Tungsten; can improve the red hardness and thermal strength of steel， and can improve the wear resistance of steel
6 The end span plate is connected with the load-bearing wall. The length of the surface mesh extending into the grid support shall not be less than mm， and a transverse reinforcement shall be provided at the end of the mesh or the extended reinforcement shall be bent.
qLavalThe general alloy pipe with improved performance is variable and has high application value. The alloy pipe contains more Cr and is heat resistant Low temperature resistance Corrosion resistance. There is no aluminum alloy in plain carbon seamless steel pipe， not very little aluminum alloy， and the alloy pipe is used in crude oil Aerospace Chemical plant Power engineering heating furnace. Because the physical properties of alloy tubes are easy to change and adjust.
Galvanized pipe refers to the shape and high frequency of hollow square steel pipe welded by the back of the steel pipe during the hot rolling or cold rolling of galvanized steel plate or cold bending of galvanized steel plate， or before the galvanization of cold hollow pipe. Galvanized. Galvanized square pipe can be divided into hot galvanized pipe and cold galvanized pipe from the production process. This is because the two galvanized pipes are different，Products Show which also leads to many different physical and chemical properties.
MKele bangbesar After chromate passivation，Suri20# thick wall seamless pipeInstallation coordination attention elements the zinc coating forms white， colorful and military green， stand in the formation and development of painful microorganisms.
The whole structure is composed of zinc and quaternary crystals， forming dense crystals and barrier layer on the plate， which effectively prevents the penetration of corrosion factors. From the point of view of the strong zinc corrosion resistance of the barrier layer， when the zinc sacrificial anode is at the forefront of protection， the scratches and scratches of some coatings and the insolubility of zinc oxide layer play a protective and blocking role.
In order to strengthen the "muscles and bones" of the bridge， the construction party specially paved two layers of reinforcement mesh before pouring cement.
p Cross rolling pass system. This pass system refers to that the two open legs of the I-beam pass are not on the same side of the waist at the same time， and the waist has an included angle with the horizontal axis.
HretailerThere are several ways to clean galvanized pipes
cD Spiral seam submerged arc welded steel pipe for general low-pressure fluid transportation (SY / t- is a submerged arc welded steel pipe for general low-pressure fluid transportation such as water，Products Show gas， air and steam， which is made of hot-rolled steel strip coil as pipe blank， steel mesh， hook mesh， etc.， but its cost is much higher， and it is rarely used under normal circumstances
Excellent servicebPackaging: Welding nets are generally packaged in paper (mostly gray white， yellow， etc.) some similar to welding wire diameter welding nets，Products Show agriculture， transportation，Suri20# thick wall seamless pipeInstallation coordination attention elements mining and other industries. Such as machine shields， animal fences， flower and tree fences， window fences， aisle fences， poultry cages， baskets and decorations.
V Direct rolling pass system. The direct rolling pass system refers to the pass system in which the two open legs of the I-beam pass are on the same side of the roll axis at the same time， and the waist is parallel to the roll axis.
Straight seam electric welding steel pipe (yb- is a steel pipe whose weld is longitudinally parallel to the steel pipe. It is usually divided into metric welded steel pipe，Reinforcement, galvanized pipe, seamless pipe, welded pipe, alloy pipe, I-beam-Shandong Kaiwen metal material Co., Ltd welded thin-walled pipe， transformer cooling oil pipe， etc.
fLavalSince the s， with the rapid development trend of high-quality hot strip mill production and the development of electric welding and testing technology， the welding quality has been continuously improved， the types， specifications and models of welded steel pipes are increasing， and seamless pipes have been replaced in more and more industries. Welded steel pipes are divided into straight seam welded pipes and spiral welded pipes according to the way of welding. Classified by production mode: classified by processing technology - electric arc welded pipe， resistor welded pipe， (high frequency， low frequency) gas welded pipe， furnace welded pipe.
oP It has a thick and dense pure zinc layer covered on the steel surface， which can prevent the steel substrate from touching with any corrosion solution and maintain the steel substrate from corrosion. In general atmosphere， the surface of zinc layer forms a thin and dense zinc oxide layer， which is difficult to dissolve in water， so it plays a certain maintenance effect on steel matrix. If zinc oxide and other components in the atmosphere form insoluble zinc salts， cracks and hollows show that the construction materials are unqualified， the construction at the matrix junction is not in place and the construction personnel are poor. The external wall plastering adopts electric welding steel wire mesh， which can prevent cracking and strengthen the wall.