SC4421G-010-02SM 2H 4-9-09船体与油漆

PART II HULL CONSTRUCTION AND PAINTING CORROSION (1)SECTION 1HULL CONSTRUCTION PART (1)1-1 GENERAL (1)1-2 MAIN HULL (3)1-3 MAIN HULL MISCELLANEOUS (9)1-4 SUPERSTRUCTURE AND DECK HOUSES, CRANE HOUSES (12)1-5 FUNNEL (13)1-6 BOTTOM PLUGS (13)SECTION 2PAINTING CORROSION (14)2-1 GENERAL (14)2-2 SURFACE PREPARATION (16)2-3 APPLICATION OF PAINTING (17)2-4 FILM THICKNESS (18)2-5 INSPECTION (19)2-6 PAINTING SCHEDULE (19)2-7 Painting schedule of wooden surface (22)2-8 Cathodic protection (22)2-9 MGPS (22)2-10 Galvanizing (22)PART II HULL CONSTRUCTION AND PAINTING CORROSIONSECTION 1 HULL CONSTRUCTION PART1-1 GENERAL1-1.1 Material and scantlingSteels for hull construction to be of normal quality mild steel and high strength steel (yield stress 314 N/mm2 ) approved by the Classification Society, and steel including casting and forging to be of qualities as complying with the requirement and test of the Classification Society.High strength steel (yield stress 314 N/mm2) used in the hull construction to be abt.40% of total hull steel weight.Steel material not specified by the Classification Society to be in compliance with Chinese Industrial Standard and in accordance to the Builder's practice.Application of steel grade to be in accordance with the requirement of the Classification Society.Scantling to be based on ship’s scantling draft (mld.) of 10.40 m and according to the Class Rules.Structural detail to be in accordance with the Builder's practice and Class requirements.Scantling of cargo hold structure members to be compliance with IACS unified requirements for new building double skin bulk carriers.Scantlings, not specified by the Classification Society, to be in compliance with Builder's practice.If extra thickness or over scantling which are above Rule requirement except specially mentioned in the Specification are required by the Owner, they shall be accepted by the Builder subject to price and deadweight adjustment, so far as the works do not disturb the Builder's working schedule.Different colours shall be used for priming mild steel and high tensile steel.1.1.2 W orkmanshipWorks to be executed in accordance with the Builder’s construction practice and under the survey of the Classification Society and the Owner supervisor.Chinese Shipbuilding Quality Standard and Buil der’s and Maker’s Quality Standard to be applied for workmanship of hull construction and outfitting. CSQS to be submitted to Owner for reference.Temporary access openings may be provided on shells, bulkheads, decks, walls, etc.for convenience of works and to be closed in place by welding and inspected. ButH-1temporary access openings to be provided as few as possible and not permitted on sheer strake, stringer strake, keel plate and bilge strake, as far as possible.Temporary access openings after welding to be checked by X ray /UT if necessary.1.1.3 WeldingThe hull is to be of all welded construction.Welding to be executed in accordance with the Builder's practice and under the approval of the Classification Society except unimportant or attachment weld which to be carried out as per Builder's practice. Welding procedures and welders to be approved by Class.Manual, semi-automatic and automatic welding methods including one side welding shall be applied as per Builder's practice.All welding for the main hull and superstructure exposed to weather or wet space to be of double continuous fillet welding for stiffening webs, stiffeners, frames. Intermittent welding to be used for internal structure of superstructure for ordinary beams, frames and stiffeners in dry space.Clamps, dogs and other suitable devices to the Builder's practice to be applied for execution of welding so as to place the material into adequate position.Dogs, eye plates and clamps etc. used for the erection to be cut and grind smooth.Any under cut found in way to be built up with welding.The temporary filling used for erection to be neatly removed, damages to the base material to be repaired by welding and grinding.In order to ascertain the soundness of welding, suitable number of X-ray photograph to be taken for the important members according to the Rule requirement.All such X-ray photographs to be presented according to CSQS and checked by the Classification surveyor.X-ray photographs to be also checked by Owner.1-1.4 Slot, scallops and holeSlots, scallops, air holes and drain holes to be provided where necessary in accordance with Builder's practice as shown on approved plans.In ballast and oil tanks, particular care to be given to provide good drainage in order to get good efficient pump operation. Suitable drain holes and air holes to be provided on transverse structural members. The scallops in bottom area to be not less than 100mm radius.Lightening holes at platform (in horizontal position) in peak tanks to be grating type.H-21.1.5 S tructure and Tightness Test:Structural and tightness tests to be carried out in accordance with the Builder's practice which is line with the requirement of Classification Society and in the presence of Owner's supervisor.1-2 MAIN HULL1-2.1 GeneralThe scantling, construction and materials of hull within a range of midship part to be as shown on the Midship Section.The vessel to be of all welded steel construction.The structural work shall executed in accordance with the Builder's standard practice and Class requirements.All connections of frames, beams, bulkhead stiffeners, etc. to brackets to be carefully managed to keep continuous welding around ends of brackets.Reinforcement for docking to be carried out to Classification requirement.Opening in the shell plating, deck plating etc. to be rounded and reinforced where necessary.Decks under machinery, bollards, boat davit and other heavy concentrated loads to be reinforced by stiffeners or welded doubler where necessary as approved by Class.In general doublers not to be used in shell and in deck plating, except in way of pillars.Insert plates of increased thickness to be used for reinforcement.Bulb plate and flat bar to be applied in way of all water ballast tanks instead of angle bar or built-up section . Angles or built up sections may be applied with Owner’s approval.Sharp edges of plates in way of lightening holes, scallops, drain holes and free edges of flat bar stiffeners and collars are to be ground smooth.1-2.2 Plate keelThe plate keel to be connected firmly with stem and stern frame.1-2.3 Stem, stern frame and rudder hornStem together with bulbous bow to be of fabricated welded steel construction throughout with well rounded forward edge, carefully formed to obtain fair connections to the hull lines, and welded to the shell and keel plate.H-3Stern form to be of mariner type having an adequate propeller aperture. Stern frame to be of fabricated steel plate welded construction with the propeller boss of cast steel and the rudder horn fabricated with cast steel and steel plate. Stern frame to be welded to shell and keel. Rudder horn shell structure to protrude through aft peak structure to aft peak platform.Low hydrogen electrode to be used for welding thick steel plate to casting and high tensile plates.Stern tube to be of fabricated steel plate welded construction and welded firmly between shaft boss and bulkhead of aft peak.1-2.4 Shell platingAll plates for shell and decks throughout to be arranged longitudinally.Thickness of shell plate to be approved by Class. Extra thickness of shell plating around anchor rubbing area and bulbous bow below bell mouth to be 3 mm above requirement.Stringer plates and sheer strake to be connected welded "T" type corner fillet as shown on the Midship Section. Welding quality and inspection to be in accordance with the requirements of the Rules.Transverse framing system to be adopted for side frames in cargo hold.Anchors to be stowed with no “frog eyes” as far as possible. If not possible, anchors to be stowed against a “frog eye” construction to ensure that anchor drops clear of bulbous bow.Simi-round bar to be welded on transom edge adjacent to shell plate. Chafing bars to provided on outer shell IWO mooring ropesExtra thickness and stiffeners undersides to be provided by inserted thicker plates in way of hawse pipe, around sea chest openings and deck on hatch coaming corners.Openings in shell plating to be well rounded and reinforced by inserted thicker plates according to the Class Rules. Doubling plates or substructures to be provided under supports, columns, legs etc.Tug push marks to be marked on the shell plating, the structure in thrusting position to be strengthened and stiffened. 6 Tug push spots to be provided at bulkhead 3/4 P&S when 1 tug; 1/2 and 4/5 P&S when 2 tugs.The lifting rings to be provided for propeller and rudder installation.1-2.5 Bottom constructionCellular double bottom to be constructed under cargo holds and engine room.The hull bottom constructions to be provided longitudinal framing system for cargo space, and transverse or longitudinal framing system for engine room space and foreH-4and aft peak tanks. Attention to be paid to the members for the transition region of the longitudinal and transverse framing.Substantial scarping arrangements to be fitted at transition from longitudinal to transverse system and at engine room/fore peak bulkhead.The uniform load for tank top to be 25 t/m2 in Hold No. 1/3/5 and 22 t/m2 in Hold No. 2/4.It being understood the light weight to be added accordingly.Tank top to have sufficient strength for forklift truck operation.typesThe inner bottom in the cargo holds to be horizontal with hopper-shaped sides having inclination of about 450 to the horizontal.The thickness of inner bottom plating in cargo holds to be increased according to the requirement of the Class Rules for grab discharge. The maximum unladed grab weight to be about 20 tons.Inner bottom and bottom structured to be reinforced for the carriage of two tiers of 25 tons steel coils in 1.2m long with 6 donnages. Suitable eyes for lashing will be positioned on longitudinal or transverse bulkheads in cargo holds.The bottom forward to be strengthened against slamming and designed in accordance with the requirement of the Classification Society,for the draft corresponding to the normal ballast condition.H-5Pipe duct to be provided for the double bottom in No.2 to No.5 cargo holds and for C/H No.1 to be decided by detailed design. Pipe duct to have access in E/RPipe duct to have access also at forward end and engine room. The access in engine room to be fitted above engine room granting floor and to be watertight closed by manhole cover. Bottom structure in way of duct keel to be adequate for docking with centerline keel blocks.In double bottoms, solid floors to be fitted for every three (3) frame spaces, and watertight floors to be fitted at watertight bulkheads, bottom and inner bottom longitudinal as well as side girders to be fitted.Solid floors to be fitted at every frame in engine room. In double bottom side girders to be arranged in suitable positions to suit the seating of the main engine.Manholes for double bottom tanks and other tanks to be fitted at suitable positions. Two (2) manholes for each ballast tank and fuel oil tank IWO cargo holds to be provided.Two (2) bilge wells to be provided in the aft part of every cargo hold and so designed as to prevent choking of suction pipe when grain loading. Bilge well plate to be 5mm thicker over Rule requirement. Bilge well to be divided into two parts, one as settling and one as suction.Bilge well covers to be flush with tanks top.Wells for sounder transmitter and log in double bottom to be provided.Suitable drain holes to be arranged in double bottom tanks so as to be able to discharge/drain easily.Adequate number of eyes to be welded in water ballast tanks for fitting anodes later. Lashing eyes in cargo hold and on deck to be galvanizedBottom portion of hold ladders to be adequately protected against damage on either side on lower stool.Manholes in cargo holds to be flush type. All studs/ nuts to be SUS with cap nuts. Manhole covers in cargo holds to have cover protection plates with fixing bolts. Perforated galvanised steel cover plates are to be provided for the bilge wells.Half round bars having the size of 60 mm x 30 mm are to be fitted at the shell edge in way of mooring rope rubbing area.Stem bar is not to be used.H-61-2.6 Side Structure (including hopper tank)Web frames to be fitted in double skin, spaced in general not more than six frame spaces apart, and to be firmly connected to the structure of topside tank and hopper tank.The structure in hopper tank to be longitudinal framing system with non-watertight transverses, spaced every three (3) frame spaces apart.Web frames to be fitted in engine room, spaced in general not more than six (6) frame spaces apart.Frame spacing to be shown as the General Arrangement Plan and for longitudinal spacing as Midship Section.Tank 5 P&S double hull to adopt as temporary slop tank (S) and fresh water tank for C/H cleaning (P). Double hull connected with double bottom iwo C/H No.1-4 to be ballast tanks.1-2.7 Top side tankThe topside tank to be arranged at shoulder part of cargo holds and to be used asH.F.O tanks with cofferdam or water ballast tanks. Watertight duct for cables, pipes,under main deck IWO top side tanks (cofferdam) to be provided on both sides.The top side tanks to have a slope of about 30o to the horizontal.The structure in topside tanks to be longitudinal framing system with non-watertight transverses, and longitudinal framing to be continuous through watertight partitions.1-2.8 DecksThe design load for upper deck to be in compliance with the requirement of Rule.Upper deck to be strength deck, longitudinal framing system outside line of openings and transverse framing inside line of openings. Upper deck to be fitted with girders, longitudinal stiffeners, and transverses spaced not more than six (6) frame spaces apart, others parts of upper deck to be transverse framing system.Web beams to be fitted in line with web frames.A thicker insert plate to be used at the hatch corner and the form of the hatch corner tobe elliptical in accordance with the Class Rules. Flush up type of main hole covers on main deck to be provided.Structure to be suitably strengthened under cranes, etc.Girders, short beam and/or post to be provided under deck having concentrate loading, such as deck machinery, bitt, bollards and boat davits etc. Girders under grabs when stowing to be provided. Girders under spare anchor to be provided.H-7Deck plating under all machinery such as cranes, windlass, mooring winches and boat davits to have increased plating thickness.Platform deck to be provided in engine room, and suited to main engine as far as possible. Platform for the generators to be reinforced necessarily.Upper deck manholes to be preferably 800 x 600 mm and covers to be fitted with SUS studs and cap nuts.Strengthening in way of hatch cover lifting cylinder gear to be preferably of box type structure so as to enhance cleaning.Hatch corner plating should have no pipe/cable penetrations.1-2.9 PillarsH-type Pillars to be provided under both side girders of engine room opening to prevent vibration.Structure in way of engine side supports to be adequately strengthened.Supports for main engine shall suit to the both sides construction of the engine room opening.Adequate number of pillars to be provided under the superstructure decks or deck house walls under concentrated loading.No pillar to be arranged in the cargo holds.Engine room deck in way of M.E. side bracing to be strengthened by deep web frames/girders.1-2.10 BulkheadWatertight transverse bulkhead to be extended to the upper deck as shown on the General Arrangement Plan.The forward collision bulkhead and the forward and aft bulkhead of engine room to be of plain type with vertical stiffeners supported by horizontal girders where necessary.The stiffeners of the bulkheads at fore peak tank, engine room, aft peak tank to be arrange inside the compartment.The bulkhead between No.5 cargo hold and engine room to be A60 class.Transverse bulkheads between cargo holds to be vertically corrugated bulkheads.Bulkhead to be fitted with upper and lower stools.Corrugated bulkheads to be mounted on lower stools and slant cover plates to be fitted at the lower ends of the corrugations to avoid accumulation of bulk cargo.H-8Transverse bulkheads in No.3 cargo hold which are designed for dual purpose as cargo hold and fully loaded ballast tank to be constructed of vertical corrugation with upper and lower end stool.Other bulkhead in the main hull may be of flat plating type with vertical stiffeners and suitable numbers of horizontal girders or vertical webs.Boundary steel walls to be built for the carpenter's work room, stores, control rooms and other necessary space.Sloping upper stool plating for grain trimming to be specially considered for the bigger holds. Upper stool to be rectangular.For Hold 3, remotely controlled overboard discharge valves with manually operated valves for safety are to be provided on P & S side for filling / discharge by gravity, and the aft bulkhead lower stool to be used for this purpose. This cargo hold to be suited also for filling-in / pumping-out water ballast by ballast pump, when connected to the ballast piping system in duct keel.Eye plates (galvanized) for lashing are to be provided on longitudinal and transverse bulkheads in cargo hold.1-2.11 Peak tanksFore and aft peak tanks to be reinforced with side transverses, side stringers or non-watertight opening platform and to be used for water ballast tanks. Aft peak tank to be able to suctioning by fire main.Lightening holes at platform (in horizontal position) in peak tanks to be grating-type.Fore peak and fore area to be reinforced for panting and slamming.Aft peak tank alternative filling by fresh water to be provided. It being understood that loading fresh water in Aft. peak tank not to be included in the loading manual.1-3 MAIN HULL MISCELLANEOUS1-3.1 FoundationGirders under main engine to be extended as for forward and aft as possible.Foundation for the main engine to be welded structures as a part of the double bottom construction of the engine room. The scantlings of foundation to be in accordance with the recommendation of main engine maker. Foundation for generators and the boiler to have adequate strength and rigidity.Foundation for generator engines to be as per maker recommendation.H-9Deck machinery and equipment as well as auxiliary machinery in engine room to be generally provided with foundation of steel welded construction with suitable re-inforcement under if required.1-3.2 Hatch coamingThe coamings for cargo hatches to be fitted with horizontal stiffened surface plating and half round wear bar 60x30mm on the top and T type stay and horizontal stiffeners to increase coaming stability on plate of T type stay attached a horizontal flat bar at midheight. Hatch coamings to have 60 x 30 mm diameter half round steel anti-chafing bars installed all round on upper and lower side of hatch coaming.Foot steps to be provided at suitable position on hatch corners. 4 STANDING PLATFORMS for hatch operator on each hold: for/aft,1-3.3 Chain LockerTwo (2) self-stowing chain lockers to be arranged in the fore peak tank and Bosun store, and to have ample capacity and height for stowage of chain cables.600 x 800 mm watertight steel cover to be provided on each chain locker wall. No lining in this wall of chain lockers. Access to space under grating to be provided to remove mud & etc. Minimum height between lower edge of chain pipe bell mouth and loosely stowed chain to be not less than 1500 mm.A suitable designed steel grating of partly removable type to be provided about 0.8mfrom the bottom of the chain locker adequately supported to take the weight of the chain cables.The end of the chain cables to be secured on upper level in chain locker so that managing the cable releaser by hands on the upper deck to release chains easily.Cable release to be quick release type.Perforated plates 600mm above bottom to be fitted.Bottom plating thickness 4mm above Class Requirements.Bottom removable sections grating of chain locker to be 30 mm. thick.Bilge in chain lockers to be discharged by eductor and chain washing down water to be supplied from fire and deck wash system.In E/R to have one bilge well aft of ME.1-3.4 Bilge KeelBilge keels to be arranged on the both sides of the vessel with 400mm depth, and to be built up with flat bar and bulb plate. Bilge keel will be fitted amidship extending for abt. 30 % of the length between perpendiculars.H-10Bilge keel to be fitted by welding on flat bar which welded on shell plate. Bilge keels not to be intermittent at erection block joints.Bilge keel ends to be fairly tapered without special reinforcement and ended at frames of the hull.Bilge keels to be preferably of discontinuous type staggered at erection joints . Ends to be reinforced by shaped flat bar. Crack arresting holes to be drilled on butt joints and scallops to be avoided.The installation position of bilge keel to be in accordance with the tank test result for streamline testThe butt seams on the bilge keel flat bars and shell plates to be staggered each other as per the Rule.Transverse welds intersecting shell plating to be scalloped.1-3.5 Sea ChestOne (1) high sea chest and one (1) low sea chest to be provided. The clear area of sea chest opening to be at least 2.5 times of main pipe suction.Separate sea chest to be provided for emergency fire pump.Ice sea chest to be provided near centre line as required by rules.The sea chests to be built welded by steel plate, and provided with vent-pipes, steam pipes or compressed air pipes in it. The drain holes and the air holes to be arranged in the shell plates in lower and upper parts of the high sea chests. Chest openings to be shaped so as to avoid stress concentration of shell plating and fitted with thicker insert plates.The hinged strainer plate welded by the galvanized steel plates to be provided for each sea chest with stainless steel bolts and nuts.Cathodic protection to be provided for the sea chest.1-3.6 BulwarkSteel plate bulwarks to be fitted on forecastle deck, fore and side of bridge wings, with top rail of plate for reinforcing and stays for adequate frame spaces, and checkered steel step plates for forecastle bulwark forward so as to watch releasing and hoisting anchor.Bulwark is to be provided with half round bar in way of oil hose handling area.The Bridge wings to have all round steel bulwark.Bulwark to be of 1100 mm in height.H-11Opening for fairleader on bulwark to be well-rounded and reinforced with half-round bar.Top hand rail to be fitted on the front bulwark of the navigation deck.Wind deflector, height 1400 mm, at house side and 1300 mm at out side of steel venturi type to be provided on the front bulwark of the bridge wings.F.R.P. top rail to be fitted at front bulwark of bridge winds.Foundation for Suez Canal projector to provide1-4 SUPERSTRUCTURE AND DECK HOUSES, CRANE HOUSESThe vessel to have (5) tiers of deckhouse. The front wall of wheelhouse to be inclined forward.The structure of superstructure and deck house to be transverse framing system.Outside wall of superstructure and deck house to be of flat type with vertical stiffeners and welded on deck plates. Walls of superstructure and deck house to be watertight or non-watertight according to their respective characters.The bridge wings to be extended to the exterior breadth of the vessel.Stiffening of house to be specially considered and care to be taken to obtain a well designed superstructure to reduce vibrations. Plate thickness to be in accordance with the Rules.Strength bulkheads to be carried through at all deck levels for strength against vibration.Compass deck in way of magnetic compass to be of stainless steel.Effective drainage from all decks and top of the wheelhouse to be arranged. Drainage pipes to be as straight as possible.For crane house, combination framing system to be built and formed a entirety with the crane post as shown on General Arrangement Plan. Crane post to protrude through upper deck and be anchored to upper stool lower plate.Minimum thickness of exposed deck to be 8mm and superstructure forward bulkhead to be 7mm and other exposed bulkheads to be 6 mm. except A deck which is 8 mm.mm . Internal boundary bulkheads to be 6 mm.H-121-5 FUNNELThe rectangular funnel to be welded construction with vertical stiffeners and horizontalstringers, and with closed top plate, , and a steel door on it. No eye plates for stage ontop and rail only.Louver to be provided on back of funnel for engine room ventilation.Funnel structure to be strengthened at supports for exhaust pipes etc. Eyes or rail forpainting stage to be provided outside.Funnel top to have drain on P & S.funnel height to be increased by abt.1.5mDrainage on aft side to be provided.Company’s emble m to be of steel plate fully welded construction.1-6 BOTTOM PLUGSBottom plugs to be hexagonal for oil tanks and square for water tanks.Material: Boss: Mild steelPlug: Stainless steelLocation: All ballast, fuel, fresh water tanks and cofferdams, etc. in the bottom shell, sludge tanks, etc.Different key for water and oil tank to be provided.Scantling: 42mm.Suitable number of spare bottom plugs to be supplied as follows:Varied oil tanks: Two (2) piecesBallast tanks: Five (5) piecesH-13SECTION 2 PAINTING CORROSION2-1 GENERALThe painting works including surface preparation to be executed in accordance with Builder’s practice and approved by the Owner. Recoating interval to be as per paint technical data sheet. All requirements for PSPC compliance to be followed. Coating manual to be prepared as per Paint Manufacturers recommendations for Owner’s reference. The surface preparation grades to be as per Swedish standards SIS.Surface preparation and painting to be inspected by yard Q.C., paint maker’s inspector at all stages including shop priming. Owner’s representative to be advised of all inspection and shall attend inspection as requested.Painting scheme to be submitted to Owner for approval, colors of finish paint to be as per Owner’s color scheme. Each coat of anti-corrosive paint to be different color for easy identification.Copper, copper alloy, aluminum, alloy and stainless steel not to be painted in general unless otherwise specified.Enclosed spaces in hull to be painted as void spaces before closing .Enclosed void spaces of steel outfittings such as bollards, mast, crane posts ,inside hatch cover etc.( to be shop primed). However the deck in way to be painted.During fabrication of hull structure, steel surfaces are to be treated as follows: Free edges and plate burrs, both caused by gas cutting or plasma cutting, are to be ground by grinders or disc sanders in accordance with the Bui lder’s standard.Free edges of rolled plates and sections and upper side of plasma cutting free edges are to be left as they are. Free edges of rolled plates and sections are to be ground smooth if damaged during handling or any other process.All spatters on welds to be removed by grinder. Hard arc strikes on the surface not to be coated with paint are to be left as they are. Loose spatters on the surface to be coated with paint are to be removed, prior to the application of paint coating, with chipping hammer or scraper.Excessive undercuts are to be welded up & ground smooth and treated in accordance with the Builder’s standard.Welding beads having excessive surface irregularity are to be ground smooth and treated in accordance with the Builder’s sta ndard approved by the Owner.Galvanized surfaces, which are specified to be coated with paint are to be applied with etching primer or equivalent before paint coating.All blocks are to be basically outfitted prior to block painting to avoid paint damages.Painting works shall not be performed in the open air during the periods of rain, snow, fog or mist and also shall not be carried out when the weather conditions may causeH-14。