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1、BUILDING POLICY (PRELIMINARY)FORMT6015 MULTIPURPOSE FIELD SUPPLY VESSEL & PIPE CARRIERCOSCO GUANGDONG SHIPYARD CO.,LTD.DESIGN： CHECK： REVIEW： VERIFY： APPROVE： JULY, 2010 CONTENTS1 Treaty contents11.1 Owner11.2 General description11.3 Class and flag11.4 Contract award date, effective date and deliver
2、y date11.5 Others12 Main particulars and materials22.1 Dimensions22.2 Construction22.3 Main equipment and special equipment22.4 Main material29 Temporary Working Hole and Safety Access (Ref. Temporary Working hole Plan)39.1 Rout Introdution310 POLICY OF QC DEPARTMENT410.1 Quality control policy410.2
3、 Stage of cutting and process410.3 stage of component & subassembly group410.4 Stage of block subassembly410.5 Stage of block subassembly410.6 Stage of block assembly510.7 key point of quality control for outfit510.8 Electrical system installation quality control510.9 Quality assurance measure611 Th
4、e responsibilities of Material administration Department712 The principle of design department812.1 Objective of design812.2 Design Division812.3 Order phase approach812.4 Standardization912.5 Guidelines of detailed design912.6 The principles of production design912.7 Design focus control1113 Constr
5、uction management department Operating Policies1313.1 Construction target1313.2 Contral target1413.3 Construction management steps151 Treaty contents1.1 Owner1.2 General descriptionThe vessel has two main engines, 2 of Controllable pitch propellers, 4 of side thrusters. The vessel arranged as Machin
6、ery with accommodation arranged forward. The vessel built for World Wide service. Materials and equipment to be of recognized manufactors and shall satisfy the requirement of class rules accordingly.The vessel is to fullfil the general demands of the offshore industry as transport pipes, cement, equ
7、ipment and cargo to and from pipe-laying barges, drilling platforms and production platforms.Main deck to be arranged for deck cargo with an area of approx. 51 m x 13,5 m and for a load of 5t/m2.The vessel arranged with accommodation for 20 officers and crews and passengers.1.3 Class and flag Class:
8、 Det Norske Veritas (DNV)1.4 Contract award date, effective date and delivery dateEffective date Delivery date 1.5 Others If descriptions/ parameters of the equipments in the specification different from the order of equipment and technical agreement approved by owners, shipyards and designers, subj
9、ect to technical agreement.Owner furnished equipment： 2 Main particulars and materials2.1 DimensionsLength o.a.73.60 mMax draught5.83 mSailing areaWorle wideTrial speed at d=4.0 m15.0knLength b.p.p.68.30 mDeadweight d=5.83 m3150 tBreadth mld16.00 mGross Tonnage2100Depth main deck7.00 mDeck cargo cen
10、ter of gr.ty 1 m above deck1600tCargo deck, free area680m22.2 Construction2.2.1 Camber: All decks to have no sheer and camber. 600mm 625mm 600mmaft. fwd. #34 #582.2.2 Frame spacing:2.2.3 Double bottom arranged from fr. 14 - 84 and in fore thruster room.2.2.4 The vessel hull is welding combined syste
11、m in the structure, with transverse stiffent. Port side and the bottom is transverse framing. A strong box construction skeg is to be arranged at the centreline aft.The vessel has two of flap rudder.2.3 Main equipment and special equipmentMain diesel engines2sets model :C25:33L8PCD Engine output: 25
12、60 kW Engine speed.: 900rpmAux. generator2sets Generator output: (310 kVA) Voltage: 440V Frequency: 60Hz speed.: 1800rpm Enclosure: IP23Main Gear2sets Type : 600 AGHC V- KP50L Shaft generators2sets Capacity each : 1800 kVA Voltage : 440 V Frequency : 60 Hz Temperature class : F Enclosure : IP55emerg
13、ency/harbour generator1set Generator output: 150 kVA Voltage: 440V Frequency: 60HzTemperature class: F Enclosure: IP23Gearboxes for Fi-Fi pump and Fi-Fi pump2sets Capacity : approx. 1650 m3/hr. Power cons. : approx. 850 kW Pump speed : approx. 1800 r.p.m.Controllable pitch propeller2sets Make : Roll
14、s-Royce propulsion systemType : 72A/4-B-2900Number of blades : 4 each propeller, speed (MCR) : Approx 197 rpmShaft generator for Azimuth thruster Engine1set Output approx: 250 kW -310 kVA, 440 V, 60 Hz at max. rpm. Generator to be driven Aux. gen for Azimuth thruster2sets Performance: Approx. 900 kW
15、/1800 rpmDry cement tanks5sets Capacity: 2250 cb.feetForward Side thrusters2sets Type: TT1850, 590 kWAft Side thrusters2sets Type: TT1650, 590 kWSteering Gear2sets Rolls Royce independant electric-hydraulic steering gears2.4 Main materialHull steels weight: 1380 t 9 Temporary Working Hole and Safety
16、 Access (Ref. Temporary Working hole Plan)9.1 Rout IntrodutionA Access for E/R Engine room outboard staging Temporary working hole on side shell of E/R Upper platformPassageway inside of E/R Ladder gangway Upper deck Access on the upper deck Passageway inside of E/RB Access for the stern Outboard St
17、aging Temporary working hole on the sternC Access for Midship area The inclining ladder on the building berth Temporary working hole on the upper deck Staging along the bulkhead Inner bottom Outboard ladder gangway Upper deck ladder on the bulkheadD Access for the bowEngine room outboard staging Tem
18、porary working hole on side shell of E/R Upper platform Temporary working hole on the bowE Access for the superstructure Ladder gangway Upper deck Superstructure passageway10 POLICY OF QC DEPARTMENT10.1 Quality control policy1、 Intensify quality control by self-help2、 Do the process of quality contr
19、ol well3、 Intensify the supervise of technics discipline4、 Strict with the key point of quality of working procedure10.2 Stage of cutting and process Remove the burr and scraps of the free edge Precision of curve hull plating Precision of cutting plate & profile Tracing the main structure members10.
20、3 stage of component & subassembly group All of the plate of bulkhead & all of profiles to be flat by hot working Thin plate of shell & profile which being distortion to be rectify Quality control for inside of automatic submerged-arc welding seam Precision of opening for doors and windows in way of
21、 superstructure Precision of process/flat for bulkhead plating in way of superstructure10.4 Stage of block subassembly Before leaving jig, block joint seam to be flat and fairing. Shringkage and precision of cutting to be checked Precision of marking to be checked Principal dimension control and cor
22、rectness to be checked Shell plating of block concave to be checked after rectify. Angle between broadside and deck to be controlled. Anchor system: marking & installation Roughness of doors and windows opening in way of superstructure. Free edge distortion to be rectified and block to be reinforcem
23、ent. Knock-down plate to be weld temporary. Groove direction of erection joint seam after exceed been cut, out look groove quality. Process of shaft strut & casing welding to be supervised & noted. Welding process control for important blocks. Rudder at the after and foundation of main engine prefab
24、ricated and installation precision.10.5 Stage of block subassembly Height and half width control for both forward and after parts of the vessel Control the height of superstructure/ shape roughness/alignment between corrugated bulkhead which on the platform and lower the platform. Consider the pipe
25、to be press-test independence and to be vacuumed. Size and Roughness control of doors and windows opening in way of superstructure.10.6 Stage of block assembly Key block position fix on/center line/block height/level degree/width control Precision of shaft strut weld to hull structure. Block joint s
26、eam welding quality control. Block assembly cutting quality & fitting precision control, require to make sure CO2 single groove to be consistent with groove required by welding process. Axis precision control Principal dimension control of the whole vessel. Sequence of block butt-seam rectify contro
27、l.10.7 key point of quality control for outfit Tail shaft surface defect examination (before storage) Tail shaft out diameter/length/pulsation examination Tail shaft concentricity and fitting tightness examination Bearing out look examination & size measurement Forward and aft bearing and sternpost
28、defect examination Main engine/tail shaft etc. main equipment examination when arrived, and maintain control Vessel mooring control after launch Debugging quality control Tank capacity condition control Main engine bearing corrosion situation examination Rudder casing defect examination Rudder stock
29、/pintle/ bush for lower bearing precision process examination Shaft and shaft seal quality(burr clear up) Quality of all classes of valves(tightness examination, selective examination) Piping fabrication & fitting quality control Stern tube alignment, filling chock fasten quality control Tail shaft
30、installation /oil seal installation / propeller installation quality control Shafting alignment & main engine/gear box/ generator installation quality control Dock mooring test & sea trial quality control Rudder system installation quality control21 Steering gear installation quality control22 Capst
31、an position determination(alignment to chain hole) quality control10.8 Electrical system installation quality control(1) When supporting for cable had to weld to hull, should not to weld the supporting to the shell plate or metal pipe, the supporting should weld to the the object than can easy for d
32、isassembly(2) The supporting for cable that weld to hull, the seam should keep away from the structure seam on hull, the distance at least 50mm.(3) The seam of supporting that for main cable, as well as seam of supporting that for engine room/weather deck/toilet/ bathroom/ kitchen/ laundry/ refriger
33、ator, to be continuous.(4) Hole on hull for cable coaming should according with the technical requirements for cutting hole and reinforcement.Edge of hole that for Cable coaming, should keep a distance at least 20mm from the structure seam, and should not cut hole on the structure seam.(5) The end a
34、nd inside wall of Cable coaming should be fillet, so can avoid cable from damnify when pull cable.(6) The supporting for cable or the pipe for cable can not use wind-welding or electric welding to cut, should use grinding machine instead. The cutting edge should grind and fillet, to avoid cable from
35、 damnify when pull cable.(7) Inspection of lay out cable should mainly including cable direction/align/fastening and construct quality。Inspection also including : different shielded cable to fasten separated or not, truss belt fasten or not, layer quantity/shade of cable.(8) Connection of cable incl
36、uding connection of conductors and earthing of the cable, more attention must be paid to the watertightness of cable glands or collors of collors of cable box as well as the eathing of metal shell of the box.(9) Electrical equipment installation including shell protection level, equipment earthing,
37、infection to equipment from ambience.(10) Special electrical equipment such as main switchboard and switchboard for emergency, should have no pipe neighborhood. In case of can not avoid, it should be no pipe coupling below the subject switchboard.(11) Ventilation / high between upper and lower platf
38、orm/gap and corrosion prevention in battery room.(12) Antenna and voyage equipment layout, mark line at fwd and aft, base horizontal requirement.10.9 Quality assurance measure In order to make sure good construction quality, have to carry out the following technological requirements： Enhance supervi
39、sory control for precision of block fabricate and precision of block assembly. Enhance supervisory control on the spot for welding sequence of important blocks and process welding of casing. Enhance quality of cutting and fitting accuracy, to make sure CO2 single welding and submerged arc-welding gr
40、oove gap can meet the regulation. Enhance supervisory control for fabricate accuracy of big outfit. Enhance supervisory control for outfit position determination accuracy(especial for strengthen under deck). Enhance management for welding material. To weld according to relate technological process a
41、nd technical document strictly. Constitute regulation for quality control of seam, including award and penalize. High tension steel and normal steel can be distinction by obvious color. After second time of get rid of rust, to cover the seam which is going to be tightness test by adhesive tape befor
42、e spray-paint. To cut hole for outfit and equipment installation, should according to mode line. Before cutting hole on main deck or shell plating, hole size and position mark to be check and confirm first.11 The responsibilities of Material administration DepartmentThe process of material control i
43、ncludes seven steps , which are purchase order requiring scheme, purchase and order ,transportation and inspection ,storing ,delivery ,and information Feedback. To meet the supply during ship building, the material must be supplied by scheme according to the construction schedule.(1) The schedule of
44、 main equipments supply.(In another chapter)(2) The material administration must be adapted the shipbuilding tray management, hull-outfit-coating integration, as well as the progress of science and technology.(3) The steel material supply program in half year should be made with soft copies , and pu
45、rchaseg monthly.(4) Improving and Standardizing equipments supply scheme.(5) The Material Administration Department must track material and equipment delivery which ordered by owner and yard, and make sure the integrity of the material and equipment as well as its size and shape.(6) Make sure the sc
46、heme of main equipment and cast steels delivery meeting the key events.(7) The process of order, transportation ,inspecting, storing and delivery of material must be carried out strictly according to the standard of cosco-shipyard . The equipments supply should be on time as soon as possible. The owner s supply should be arrived before blocks erection, stern casting steel, side thruster should be supplied before block assembly an
