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galvanized square pipe
galvanized square pipe
galvanized square pipe
galvanized square pipe
galvanized square pipe
galvanized square pipe

4 × 4 square pipe annealed galvanized steel pipe round pipe

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  • Description:

Galvanized square pipe is a hollow steel with a square cross-section that can be made by two different processes.Galvanized square pipe can be divided into hot galvanized square pipe and cold galvanized square pipe according to the different production process two categories.

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Out DiameterPre gaIvanized:l/24(21.3114.3mm). Such as 38.1mm, 42.3mm, 48.3mm, 48.6mm or as customer request.

Hot dipped galvanized:l/2"-24"(21.3mm-600mm).Such as 21.3mm, 33.4mm, 42.3mm, 48.3mm, 114.3mm or as customer request.
ThicknessPre galvanized:0.6-2.5mm.

Hot dipped galvanized: 0.8- 25mm.
Zinc coatingPre galvanized :5|im-25|im

Hot dipped galvanized:35|im-200|im
TypeElectronic Resistance Welded (ERW)
Steel GradeQ235, Q345, S235JR, S275JR, STK400, STK500, S355JR, GR.B-D
StandardBS1139-1775, EN1039, EN10219, JIS G3444:2004, GB/T3091-2001, BS1387-1985, DIN EN10025, ASTM A53 SCH40/80/STD, BS-EN10255-2004
Surface FinishPregalvanized, Hot dipped galvanized, Electro galvanized, Black, Painted, Threaded, Engraved, Socket.
International StandardISO 9000-2001, CE CERTIFICATE, BV CERTIFICATE
Remark1. Payment terms: T/T ,L/C 2. Terms of trade : FOB ,CFR,CIF ,DDP,EXW

3. Minimum order: 2 tons

4. Delivery time : Within 25 days.


Galvanized square pipe is a hollow steel with a square cross-section that can be made by two different processes. One method is to use hot-rolled or cold-rolled galvanized strip steel or galvanized coil as raw materials, through cold bending processing, and then use high-frequency welding technology to make it into a fixed size square cross-section shape. The other method is to hot-dip galvanized the cold formed hollow steel pipe, so as to obtain galvanized square rectangular pipe.

Galvanized square pipe can be divided into hot galvanized square pipe and cold galvanized square pipe according to the different production process two categories. Due to the differences in processing methods, these two galvanized square pipes have significant differences in physical and chemical properties. In terms of strength, toughness and mechanical properties, both have their own characteristics and advantages.

Hot-dip galvanized square pipe:

Hot-dip galvanized square pipes are made by crimping steel plates or steel strips into the shape of square pipes and welding them, and then placing these square pipes into a hot-dip galvanized pool after a series of chemical reactions. The production process of hot-dip galvanized square pipe is relatively simple, the production efficiency is high, and the product specifications are diverse. The production of this kind of square pipe requires less equipment and capital investment, which is very suitable for smaller galvanized square pipe manufacturers. However, from the point of view of strength, the strength of this steel pipe is usually lower than that of seamless square pipe.

Cold galvanized square pipe:

Cold galvanized square pipe is based on the original square pipe, using the principle of cold galvanized to give the square pipe anti-corrosion performance. Different from hot-dip galvanizing, cold galvanizing mainly relies on electrochemical principles to achieve anti-corrosion effects. Therefore, it is necessary to ensure that the zinc powder is in full contact with the steel surface to form the electrode potential difference, which requires the treatment of the steel surface to be very important.

Difference between hot and cold galvanizing:

Galvanized square pipe is mainly divided into hot dip galvanized square pipe and electric galvanized square pipe two types. Hot-dip galvanized square pipe has a variety of different treatment methods, including wet method, dry method, lead-zinc method, REDOX method and so on. The main difference between these different hot dip galvanizing methods is what method is used to activate the surface of the pipe after the acid dip cleaning to improve the quality of galvanizing. At present, the production process mainly uses dry method and REDOX method. The surface of zinc layer of electrogalvanized square pipe is very smooth, compact and uniform, and has good mechanical properties and corrosion resistance. Electrogalvanizing can save 60% to 75% zinc consumption compared to hot dip galvanizing. Although electrogalvanizing is technically more complex, it is usually necessary to use electrogalvanizing methods for single-sided coating, double-sided coating with different thickness of internal and external surface coating, and thin-walled pipe galvanizing.

About Us

The company mainly deals in color-coated, galvanized, stainless steel pipes, stainless steel coils, stainless steel plates of various materials; hot-rolled series of rebar, medium and heavy plates, coils, I-beams, angle steels, channel steels, H-beams and other steel products and deep processing Service. (The company’s annual inventory is more than 50,000 tons).The company adheres to the concept of “integrity first, service-oriented”, relying on the strong strength of major domestic steel groups, exerting the company’s strong resource integration capabilities, and serving and satisfying the needs of customers both in China and at abroad.Additionally, Zhishang Steel also has a powerful and professional logistics distribution system, which can provide customers with efficient, fast and flexible logistics services at any time.Our business covers Southeast Asia, the Middle East, Africa, Australia, Europe, the United States and other countries.Looking forward to the future, in order to maintain in-depth and stable cooperation with customers both at home and abroad, all employees of Zhishang Steel will work harder to provide Better products and services to create more added value for customers.

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