Sistema de quilla de acero ligero de alta calidad
Galvanized square tubing is a type of hollow, cold-formed steel section with a square or rectangular profile. It is manufactured from hot-rolled or cold-rolled strip steel or coils through cold-forming and high-frequency welding, followed by a galvanizing process for surface corrosion protection. Common specifications range from 20×20 mm to 600×600 mm, with wall thicknesses between 0.8 mm and 40 mm and typical zinc coating weights of 60–275 g/m².
Galvanized square tubing is a type of hollow, cold-formed steel section with a square or rectangular profile. It is manufactured from hot-rolled or cold-rolled strip steel or coils through cold-forming and high-frequency welding, followed by a galvanizing process for surface corrosion protection. Common specifications range from 20×20 mm to 600×600 mm, with wall thicknesses between 0.8 mm and 40 mm and typical zinc coating weights of 60–275 g/m². Characterized by a uniform structure and a high section modulus, these tubes offer superior bending resistance and load-bearing capacity compared to round tubes of the same weight, while also facilitating easier positioning and assembly.
Hot-dip galvanized square tubes: Produced by immersing formed square tubes into molten zinc, these feature strong zinc adhesion and long-lasting corrosion resistance; they are suitable for highly corrosive outdoor environments and represent a mainstream choice in construction projects.
Electric galvanized (cold-galvanized) square tubes: Produced by depositing a zinc layer onto the tube surface via an electric chemical process, these feature a uniform, smooth coating and lower zinc consumption; they are better suited for dry indoor environments where a high-quality surface finish is required.
Square tubes made of ordinary carbon steel (such as Q195 and Q235) and low-alloy steel (such as Q345) can be flexibly selected based on the structural load requirements.
As a core material in steel construction, it is used to erect primary steel beams and columns, as well as roof and floor support frameworks, serving as a common structural material for large-span industrial plants and public venues.
Widely used in the primary and secondary framing for glass curtain walls; its uniform cross-section allows for the direct attachment of curtain wall mounting hardware, significantly enhancing construction efficiency.
Used in photovoltaic mounting systems for building-integrated photo voltaic (BIPV), outdoor architectural railings, municipal street light poles, and structural supports for enclosures at airports and transportation hubs.
| Galvanized Steel Pipe Square and Rectangular Tubes | |||||
| Ends | Plain, beveled, thread with couplings or sockets; | ||||
| Plastic caps and steel rings can be provided if possible | |||||
| Surface Treatment | Pre-galvanized, hot dipped galvanized, electro galvanized, black, painted | ||||
| Name of product | Size | Wall thickness | Name of product | Size | Wall thickness |
| Square tubes | 20*20 | 1.3-2.5 | Rectangular tubes | 20*30 | 1.3-2.75 |
| 25*25 | 1.3-2.75 | 20*40 | 1.3-2.75 | ||
| 30*30 | 1.3-2.75 | 25*40 | 1.3-2.75 | ||
| 40*40 | 1.3-3.75 | 30*50 | 1.3-4.75 | ||
| 50*50 | 1.3-5.75 | 30*60 | 1.3-4.75 | ||
| 60*60 | 1.3-5.75 | 40*50 | 13-4.75 | ||
| 70*70 | 1.3-5.75 | 40*80 | 1.3-4.75 | ||
| 80*80 | 13-5.75 | 50*70 | 1.3-4.75 | ||
| 90*90 | 1.3-5.75 | 50*80 | 1.3-4.75 | ||
| 100*100 | 1.5-12 | 60*90 | 1.3-4.75 | ||
| 120*120 | 2.5-12 | 50*100 | 1.3-5.75 | ||
| 140*140 | 2.75-16 | 50*150 | 1.3-5.75 | ||
| 150*150 | 2.75-16 | 60*160 | 1.3-5.75 | ||
| 160*160 | 3.0-16 | 100*150 | 2.5-16 | ||
| 180*180 | 3.0-16 | 100*200 | 2.5-16 | ||
| 200*200 | 3.0-16 | 100*250 | 2.5-16 | ||
| 250*250 | 4.75-20 | 150*300 | 4.5-16 | ||
| 300*300 | 4.75-20 | 200*300 | 5.5-20 | ||
| 400*400 | 4.75-20 | 200*400 | 5.5-20 | ||
| 500*500 | 4.75-20 | 400*600 | 5.5-20 | ||
