What are the categories of galvanized square steel pipes?

Galvanized square steel pipes are widely used in the construction, machinery manufacturing, transportation and other industries. With their excellent anti-corrosion performance and structural strength, they have become an indispensable key material. So, what are the specific categories of galvanized square steel pipes? What scenarios are different types suitable for? This article will give you a comprehensive explanation.

Basic definition of galvanized square steel pipes
Galvanized square steel pipes, as the name suggests, are square-section steel pipes that have been treated by a galvanizing process. The galvanized layer can not only effectively prevent the steel pipe body from oxidative corrosion due to contact with air and moisture, but also significantly improve its service life. According to different production processes and performance requirements, galvanized square steel pipes can be subdivided into multiple categories to meet the needs of different engineering projects.

Main classification of galvanized square steel pipes
1. Classification by galvanizing method
(1) Hot-dip galvanized square pipes
Hot-dip galvanizing is to immerse the entire steel pipe in high-temperature molten zinc liquid so that the zinc layer is evenly attached to the surface. The coating formed in this way is thicker, has strong bonding strength, and excellent corrosion resistance. It is suitable for use in outdoor or humid environments, such as highway guardrails, urban infrastructure, agricultural greenhouses, etc.

(2) Cold-dip galvanized square tube (electro-galvanized square tube)
Cold-dip galvanizing is to deposit a thin layer of zinc on the surface of the steel tube through the electroplating process. Although the process is simple and the cost is low, the zinc layer is thin and is mostly used for indoor structures or temporary facilities that do not require high corrosion protection, such as indoor partitions, shelf brackets, etc.

2. Classification by production process
(1) Hot-rolled galvanized square tube
The square tube formed by hot rolling is then galvanized. It is characterized by thick wall and high compressive strength. It is suitable for heavy building structures, bridge engineering and other occasions with high requirements for bearing capacity.

(2) Cold-rolled galvanized square tube
It is made of cold-rolled steel strip through forming, welding and then galvanizing. It has high dimensional accuracy and smooth surface. It is widely used in machinery manufacturing, vehicle frames, home appliance shells and other fields.

3. Classification by wall thickness
(1) Thin-walled galvanized square tube
The wall thickness is usually less than 2.0mm, light weight, easy to process, and often used in lightweight structures, billboards, simple scaffolding and other fields.

(2) Thick-walled galvanized square tube
The wall thickness is greater than 2.0mm, with strong bearing capacity, suitable for heavy-load occasions such as supporting structures, industrial frames, and mechanical equipment foundations.

4. Classification by use
(1) Structural galvanized square tube
Mainly used in building structures and steel structure projects, with high requirements for bending strength and compressive strength.

(2) Mechanical galvanized square tube
Applied in the manufacture of various types of mechanical equipment, such as conveyor brackets, equipment frames, agricultural machinery accessories, etc.

(3) Decorative galvanized square tube
Because of its smooth and beautiful surface, it is mostly used in decorative projects such as guardrails, handrails, door and window frames.

Classification and selection guide of galvanized square steel tube
Different types of galvanized square steel tubes have their own unique performance characteristics, so when choosing, comprehensive consideration should be given to the actual needs of the project. For example:

For long-term outdoor use or humid environment, hot-dip galvanized thick-walled square tubes are preferred.

For indoor decoration and lightweight structures, cold-dip galvanized thin-walled square tubes can be selected, which are both beautiful and economical.

For mechanical manufacturing and industrial applications, it is recommended to use cold-rolled precision galvanized square tubes to ensure stable size and convenient welding.

Wide application of galvanized square steel pipes in various industries
With the continuous advancement of material technology, the application scope of galvanized square steel pipes is also expanding, and currently mainly includes:

Construction field: high-rise steel structure, municipal infrastructure, bridge guardrail

Transportation: highway isolation fence, railway protection net

Agricultural field: greenhouse frame, animal husbandry facilities

Manufacturing: mechanical equipment bracket, home product frame

New energy industry: photovoltaic bracket system, wind power tower auxiliary structure

Future trend: The rise of high value-added galvanized square steel pipes
With the rise of green building and low-carbon manufacturing concepts, higher requirements are placed on the durability and environmental protection of steel. New products of galvanized square steel pipes with high corrosion resistance, high strength and lightweight are gradually emerging, such as zinc-aluminum-magnesium coated square pipes, double-layer galvanized square pipes, etc., which have become the new favorites of the market. It is expected that in the next few years, the galvanized square steel pipe industry will continue to upgrade towards higher technology and wider application.

Summary
Galvanized square steel pipes can be divided into many types according to the galvanizing method, production process, wall thickness and purpose, each with its own characteristics and wide application. Understanding the different classifications will help you to more scientifically select the galvanized square steel pipes that suit your project needs, thereby improving the quality of the project and economic benefits.

Want to know more about the specifications, standards and application cases of galvanized square steel pipes? Welcome to follow BAOWI Steel, we will continue to bring you professional industry information and high-quality product recommendations!