship

Unit: mm

Standard range

Item

Tolerance limits

Deviation of face plates Fames and

 3.0 per

 5.0 per

longitudinals

100mm

100mm

Distortion of face

a  3 .5 

plates

- 10 -

b 100

a  6

b 100

Section 1

HALONG SHIP BUILDING Co.

Hull construction

* shipbuilding & repair

1.3.4 Line heating method

Standard range

Item Water cooing just after heating

* 50 HT

Air cooling after heating

Tolerance limits

Under 6500C

Under 9000C

* TMCP Type 50HT

Under 9000C

(Ceq>0.38%)

(Starting Air cooling and subsequent water

temperature of

cooling after heating

water cooling to be under 5000C)

* TMCY Type 50HT

Water cooling just after heating or

(Ceq 0.38%)

air cooling

Under 1000C

* AH~DH * TMCP Type 50HT

Water cooling just after heating or

(Ceq 0.38%)

air cooling.

Under 900oC

* EH 1.3.5. Line heat/ cool’ cycles.

Item TMCP Type 50HT (AH - DH) TMCP Type 50HT (EH)

Remark Within 3 cycles as far as practicable Within 2 cycles as far as practicable

Others

Not defined

- 11 -

HALONG SHIP BUILDING Co.

Section 1

Hull construction

* shipbuilding

1.4 Deformation 1.4.1.Unfairness

Unit: mm

Standard Tolerance range limits

Item Shell plates

Parallel part ( side )

4

6

Standard and/or

Parallel part ( bottom )

4

6

tolerance limits

Fore and aft part

5

7

are to be applied

4

6

Double bottom tank top plates Transverse bulkheads, Swash

per each frame, longitudinal and stiffener space

Longitudinal bulkheads, Bulkheads

Remarks

6

8

respectiveily. Where above is

bulkheads. Parallel part within 0.6L

4

6

not applicable , it

Fore and aft part

6

9

is to be applied

Covered part

7

9

per 1.8m in

Bare part

6

8

length.

Covered part

7

9

Forecastle deck,

Bare part

4

6

Poop deck.

Covered part

7

9

Super structure

Bare part

4

6

deck

Covered part

7

9

Lift-able

10

12

Fixed

6

8

8

10

Outside walls

4

6

Inside walls

4

6

Covered part

7

9

Webs of girders, transverses

5

7

6

8

Strength deck

Second deck

Car deck Intermediate deck Deck house wall

Interior members

Floors and girders in double bottom

- 12 -

(Where above space is over 1.8m paragraph 1.4.2 is to be applied)

HALONG SHIP BUILDING Co.

Section 1

Hull construction

* ship repair

1.4.1 Unfairness for repair ship

Standard Tolerance range limits

Item Shell plate

Parallel part side

4

6

Standard and/or

Parallel part bottom

4

6

tolerance limits

Fore and aft part

5

7

are to be applied

6

6

Double bottom tank top plates Bulkheads

Remarks

longitudinal and stiffener space

Longitudinal bulkheads transverse bulkheads, Swash

per each frame,

6

8

respectiveily. Where above is

bulkheads. Paralleled part with in 0.6L

4

6

not applicable , it

Fore and aft part

6

9

is to be applied

Covered part

7

9

per 1.8m in

Bare part

6

8

length.

Covered part

7

9

Forecastle deck,

Bare part

4

6

poop deck

Covered part

7

9

Super structure

Bare part

4

6

deck

Covered part

7

9

Car deck

10

12

Intermediate

8

10

Outside walls

4

6

Inside walls

4

6

Covered part

7

9

5

7

6

8

Strength deck

Second deck

Deck house wall

Interior member

Webs of girders, trans.

Floors and girders in double bottom

- 13 -

(Where above space is over 1.8m paragraph 1.4.2 is to be applied))

HALONG SHIP BUILDING Co.

section I

Hull construction

1.4.2 Deformation per basic length

Unit: mm

Standard Tolerance range limits

Item Shell plates

* shipbuilding & repair

Parallel part Fore and aft part

Decks, Double bottom tank tops

2L/1.000

3L/1.000

3L/1.000

4L/1.000

3L/1.000

4L/1.000

Remarks Deformation per basic length means the deformation measured between one transverse space.

Bulkheads

4L/1.000

5L/1.000

For cabin walls and

Cabin walls

2L/1.000

3L/1.000

curtain plates, the basic

Curtain plates

2L/1.000

3L/1.000

1.4.3 Distortion

Unit: mm

Distortion of girder and transverses at the

Per span

5

8

L 1000

5

8

part of upper edge and flange. Distortion of longitudinals,

10005

joints

Refitting.

- 26 -

HALONG SHIP BUILDING Co.

Section 1

Hull construction

* shipbuilding & repair

1.7.5 Alignment Item Butt joints

Tolerance limits Strength

a 0.15t1,

a>0.15t1, or a>3

members

(max.3)

Refitting

a 0.2t1

a>0.2t1, or a>3

(max.3)

Refitting

Others a: Difference t1 t2 Fillet joints

Strength

a 1/3t

members

1. 1/3t11/2t1: Refitting

t1

* For members having small breadth ( i.e.

t2

face plate of built-up member ), doublers or carling can be attached after discussion with owner & class. Others

a 1/2t1

a>1/2t1 Refitting

- 27 -

HALONG SHIP BUILDING Co.

Section 1

Hull construction

* shipbuilding & repair

1.7.5 Alignment Item

Tolerance

Remarks

Flange width s 0.04b

If s 0.08b

max. 8mm

Grind corners to smooth. Taper over

Alignment of butt

distance min.

joints in stiffeners

L=30s If s>0.08b release and adjust over distance min. L=50s

Overlap brackets, gap before manual welding

For weld

If s 5mm

throat

Parts may be pulled

thickness

together and welded

a 4mm

If s>5mm

Gap s 2mm

Release and adjust

for a>4mm s 3mm

- 28 -

HALONG SHIP BUILDING Co.

Section 1

Hull construction

* shipbuilding & repair

1.7.5 Alignment Item Openings for

Tolerance

1. Position of nearest scallop

Remarks If d>75mm

stiffeners passing

The nib between scallop

through girder webs

and opening to be cut, and lug to be welded to d 75mm

2. Gap

plating, see figure

s 5mm. Weld throat thickness to be increased by one weld bead or 2mm. If 510mm. Cut off nib and fit lug of same height as nib.

s 3mm

Sufficient for weld access.

- 29 -

HALONG SHIP BUILDING Co.

Section 1

Hull construction

* shipbuilding & repair

1.8 Welding technique 1.8.1 Welding sequence 1. Welding sequence is to be carefully planned for each structural member. So that the parts can be jointed freely without any deformation or residual stress after welding. 2. Welding sequence for each part actually have some varieties depending upon the surrounding circumstances, but in principle, the following sequences are to be kept at every welding stages. 1) Welding is proceeded symmetrically from center of joint both sides. E. G. incase of erection joint. Welding should be done from a mid-ship to stem or stern and from center line of the ship to the direction of side shell. 2) The part where the deformation or residual stress is anticipated to be welded first, and then others to be done secondly. 3. Welding sequence is generally adopted from be assembly stage. 1) Welding of panel.

2) Butt joints are welded prior to welding of seam line.

- 30 -

HALONG SHIP BUILDING Co.

Section 1

Hull construction

* shipbuilding & repair

2) Welding of profiles on panel

Note that a release length of 100mm is provided in the horizontal seams at each corner of the insert plate. 1. Weld framing to within 100mm of un-welded butts and seams. 2. Weld vertical butt

complete

3. Weld vertical butt

complete

4. Weld un-welded framing in way of vertical butts 5. Weld horizontal seam

including release lengths

6. Weld horizontal seam

including release lengths

7. Weld un-welded framing in way of horizontal seams

- 31 -

HALONG SHIP BUILDING Co.

Section 1

Hull construction

3) Welding of insert

- 32 -

* shipbuilding & repair

HALONG SHIP BUILDING Co.

Section 1

Hull construction

4) Penetration parts

- 33 -

* shipbuilding & repair

HALONG SHIP BUILDING Co.

Section 1

Hull construction

* shipbuilding & repair

1.8.2 Slot welding Symbol

Application for thickness

Kind of plate All

t 50.5

w=t t+8 2.25w t225

II

225 - 97 -

and or and or and or and

350 >150 150 >400 400 >400 400

section 4

HALONG SHIP BUILDING Co.

piping system

Heat transfer

I

>225

oil

II

225

I

>225

II

225

Hydraulic fluid

* piping grade

or

>400

And

400

Or

>400

And

400

Flammable or combustible dangerous cargoes ..... Refer to specific requirements of Part 40 of this chapter. Other dangerous cargoes .... Refer to specific requirement of part 98 of this chapter. 1. Where doubt exists as to proper classification, refer to the Commandant for resolution. 2. For definitions, see 46 C. F. R Part 30, 151. Note that the category “B” and “C” poison is not used in the rules applying to self Propelled vessels ( 46 CFR Part 153 ). 3. Not permitted except inside cargo tanks approved for Class B and C poison. ( 5 ) D. N. V Piping

Class I

Class II

system

p/bar

0

tC

0

Steam, Fuel

>16

Or >300

16

300

7

170

oil, Other

>16

Or >150

16

150

7

60

media

>40

Or >300

40

300

16

200

p/bar

tC

Class III p/bar

t0C

p: Design pressure, as defined in Sec. 6 A303 t: Design temperature, as defined in Sec.6 A303 1) For Class II and III piping both specified conditions are to be met, for Class I piping one condition only is sufficient. 2) Air, Water, lubricating oil and hydraulic oil. 3) Cargo oil and open ended pipes ( drains, overflows, vents, boiler escape pipes, ... etc ) independently of the pressure and temperature, are pertaining to class III. 4) Thermal oil pipes independently of temperature and pressure are pertaining to class I. 5) Hyd’ oil piping in engine room with design pressure above 40bar are pertaining to class II.

- 98 -

HALONG SHIP BUILDING Co.

section 4

piping system

4.2 Pipe fabrication

* Fabrication

Unit: mm Item

Standard range

Tolerance limits

d=  4

1)Dimension (1) Straight pipe

Not defined

d=  5

(2) Bending pipe

d   10

1   2  2 0

Not defined

(Two dimensional bending )

d=  5 d   10

Not defined

(Three dimensional bending ) (3) Branch pipe

d=  4 d   10

Not defined

(4) Penetration piece

d=  4 d   10 Not defined

- 99 -

HALONG SHIP BUILDING Co.

section 4

piping system

* Fabrication Unit: mm

Item

Standard range

Tolerance limits

2) Attachment of flange to pipe (1) Angle of flange to pipe a 2

Not defined

(2) Distortion of flange face D>200 a 0.5

3.2 t < t1

S = 2 1

a 1.6 B =1.6  0.8  : Refer to  1 or  2

Specified above. 3

t >3.2

Pipe to pipe or

a>1.6

Pipe to fitting

 : Refer to  1 or  2

Specified above t >3.2

- 110 -

HALONG SHIP BUILDING Co.

Section 4

piping system

* hull piping

4.6.2 Weld profiles and tolerance limit for piping ( 1 ) Jointing and welding shall be carried out to have satisfactory weld profiles. ( 2 ) Tolerance limits and repair procedures are as follows. Item

Tolerance

Methods

Limit

Repair procedure When the depth of under

Under cut

D

0.8 mm

cut exceeds the limitation, to be repaired by welding with small dia, electrodes.

All pipes 

10

When the tolerance exceeds the limitation, flange to be refitted.

D: Pipe N/D

Alignment

D450:

a 2.5mm

L 5mm

Dimension

- 111 -

When the tolerance exceeds the limitation, flange to be renewed.

Section 4

HALONG SHIP BUILDING Co.

piping system

* hull piping

4.6.3 Filet weld ( 1 ) Pipe to flange W: 1.5t but not less than 5mm. C: Maximum 2mm ( not to be tight fit ), but sum of the clearances diametrically opposite is to exceed 5mm. *

t1 : but need not to exceed 0.3T

( 2 ) Pipe to sleeve W : Refer to page 52/86. C : See “ C “ value of pipe to flange weld. * Mark part to be at least 9.5mm

( 3 ) Welding to structure ( for pipe penetration piece ).

- 112 -

Section 4

HALONG SHIP BUILDING Co.

piping system

* hull piping

4.7 PVC A/B class penetration piece type in accommodation * Application : A/B – class steel deck/ bulkhead penetration for PVC pipe.

Pipe

Steel sleeve

H

L

e

50

60

89.1

78.1

6.0

65

76

114.3

102.3

126.6

6.6

75

89

139.8

126.6

151.0

7.1

100

114

165.2

151.0

N.D

O.D

D

d

t

N.D

50

60

89.1

78.1

5.5

65

76

114.3

102.3

75

89

139.8

100

114

165.2

Note : 1) “ PANDA-90” fire sleeve transit device for the penetration of A or B class division for PVC pipe. 2) Noncombustible material certificate of PANDA -90 fire sleeve. LR: SVG/F91/355 DNV: F-11314 ABS: 91-BK-27245-X KR: BU-02901/03 BV: 5031/5042/A1/0 GL: 67951 HH 3 ) *** Mark : PANDA-90 length 180mm, steel sleeve 200mm.

- 113 -

HALONG SHIP BUILDING Co.

Section 4

piping system

* hull piping

4.8 Pipe support for steel and PVC pipe in accommodation 1) Standard distance of steel and PVC pipe ( 1 ) Distance ( interval ) of pipe supports to be based on the flowing table, but may be increased up to the maximum 1.2 times of the standard distance in consideration of hull structure. Steel pipe

PVC pipe

Nom. dia

Out dia.

Distance

Nom. dia.

Out dia.

Distance

(A)

(mm)

(m)

(A)

(mm)

(m)

15

21.7

1.0

20

27.2

1.5

25

34.0

1.5

32

42.7

1.5

40

48.7

2.5

40

48

1.0

50

60.5

2.5

50

60

1.0

65

76.3

2.5

65

76

1.2

80

89.1

3.2

75

89

1.2

100

114.3

3.2

100

114

1.5

125

139.8

3.2

125

140

1.5

150

165.2

3.9

Remark

L=1.2S (L: Maximum allowable distance of pipe supports. S: Standard distance of pipe supports )

Note: Theoretical criteria is guided by a limitation of about 3mm deflection with piping filled fully between pipe supports one another. ( 2 ) Stays for pipe supports to be fitted on or close to stiffening beam as far as possible. ( 3 ) Stays for pipe supports to be sniffed to avoid sharp ends and to be paint finished.

- 114 -

HALONG SHIP BUILDING Co.

Section 4

piping system

* Hyd-line design

4.9 Pipe grade of hyd-line Symbol JIS G 3452

Grade/ name SGP

Range of applicable LOW PRESS SYSTEM * Pump suction pipe MIDDLE PRESS SYSTEM

JIS G 3454

STPG

HIGH PRESS SYSTEM * SEAM LESS PIPE

JIS G 3455

STS

Remark

HIGH PRESS SYSTEM * SEAM LESS PIPE

- W.P≤100kg/cm2 - W.T≤3500 - W.P≥100kg/cm2

HIGH PRESS SYSTEM

JIS G 3459

SUS ( stainless ) (304, 306 TP)

CORROSION RESISTANCE HIGH TEMPERATURE SERVICE SYSTEM

- 115 -

SPECIAL REQUEST ONLY BY OWNER

HALONG SHIP BUILDING Co.

Section 4

piping system

* Hyd-line design

4.10 PIPING JOINTS KIND OF JOINTS Socket welding and threaded fitting

MATERIAL

PIPE DIA. (mm)

WORK PRESS (kg/cm )

SF45 S25C

6A~100A

Max.500

6A~50A

Max.210

15A~80A

Max.210

SUS BsTF4

Sliver brazing fitting

BsBF CNTF1

Square flange

SF45 S25C

Tween ferrule compression fitting

SUS

Max.210 6A~25A

Brass

Max.20

S25C Multi bite type fitting

SUS

Max.250 6A~25A

Brass

Max.100

S25C Flared fitting

SUS

Max.210 6A~25A

Brass

Quick coupling

MATERIAL

2

Max.20

RANGE * STEEL OR SUS PIPE *AL- BRASS * Cu –Ni PIPE * STEEL PIPE * STEEL OR SUS PIPE * COPPER TUBE *STEEL OR SUS PIPE * COPPER TUBE * STEEL OR SUS PIPE * COPPER TUBE

6A~25A

Max.210

* STEEL PIPE

25A~40A

Max.180

IF

50A

Max.140

NECESSARY

- 116 -

HALONG SHIP BUILDING Co.

SECTION 5

PAINTING PART

5.1

PRIMAY SURFACE ................................................................................... 118

5.2

preparation grade…………………………………………………119

5.3

shop priming.......................................................................................... 119

5.4

D.f.t control ( new shipbuilding ) ............................................ 120

5.5

D.f.t control ( repair ship )........................................................... 120

5.6

pre- treatment .................................................................................... 121

5.7

treatment of weld part................................................................ 122

5.8

damage part ......................................................................................... 125

5.9

Management ( pre- coating ) ....................................................... 129

5.10

environmental ( temp/ humidity ) .......................................... 129

5.11

final coat condition ..................................................................... 130

- 117 -

HALONG SHIP BUILDING Co.

section 5

painting part

* steel surface

5.1 PRIMARY SURFACE PREPARATION ITEM

Method

Surface preparation grades Sa2

6 t

Shot blasting

1 2

When shot blasting is considered

Rolled hull

impracticable, sand blasting may be

structural steel

applied. 6>t

Pipe 250 d

Sand blasting Sand blasting or hand/ power tooling

Sa2

1

Sa2

1

2

2

or St2-St3

pickling Hand/ power tooling

Outfitting, pipes, supports,

250>d

seat, etc...

pickling

St2-St3 or Sa2

1

St2-St3 or Sa2

1

2

( Blasting at yard’s convenience )

Support, seats, aux. mach. Etc.

Hand/ power tooling ( Blasting at yard’s convenience )

- 118 -

2

HALONG SHIP BUILDING Co.

section 5

painting part

* steel surface

5.2 PREPARATION GRADE IT is assumed that prior to treatment the steel surface has been cleaned of dirt and grease and that the heavier layers of rust have been removed by chipping. ( 1 ) Sa2 1/2 : Blast cleaning. Very thorough blast cleaning, Mill scale, rust and foreign matter shall be removed to the extent that only traces remaining are slight stains in the form of sports or stripes. Finally, the surface is cleaned with a vacuum cleaner, clean dry compressed air or a clean brush. It shall then correspond in appearance to the prints designated Sa 2 1/2. ( 2 ) St2 : Power tool cleaning Thorough scraping and wire-brushing, machine brushing, grinding –etc. The treatment shall remove loose mill scale, rust and foreign matter. Finally, the surface is cleaned with a vacuum cleaner, clean dry compressed air or a clean brush. It should then have a faint metallic sheen. The appearance shall correspond to the prints designated St2. ( 3 ) St3 : Power tool cleaning Very thorough scraping and wire-brushing, machine brushing, grinding-etc. Surface preparation as for st3, but much more thoroughly. After removal of dust, the surface shall have a pronounced metallic sheen and correspond to the prints designated St3. 5.3 SHOP PRIMING Item Shop primer ( Pre- treatment )

D. F. T 15   5

- 119 -

Surface preparation Shop or sand blasting Sa2 1/2

HALONG SHIP BUILDING Co.

section 5

painting part

* D. F. t Control

5.4 Dry film thickness control ( New ship building ) Item Measuring points

Tanks Outside shell

Standard One point/ five square meters One point/ ten square meters 1. Average dry film thickness of the paint to be attained as the specification. 2. At least 85% of the measuring points to meet the specified film thickness. 3. Min. 85% of the specified film thickness to be attained on remaining 15% measuring points.

5.5 Dry film thickness control ( General repair ship ) Item Measuring points

Tanks Our side shell

Standard One point/ Ten square meters One point / 50 square meters 1. Average dry film thickness of paint to be attained as the specification.

D. F. T Control

2. At least 80% of the measuring points to be met the specified film thickness. 3. Min 80% of the specified film thickness to be attained on remaining 20% measuring points.

- 120 -

section 5

HALONG SHIP BUILDING Co.

painting part

* Pre- treatment

5.6 PRE- TREATMENT FOR PAINTING Kind of paint Item MOISTURE

Epoxy resin

Inorganic zinc

Not to be visible to the naked eye

Salt Oil/ grease

“” Not to be visible. Trace of thinner wiping is permitted

Fat Soap solution Zinc salt Fume by welding or cutting Chalk/ slate pencil mark

conventional

“” White deposits are not to be visible To remove white deposits, but the remaining trace may be visible after sweep-blasting or power tooling Not to be remained. To be wiped with rags or brush. The trace be visible In general, not to be removed. In general,

Marking paint

not be removed

But if highly sophisticated special coating system to be applied,

Not to be

usage of marking paint will be

removed

advised by paint manufacturers. Remaining trace may be visible.

Dust or mud contaminants to be removed with rags, broom or Dust/ mud contamination

vacuum cleaner to the possible extent. Flying or suspension properties of fine-dust which could be excluded by self-pressure of spray – gun may be accepted in the normal shipbuilding practice.

- 121 -

section 5

HALONG SHIP BUILDING Co.

painting part

* Pre- treatment

5.7 TREATMENT AT WELDING PART Item

Remarks Stable spatter contracted surface with mother plate more than two-third of spatter width not to be removed.

1) Spatters

Stable spatters

Stable spatter ( O ) Removable or unstable spatters to be removed with grinder, disc-sander or chipping hammer. Unstable spatters

Unstable spatter ( x ) For non-exposed

Remain welding beads

areas. ( Cargo hold spaces, C. O. tanks, W. B tanks, void spaces, covered parts 2) Repair welding bead of notches

of superstructures, etc... ) Welding and grind flush

For exposed areas. ( Exposed deck, outside shells, engine room passageways etc... )

- 122 -

HALONG SHIP BUILDING Co.

section 5

painting part

Item

* Pre- treatment

Remarks Slag to be removed with grinder or disc-sander up to the standard. But if not completely removes, trace or stain may be left.

3) Slag

Rust and heat scale

4) Rust and Heat scale

- 123 -

HALONG SHIP BUILDING Co.

section 5

painting part

Item

* Pre- treatment

Remarks Weld-fume

5) Weld fume

After secondary surface preparation at each stage, the welding defects found are to be repaired as follows Grade

Area

Defects

Repair Method

Butt & Seam lines 1

of side shell

Blow hole

Welding and

Air, Water tight

pin hole

Grinding

boundaries Blow hole

6) Repair of welding defect

pin hole 2

Major structural

3 300

200

224

292

“

300

324

392

L–4

38 x 6 F.B

400

424

492

LA – 5

L–5

“

500

524

592

LA – 6

L–6

“

600

624

692

LA - 7

L–7

“

700

724

792

LA – 8

L–8

“

800

824

892

LA – 9

L–9

“

900

924

992

LA – 1m

L – 1m

“

1000

1024

1092

H < 300 = 50 x 6. F. B

H > 300 = 40 x 40 x 5 ANG.

- 138 -

HALONG SHIP BUILDING Co.

SECTION 6

ELECTRICAL PART

1.6.2 Double stair combined method

1.6.3. Reversible single stair combined method.

- 139 -

* cable stair

HALONG SHIP BUILDING Co.

SECTION 6

ELECTRICAL PART

1.6.4 Round type stair

1.6.5 Adjustment of stair height

- 140 -

* cable stair

HALONG SHIP BUILDING Co.

SECTION 6

ELECTRICAL PART

* penetration

Item 1.7 Deck and wall penetration 1.7.1 Collar and coaming Coaming dimension.

NO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

COAMTING A B 100 60 80 ″ 150 60 80 ″ 100 ″ 200 60 80 ″ 100 ″ 160 ″ 250 60 80 ″ 100 ″ 160 ″ 300 60 80 ″ 100 ″ 160 ″ 200 ″ 350 60 80 ″ 100 ″ 160 ″

n

TYPE

NO

30 40 30 40 50 30 40 50 50 30 40 50 50 30 40 50 50 50 30 40 50 50

1 1 1 1 1 1 1 1 2 1 1 1 2 1 1 1 2 2 1 1 1 2

23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

- 141 -

COAMTING A B 350 200 400 60 80 ″ 100 ″ 160 ″ 200 ″ 450 80 100 ″ 160 ″ 200 ″ 500 80 100 ″ 160 ″ 200 ″ 600 80 100 ″ 160 ″ 200 ″ 700 80 100 ″ 160 ″ 200 ″

n

TYPE

50 30 40 50 ″ ″ 40 50 ″ ″ 40 50 ″ ″ 40 50 ″ ″ 40 50 ″ ″

2 1 1 1 2 2 1 1 2 2 1 1 2 2 1 1 2 2 1 1 2 2

HALONG SHIP BUILDING Co.

SECTION 6

ELECTRICAL PART

* penetration

Item 1.7.2 Substantial for cable penetration a. Substantial for non-watertight penetration i) In case of no heat resisting steel wall, beam, girdes and long etc... to depend the substantials as shown below.

ii) In case of heat resisting. to be fitted to put about 10mm from the heat resisting surface a shown below.

- 142 -

HALONG SHIP BUILDING Co.

SECTION 6

ELECTRICAL PART

Item b. Substantial for watertight penetration i ) In case of fitting of one by one gland

ii) Assembly fitting stuffing gland.

- 143 -

* penetration

HALONG SHIP BUILDING Co.

SECTION 6

ELECTRICAL PART

Item 1.7.3. Method of entering cable into equipment a. For water tight gland

b. For coaming

- 144 -

* method of entering cable

HALONG SHIP BUILDING Co.

SECTION 6

ELECTRICAL PART

Item 1.7.4 Detail of cable through deck & wall a. A and B class steel Wall i) Rectangular collar type

ii) Round collar type

Cable

- 145 -

*wall collar

HALONG SHIP BUILDING Co.

SECTION 6

ELECTRICAL PART

Item b. A class deck i ) Rectangular coaming type

ii ) Round coaming type

- 146 -

* coamings

HALONG SHIP BUILDING Co.

SECTION 6

ELECTRICAL PART

Item c. Multi cable transit For A class deck in electric cable trunk shall be supplied.

- 147 -

* M. c. t

SECTION 6

HALONG SHIP BUILDING Co.

ELECTRICAL PART

* fittings installation

6.2 WEATHER DECK FITTINGS 2.1 Distance between steam pipe to cable

2.2 Cable grand install

2.3 Cable pipe thickness range for on deck and W.T or F.O tank penetration parts. PIPE INTERNAL DIAMETER ( I. D )

MINIMUM THICKNESS

ID < 57.0

4.0

57.0

4.5

ID