Stair step plate (stair step plate) is a kind of stair used for platform with steel bar mesh. According to the installation method， it generally has two types: welding fixation and bolt (composition: head and screw). It is directly welded to the keel and does not need the side plate with step plate. It is relatively economical and durable， but it is not easy to disassemble Thickened side plates are required on both sides of the bolted tread plate， and holes are drilled on the side plates.
9Galvanized pipe， also known as galvanized pipe， is divided into hot-dip galvanizing and electro galvanizing. The hot-dip galvanizing layer is thick，Products Show the coating is uniform，Quinn Cold drawn seamless pipe manufacturerAlways in saturation the adhesion is strong and the service life is long. The electroplating cost is low， the surface is not smooth， and the corrosion resistance is worse than that of hot dip galvanized pipe.
fArtemisa Hot hole breaking cold rolling method. This method is dominated by expansion and expands vertical sliding and skew rolling. The former one is mainly cold rolling by relatively limited mandrel mill， cold rolling by few station mandrel mill， cold rolling by three high limited mandrel mill and cold rolling by fluctuating mandrel mill. In this way， the advantages of high efficiency， low metal material consumption， excellent product quality and excellent automatic control system are more and more widely used. The competitive advantage of the latter one is low cost and short whole process. It is suitable for the processing and manufacturing of CrMoG alloy pipes with large quantities， small types，Products Show it is widely used
The seamless pipe produced by the seamless pipe manufacturer is a long seamless pipe without any joints around and with hollow section. The thicker the wall of this product produced by the manufacturer， the higher the use value and economic value of this product. If its wall thickness is thinner， its processing composition will increase significantly Secondly， the product technology produced by this seamless pipe manufacturer often determines its limitations.
RTuttle Seamless pipe has a high position in steel pipe， and there are many large factors. The main usage has accounted for more than %， which is applicable to all walks of life. Seamless pipe factories in China are widely produced. At present， the number of factories in China is also increasing every year， which is determined by the nature and production conditions of seamless pipe. The common production processes and processes are more complex.
JcAcceptance according to standards
From the comparison of the monthly summary apparent consumption data information of galvanized pipe and the real estate sales data information from to this year， they show the consistency of height width ratio， which not only shows a positive correlation in the overall new trend，Products Show but also significantly conforms to the fluctuation direction of the monthly development trend.
Simple section steel pipe -- circular steel pipe， oval steel pipe，Quinn Cold drawn seamless pipe manufacturerAlways in saturation triangular steel pipe， hexagonal steel pipe， rhombic steel pipe， octagonal steel pipe， semi-circular steel pipe others.
uStages needing attention in the production and manufacture of alloy tubes
PThe two ends of the steel produced by the seamless pipe manufacturer shall be cut into right angles， and the burrs on the surface shall be removed， which is the raw material used by the seamless pipe manufacturer. The embryo prototube embryo needs to be cut by a cutting machine to form an embryo material with a length of about one meter， which is sent to the furnace for heating through the conveyor belt. The billet is sent to the furnace. After internal heating，Reinforcement, galvanized pipe, seamless pipe, welded pipe, alloy pipe, I-beam-Shandong Kaiwen metal material Co., Ltd the temperature is about degrees， and the fuel used is often ethyne. Temperature control in the furnace is a very key factor.
RDevelopment CurriculumSeamless pipe
aXIn building construction engineering， welded steel wire mesh is an essential heat preservation and crack prevention material. It has good performance and can take into account the unity between crack resistance and the requirements of face brick for base strength and the stability of heat preservation system.
Welded pipes with large or thick diameter are usually made of steel blank immediately， while small welded pipes and thick wall welded pipes must only be welded immediately according to nylon tape. After simple grinding and polishing， metal wire drawing is OK.
As long as the pipe material is high-strength alloy steel， including alloy steel pipes with temperature resistance， pressure resistance， wear resistance and low temperature resistance， the welding process shall be focused on preventing the tendency of martensite structure and cracks due to welding high-temperature operation. The general process requirements are that the welding rod shall be selected and baked as required and sent to the welder for use. The oil and water shall be removed before welding on both sides of the weld Rust and sundries shall be removed and cleaned. The welding line energy shall be as small as possible to minimize the swing during the welding process. The arrangement of the last weld shall have annealing effect on the heat affected zone as far as possible. Slow cooling after welding， etc.
Work coursesl Spiral seam high-frequency welded steel pipe (sy- for general low-pressure fluid transportation takes hot-rolled steel strip coil as pipe blank and is often spiral formed at warm temperature. High frequency lap welding method is selected for welding spiral seam high-frequency welded steel pipe for general low-pressure fluid transportation.
QI-beam has the dual properties of high hardness and toughness materials. Compared with other engineering wear-resistant materials in China such as various alloy steel plates， cast wear-resistant plates， cast stones， rubber， polyurethane， etc.， it has irreplaceable comprehensive excellent properties.
It is the trend of the development of steel bar industry to take the road of steel bar welding mesh in steel bar construction.
cArtemisa Chromium can improve the hardenability and wear resistance of steel， and improve the corrosion resistance and oxidation resistance of steel
qLFrom the situation of chiseling on site， the reinforcement mesh laid by the construction party is cm below the surface layer， and then the crack resistance of the reinforcement mesh can be reduced. Because of the increasing temperature， the effect of thermal expansion and cold shrinkage and the characteristics of concrete， the cracking of surface layer is significant.
Straight seam welding is adopted for larger diameter welded pipe， and spiral welding is mostly adopted for large diameter welded pipe; According to the top appearance of seamless steel pipe， it is divided into annular welded pipe and special-shaped (square， pitch， etc.); according to different materials and main purposes， it is divided into mining anti liquid transportation welded steel pipe， hot-dip galvanized welded steel pipe for bottom pressure liquid transportation， continuous conveyor idler electric welded steel pipe， etc. it is arranged from small to large according to diameter * wall thickness according to the specification， model and dimension table in the current standard.