Maintaining and Cleaning Bent Pipes
Bent pipes are produced using bending machines and can be manufactured through two main processes: cold bending and hot pushing. These pipes find applications in various industries, such as oil and gas transportation, liquid conveyance, and bridge construction. However, over time, these steel pipes may require cleaning, and many people may not be familiar with the proper cleaning process. To prevent corrosion in metal equipment and extend its lifespan, it's crucial to apply the right surface treatment to bent pipes, as the quality of surface treatment directly impacts the product's durability. Therefore, adhering to square payment standards for surface treatment during bent pipe production is essential for knowing how to treat the surface correctly.
Cleaning Bent Pipes:
1. During the cleaning process, use emulsion and solvents to clean the surface of the bent pipes, removing dust and grease to a certain extent. Additionally, it's essential to remove lubricants and organic substances from the surface when in use.
Rust Removal:
2. For rust removal, the steel surface should be polished, and this can be achieved by grinding with a wire brush or using electrolytic acid cleaning to remove weld slag and oxide scale. When using bent pipes, it's advisable to run them at low speed and medium loads for a period to allow them to adapt to their working condition. After the adaptation period, gradually increase the steel wire rope's running speed to increase the load.
Running-In Period:
3. When using bent pipes under heavy loads and high-speed conditions, a running-in period is necessary. During use, it is essential to coordinate with pulleys. Avoid exerting excessive force during use to prevent deformation of the steel wire rope, which could lead to structural damage, early wire breakage, strand breakage, or even rope breakage.
Cleaning of bent pipes involves effective removal of organic substances such as grease, releasing agents, and lubricants to a certain extent. However, this method does not address the removal of surface oxides, rust, and welding slag from the steel surface.
For the effective removal of surface oxides, rust, and welding slag, mechanical polishing with tools like steel wire brushes is recommended. In some cases, chemical methods like acid pickling, which can be accomplished using an electrolytic process, are also applicable. Acid pickling can partially remove oxide scale, rust, and old coatings from the surface. While chemical acid pickling can achieve the desired surface cleanliness and roughness to some extent, it has the drawback of shallow anchoring lines and may cause environmental pollution.
An alternative method for rust removal in bent pipe products is abrasive blasting. High-power motors drive nozzle blades to rotate at high speeds, allowing abrasives like bent pipe elbows, metal wires, steel shots, and steel sand to effectively impact the elbow's surface, thoroughly removing rust, oxide substances, and dirt during the treatment process.
