Year1
- 材质：
- q235
Square tube is a hollow square cross-section lightweight thin-walled steel pipe, also known as steel cold-bent profile. It is a square-section steel with a square cross-section shape and size made from hot-rolled or cold-rolled strip or coil plate as the base material, which is formed by cold bending and then high-frequency welding. In addition to the thickening of the wall thickness, the corner size and edge straightness of hot-rolled extra thick-walled square tubes reach or even exceed the level of resistance welded cold-formed square tubes. It has good comprehensive mechanical properties, good weldability, cold and hot processing properties and corrosion resistance, and has good low-temperature toughness.
, square tube uses
The uses of square tubes include construction, machinery manufacturing, steel construction and other projects, shipbuilding, solar power generation brackets, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, Automobile chassis, airports, boiler construction, highway railings, house construction, pressure vessels, oil storage tanks, bridges, power station equipment, lifting and transportation machinery and other higher load welded structural parts, etc.
Calculation formula
Square tube weight calculation formula: *Wall thickness* (side length and wall thickness)*.
Rectangular tube weight calculation formula: {(Perimeter&.) Wall thickness}*Wall Thickness*.
Note: The above unit is /, where the unit of wall thickness and side length is millimeters, that is.
Storage methods
． Choose a suitable site and warehouse
The site or warehouse where steel pipes are stored should be in a clean and well-drained place, away from factories and mines that produce harmful gases or dust. Weeds and all debris should be removed from the site and the steel pipes should be kept clean. They should not be stacked together with acid, alkali, salt, cement and other materials that are corrosive to steel pipes in the warehouse. Different types of steel pipes should be stacked separately to prevent confusion and contact corrosion
Large steel sections, rails, steel plates, large-diameter steel pipes, forgings, etc. can be stacked in the open
Small and medium-sized steel pipes, wire rods, steel bars, medium-diameter steel pipes, etc. Steel pipes, steel wires, steel wire ropes, etc. can be stored in a well-ventilated material shed, but they must be covered with a mat. Rolled and cold-drawn steel pipes and high-priced, corrosive metal products can be stored in the warehouse
The warehouse should be selected according to geographical conditions, and generally an ordinary closed warehouse is used, that is, it has a roof with walls, tight doors and windows, and a Warehouse with ventilation device
The warehouse is required to be ventilated on sunny days, closed to prevent moisture on rainy days, and a suitable storage environment should always be maintained
. Reasonable stacking, first-in-first-out
The principle requirement of stacking is to stack according to varieties and specifications under the conditions of stable stacking and ensuring safety. Materials of different types should be stacked separately to prevent confusion and mutual interference. Corrosion
It is prohibited to store items that corrode steel pipes near the stacking position
The bottom of the stack should be elevated, solid, and flat to prevent the material from getting damp or deformed
The same kind of materials should be stacked separately according to the order in which they are put into the warehouse. yard to facilitate the implementation of the first-come-first-served principle
The steel sections stacked in the open air must have wooden pads or strips of stone underneath, and the stacking surface is slightly tilted to facilitate drainage. Pay attention to the placement of the materials straight to prevent bending and deformation
The stacking height should not exceed . for manual operation, not to exceed . for mechanical operation, and the stack width should not exceed .
There should be a certain channel between stacks, the inspection channel is generally ., and the access channel It depends on the size of the material and the transportation machinery, generally...
The bottom of the stack must be raised. If the warehouse is on a sunny cement floor, it must be raised. If it is a mud floor, it must be raised. If it is an open-air site, the cement floor should be raised, and the sand and mud surface should be raised.
Angle steel and channel steel should be stacked in the open air, that is, the mouth should be facing down, and the I-beam should be placed vertically, with the groove surface of the steel pipe It cannot be pointed upward to avoid water accumulation and rust.
． Packaging and protective layer of protective materials
The preservatives or other plating and packaging applied by the steel factory before leaving the factory are important measures to prevent the material from rusting. Care must be taken to protect it during transportation and loading, and it cannot be damaged. The material can be extended The storage period
. Keep the warehouse clean and strengthen material maintenance
Be careful to prevent the materials from being exposed to rain or mixed with impurities before entering the warehouse. Materials that have been exposed to rain or stained should be cleaned using different methods according to their properties. For example, materials with high hardness can be cleaned Wire brush, use cloth, cotton and other materials with low hardness
After the material is put into storage, check it frequently. If there is rust, the rust layer should be removed
Generally, after the surface of the steel pipe is cleaned, there is no need to apply oil, but for High-quality steel, alloy thin steel plates, thin-walled pipes, alloy steel pipes, etc. need to be coated with anti-rust oil on their inner and outer surfaces after rust removal before storage
For steel pipes with severe corrosion, it is not suitable to store them for a long time after rust removal, and should be stored as soon as possible use.
Changde square tube price_square tube specifications and dimensions_square tube spot wholesale, welcome to the website of Hunan Gerunde Pipe Industry Co., Ltd., contact mobile phone/WeChat:,, the company solemnly promises: with good quality, low Price, perfect after-sales service, to thank new and old customers, so choosing us is equivalent to choosing wealth.
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