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The sickle bending and wave shape usually appear during the rolling of cold-rolled strip, which is caused by improper reduction control. In the production process of ERW steel pipe, how to ensure that the product quality meets the requirements of technical standards and the needs of customers? An analysis of the factors that affect the product quality during the production of steel pipes. Due to the bite of the edges of the steel strip, this makes the steel strip easy to crack and crack during the welding process, and affects the stability of the welding quality. The high yield point and tensile strength of the steel strip will make it difficult to form the steel strip, especially when the pipe wall is thick, the material has a large rebound force, the steel pipe has a large deformation stress during the welding process, and the weld seam is prone to cracks. When the tensile strength of the steel strip is greater than 635 MPa and the elongation is less than 10%, the weld seam is liable to crack during the welding process. Raw materials accounted for 32 . 1. Therefore, the fluctuation of the steel strip width not only affects the accuracy of the outer diameter of the steel pipe, but also seriously affects the surface quality of the steel pipe. The influence of raw materials on the ERW steel pipes. The common steel used for welded steel pipes is carbon. aspect. Before welding, the surface quality and geometric dimensions of each coil shall be checked. It can be seen that the mechanical properties of materials have a great influence on the quality of steel pipes, and the quality of steel pipes should be effectively controlled from the perspective of material strength.1. According to the statistics of non-conforming products of Φ76mm high-frequency welded steel pipe unit in a certain month, it is believed that the factors that affect the quality of dc fan steel pipe products during the production process are raw materials, welding process, roll adjustment, roll material, equipment failure, production environment, and other reasons.44%, below will introduce the infect of material to ERW steel pipe.2) The influence of surface defects of steel plates on the quality of steel pipesCommon surface defects of steel strips include sickle bending, wave shape, longitudinal shear bite, etc.. During the steel tube forming process, sickle-shaped bending and wave deformation will cause the steel plate to deflect or overturn, which may easily cause overlap welding of steel pipes and affect the quality of steel pipes. Edge banding of steel strips usually occurs on longitudinal shear bands, which are caused by blunt or sharp disc blades for longitudinal shear. The factors that affect the quality of raw materials are mainly the three aspects of the unstable mechanical properties of the steel strip, the surface defects of the steel strip and the large deviations in geometric dimensions. Therefore, we should focus on these three aspects. When the tensile strength is lower than 30 MPa, the surface of the steel strip is easily wrinkled due to the soft material during the forming process. The influence of the mechanical properties of steel strips on the quality of steel pipes. 3) When the width of the steel strip is less than the allowable deviation, the influence of the geometrical dimensions of the steel strip on the quality of the steel pipe reduces the extrusion pressure during welding of the steel pipe, which makes the welding of the steel pipe unstable, cracks or openings appear; When the tolerance is allowed, the extrusion pressure during the welding of the steel pipe will increase, and sharp nozzles, welding defects such as lap welding or burrs will appear at the welding place of the steel pipe. If the quality of the steel strip does not meet the standard requirements, production shall not be carried out to avoid unnecessary losses

You will not encounter such issues if you choose stainless steel jewelry because they don't get stained and they are very sturdy. Another reason why it is a good decision to choose stainless steel jewelry is that these accessories are made with durable and high quality materials. This metal can maintain the way it looks for so many years due to its remarkable resistance to rust and corrosion. Silver and gold are both attractive and lovely metals and this is the reason why they became a standard choice for jewelry of most people. Buying this type of jewelry is one of the most economical ways of accessorizing your outfit. . If you are looking for jewelry pieces such as necklace, bracelets industrial fan and earrings that can last a long time, stainless steel is an excellent material to choose. There are many reasons why people prefer wearing Joyas jewelry today. Even if there are a lot of different types of materials used in manufacturing jewelry, one specific material stands out and that is stainless steel. Necklaces, rings, earrings and bracelets for men and women are all part of the items made in this fashionable jewelries.In the recent years, wholesale 316L stainless steel jewelry has transformed elegantly. Because of this fact, you are assured that these items will last a long time. Nowadays, there are plenty of wholesale jewelry manufacturers that offer much more unique and creative pieces to cater to the individual tastes and preferences of customers. Basically, it is made up of 50 percent or more iron and 10.

Finally, stainless steel jewelry is highly durable compared to other joyas necklace metals like silver and gold. First of all, these items made from stainless steel are without any doubt flexible and versatile.5 percent or more Chromium. Whatever reason you have in mind, you are rest assured stainless steel jewelry pieces will meet your preferences and needs in a satisfactory way. They work great not only for casual occasions but also during formal events. This has become very popular over the years. Others do so because they want to look more attractive. With the technology we have today, gold plating as well as different colored dyes are being used in producing some of the sophisticated and artistically designed pieces. Aside from that, this stain resistant metal is also bright as it reflects light. One of the reasons why most people buy and wear jewelry is because they want to own something ornate. Its high polished shine provides that look of white gold but is relatively lower in prices as the cost of gold and silver. But these two metals have their own issues and one of them is staining. Therefore they have dc fan to be handled with care and must be polished regularly. This shiny metal's quality is evident in its durability making it capable to withstand the test of time. The best thing about stainless steel jewelries is they perfectly go well with any kind of wardrobe or outfit. They easily stain which further translates they can be damaged or smudged very easily

Steel pipe storage space and select the appropriate warehouse, storage space or warehouse of steel pipe should be selected in the clean, smooth drainage area, away from harmful gases or dust factories. Small and medium steel, wire rod, rebar, the diameter steel pipe, steel wire and wire rope. Other reasons may be in the process of dc fan transportation steel pipe surface was wet with rain, and at that time did not take reasonable action steps in the installation of corrosion are not fully demonstrated, after a period of time hidden problems gradually broke out. Different dual inlet fan varieties of steel pipe should be piled separately to prevent confusion and prevent contact corrosion. Presence on the ground to clear the weeds and all debris, steel pipe to keep clean. Environmental reasons, this is mainly because the use of the process, and the coexistence of steel tubes filled with a lot of space, but also easily lead to rusting steel pipe gas or a solution, the solution is likely to be a gas or volatile gas effect and alloy steel tubes surface, making the steel pipe corrosion phenomena occur. Safekeeping and storage methods are correct steel pipe which is important to prevent rust.. Large steel, rail, shame steel, large diameter steel pipe, forgings, etc.Selection problem, as everyone knows, not by a single steel pipe steel material composed of steel material may not notice the problem in the selection of the time, and so the material will be melted in a melting pot inside, in the production process of a number of additions to the inside after the alloying elements into the mold after quickly on forming a steel pipe, steel pipe though at this time able to withstand high temperature and pressure test, but due to neglect in the selection above rusty detail, relatively speaking, anti-rust capacity is relatively weak, For businesses, in the selection of steel pipe when we should be careful not to choose the inferior product. And to prevent this phenomenon, in transport or when stacked steel pipe also pay attention to pay attention to some of the techniques, so as to prevent the steel pipe is corroded., may open dumps. In the warehouse can not with acid, alkali, salt, cement, etc. There are aggressive on the steel pipe material stacked together. In order to avoid corrosion steel pipe appears to be a phenomenon in the use of steel pipe in the process, to avoid easily lead to substance coexist with its rusty