LSAW Steel Pipe

　　Different production process would give clients various types of square steel pipe. Today, for this kind of ERW steel pipe , we will have a comparison for the hot rolled and galvanized. 　　Hot rolled square steel tubing: due to its special strength, durability and ability to withstand extreme temperatures, it is usually used for domestic and industrial applications. With the process of welded, formed and drilled, it has a wide range of application for customers. 　　Galvanized square steel tube: it is easy to weld, cut, form and machine. The galvanized coating also allows for improved corrosion resistance over other types of carbon steels. In addition, galvanized tubes are a lower cost alternative to steel to achieve rust free protection for up to 30 years, while maintaining comparable strength with a durable surface coating.

　　Different steel pipe, both seamless pipes and welded tube like ERW steel pipe , will be applied in various situations. There will be different steel pipeline’s standards in the pipe field for multifarious usage. 　　Thus, there are different demands for pipes. It is very important to know what's your application before ou inquiries. Here, we would like to compare three tubes from standard aspect. 　　API 5L: PSL 1and PSL 2 would be the normal type for this category. Whether seamless or welded type, API 5L can meet our demands with international standard requirements. 　　ASTM A53: Another popular steel pipe among engineering project. It contains from pipe, steel, black, hot-dipped and zinc-coated, welded and seamless. Generally speaking, customers will use them among mechanical and pressure applications. 　　EN10219: Used for cold formed welded structural hollow sections of non-alloy and fine grain steels, this type tube is also popular among clients.

　　We are familiar ERW steel pipe due to its wide application all over the world nowadays. Today, our topic would focus on the different standards for this pipeline and its application according to various characters. 　　1. API 5L Line Pipe for oil and gas, and we can provide different categories here. 　　2. ASTM A53 standard specification for steel pipes. ASTM steel tube has multifarious standards and you can ask for detailed information if you are interested in this type. 　　3. Black and Hot-Dipped, Zinc-Coated Welded and Seamless. No matter welded or seamless steel pipe, it is not a big problem once you purchase here in our company. 　　4. EN10217 Welded steel tubes for pressure purposes. Technical delivery conditions. Talking about pressure, low, middle and high pressure transmission tubes, you can have a look here. 　　5. Non-alloy steel tubes with specified room temperature properties. Non-alloy or alloy steel pipeline is also in our production range.

　　The answer would be uncertain. No matter the option for seamless steel pipe or welded type, the choice will rely on project’s application, because different specs and grades of steel pipe have unique characteristics. 　　Except price and other factors affecting the choice of pipelines, we will talk about the choice just from the application. 　　For welded tube, it would be popular when used for moving things like water and other low pressure products. If there is a water transportation system in a yard sprinkling, we will adopt this. Of course, structures like yard fences and more critical usage are also nice for using of welded pipe. 　　For seamless steel pipe, due to its special durable and reliable quality with the feature of no seam, seamless steel pipes might then be necessary for machinery, as the stronger steel lasts longer and is less susceptible to failure. 　　 http://www.xysteelpipe.com/info/Is-seamless-steel-pipe-better-choice-than-welded-tube-1302-1.htm

　　As summer approaches, the weather becomes hotter. We bought an air conditioner in our dormitory. When the installer installing the air conditioner, I asked him “What kind of pipe do you use?”. “copper pipe”, he answered. “And what kind of pipe is the water pipe?”, “like ERW steel pipe .” 　　And then I find there are many things are made of metal pipes in our dormitory. Among them, steel pipes uses most. At that night, I think the question “If there is no steel pipe in the world”: 　　I know that in recent years, more and more enterprises at home and abroad have replaced seamless pipe with steel pipe. Because of steel pipe, it greatly reduces our purchasing cost and improves our economic benefit. 　　I know it would be difficult for us to build a building without steel pipes. Steel pipe is widely used in the construction industry. Steel pipe is used in large shopping malls, theaters, airports and bridges and so on. 　　When we drive a car, we need to use steel pipe to discharge car e...

　　Short-distance and long distance pipeline, no matter seamless steel pipe for oil and gas transportation, or welded one for water transportation, would have great difference on choosing. 　　To some extent, working pressure and diameter would decide the pipeline’s design of framework technical parameters. 　　First of all, working pressure directly determines the number of pumping stations and compressor stations, steel consumption in the power station unit and piping. 　　Working pressure on the economy and security of the pipeline project is the first. Working pressure is an important part of the design of oil and gas pipelines, the technical and economic conditions of its great influence on the pipeline, the pipeline operating pressure is not too high; optimum working pressure gas pipeline and gas pipeline construction investment and operating costs related to; generally, the high pressure tends to work best value.

　　If your customer has affection on large diameter steel pipe, no matter ERW steel pipe or LSAW type, you would figure out the advantages for it. Thus, you will finally figure out the special treatment for large diameter steel pipe. 　　In order to achieve the standards like API, we know that large diameter pipe would have strict production process. Thus, it can serve on the engineering project like bridge piling, underwater piling, piling high-rise buildings. 　　With its good adhesion, corrosion resistance, and other traits, we will make large diameter steel tube improve traffic and transportation efficiency, reduce delivery pressure loss. 　　Coating solvent-free is another character, no leaking substances, and thus will not contaminate the transmission medium, thus ensuring fluid purity and hygiene at -40 ℃ to +80 ℃ range can be used alternately hot and cold cycles, aging, no cracks, which can in cold areas such harsh environments.

　　Hot-rolled tube blanks in cold-drawn seamless steel tubes may have defects such as cracks. At the same time, the resulting cylinders may break during use and deform, generally brittle fractures. There are many reasons, generally grain boundaries. Precipitates, this needs to be changed by some means. In order to solve the problem of cold drawn seamless steel pipe , foreign countries generally improve the performance of alloy materials by general, and generally require stress relief annealing to eliminate residual stress of materials, improve material structure, and improve plastic materials to prevent seamless steel pipe breakage. The purpose of the failure. 　　At present, the material of the cold drawn seamless steel pipe is common steel, silicon manganese, steel, and the strength of the metal is improved by cold drawing deformation, but it increases the plasticity and toughness cost of the metal. Due to the high precision of cold drawn seamless steel tubes, high-strength performanc...

　　Galvanized seamless pipes are divided into hot-dip galvanizing and cold-galvanizing. The hot-dip galvanized steel tube is obtained by reacting a molten metal with an iron matrix to produce an alloy layer, thereby combining the substrate and the plating layer. Hot-dip galvanizing is to pickle the steel pipe first, in order to remove the iron oxide on the surface of the steel pipe, after pickling, it is washed by ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride, and then fed. 　　Hot dip plating tank. Hot-dip galvanizing has the advantages of uniform plating, strong adhesion and long service life. The steel pipe matrix and the molten plating solution undergo complex physical and chemical reactions to form a corrosion-resistant structure of a zinc-iron alloy layer. The alloy layer is integrated with the pure zinc layer and the steel pipe base. Therefore, its corrosion resistance is strong. 　　1. Uniformity of galvani...

　　With the application of precision steel pipes, precision seamless steel pipes have high precision and have very good comprehensive performance. Therefore, after heat treatment, it can be applied to many working environments. It also has good corrosion resistance, which also allows it to be used to make parts for various pressure vessels. Compared to ordinary steel pipes, precision steel pipes have a smaller outer diameter. Because of its high precision, it can be used for small batch production, which is its biggest advantage. Since the performance of the steel pipe is very good, the density of the metal is also relatively high. 　　With the recognition of society, precision steel pipes are applied in various fields. The prototype of all precision steel pipes is ordinary capillary tubes. The so-called ordinary capillary tubes are usually made of steel ingots or pipe perforations, and then made by hot rolling and cold rolling techniques. Internationally, its use rate is also very hig...

　　1. Medium and heavy plate unit: It is an important production wide and thick plate for the production of straight seam submerged arc welded pipe, which is widely used in the main line of oil and gas high pressure transportation. 　　2. Furnace rolling mill: The furnace rolling mill includes a reciprocating roughing mill and a 4-roller to the finishing mill. 　　3. Semi-continuous rolling mill: including 1 rack furnace rolling mill and 5 rack finishing mill. On a semi-continuous rolling mill, the hot rolling experienced by the pipe in the finishing pass is substantially constant from one end of the pipe to the other. The time between the passes on the finishing mill is less than 3s on weekdays. 　　The output roller road includes a laminar cooling system and a take-up station. On the furnace rolling mill, the thermomechanical history of the entire length of stainless steel stamped elbow fittings has changed significantly, especially in the production of micro-stainless steel stamped e...

　　The seamless steel tubes that are common in our lives are round-tube type. So, do you know what it is used in our lives? 　　When it comes to the use of seamless steel pipes , we are most familiar with the fluid transportation of natural gas, water and other daily life. In addition to these common and well-known natural gas and water transportation, seamless steel pipes are also widely used to transport oil, gas and certain solid materials. Pipeline transportation realized by seamless steel pipes facilitates people's modern life and greatly reduces the transportation cost of natural resources. 　　Secondly, because the seamless steel pipe is hollow, its quality is much lighter than that of the ssaw steel pipe, and it is naturally more economical. Therefore, it plays an important structural part and component in the manufacture of drill pipes and bicycle frames such as automobile transmission shafts and petroleum. Character. At the same time, it also reduces unnecessary waste of r...

　　The steel pipe is divided into two major categories according to the molding method and the manufacturing method. The seamless steel pipe and the welded pipe (the welded pipe is what you call the seamed steel pipe). Seamless steel tubes can be further divided into hot rolled and cold rolled cold drawn tubes. The welded pipe can be further divided into a lsaw steel pipe and a ssaw steel pipe. The seam here does not mean that there are gaps, but the steel pipe has weld marks. After the treatment, the welder is difficult to see. 　　The two are divided according to the processing form. The seamed steel pipe is generally welded. The seamless steel pipe has two methods of cold drawing and hot drawing. The carbon steel pipe is in terms of material, and the galvanized pipe is the surface of the welded pipe after the production. Galvanized treatment. Popular: the conveyor carrier requires high, such as pressure, environment, maintenance, corrosion, temperature, etc. with seamless steel pipe...

　　In recent years, the demand for steel products by automobile and real estate enterprises has been large, which has greatly increased the demand for steel products, which has driven the development of the steel market. The steel pipe industry is one of the important basic industries in the national economy. Due to the continuous improvement of the living standards of our people and the increasingly good overall economic development, China's steel pipe market has developed rapidly. The demand for the Chinese steel pipe market will continue to increase steadily in the future. 　　Precision seamless steel tubes have the following features: 　　1. Light weight, weight is only 1/5 of the square steel. 　　2. Corrosion resistance, acid resistance, alkali resistance, salt resistance, atmospheric corrosion resistance, high temperature resistance, impact resistance, fatigue resistance, no regular maintenance. Their effective service life can reach more than 15 years. 　　3. The tensile str...

　　1. Cold-rolled steel allows partial buckling of the section, so that the bearing capacity of the bar after buckling can be fully utilized; and the hot-rolled steel does not allow local buckling of the section. 　　2. The causes of residual stresses in hot-rolled and cold-rolled steels are different, so the distribution on the cross-section is also very different. The residual stress distribution on the section of the cold-formed thin-walled steel is curved, while the residual stress distribution on the section of the hot-striped steel or welded steel is a film type. 　　3. The free torsional stiffness of hot-rolled steel is higher than that of cold-rolled steel, so the torsional performance of hot-rolled steel is better than that of cold-rolled steel. 　　Cold-rolled seamless steel pipe is divided into general steel pipe, low and medium pressure boiler pipe, high pressure boiler pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, other steel pipes, and also includ...

　　The term seamless steel pipe is believed to be familiar to many people. It is not well understood that it is only a detailed classification. Because the types and types of steel pipes are numerous and numerous, the number of pipes including plastics has reached tens of thousands in the world. These pipes are used in various ways, and every pipe from the sewer to the city plays a role. The most important role, the process development, makes thick-walled steel pipes, which are smaller than 20 diameter, into hot-selling pipes. 　　Many people may be unfamiliar, but they use this material in many channels. For example, buildings such as some other industries use seamless steel pipes because the walls of thick-walled seamless steel pipes are thick and durable. Widely used. Thick-walled steel pipes can also be used as sewage pipes. It can also be used as oil pipes. Nowadays, the underground passages of the city are indispensable for thick-walled steel pipes. Steel pipes are also used to bu...

　　We know that the ports of spiral steel pipes should be round, affecting the installation and use of spiral steel pipes, but due to external factors and other factors, the spiral steel pipes become an ellipse, so spiral steel pipe manufacturers want to avoid such problems. 　　1. For spiral steel pipe manufacturers, attention should be paid to the quality of welding. It is impossible to have welding slag. High-quality wire flux is used. The technical parameters are determined according to the wall thickness of spiral steel pipe to ensure that the performance of spiral steel pipe is stable and not easily deformed. 　　2. When loading and unloading spiral steel pipes, it should be noted that the end of the spiral steel pipe should not be subjected to impact, such as collision with hard materials, or excessive force hitting the port during loading and unloading, which may also cause port deformation. 　　3. When storing spiral steel pipes, they cannot be stacked too high, and some large...

　　The term seamless steel pipe is believed to be familiar to many people. It is not well understood that it is only a detailed classification. Because the types and types of steel pipes are numerous and numerous, the number of pipes including plastics has reached tens of thousands in the world. These pipes are used in various ways, and every pipe from the sewer to the city plays a role. The most important role, the process development, makes thick-walled steel pipes, which are smaller than 20 diameter, into hot-selling pipes. 　　Many people may be unfamiliar, but they use this material in many channels. For example, buildings such as some other industries use seamless steel pipes because the walls of thick-walled seamless steel pipes are thick and durable. Widely used. Thick-walled steel pipes can also be used as sewage pipes. It can also be used as oil pipes. Nowadays, the underground passages of the city are indispensable for thick-walled steel pipes. Steel pipes are also used to b...

　　In the process of manufacturing lsaw steel pipe , lsaw steel pipe manufacturers need to have very good control of the pressing force. This is because during the welding process, when the temperature of the edge of the two tube blanks reaches the welding temperature, they should be applying a certain pressure, which allows the metal crystal grains to penetrate each other, resulting in tightly bonded crystals for the purpose of firm welding. However, if the extrusion is insufficient, the crystals are not formed well, and the strength of the welding position will be Very low, it is easy to crack due to the action of external force during use. However, when the extrusion is too large, the welding metal reaching the welding temperature will be squeezed out of the weld position, and the true welding can be the metal that reaches the temperature will be very small, so the amount of crystallization will also decrease, which will also lead to the welding is not strong enough, but also has a l...

　　The joint formed by the lsaw steel pipe when joining the two connected bodies is called a weld bead. Both sides of the weld are subjected to welding heat during welding, and changes in structure and properties occur. This area is called the heat affected zone. Due to the welding material of the workpiece material and the welding current of the straight seam steel pipe during welding, overheating, embrittlement, hardening or softening may occur in the weld and heat affected zone after welding, which also deteriorates the weldment performance and deteriorates the weldability. This requires adjustment of the welding conditions, pre-heating of the weldment interface before welding, welding heat preservation and post-weld heat treatment can improve the weld quality of the weldment. 　　Straight-slit steel pipe is a process in which two or two kinds of materials of the same kind or different materials are integrated by atomic or molecular bonding and diffusion, and the method for causing ...