Classification of galvanized square tubes theoreti

2022-07-22
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Galvanized square pipe is a kind of hollow square section steel pipe with square section shape and size, which is made of hot-rolled or cold-rolled galvanized steel strip or galvanized coil after cold bending and forming and then high-frequency welding; Because galvanized square tubes are galvanized on square tubes, the application scope of galvanized square tubes has been greatly expanded compared with square tubes. It is mainly used for curtain walls, buildings, machinery manufacturing, steel construction projects, shipbuilding, solar power generation supports, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, car chassis, airports, etc. Let's take a look at the classification of galvanized square tubes and the theoretical weight specification table of galvanized square tubes

galvanized square pipe is a hollow square section steel pipe with square section shape and size made of hot-rolled or cold-rolled galvanized steel strip or galvanized coil after cold bending and forming and then high-frequency welding; Because galvanized square tubes are galvanized on square tubes, the application scope of galvanized square tubes has been greatly expanded compared with square tubes. It is mainly used for curtain walls, buildings, machinery manufacturing, steel construction projects, shipbuilding, solar power generation supports, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, car chassis, airports, etc. Let's take a look at the classification of galvanized square tubes and the theoretical weight specification table of galvanized square tubes

classification of galvanized square tubes

galvanized square tubes are divided into hot-dip galvanized square tubes and cold galvanized square tubes from the production process. It is precisely because the addition of these two kinds of galvanized square tubes is different that they have many different physical and chemical properties. In general, they have many differences in strength, toughness and mechanical properties

1. Hot dip galvanized square tube

hot dip galvanized square tube: it is a kind of square tube welded after using steel plate or steel strip to curl and form, and on the basis of this square tube, the square tube is placed in the hot dip galvanized pool and formed after a series of chemical reactions. The production process of hot-dip galvanized square tube is relatively simple, and the production efficiency is very high. There are many varieties and specifications. This kind of square tube requires little equipment and capital, which is suitable for the production of small galvanized square tube manufacturers. But in terms of strength, the strength of this kind of steel pipe is far lower than that of seamless square pipe

2. Cold galvanized square tube

and the cold galvanized square tube uses the principle of cold galvanization on the square tube used to make the square tube have anti-corrosion performance. Different from hot-dip galvanizing, cold galvanizing coating mainly uses electrochemical principle to prevent corrosion, so it is necessary to ensure the full contact between zinc powder and steel, resulting in electrode potential difference, so steel surface treatment is very important

3. The difference between cold and hot galvanizing

galvanized square tubes include hot-dip galvanized square tubes and electro galvanized square tubes. Hot dip galvanized square tubes include wet method, dry method, lead-zinc method, oxidation-reduction method, etc. The main difference between different hot-dip galvanizing methods is what method is used to activate the surface of the pipe body and improve the quality of galvanizing after acid pickling cleaning of the steel pipe. At present, dry method and oxidation-reduction method are mainly used in production, and their characteristics are shown in the table. The surface of the zinc layer of electrogalvanization is very smooth, dense and uniform; Good mechanical properties and corrosion resistance; Zinc consumption is 60% - 75% lower than that of hot galvanizing. Electro galvanizing has certain technical complexity, but this method must be used for single-sided coating, double-sided coating with different thickness of internal and external surface coating, and thin-walled pipe galvanizing

specification table of theoretical weight of galvanized square tube

calculation method of galvanized square tube

calculation of theoretical weight per meter of galvanized square tube

4* (side length thickness) *0.00785*1.06* thickness

among them, the side length and wall thickness are in millimeters. Directly substitute the value into the above formula to obtain the weight per meter of square tube, in kilograms

for a 30 x 30 x 2.5mm square tube, the weight per meter can be calculated according to the above formula: 4 x 2.5 x (30-2.5) x 7.85=275 x 7.85=2158.75g, that is, about 2.16kg

when both wall thickness and side length are in millimeters, 4 x wall thickness x (side length - wall thickness) calculates the volume of square tubes per meter of length, in cubic centimeters, and then multiplies the specific gravity of iron by 7.85 grams per cubic centimeter to obtain the weight in kilograms per meter of square tubes

summary: the relevant information about the classification of galvanized square tubes and the theoretical weight specification table of galvanized square tubes is introduced here. I hope this article is helpful to you. If there is anything else you don't understand, you can leave a message to Xiaobian below, and we will answer it for you as soon as possible

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