The surface of cold galvanized layer is smooth， dense and uniform. It has good mechanical properties and corrosion resistance. The consumption of hot-dip galvanized coating is between % - %. The galvanizing process is complex but the thickness of single-sided coating， surface coating and double-sided coating is different， so the thin-walled pipe shall be galvanized. The zinc coating has strong protection and corrosion resistance.
5Classification by use
aPataraDue to the relatively high and narrow section size of ordinary I-beam and light I-beam， the moment of inertia of the two main sleeves of the section is quite different， which makes it very limited in the scope of application. The use of I-beam shall be selected according to the requirements of design drawings.
If the steel pipe is not welded well，Products Show that is，TuriyarbaCombien coûte 50 tubes galvanisés par mètreFacteurs sujets aux stomates if it is not welded， the welding conditions of steel mesh skeleton composite pipe shall be provided.
Lmauritius According to the purpose， the welded pipe has general purpose and high temperature and high pressure. The pipe used in the latter is often special alloy steel. The problem of shrinkage cracks in the welding process and the mechanical properties of the pipe in the heat affected zone must be considered and solved， the construction party specially paved two layers of reinforcement mesh before pouring cement.
Hardness of reinforcement construction of reinforced mesh on concrete bridge deck; Including key lime mixing and packaging materials you need to pay attention to calculating the size of the building， and the calculated specifications must meet the quality standards and construction standards.
In order to improve the corrosion resistance of steel pipe，Reinforcement, galvanized pipe, seamless pipe, welded pipe, alloy pipe, I-beam-Shandong Kaiwen metal material Co., Ltd the general steel pipe (black pipe) is galvanized. The galvanized pipe is divided into hot-dip galvanizing and electric steel zinc. The hot-dip galvanizing layer is thick and the cost of electric galvanizing is low， so there is galvanized pipe.
fI-beam， whether ordinary or light， can only be directly used for bending members or lattice members on its Web because of its large and narrow section size and large moment of inertia difference between the two main axes on the section. It is not suitable for axial compression members and flexural members perpendicular to the web plane， so its application range is very limited. I-beams are widely used in buildings and other metal structures.
KThe preparations for the construction of high-speed reinforcement mesh include the preparation and inspection of raw materials， the inspection and acceptance of the lower layer of the pavement，Products Show and the preparation of construction equipment and engineering machinery.
Rinstall Ditch cover plate (ditch cover plate) is widely used in municipal roads， garden facilities， residential quarters， schools，TuriyarbaCombien coûte 50 tubes galvanisés par mètreFacteurs sujets aux stomates stadium pipes and other places.
oQGalvanized pipe: the hot-dip galvanized pipe base plate and molten electroplating solution are combined physically and chemically to form a dense corrosion-resistant structure of zinc iron alloy layer. The alloy layer is integrated with the pure zinc layer and the steel pipe substrate. Therefore， it has strong corrosion resistance.
A major defect is its instability to the corrosion process， which can not resist all factors. Producers need a solution that can solve the corrosion problem. The decision has been found. They become a galvanized steel pipe.
General carbon steel wire sleeve (GB / t- is a steel pipe used to protect wires in electrical installation projects such as industrial and civil buildings and installation of machinery and equipment.
Quality departmentnWith the development of Chinas infrastructure， the investment in infrastructure continues to grow; Implement the strategy of western development. Economic construction has entered a new stage，Products Show and the demand for welded steel mesh for capital construction such as power， transportation， water conservancy， housing and municipal engineering will increase exponentially.
P→ wide flange and large lateral stiffness. Strong bending resistance.
However， these pipes， like other metals， remain stable and will not be affected by high temperature.
yPataraWire sleeve: it is also a general carbon steel welded steel pipe. It is used in concrete and various structural power distribution projects. The commonly used nominal diameter is from -mm. The wall of wire sleeve is thin， which is mostly used after coating or galvanizing， and cold bending test is required.
kP The surface of hot-dip galvanized parts is bright and beautiful.
Classification by section shape