Appendix 1

Technical Standards

Introduction

As the owner’s representative, B.L supervises and technically manages the shipbuilding work at shipyard. Our work will ensure that the building should confirm to the relevant requirements of Main Specification, the building rules of Classification Society, and national and in international authorities, and the builder’s shipbuilding standard and procedure approved by the owner and class.

The following are general rules, which may be supplemented with more detailed standard if needed.

Steel Work

Material

Inspection before processing:
Check quality certificates by sample and inspect quality by visual;
All steel materials are to be stored properly.

Inspection during processing:
Necessary pre-treatment such as leveling, straightening, and de-rusting;
Forming;
Cutting;
Bending.

Assembling

Inspection of fixing and assembling of parts and members;
Inspection of block assembling, which includes:
Inspection of the pre-outfitting of parts and members;
Installation accuracy of internal structure joints and fitting inside block;
Accuracy of block configuration and its dimensional size;
Accuracy of block edges;
Levelness of face plates and location deviation of main engine bed;
Installation location of key components, such as shaft boss, rudder horn and etc.

Erection

Accuracy of marking on the shipway;
Correctness of location of the reference block;
Frame spacing at block junctions;
Straightness of keel line;
Alignment accuracy of load line and draft marks;
Principle dimensions of the hull.

Welding

Inspection before welding, which includes: welding materials: the qualification of welders; welding zone to be free of rust, scales, grease, moisture, etc, and welding codes.

Welding inspection:
All welds to be visually examined first;
Quality inspection of welded seams to be carried out according to the specified requirements. X-ray detection, ultrasonic detection or other inspection methods approved by the Classification to be adopted necessarily;
Leg sizes of fillet welds to comply with the design plan and relevant codes;
Groove sizes and seam clearance;
Preheating and heating retaining;
Welding deformation;
Sizes of welded seams;
Integrity of all-round welds;
Surface and inner defects in welding seams;

Tightness test

The location and requirements for tightness test to comply with the requirements of the Classification Society;
Cleaning of welded seams;
Test pressure;
Test procedure;
Test duration;
Inspection for deformation and leakage.

Painting work

Pre-treatment

Surface pre-treatment of steels is to be done properly. Shop primer is to be coated after de-rusting. Any damaged primer is to be touched up properly.

Painting work

Environmental conditions affecting painting operation;
Appearance of coat;
Wet film thickness and/or dry film thickness;
Thickness allocation.

During the inspection, to ensure first-class workmanship, all work should be done in strict accordance Main specifications, the painting specification between the owner the maker of paint, and the standard of the maker.

Outfitting

Pre-outfitting

Pre-outfitting of ship equipment to be carried out as extensive as
practically possible.

Certificate

All ship equipment such as hatch cover, closing appliances for windows and doors, air-conditioning system, fire-fighting should have the marine product certificates issued by the Classification Society and/or national authorities, product qualification and test reports.

Installation

Steering equipment:

• Machining accuracy of all fitting faces.
• Machining accuracy and mating gaps for rudder stock, rudder plate, tiller, rudder carrier, rudder pintle and liner.
• Location deviations of various centerlines of rudder system
• Installation precision of steer gear.

Anchoring equipment:

• Installation precision of windlass.
• Smooth engagement of anchor chains with chain heel.
• Braking ability of chain stopper.
• Mating of anchor to anchor lips.

Mooring equipment:

• Precision of installation.
• Ease of operation after installation.

Lifeboat davit:

• Strength of boat davits.
• No part of boat extruding overboard.
• Clear observation of boat-lowering and hoisting from the boat handing station.
• Distance between boat and side shell when lowering; smoothness of boat lowering.
• Simultaneous de-hooking when the boat is afloat.
• Correct installation of boat winches and accessories.

Accommodation ladder:

• Strength of ladder and easy and reliable lowering, hoisting and turning over.

Cargo gear:

• fabrication accuracy of derricks and derrick post,
• lading test of cargo gear,
• Levelness and flatness of derrick post flanges and crane seat
• braking reliability
• Precision of cargo winch installation.

Hatch cover and hatch coamings:

• Accuracy of size and shapes; installation accuracy of watertight rubber seals and their channels.
• Precision of position limiting.
• Fitness between securing wedges and wedge seats.
• Flatness of face plates on hatch coaming, difference between diagonals and hatch.
• Location of battens on hatch coaming.
• Water-tightness hatch covers.
• Easy handling.

Steel weather-tight closing appliances:

• Visual quality after welding.
• Tightness.

Air-conditioning system:

• Installation integrity of equipment, duct and fitting.
• Smoothness and tightness of ducts.
• Effect of cooling and heating.

Fire-fighting system: as per the class requirement.

Machinery work

Shafting
& propeller

Machining and assembling of shafting.
Centering and positioning of shafting;
Machining of Stern tube and stern bush;
Shafting installation on shipway;
Alignment and installation of shafting.

Main engine

As per the standard of Maker and Classification Society.

Aux.machine

As per the standard of Maker and Classification Society.

Boiler

As per the standard of Maker and Classification Society.

Piping

Fabrication

Inspection of material, such as size and visual appearance, blanking length and serial number, and stowing and maintenance.

In accordance with technical document, pipe sections should have necessary blanking and temporary sealing, and be numbered and stowed properly.

Inspection of bending includes circularity of pipe bend, height of bending corrugation of pipe bend, mechanical damage or defect, and bend angle, rotating angle and length of pipe segment after bending.

Inspection of pipe fixing includes the material, size and type of fitted pipe, marks of pipe, correct use of connector, mating clearance and groove, assembling dimensions, and position welding.

Inspection of welding includes the qualification of welder, cleaning of parts to be welded, welding material, welding deformation, and welding quality.

Pipes should be cleaned after machining and welding, to ensure there is no welding slag, spray, sharp cut nor burr on the surface. Strength test should be done in accordance with the relevant documents. After cleaning and test, seal blocking of pipe ends should be done properly.

Surfaces of pipe should be treated in accordance with the relevant requirements, such as galvanizing and painting. Pipes after different surface treatment should be segregated and stowed separately and properly.

Fixing

The inspection of pipe fitting will be carried out during block assembling, overall assembling and fixing on board. That includes:

• Fixing sequence and accuracy of coordinate dimensions.
• Cleaning of pipe end mating surface and removal of foreign matters inside the pipe.
• Size and material quality of pipe connection bolt.
• Sealing material for pipe connection.
• Connection accuracy.

The inspection will be carried out on the fixing of pipe fitting and supports. The inspection includes

• integrity and accuracy of pipe fittings,
• connection between pipe and equipment,
• supporting type and spacing of supports,
• Welding of support
• Gasket between non-ferrous pipe and support.

Tightness test

Tightness test should be carried out in accordance with the class requirement.

Flushing

Flushing of the piping system should be carried out in accordance with the class requirement.

Approval of drawings: as per the owner’s requirement.

Electric work: as per the owner’s requirement.

The inspection of sub-contractor: as per the owner’s requirement.

Mooring test and sea trial:

Witness

As per the specification approved by the owner and the class. The
outstanding recommendations should be made duly and timely.

Completion and delivery

Witness Delivery of cabins, equipment, spares and supplies;
Inspection of markings and operation instructions;
As-built drawings and delivery documents (only about technology).