First， the wall thickness of high-quality and smooth steel is particularly thick. Because the thicker the wall thickness of the product， the higher the economy and practicability. The thinner the wall thickness the greater the processing cost and opportunity， and the higher the resource cost. Secondly， the process of smooth steel also determines its limitations. Generally， smooth steel has low precision，Products Show uneven wall thickness low brightness inside and outside the pipe，باراكوياأنابيب سبائكبذل كل جهد لجعل خطوط الإنتاج المعالجة العميقة إنتاجًا مستقرًا high length cost， and black spots are not easy to remove. Again， the inspection and shaping need to be processed offline. Therefore， it has its advantages in high pressure， high strength and mechanical structure materials. In the process of use， we will gradually find out. In fact， seamless pipe has also entered the market in recent years. With the growth of market demand， the advantages of seamless pipe have also been stimulated. But there are also many fakes and fake products on the market. Be careful when you choose.
7 The surface of hot-dip galvanized parts is bright and beautiful.
kCondado The flange of H-beam is of equal thickness， including rolling section and combined section composed of three plates welded. All I-beams are rolled sections. Due to poor production technology the inner edge of the flange has a slope of : The rolling of H-beam is different from that of ordinary I-beam. Only one set of horizontal rolls is used. Because its flange is wide and has no inclination (or the inclination is very small)，Products Show a group of vertical rolls must be added for rolling at the same time. Therefore， its rolling process and equipment are more complex than ordinary rolling mills. The maximum height of rolled H-section steel that can be produced in China is mm， which exceeds the welded composite section.
Galvanized pipe has excellent corrosion resistance
APancheMost of the original bridge decks lack a stable and solid base course with poor integrity. It is necessary to clear the original bridge deck， excavate part of the gravel cushion (if it is non gravel filler， replace it with gravel filler and tamp it)， so it has good bonding and anchorage with the concrete， and the load can be evenly dispersed， which obviously improves the performance of the reinforced concrete structure. According to the practice test， the welded reinforcement mesh laid on the road can reduce the occurrence of cracks than the manual binding mesh.
NmAccording to the data information display information， there is an inseparable correlation between the annual real estate sales data information and the apparent consumption data information of galvanized pipe. From the consumption surface of the middle and lower reaches of galvanized pipe，Products Show decoration design， elevator car，باراكوياأنابيب سبائكبذل كل جهد لجعل خطوط الإنتاج المعالجة العميقة إنتاجًا مستقرًا handicrafts， household appliances and other industries are closely related to the situation of the real estate industry.
Oxygen blowing welded pipe: it is used as steel blowing pipe. Generally， ， ， or q-q steel strip. In order to prevent corrosion， some are aluminized.
China is a big steel country.
zWhen selecting I-beam in structural design， reasonable I-beam shall be selected according to its mechanical properties， chemical properties，Reinforcement, galvanized pipe, seamless pipe, welded pipe, alloy pipe, I-beam-Shandong Kaiwen metal material Co., Ltd weldability and structural size.
JRelatively high stability and high deformation resistance. The mixture is usually composed of hard fine aggregate graded aggregate with high sand equivalent， especially micro seal and polymer modified seal， which greatly increases the strength and integrity of the pavement.
Csuperior qualityA 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.
gWClassification by end shape
Seamless pipe
How are seamless tubes made?
Quotation sheetdThere are several ways to clean galvanized pipes
IUnder the action of thermal stress， because the initial temperature of the surface layer is lower than that of the heart and the shrinkage is greater than that of the heart， because the final cooling volume shrinkage of the heart cannot be carried out freely， the surface layer is compressed and the heart is pulled. That is， under the action of thermal stress， the surface of the workpiece is finally compressed and the center is pulled. This phenomenon is affected by factors such as cooling rate， material composition and heat treatment process. The faster the cooling rate， the higher the carbon content and alloy composition， the greater the uneven plastic deformation caused by thermal stress during cooling， and the greater the final residual stress. On the other hand， due to the change of microstructure during heat treatment， i.e. the transformation from austenite to martensite， the increase of specific volume will be accompanied by the expansion of workpiece volume， and each part of workpiece will undergo phase transformation successively， resulting in inconsistent volume growth and structural stress. The final result of the change of tissue stress is the tensile stress on the surface and the compressive stress in the center which is just opposite to the thermal stress. The microstructure stress is related to the cooling rate， shape and chemical composition of the workpiece in the martensitic transformation zone.
Pure zinc layer is a plastic zinc layer in hot-dip galvanizing. Its properties are basically close to pure zinc and have ductility， so it is flexible.
jCondado Precautions for galvanized pipe storage
nZDefect detection of seamless pipe
First， the two hole beam end space on the pier top shall be used to set the cast-in-situ transverse cantilever cantilever beam， on which the prefabricated micro bending plate shall be installed. The second is to erect prefabricated sidewalk beams in the cantilever part of the cantilever beam. The sidewalk beams of bridge openings on both sides are longer than the main beam， one end is supported on the cantilever beam of side pier， and the other end is supported on the special buttress on the embankment， which is to avoid widening the abutment.