The laying of reinforcement mesh can speed up the construction speed and shorten the construction period. In order to reduce the impact of construction on road traffic， the reinforcement and maintenance works of the two bridges are expected to be completed in the middle of next month.
3 Spiral seam submerged arc welded steel pipe (SY- for pressure fluid transportation is a spiral seam steel pipe used for pressure fluid transportation， which takes hot-rolled steel strip coil as pipe blank， often warm spiral forming and welded by double-sided submerged arc welding. The steel pipe has strong pressure bearing capacity and good welding . After various strict scientific inspections and tests， it is safe and reliable to use. The steel pipe has large diameter and high transportation efficiency， and can save the investment in laying pipelines. It is mainly used for transporting oil and natural gas.
eWaterlooI-beam has the dual properties of high hardness and toughness materials. Compared with other engineering wear-resistant materials in China，Products Show such as various alloy steel plates，Sarnia80 kg / M de tubes en acier sans soudureFaible résistance aux chocs cast stones， rubber， etc.， it has irreplaceable comprehensive excellent properties.
Classification by section shape
LRostockMetric welded pipe: it is used as seamless pipe in standard. The welded steel pipe expressed by outer diameter * wall thickness mm is welded by hot and cold strip welding of general carbon steel， high-quality carbon steel or Puneng low alloy steel， or it is made by cold drawing after hot strip welding. Metric welded pipe is generally used as structural parts， such as transmission shaft， or to transport fluid. The thin wall is used to produce furniture and lamps. It is necessary to ensure the strength and zigzag test of steel pipe.
Ts After the above process， the next step is the polishing process of stainless steel pipe. There are network standards for internal and external wall finishing of pipelines，Products Show and the internal and external surface finishing of pipelines meets the mirror standard (i.e. sanitary standard).
Why are galvanized pipes so good?
According to the shape of the product， special flour， welding or ordinary thread connection shall be used.
eI-beam is mainly divided into ordinary I-beam light I-beam and wide flange I-beam. According to the height ratio of flange to web， it is divided into wide， medium and narrow flange I-beams. The specifications of the first two are -， 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， also known as H-beam，Products Show 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， seamless pipe is widely used in oil transportation，Sarnia80 kg / M de tubes en acier sans soudureFaible résistance aux chocs natural gas， natural gas， water and some solid materials transportation. Smooth steel pipe has strong bending advantages compared with other steel pipes. And the smooth steel pipe is also light in weight. It is a very economical single-sided steel.
RMarketing Department Steel mesh guardrail (steel mesh fence) steel mesh guardrail refers to the guardrail made of steel mesh. It is stronger and more durable than the guardrail made of electric welding mesh， steel mesh， hook mesh， etc.， but its cost is much higher and it is rarely used under normal circumstances
rBGenerally speaking， the precision of seamless pipe is relatively low，Reinforcement, galvanized pipe, seamless pipe, welded pipe, alloy pipe, I-beam-Shandong Kaiwen metal material Co., Ltd and it is prone to uneven wall thickness low surface luminosity and high customization cost. At the same time， some pits or black spots are easy to appear on the inner and outer surfaces. In addition to these， the seamless pipe manufacturer needs to carry out off-line processing for its detection， and its strength is relatively high， the pressure is high， and its advantages can be reflected in the material of mechanical structure. Seamless pipe can be divided into hot extrusion， hot rolling and cold rolling stainless steel pipe according to its rolling method. In addition， different elements can also be used for classification. The inner and outer surfaces of seamless pipes shall be free from chaps， folds， cracks， cracks， scabs， delaminations and other defects. If these defects are to be removed， it is necessary to use machining. The removed seamless pipes shall not have negative deviation after the inner diameter is followed， it is not a qualified product. The allowable depth diameter of straight path of seamless pipe is less than or equal to mm， and its depth shall not be greater than . mm.
The first is people. Human factors are the control focus of welding. Therefore， before welding， welders with skilled technology and welder certificate shall be selected for necessary technical training and disclosure. It shall not be replaced at will to ensure the relative stability of the welders welding the pipeline.
First， we can clean the outer surface of the welded pipe with solvent or emulsion. This method is very effective for cleaning the oil stain， dust and other organic matters on the surface of the welded pipe.
Good reputationm Because the combination is strong， zinc iron is miscible and has strong wear resistance;
KAccording to the theory of steel structure， the I-beam flange should be stressed， that is， the I-beam should be standing rather than lying down.
Installing the pipe structure means the complexity of some elements.
oWaterloo Steel pipe with complex section -- unequal hexagonal steel pipe， five petal quincunx steel pipe， double convex steel pipe， double concave steel pipe， melon seed steel pipe， conical steel pipe corrugated steel pipe， watch case steel pipe and others.
kC Quality requirements
Welded thin-walled pipe: mainly used for making furniture， lamps， etc. In recent years， thin-walled tubes made of stainless steel strip are widely used， such as high furniture， decoration， fence and so on.