Selection method for hot-dip galvanized round pipes:
1. When purchasing, the appearance, luster, and color of hot-dip galvanized round pipes are generally consistent. The pipe walls are flat and smooth, without defects such as zinc nodules, air bubbles, unevenness, dirt, and impurities that may affect future use.
2. Check if the products provided by the manufacturer have complete identification, basic manufacturer's brand, production time, product name, model size, execution standard number, etc. on the round tube, and also have product name, pipe diameter size, etc. on the hot-dip galvanized round tube, printed clearly, and the inspection identification matches the actual one.
3. You should purchase steel pipes produced by the same manufacturer, as the raw materials used for producing goods from different manufacturers may also differ. Several pipe fittings purchased by different manufacturers may be affected during welding, and long-term use may cause leakage at the weld seam.
4. High quality hot-dip galvanized circular pipes have high strength, but they are not immune to external damage, so it is not possible to try to determine whether the pipes are of high quality by throwing them. Because the impact resistance of circular pipes is superior to other pipes, they are prone to breakage when dropped, and alloy steel pipes are the ones that do not break.
Maintenance method for hot-dip galvanized circular pipes:
1. Clean with clean water
As the name suggests, it means washing the steel pipe wall with clean water. The stubborn dirt, rust, and other impurities attached to the pipe wall will not be completely removed, and this method does not have a significant cleaning effect.
2. Liquid medicine cleaning
Mixing chemical reagents in clean water can cause corrosion to the steel pipe regardless of the chemical composition, thus reducing the service life of the steel pipe. This method is generally not put into use.
3. Physical cleaning
At present, in the market, the principle of this cleaning method is usually driven by compressed air. A launcher is used to launch a specially made projectile slightly larger than the inner wall of the pipe into the steel pipe, allowing it to quickly move along the inner wall of the pipe, fully friction the pipe wall, and achieve the goal of cleaning. This technology has significant cleaning effects and basically does not harm pipelines, making it a relatively thorough cleaning method in the current market.