FAQs of Galvanized steel tube

1. What is the GI PIPE?

Galvanized square pipe is a hollow square cross-section steel pipe with a square cross-section shape and size made from hot-rolled or cold-rolled galvanized strip steel or galvanized coil plate, which is formed by cold bending and then high-frequency welding. , or galvanized square rectangular pipes made by hot-dip galvanizing the pre-made cold-formed hollow steel pipes.

2. What are the galvanizing processes for galvanized square pipes?

Galvanized square tubes are divided into hot-dip galvanized square tubes and cold-dip galvanized square tubes in terms of production technology. It is precisely because of the different processing of these two galvanized square tubes that they have many different physical and chemical properties.

3. What are the common square tube sizes?

 4.  What is the difference between electro-galvanizing and hot-dip galvanizing?

Galvanized square tubes are divided into two categories: hot-dip galvanized square tubes and electro-galvanized square tubes. Hot-dip galvanized square pipes include wet method, dry method, lead-zinc method, redox method, etc. The main difference between different hot-dip galvanizing methods is the method used to activate the surface of the pipe body to improve the galvanizing quality after acid leaching cleaning of the steel pipe. Dry method and redox method are mainly used in current production. The surface of the zinc layer of electro-galvanizing is very smooth, dense and uniform in structure; it has good mechanical properties and corrosion resistance; the zinc consumption is 60% to 75% lower than that of hot-dip galvanizing. Electro-galvanizing is technically complex, but this method must be used for single-sided coatings, double-sided coatings with different coating thicknesses on the inner and outer surfaces, and thin-walled pipe galvanizing.

5. What materials are galvanized pipes made of?

Galvanized pipes can be divided into Q195, Q235, Q345, Q355, etc. according to different materials and usage requirements. We can produce according to customers' requirements.

6. What are the uses of galvanized square pipes?

 Galvanized square tubes are divided into two categories: hot-dip galvanized square tubes and electro-galvanized square tubes. Hot-dip galvanized square pipes include wet method, dry method, lead-zinc method, redox method, etc. The main difference between different hot-dip galvanizing methods is the method used to activate the surface of the pipe body to improve the galvanizing quality after acid leaching cleaning of the steel pipe. Dry method and redox method are mainly used in current production. The surface of the zinc layer of electro-galvanizing is very smooth, dense and uniform in structure; it has good mechanical properties and corrosion resistance; the zinc consumption is 60% to 75% lower than that of hot-dip galvanizing. Electro-galvanizing is technically complex, but this method must be used for single-sided coatings, double-sided coatings with different coating thicknesses on the inner and outer surfaces, and thin-walled pipe galvanizing.

7. What are the characteristics of galvanized square pipe?

Galvanizing has stronger protective effect and strong corrosion resistance. The entire structure is made of zinc, forming a dense quaternary crystal. This crystal forms a barrier on the steel plate, thus effectively preventing corrosion factors from penetrating. Corrosion resistance comes from the strong protective barrier layer of zinc. When zinc provides sacrificial protection on trimmed edges, scratches, and scratched parts of the coating, the zinc forms an insoluble oxide layer and exerts a barrier protection function.

8.Why should I choose your company?

We guarantee that the quantity and specification of products are in full compliance with the standards of customer orders. We support any kinds of test. In addition, We also have more professional service and competitive price.

9.How many coutries you already exported ?

We exported to more than 50 countries mainly from Middle East, Russia, United States, Canada, Italy, Germany, Australia, Egypt, Chile, Mexico, Venezuela, Argentina, Kuwait, Saudi Arabia, UAE, Sri Lanka, Indonesia, Bangladesh, Turkey, India, etc.