1. Production process

Galvanized pipe is based on ordinary steel pipe, and a layer of zinc is plated on the surface through hot-dip galvanizing process. This process can increase the corrosion resistance and service life of steel pipe.

Pre-galvanized pipe, on the other hand, has the zinc layer combined with the steel pipe matrix during the production process, usually by electroplating or hot-dip galvanizing. Therefore, the zinc layer of pre-galvanized pipe is more uniform and firm.

2. Corrosion resistance

Since the zinc layer of galvanized pipe is added after the steel pipe is produced, its corrosion resistance may be affected by the galvanizing process and the quality of the zinc layer.

In contrast, the zinc layer of pre-galvanized pipe is more tightly combined with the steel pipe matrix, so it has better corrosion resistance. In humid or corrosive environments, pre-galvanized pipe can provide longer protection.

3. Service life

The service life of galvanized pipe is affected by many factors, such as galvanizing quality, use environment, etc. In harsh environmental conditions, galvanized pipes may require more frequent maintenance and replacement.

Pre-galvanized pipes usually have a longer service life due to their excellent corrosion resistance, reducing the frequency of maintenance and replacement.

4. Price

Generally speaking, the price of pre-galvanized pipes is usually slightly higher than that of galvanized pipes due to the complexity of the production process and the advantages of zinc layer quality. However, considering its longer service life and reduced maintenance costs, the cost performance of pre-galvanized pipes is still very high.

In summary, there are significant differences between galvanized pipes and pre-galvanized pipes in terms of production process, corrosion resistance, service life and price. When choosing, you should weigh the specific needs and budg.