Heat Exchange Tube Plate Maintenance

In all petrochemical industrial, tube heat exchanger is extensively use for the completion of the material heat exchange. Most of the heat exchanger material is steel, stainless steel and copper, and tube plate and tube commonly used welding SMAW. Thus there are varying degrees of defects of weld shapes, such as depression weld stress distribution, porosity, slag, etc. is never uniform. From time to time, tube plate section will form some severe scales. After high-pressure water cleaning, circulating water dissolved the medium, resulting in the position of the tube sheet weld corrosion. Normally the main medium is dichloromethane, dichloromethane, tetrachloromethane mixture.
Halogenated metal corrosion problem is the main cause of the chemical industry heat exchanger tube plate corrosion, it seriously affect the wellbeing (condition) of the heat exchanger, resulting in a lot of damage caused. This type of industry problem had not been properly resolved for years. MIBO pays years of sustained attention to this issues; after several years of data accumulation, research, development and continuous improvement. We finally obtain the optimal program performance a high efficiency polymer repair techniques. This techniques not only able to resist a halogenated hydrocarbon solvent to cause rupture of the swollen polymer network structure and inorganic acid erosion but also has excellent resistance to penetration. MIBO’s new techniques is able to fulfill the market demand needs for these type of industrial problems.

Case Study: Repair Axle Housing Presses Hydraulic Cylinder Scratches

An auto parts manufacturer has three 2000t hydraulic machine in its axle plant punch shell section. The punching power is provided by three master cylinder. There was a problem with the primary side of the cylinder on the right. The hydraulic circuit system has design flaws, thus causing the abnormal return oil during operation, and causing the tank top parts of the valve body back to the oil system bolts break off. As a result, the valve body fall into the hydraulic cylinder on the cylinder wall causing serious and destructive scratches and extrusion marks. After a long time operation under the aforementioned condition, eventually resulting in the hydraulic cylinder cannot be stamping operations. When the problem occurs, using the conventional repair methods cannot achieve restoration. The equipment device need to be disassembled and shipped to the equipment manufacturer for repair welding or needed a replacement. This has serious impact on the company’s production. In order to meet the business requirements of continuous production, the company need to find a convenient, simple and effective method to resolve this equipment maintenance problem. The company also need a well-developed system of routine maintenance to minimize the equipment downtime.

The Micava Machinable Repair Composite technology can be used to repair the scratch of hydraulic cylinder and local guides. The manufacturers are often having problem of equipment wear and scratches. The traditional repair methods are difficult to solve these problems, and will limiting the manufacturers’ normal production. Using the Micava Machinable Repair Composite to restore the equipment is the most simple and effective method to solve the problem. Micava Machinable Repair Composite has no heat affected, no limitation to coating thickness, while the coating itself with a self-lubricating function, ensure that the equipment have good wear resistance.

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