| Brief Introduction | Procedures of Demolition | Environmental Protection | HSE Management |
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Changjiang Ship-Breaking Yard Demolition Procedures of Vessel 1.0 Preparation 1.1 Vessel condition Collect information from drawing. The drawing include General Arrangement Plan, Basic Construction Plan, Shell Expansion Plan, Tank Capacity Plan, Engine Room Plan, Bridge Equipment Plan and information of ship reformation. According to the list and distribution plan of poisoned material on board from ship owner, demolition procedures are discussed. vStructural condition of the vessel should be surveyed, especially the thickness and the extent of corrosion of shell plating. v All asbestos on board should be located, marked and counted by certified persons. v Distribution of liquid (e.g. oil, water) on board should be surveyed, especially oil holds and oil holds and oil tanks. The brand name, location and quantity should be listed. v According to the list and distribution plan of poisoned material on board from ship owner, the poison, inflammable material, the explosive and other dangerous goods should be located and marked. 1.2 Development of procedures v In order to minimize the accident, safety measures are taken as follows: - To prevent fire, explosion and pollution to environment - To protect the vessel from damage of typhoon and flooding, collapse and sinking - To protect the working people from poisoning, suffocation and injury v Base on vessel 's information, the demolition procedures are developed with concerning real situation as follows: - Arrange demolition place, power supply, crane's installation and procedures of different phases to meet the required quality, safety and demolition time. - State the criteria and main points on different phases - Draft drawings of demolition sequences - State the demolition procedures of main parts (e.g. maim engine, boiler) in detail and its requirement - Make use of the steps and requirements of protective equipment of demolition -Adopt the safety and environmental measures 1.3 Mooring v The facilities of wharf are frequently examined including bollards, wires, anchors, anchor 's cables and winches. v Oil barriers should be used to protect the environment from oil leakage. v All water-tightness facilities on board should be examined, especially at the bottom and the stern of vessel. Valves at the bottom should also be closed and checked. v Access should be provided on board and boarding or leaving the vessel. vFire preventive measures should be provided for fire fighting under hotwork. v Power supply on shore should not be connected to the electrical circuits on board directly. The separate circuit should be observed easily to prevent electrical stock. 2.0 Facilities and Equipment 2.1 Hold Clearing v All oil in holds, tanks and hydraulic service tanks on board should be collected and passed to the related people of harbor Supervision Authority of Jiang Yin to handle with. v Barrels of paint, containers, high-pressure container, pyrotechnics and other inflammable or explosive material should be removed from vessel. v Closed area such as oil holds, machine room and other areas that are suspected to contain inflammable gas should be well-ventilated, free of gas and oil sludge. It should be ensured that the oil mist 's density should be below the explosion lower limit by 1%. v Treatment of oily water should be done with Harbor Supervision Authority of Jiang Yin, including the ballast water which doses not comply with discharging standards. v The amount of oxygen in oil holds should be higher than 18% v All free fighting systems including CO2, insert gas etc. should be removed. v All woodworks, equipment fittings and tools etc. should be removed. v All asbestos and fiberglass materials should be removed. 2.2 Superstructure and Deck Demolition v Demolition sequences on superstructure are from the top to the bottom and from the inside to the outside. Care should be taken to avoid sparking in oil holds. v Facilities on deck may be demolished first except the essential facilities. v Oil pipes and electrical cables should be demolished without beating. Pipes, which are located vertically to deck, should be cut without naked flame. 2.3 Engine Room Demolition v Holds clearing should be checked again to ensure that the inflammable material and the explosive are totally removed. Pressurized containers should be depressurized. v Demolition works should not be carried out on the same vertical plane. v After demolition of superstructure, facilities in engine room are given priority to be demolished. For example, steering gear system should be demolished as soon as possible to minimize local stress, which will contribute bending moment to the vessel in longitudinal direction and result in collapse and sinking of the vessel. v Aft pump room should be demolished as soon as possible without naked flame after carrying out gas-free test and removing oil sludge. That will ensure demolition of engine room facilities be in safe and also facilitate the accessibility to forward holds. v Demolition of engine room should not be in open area. v Demolition principles are as follows: - Starting with easier parts - From small to dig - From top to bottom - Port and starboard balancing - Transferring the demolished components immediately - Keeping accesses in clear v Oil pipes, which contain oil, should be handled first. Oil sludge should be removed before naked-flame demolition. The action can prevent oil pollution, fire and explosion. v To open the cover of engine room, manholes of oil tanks should be closed to avoid catching fire. If it is necessary to open, all tanks should be gas-free, well-ventilated etc. v Oily-water mixture leaked from stern tubes, water tanks and pipe should be handled instantly. 2.4 Hull Body Demolition v It is very important to balance the vessel during demolition. v Demolition of hull should follow the predetermined sequences and bases on the drawings of demolition sequences. v There are some limitations on demolition sequences: - To demolish forward and aft first and followed by amidships - To demolish components in transverse direction, then in longitudinal direction later - Not allowed to demolish longitudinal components in same transverse plane - To avoid a vertical cut though the joint of horizontal cut directly that spreads the stress on the joint vIf the engines are situated on the aft. First, demolition of forward peak hold can be carried out while demolition works on engine room 's facilities completed, demolition of Hold No.1 can be started. Furthermore, demolishing from the forward and the aft to the amidships can be started after the completion of demolition on engine room 's facilities. v Shell plating should be always examined. If cracks are observed, the support of vessel should be strengthened. v To preserve sufficient freeboard, ship strength can be maintained and seawater is prevented to flood into the holds. v Watertightness of bulkheads should be maintained to ensure that the vessel is afloat. Demolition of the double bottom should be carried out in dry dock after gas-free test as it contains oil sludge and pollutants. 2.5 Minor Strucyures v Demolished components should be clear of rust and dirt, which should be handled properly. v Components should be demolished in accordance with their profiles and collected separately. When using gas out, workers should stay at position that wind will not blow the fire to the human body. Measures should be taken to avoid breathing in heavy metal's particles including zinc, cadmium, beryllium, iron oxides, mercury and lead etc. 3.0 Precaution of Oil Disposal 3.1 Recycling v To cooperate with Jiang Yin Harbor Supervision Authority, oil on board is collected and handled properly. It is also recycled for the purpose of reusing. 3.2 Prevention of Oil Pollution v All oil board should be removed. v Oil spill though oil pipes is strictly prohibited. v When in oil leakage, oil spread should be controlled within a certain area. v Oily water is collected with two 50 m3 collection pools. v Oily water separator should be used to collect oil before discharging that minimizes the effects on intake of Jiang Yin which is located 5 km downstream. 3.3 Oil Spill Prevention and Consequences v Dealing with the oil retrieval feature and pollution consequence, a special committee is held which is responsible for developing the regulations, collection of oil, pollution prevention and oil transport. v Cooling oil of transformer should be put in labeled container according to the regulations of transport of dangerous goods. To minimize the chance of oil pollution, contingency plan of dangerous goods has been developed. 4.0 Asbestos Handling 4.1 Safe and Health Working Environment for the Workers v Control region is set up. v Control region is separated from other working areas that reduce the number of people to contact with the asbestos. v Authorized people to enter to control region should wear the mask. All people to enter to region should wear the mask. v Eating, drinking and smoking in control region is prohibited. 4.2 Disposal Method of Asbestos v To reduce direct with asbestos, the methods and process control are introduced. Even to contact with asbestos, people can suffer less with certain density that is up to the standard. v With providing mask and breathing aids, people can suffer less. v Partial ventilation and small particles collection system should be built. v All equipments such as saw, sand grind and drill, which may product asbestos dust, should be installed with partial ventilation system. v No asbestos product such as cement, mortar, coating or gypsum should be taken out from containers or bags unless it is carried out in special closed area. v Compressed air should not be used to removed the asbestos unless equipped with special ventilation system. 4.3 Protective Aids 4.3.1 Breathing Protection v Masks should be provided to workers. v Worker should wear the masks in the following conditions: - Installation or execution of process and under operation control - During repair or maintenance - When the contact of asbestos cannot be avoided. - Emergency situation. 4.3.2 Procedure of taking breath protective aid v If the working environment beyond the safe limit, breath protective procedure are required. v In order to ensure sufficient protection for our staffs in such working area, we provide the best airtight, electrical mask with filter for them. v If it was proved that the mask was unsuitable or unsafe for the worker, or it was found that the worker was unfit for duty, then we would appoint the other work for him. 4.3.3 Protective clothing and equipment for our workers v Type of protective clothing: - Overalls/boiler suits and etc. - Gloves, safety helmet and safety shoes - Mask, safety goggle and other safety equipment v Assigned changing area - Change of dirty worker clothing (with asbestos dust) should only be done within such area. - Unless authorized cleaning staffs / maintenances staffs / etc., nobody can be allowed to take away such dirty clothing out from the changing room. - All undressed dirty clothing should be put inside the assigned containers. - Labeling, markings of such containers for further disposal. v Laundry and renewal - Cleaning, drying, maintenance or renewal of the protective clothing and equipment to keep them in good working order. - No blowing or flickering of the dirty clothing is allowed. - Dirty clothing should be stowed into the enclosed containers and bags with label indicated for future disposal. 4.4 Hygiene Facilities 4.4.4 Changing Room v Changing room and locker services should be provided. 4.4.5 Shower v Worker should take shower if they have worker in which density of asbestos exceeds the required standards. v All clothes or equipment should not be brought away from the working area. 4.5 Management and Disposal of Asbestos v Treated asbestos should be packed with enclosed containers, doubled skin package and labeled with warning mark. v Health, safety and environmental protection are our priorities. v According to MSDS, treatment and dangerous goods should all comply with county and regional laws. 4.6 Emergency Plan v Density of asbestos should be monitored anytime. Worker should be educated to concern health, safety and environmental protection. v Alarm system should function well. v Rescue teams are established including three safety teams in charge chaired by principal and minister. v Medical services should be enhanced. |
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CHANGJIANG SHIPRECYCLING YARD
JIANGYIN CITY JIANGSU PROVINCE CHINA
PHONE:86-510-86168805 FAX:86-510-86031500
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