Simple section steel pipe -- circular steel pipe， square steel pipe， oval steel pipe， triangular steel pipe， hexagonal steel pipe， rhombic steel pipe octagonal steel pipe，Products Show semi-circular steel pipe， others.
3Most 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)， and then pave cement stabilized gravel base course on which reinforced concrete bridge deck is poured. The longitudinal reinforcement and transverse reinforcement of the reinforcement mesh of the bridge deck pavement form a network structure， 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.
pLos AngelesI-beam is mainly divided into ordinary I-beam， it is divided into wide， medium and narrow flange I-beams. The specifications of the first two are -，Products Show that is， the corresponding height is -. At the same height the light I-beam has narrow flange， thin web and light weight. Wide flange I-beam， is characterized by two parallel legs and no inclination on the inner side of the legs. It belongs to economic section steel and is rolled on four high universal mill， so it is also called "universal I-beam". Ordinary I-beam and light I-beam have formed national standards.
The rapid popularization and application of cold drawn ribbed bars and hot rolled grade III bars in China provides a good material basis for the development of welded mesh. The formal implementation of welding net product standards and application procedures has played a positive role in product quality and accelerating popularization and application.
ONarangitoSquare; Round; Fillet.
Lf Operating conditions
Welded thin-walled pipe: mainly used for making furniture， toys， lamps， thin-walled tubes made of stainless steel strip are widely used， such as high furniture， decoration，Products Show fence and so on.
In order to strengthen the "muscles and bones" of the bridge， the construction party specially paved two layers of reinforcement mesh before pouring cement.
hMetallization: refers to the process of penetrating metal atoms into the surface layer of alloy steel pipe. It is to alloy the surface layer of steel so that the workpiece surface has the characteristics of some alloy steel. Aluminizing， chromizing， boronizing， siliconizing and so on are commonly used in production.
L Seamless pipe mechanical properties， easy processing， etc;
Rmarket priceWhen excavating a tunnel in a stratum where the rock is not hard and complete， it is generally necessary to excavate a diversion pit (also known as pilot hole) and set temporary support.
nJThe development of steel bar mesh is in line with the development of energy-saving economy
Next， lets introduce the operation steps of roll adjustment during roll change. First of all， we must replace the specification and model of the welded pipe manufacturer. Generally，Reinforcement, galvanized pipe, seamless pipe, welded pipe, alloy pipe, I-beam-Shandong Kaiwen metal material Co., Ltd replace the complete set of rolls. The adjustment process of the rolls is as follows: first， draw an axis from the channel of the generator set to the import and export with stainless steel wire for adjustment， so that the holes of each frame plate are on the same axis， and the bottom line of forming ethics meets the technical standards.
Chromium can improve the hardenability and wear resistance of steel， and improve the corrosion resistance and oxidation resistance of steel
production costswAccording to the shape of the product， special flour， welding or ordinary thread connection shall be used.
LThe utility model has the advantages that the axial force of the roll is small， the axial movement is small， and the working slope is not required，
In order to ensure the welding quality of pipes， welders shall be trained， tested and qualified. In addition to the basic theory， the welder should consider the operation skills. The pipe welding process may include several postures of overhead welding， vertical welding and overhead welding (when the pipe cannot rotate). The size of current should be selected to take into account the formation of vertical welding and overhead welding (some pipes are not very large， and the current cannot be adjusted in the middle of one formation). In the process， the stability and formation of arc should be controlled， It can swing properly， and the forming shall be well combined with the necessary swing.
lLos AngelesThe surface of cold galvanized layer is smooth， 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.
fMIf the steel pipe is not welded well， that is， if it is not welded， the welding conditions of steel mesh skeleton composite pipe shall be provided.
Because the combination is strong zinc iron is miscible and has strong wear resistance;