Whole ship coating construction procedure of newly-built ship

Abstract

Along with continuous proceeding and development of the ship industry in China, unprecedented breakthrough is made in the ship coating industry in the past tens of years, and the new scheme provides a construction procedure which is cheaper and improves the overall coating quality for overall ship construction.

Description

Technical Field

[0001] The present invention relates to the technical field of coating, and in particular to a coating construction procedure for a ship. Background Art

[0002] With the continuous progress and development of China's shipbuilding industry, the ship coating industry has also made unprecedented breakthroughs in the past few decades. This new solution provides a safer construction procedure for the entire shipbuilding process and improves the overall coating quality. Summary of the Invention

[0003] New shipbuilding full ship painting construction procedures.

[0004] Specific implementation method: (The significant feature of this process is the process ABCD and in stage B, there is no need to use sandblasting as a surface treatment method for the segments) A. To the original steel plate Preprocessing (apply shop primer), then cut, bend, weld and other operations to make the steel plate into sections B. In the segmentation stage, after removing all structural defects that affect the coating quality (such as welding slag, undercut, pores, sharp edges, etc.), only the segmentation needs to be Simple coating protection (i.e. applying a protective coating) You can choose to divide all sections or select some sections, and make the best choice according to the different technical requirements of different ships. C. From the stage of segmentation to the completion of the outfitting of the entire ship, the area is taken as a whole to carry out Painting Process and complete the designed coating system (the coating completion area is expected to be no less than 90% of the total coating area) The overall completeness of the area / completion status of other related disciplines: completely completed / not completed / mostly completed. The best choice can be made based on the actual production situation on site. Whether the simple coating protection needs to be completely removed can also be determined based on the different technical requirements of different ships. D. Before delivery, any remaining problem areas will be repaired. This process will continue until the entire vessel is painted and 100% of the coating is complete, ensuring the vessel is ready for delivery. Whether or not partial refurbishment is required before departure will depend on the vessel's current condition and the shipowner's requirements. Notes: Pretreatment: refers to the process of leveling, heating, sandblasting, applying shop primer and curing the steel plate on the production line. Coating: This refers to the process of applying paint to a substrate and ensuring the coating reaches a serviceable state after application. It consists of three parts: surface treatment (properly treating the substrate, i.e., the material to be coated, to meet the coating application requirements), coating application, and protection and maintenance before coating formation. These three parts can also be represented by three other stages: a. The substrate meets the coating application requirements; b. After the application conditions are met, the substrate is coated using an appropriate application method to complete the coating; and c. The coating reaches a serviceable state after application. The application method specifically refers to: We cover all suitable application methods for various types of liquid coatings, powder coatings, metallic coatings, and other related coatings. Pre-coating protection and assurance refers to all methods necessary to ensure that the coating can reach service status, such as ventilation, dehumidification, heating, water immersion testing, etc. Simple coating protection: only simple surface treatment is required (no need for sandblasting) and then a protective coating is applied. The coating only needs to ensure that there is no large-scale severe rust before the overall coating treatment of the area. Large-scale rust refers to the continuous severe rust area exceeding 1% of the total area of the cabin. Severe rust refers to the steel plate corrosion exceeding 1% of the steel plate depth. This definition meets all the acceptable standards for judging the degree of steel plate rust specified in GB / ISO / SSPC / NACE / AS / JIS / BS standards or equivalent standards. Surface treatment: Specifically refers to the flame cleaning, grinding, roughening, water jetting, sandblasting, water sandblasting, water washing, cleaning, dust removal, degreasing, pickling, passivation, etc. of the steel plate, damaged coating, coating that has exceeded the recoating interval, etc., which are all treated to an acceptable degree to meet the requirements of coating application. Flame cleaning: refers to the A FI level, B FI level, CFI level, D FI level specified in GB / ISO / SSPC / NACE / AS / JIS / BS standards or other corresponding equivalent standards Polishing: refers to ST1, ST2, ST3 or other equivalent standards specified in GB / ISO / SSPC / NACE / AS / JIS / BS standards Sandblasting / water blasting: refers to the SA1, SA2, SA2 specified in GB / ISO / SSPC / NACE / AS / JIS / BS standards 1 / 2 , and SA3 level or other corresponding equivalent standards Water jet / water cleaning: refers to the WJ / DC standard specified in GB / ISO / SSPC / NACE / AS / JIS / BS or other corresponding equivalent standards Roughening: refers to an on-site construction operation that feathers and layers the coating Cleanliness, dust removal, oil removal and other cleanliness indicators: Refers to the standards specified in GB / ISO / SSPC / NACE / AS / JIS / BS or other corresponding equivalent standards Pickling and passivation: Refers to the standards specified in GB / ISO / SSPC / NACE / AS / JIS / BS or other corresponding equivalent standards

[0005] Advantages of this process 1. Flexible and convenient, adapting to different ship technical requirements while improving shipyard production efficiency Whether the simple coating protection needs to be completely removed can be determined based on the different technical requirements of different ships. From the block stage to the end of the outfitting of the entire ship, regardless of whether other disciplines in the area are fully completed, the best choice can be made according to the actual production situation of the shipyard, which can maximize the assistance to the shipyard to formulate a more effective production plan, thereby effectively improving the production efficiency of the shipyard 2. Reduced shipbuilding and painting costs Because simple coating protection can choose cheaper paint, instead of choosing more expensive well-known brands such as IP, Jotun, etc. This saves the shipyard's raw material procurement costs. 3. Significantly improved the overall ship coating quality Because the coating on the water tank that was simply protected by the coating only needed to be completely removed, all subsequent water tank coatings were new coatings, and the process was a complete and continuous one. Compared to the repaired water tank coating, the coating was completely formed in one go, which significantly improved the quality. Notes: Water tank part: specifically refers to the cabin serving the fresh water / sea water environment.

Claims

1. The original steel plate Preprocessing (apply shop primer), and then cut, bend, weld and other operations to make the steel sections.

2. In the segmentation stage, after removing all structural defects that affect the coating quality (such as welding slag, undercut, pores, sharp edges, etc.), only the segmentation needs to be Simple coating protection (i.e. applying a protective coating) You can choose to divide the whole section or part of the section, and make the best choice according to the different technical requirements of different ships.

3. From the stage of segmentation to the completion of the outfitting of the entire ship, the area will be taken as a whole to carry out Painting Process and complete the designed coating system (the coating completion area is expected to be no less than 90% of the total coating area) The overall completeness of the area / completion status of other related disciplines: completely completed / not completed / mostly completed. The best choice can be made based on the actual production situation on site. Whether the simple protective coating needs to be completely removed can also be determined based on the different technical requirements of different ships.

4. Before delivery, the coating repair treatment will be carried out on any remaining problem areas. The entire vessel will be painted and 100% of the coating will be completed before delivery. Whether or not local refurbishment is required before departure will depend on the actual ship condition at delivery and the requirements of the on-site shipowner. Notes: Pretreatment: refers to the process of leveling, heating, sandblasting, applying shop primer and curing the steel plate on the production line. Coating: This refers to the process of applying paint to a substrate and ensuring the coating reaches a serviceable state after application. It consists of three parts: surface treatment (properly treating the substrate, i.e., the material to be coated, to meet the coating application requirements), coating application, and protection and maintenance before coating formation. These three parts can also be represented by three other stages: a. The substrate meets the coating application requirements; b. After the application conditions are met, the substrate is coated using an appropriate application method to complete the coating; and c. The coating reaches a serviceable state after application. The application method specifically refers to: We cover all suitable application methods for various types of liquid coatings, powder coatings, metallic coatings, and other related coatings. Pre-coating protection and assurance refers to all methods necessary to ensure that the coating can reach service status, such as ventilation, dehumidification, heating, water immersion testing, etc. Simple coating protection: only simple surface treatment is required (no need for sandblasting) and then a protective coating is applied. The coating only needs to ensure that there is no large-scale severe rust before the overall coating treatment of the area. Large-scale rust refers to the continuous severe rust area exceeding 1% of the total area of the cabin. Severe rust refers to the steel plate corrosion exceeding 1% of the steel plate depth. This definition meets all the acceptable standards for judging the degree of steel plate rust specified in GB / ISO / SSPC / NACE / AS / JIS / BS standards or equivalent standards. Surface treatment: Specifically refers to the flame cleaning, grinding, roughening, water jetting, sandblasting, water sandblasting, water washing, cleaning, dust removal, degreasing, pickling, passivation, etc. of the steel plate, damaged coating, coating that has exceeded the recoating interval, etc., which are all treated to an acceptable degree to meet the requirements of coating application. Flame cleaning: refers to the A FI level, B FI level, C FI level, D FI level specified in GB / ISO / SSPC / NACE / AS / JIS / BS standards or other corresponding equivalent standards Polishing: refers to ST1, ST2, ST3 or other equivalent standards specified in GB / ISO / SSPC / NACE / AS / JIS / BS standards Sandblasting / water blasting: refers to the SA1, SA2, SA2 specified in GB / ISO / SSPC / NACE / AS / JIS / BS standards 1 / 2 , and SA3 level or other corresponding equivalent standards Water jet / water cleaning: refers to the WJ / DC standard specified in GB / ISO / SSPC / NACE / AS / JIS / BS or other corresponding equivalent standards Roughening: refers to an on-site construction operation that feathers and layers the coating Cleanliness, dust removal, oil removal and other cleanliness indicators: Refers to the standards specified in GB / ISO / SSPC / NACE / AS / JIS / BS or other corresponding equivalent standards Pickling and passivation: refers to the standards specified in GB / ISO / SSPC / NACE / AS / JIS / BS or other corresponding equivalent standards.