Painting Specifiaction For Ship (Container)
2.1 PAINTING
2.1.0 GENERAL
Descaling, shop priming, derusting and painting works to be carried out as outlined below and in accordance with the maker's recommendation and the current Builder's practice.
Colours of finish for hull to be in accordance with the Owner's colour scheme.
The steel structure surfaces including all welded beads to be painted before leak test, in general. However, fillet welding joint and erection seams/butts forming tank boundary to be painted after the joint has been examined either by compressed air test, vacuum test or tank air test as appropriate.
Pre-erection joint of hull block to be painted before leak test and not to be considered as block erection joint.
The adhesive tape may be used to protect the fillet joint and erection seams/butts waiting for leak test from contamination by surrounding painting. The surface of materials other than steel and permanently enclosed space not to be painted. Machinery, electrical equipment, fittings, valves, deck machinery, navigation equipment, furniture, etc., to be painted in accordance with the maker's standards unless otherwise specified.
The paint not to be applied during the periods of rain, snow, fog or mist in the open air and also not to be applied when the weather conditions may cause condensation i.e., when the relative humidity is above 90% and the steel temperature is lower than 2 degrees in centigrade above dew point except the case that paint maker has confirmed that a particular paint can be applied at such weather conditions.
In case of the application of the tar epoxy or epoxy paint during the winter season, the Builder may use the winter type paint recommended by the paint maker.
2.1.1 TREATMENT OF STEEL SURFACE
2.1.1.1 PRIMARY SURFACE PREPARATION
The hull structural steel of 6.0 mm thickness and above to be shot-blasted to SIS S.A. 2 1/2 and immediately coated with one(1) coat of 15 microns inorganic zinc silicate type shop primer.
Grit or sand-blasting to SIS S.A. 2 1/2 may be applied instead of the shot- blasting for the hull structural steel when the shot-blasting is considered impracticable.
The hull structural steel below 6.0 mm thickness, if any, to be grit or sand- blasted to SIS S.A. 2 1/2.
2.1.1.2 SECONDARY SURFACE PREPARATION
Before the first coat is applied, damaged area of shop primer due to welding, burning, rubbing, etc., and the rusted steel surface to be blasted and to be power tooling with the grade of the following table after erection on board. But, deck house block to be power tool cleaned at all stage.
Area
SIS Grade
bottom
SIS ST3
topside
SIS ST3
Weather deck
SIS ST3
Deck house exterior
SIS ST3
Deckhouse interior
SIS ST2
E/R interior
SIS ST2
Water ballast tanks
SIS ST3
Cargo Hold W&OH
SIS ST3
Cargo Hold Tank Top (at block stage)
SIS Sa 2.5
(after erection)
SIS ST3
Tanks other than F.O., D.O.tanks
SIS ST3
F.O., D.O. tanks
Builder's practice
Others
SIS ST2
The visible zinc salts on intact shopprimed surface to be treated in accordance with the Builder's practice.
2.1.1.3 SURFACE CLEANING BEFORE OVERCOATING
The surfaces to be cleaned of oil, moisture, dust, and other foreign materials with thinner, fresh water, wire brush, or compressed air prior to coating.
2.1.2 APPLICATION OF PAINTING
Paint application according Maker's recommendation.
Steel outfittings to be painted with the same system as surrounding.
The painting to be carried out by airless spray, in general. Where the spraying is impracticable, such as applying paint to non-skid areas, the brush or the roller to be used.
Mixing and thinning of the paint material and interval of painting to be in accordance with the maker's recommendation.
The painting schedule specified here under may have alteration in number of coats and the dry film thickness in accordance with standard specification of the paint maker selected. And the standard specification to be submitted to the owner for approval
In the edges of small holes such as slots, scallops, drain holes, air holes, etc. and corners of flame burnt free edge of structural members, the dry film thickness may not always be the specified, but have two(2) stripe coats for ballast tanks and one(1) stripe coat for other area.
The painting of the exposed structural steel surface such as outsides of shell, deckhouse, funnel, etc., and of living space and passages in living quarters to be free from sags and runs.
After the specified coating is applied, the damaged parts of paint film to be repaired at proper time. When such a damage reaches to the steel surface and rust occurs, the surface to be cleaned by the wire brush and/or disc sander and to be coated as originally specified.
When such a damage does not reach to the steel surface, the surface to be touched up to the specified film thickness.
Dry film thickness to be measured after completion of anti-corrosive coating or final coating in accordance with the Builder's practice.
No measurement of dry film thickness to be made for machinery, equipment, outfitting, pipes with nominal diameter of 250 mm and below, pipe supports, machinery seats, small fittings, etc.
Small outfitting and fittings may by galvanized instead of painting as per the Builder's own discretion.
Galvanized Items in W.B.tank and Exposed deck.
On exposed deck
- Handrail of inclined ladder.
- Handrail and stanchion with stay of ship side, deckhouse & engine casing.
- Storm rail.
- Loose parts of accessory such as hook & shackle for radar mast, antenna mast, jack & ensign staff.
- Keep chain.
- Wire rope.
- Fire fighting line, deck wash line, compressed air line, sounding line & air vent pipe on exposed deck.
- Cable tray & cable box on exposed deck.
In water ballast tank
- Vertical ladder.
