Commonly Used Industrial Galvanized Steel Pipe Processing

The commonly used industrial galvanized steel pipe processing process mainly includes the following steps:
First, Pretreatment of Galvanized Steel Pipe:
1. Surface Treatment and Cleaning: Lightly polish the steel pipe surface to ensure it is free of moisture, aging, oil, and dust. Wipe the steel pipe surface with a cloth dampened with thinner to remove surface contaminants.
2. Alkaline and Pickling: Alkaline cleaning is performed on some steel pipe surfaces to remove oil stains. Pickling with hydrochloric acid or other acids removes scale from the steel pipe surface.
3. Rinsing and Dipping: Perform two rinses to remove residual acid and iron salts adhering to the steel pipe surface. Flux is used to remove all impurities from the steel pipe surface, ensuring clean contact between the steel pipe and the zinc bath, resulting in a good coating.

Second, Hot-Dip Galvanizing of Galvanized Steel Pipe:
1. Galvanizing Preparation: The zinc bath temperature must be strictly controlled at 450±5°C to ensure uniformity and quality of the zinc coating.
2. Dip Galvanizing: After drying, the steel pipes are removed one by one from the drying furnace chain and dipped into the roller conveyor. They are then transported to the galvanizing furnace and rolled into the galvanizing spiral in the galvanizing machine.
3. Spiral Galvanizing: The galvanizing spiral is arranged at different phases, causing the steel pipe to tilt along the spiral. As the spiral rotates, the steel pipe moves downward, forming an angle, before entering the zinc bath and continuing downward, ensuring uniform galvanizing coverage.
4. Lifting and Moving: After galvanizing, the steel pipe is lifted onto the surface of a magnetic roller, where it is attracted and moved to the removal roller conveyor for subsequent processing.

Third, Post-Processing of Galvanized Steel Pipes:
1. Cooling: After galvanizing, the galvanized steel pipes need to be cooled, typically using tap water for rapid cooling to prevent deformation and ensure the galvanized layer solidifies.
2. Passivation and Rinse: After cooling, the galvanized steel pipes undergo passivation to enhance their corrosion resistance. Rinsing is then performed to remove surface residue.
3. Inspection and Quality Control: Galvanized steel pipes undergo quality inspection, including the thickness, uniformity, and adhesion of the galvanized layer, to ensure compliance with national standards and customer requirements.

Fourth, Packaging and Transportation of Galvanized Steel Pipes:
1. Packaging: Qualified galvanized steel pipes are packaged, typically with rust-proof paper or plastic film, to prevent damage during transportation and storage.
2. Transportation: Based on customer needs and order specifications, we arrange appropriate transportation methods to ensure the safe and timely delivery of the galvanized steel pipes to their destination.