steel tube

 Carbon steel pipe & tube welding technical requirements: 1) Preparatory work Before welding carbon steel pipes, the following preparatory work is required: 1. Clean the surface of the pipe: Since some dust and grease may adhere to the outer surface of the carbon steel pipe, it is necessary to use tools such as pickling or wire brush to scrape off the attachment on the surface of the pipe to ensure that the surface of the pipe is clean and the welding quality is high. 2. Welding equipment: Inverter DC welding machine is used for welding, and cable wiring needs to be carried out in advance to ensure the safety and stability of the power supply. 3. Selection of welding rods or wires: Choose welding rods or wires of different materials and specifications according to the requirements of the pipeline material and usage scenarios. 4. Preheating: By heating, around the weld position to reduce and prevent the occurrence of cold cracks. 2) Equipment requirements When welding carbon ste...

 The steel pipe is a steel product, and there is a problem of being oxidized and rusted in an open-air environment. The longer it is used, the greater the possibility of rusting. For example, after a carbon steel pipe is rusted, it will be corroded, its performance will decrease, it will become more brittle, and it will break easily, which will bring risks in use. So how to prevent the steel pipe from rusting? You can refer to the following three methods. 1. Alloying to change the internal structure of iron. For example, adding chromium, nickel and other metals to ordinary steel to make stainless steel greatly increases the rust resistance of the steel. 2. Covering a protective layer on the surface of the steel pipe is a common and important method to prevent iron products from rusting. According to the composition of the protective layer, it can be divided into the following types: ① Coating mineral oil, paint or firing enamel, plastic spraying, etc. on the surface of iron product...

 Welding problems are sometimes encountered during the installation of carbon steel tubes. So, how to weld tubes? What should we pay attention to when welding carbon steel tubes? 1. Gas welding Gas welding can be used for welding, which is to mix combustible gas and combustion-supporting gas together, use it as the heat source of the flame, and then melt and weld the pipes together. 2. Arc welding Arc welding can also be used, that is, arc welding is used as the welding method. A heat source that connects the pipes together. This welding method is often used in industrial production. In addition to the above two methods, the welded pipeline can also use contact welding, and the specific method to be welded depends on the material and requirements of the pipeline. Steel consists of iron and carbon with small amounts of miscellaneous metals, such as manganese, chromium, silicon, vanadium, and nickel. Low carbon steel contains only 0.3 percent carbon, making it incredibly easy to weld...

　　Carbon steel pipe can be divided into seamless steel pipe , straight seam steel pipe, spiral steel pipe, high-frequency welded steel pipe. Rolled seamless carbon steel pipe is the raw material of round tube, tube embryo to be cut through the cutting machine into a length of about 1 m of blank, and the conveyor belt to the furnace heating. The billet is fed into a furnace and heated at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. After the round tube billet to go through the pressure piercing machine to wear empty. Generally more common punching machine is conical roller piercing machine, this punching machine production efficiency is high, product quality is good, perforation expansion diameter large, can wear a variety of steel. After piercing, the round tube blank has been three-roll cross-rolling, rolling or extrusion. Squeeze after the tube diameter. Sizing machine through the high-speed rotation of th...

　　T-welded carbon steel pipe containing Ni in the acidic environment, strong corrosion resistance in the presence of sulfuric acid or hydrochloric acid environment, the T-shaped welded carbon steel pipe in the higher the content of Ni, the stronger the corrosion resistance. In the general environment, only in the T-shaped welded steel pipe to add Cr to prevent the phenomenon of erosion. The poor edge of the strip is another cause of the wrong side of the important reasons. Mass flow rate, heat flux, and structural parameters (helical curvature diameter and T / D ratio) on the saturated bubble boiling heat transfer coefficient in the vertical spiral tube were investigated. 　　Welded carbon steel pipe in the production, the wrong side occurs, its impact on many factors. In the production practice, often by the wrong side of the wrong side of the steel pipe downgrade. Therefore, it is necessary to analyze the cause of the spiral steel pipe misalignment and its prevention measures. 　　A...

　　There are more and more people choose to use carbon steel pipe in the construction. Why? Next, Prime Steel Pipe will show you some advantages of carbon steel pipe for all of you. 　 　A.Safe and durable 　　We all know that steel is a frequently-used material because it is durable and safe. Since steel is non-combustible and makes it harder for fire to spread, it is good to use when building homes. Carbon steel pipe is highly resistant to shock and vibration. Fluctuating water pressure or shock pressure from a water hammer have little effect on steel. And carbon steel pipe is practically unbreakable in transport and service, and for this reason it is okay to lay water mains under roadways. 　 　B. Environmental protection 　　Using steel for pipes is not only safer for people, but it is safer for the earth. Steel can be recycled. Each year, about 70 percent of all steel is recycled in North America, more than paper, aluminum, plastic and glass combined. Steel products can be recycle...

　　When purchasing steel pipe fittings, it’s important to take into consideration certain factors, most importantly size and shape, to ensure that it is a perfect match for your specific purpose. However, another important aspect to consider is the material used in the making of the pipe fitters. Certain elements added to the steel, such as carbon and chrome, can dramatically affect its strength and appearance. Here are a few great reasons to invest in carbon steel pipe fittings as well as chrome plating. 　　Durability 　　Steel is one of the most popular types of pipe fittings and has been used for construction of pipes and pipe fittings for years because of its durability and strength. However, carbon steel, or plain-carbon steel, has the ability become much stronger through heat treatment. The more carbon added to the steel, the stronger it can become, which is why it is considered one of the strongest types of steel. Another way to increase the durability is to create a harder sur...

　　Low carbon steel pipe has a large aging tendency, which means low carbon steel pipe has both quenching aging tendency and deformation aging tendencies. When the steel from the rapid cooling of high temperature, ferrite scraping carbon, nitrogen supersaturation, the formation of iron carbon nitrogen started slowly at room temperature. Which leads to the increase of strength and hardness, and the decrease of plasticity and toughness. This penomenon known as quenching aging. Low carbon steel pipe will produce aging even if not quenched and air cooled. 　　 Carbon steel pipe and nitrogen atoms interact with dislocations, and carbon and nitrogen atoms gather around the dislocation lines. This combination of carbon and nitrogen atoms and dislocation lines is called the Koch's air mass. It will increase the strength and hardness of steel and plasticity and toughness reduced, a phenomenon known as deformation aging. 　　Compared with quenching, deformation of low carbon steel pipe has a...

　　The contents of the welded steel pipe welding inspection include the inspection of the materials, tools, equipment used in the whole production process, process and finished product from drawing design to product completed. It is divided into three stages: pre-weld inspection, inspection in welding process, finished product inspection after welding. According to whether damage the welded carbon steel pipe or not, test methods can be divided into destructive testing and non-destructive testing two categories. 　　 Pre-weld inspection 　　Pre-weld inspection includes the inspection of raw materials (such as base metal, electrodes, flux, etc.) and the inspection of welding structure design. 　　 Inspection in welding process 　　Inspection in welding process includes the inspection of welding process specifications, the inspection of weld size, the inspection of fixture conditions and structural assembly quality. 　 　Finished product inspection after welding 　　There are many methods...

　　After the processing of the carbon steel pipe is complete, there will be some twists and turns, and the reduction of these twists and turns has to rely on the straightening machine to complete. Therefore, almost all the processed carbon steel pipe have to be straightened by the straightener. 　　The meandering of a carbon steel pipe is due to improper adjustment of the rolling mill, residual stress remaining during rolling, and formation of unequal cooling along the section and length of the tube. Therefore, it is not possible to obtain very straight tubes from the rolling mill, as long as the rules of skill conditions are satisfied by the tortuosity of the cold straightened tubes. 　　The fundamental reason for the straightening is to make the carbon steel pipe go through an elastoplastic tortuosity, and the large tortuosity becomes a small degree of tortuosity. Therefore, the steel tube needs to be repeatedly twisted and twisted in the straightener. The degree of repeated twists a...

　　1. Composition: Stainless steel pipe is a kind of nickel-chromium steel, which comes out of carbon and iron, as well as nickel, chromium, manganese and copper. Carbon steel pipe are also called carbon steel pipes. General carbon steel pipes are made of carbon steel or low alloy structural steels such as 16Mn and 5MnV or alloy steels such as 40Cr, 30CrMnSi, 45Mn2, and 40MnB. 　　2.Erosion performance: Because stainless steel pipe contains chromium and nickel elements, these two elements react chemically with oxygen in the air to form an oxide film, thereby protecting the tube from corrosion, so the stainless steel tube has good corrosion resistance. . Carbon steel pipe is very easy to rust. 　　3, Stainless steel pipe surface can be a variety of processing, can be made into a mirror, shiny surface, drawing surface, etc., so the stainless steel tube is generally used for decorative tubes, props, tube products, but carbon steel is mainly used in the industry. 　　4, The price of stainl...

　　 Carbon steel pipe usually lose their load-carrying capacity at temperatures of 450-650°C, causing large deformations, resulting in bending of steel columns and steel beams. As a result, they cannot be used due to excessive deformation, and generally do not protect the carbon steel pipe. The fire resistance limit is about 15 minutes. The length of this time is also related to the speed of the heat absorption of the components. The following describes the different types of carbon steel pipe fire protection measures. 　　1, Outsourcing. The outer cladding is added to the surface of the carbon steel pipe. It can be cast in-situ or sprayed. Cast-in-place solid concrete cladding is usually reinforced with wire mesh or steel bars to limit shrinkage cracks and ensure the strength of the shell. The spraying method can apply a sand pump to the surface of the carbon steel pipe at the construction site to form a protective layer. The sand pump can be lime cement or gypsum mortar can also be i...

　　Thick-walled carbon steel pipe processing performance is as follows: 　　1: Thick-walled carbon steel pipe castability (castability): Refers to the ability of a metal material to obtain acceptable castings by casting. Castability mainly includes fluidity, shrinkage and segregation. Liquidity refers to the ability of liquid metal to fill molds. Shrinkage refers to the degree of volume shrinkage when a casting solidifies. Segregation refers to the inhomogeneity of chemical composition and organization within a metal due to successive differences in the crystal during cooling and solidification. . 　　2: Thick-walled carbon steel pipe forgeability: Refers to the ability of a metal material to change shape without cracking during pressure processing. It includes hammer forging, rolling, drawing, extrusion, etc. in hot or cold state. The malleability is mainly related to the chemical composition of the metal material. 　　3: Thick-walled carbon steel pipe Machinability (machinability, ma...

　　1.The board used to making LSAW steel pipe , steel plate into the production line after the first full plate ultrasonic inspection; 　　2. The edge milling: through the two edges of the steel plate edge milling machine double-sided milling, make it meet the requirements of plate, plate edge parallelism and groove shape; 　　3. The bending edge: the use of bending machine for plate bending, make the edge of curvature; 　　4. Molding: on the JCO forming machine bending of the plate after half after many step punching, pressure into a "J" shape, and the other half of the steel plate bending, same pressure into a "C" shape, eventually forming the opening "O" shape 5. Early welding: the forming of lsaw mild steel pipe joint with gas protection welding and continuous welding (MAG); 　　6. The welding: the columns more wire submerged arc welding wire (up to 4) in the lsaw steel pipe inside; 　　7. The welding: adopting many wire submerged arc welding of columns...

　　Stainless steel seamless tube of metal and oxygen in the atmosphere to react, in the appearance will form an oxide film. However, the oxidation of the iron oxide formed on the ordinary carbon steel pipe continuously causes the corrosion to be enlarged, and as a result, the pores are formed. This good stainless steel seamless tube is damaged, we can use paint or oxidation-resistant metal such as zinc, nickel and chromium plating to cover the appearance of carbon steel, but, as we expected, this maintenance only is a layer of maintenance film, if the maintenance layer is damaged, the steel will begin to be corrosion. The corrosion resistance of stainless steel depends on the chromium, chromium is a part of steel composition, chrome on steel combined treatment, will change the appearance of the oxide type similar to pure chromium metal surface oxide. This tightly adhered chromium-rich oxide maintains the appearance and avoids further oxidation. 　　Heat treatment process includes heat...

　　When purchasing steel pipe fittings, it’s important to take into consideration certain factors, most importantly size and shape, to ensure that it is a perfect match for your specific purpose. However, another important aspect to consider is the material used in the making of the pipe fitters. Certain elements added to the steel, such as carbon and chrome, can dramatically affect its strength and appearance. Here are a few great reasons to invest in carbon steel pipe fittings as well as chrome plating. 　 　Durability 　　Steel is one of the most popular types of pipe fittings and has been used for construction of pipes and pipe fittings for years because of its durability and strength. However, carbon steel, or plain-carbon steel, has the ability become much stronger through heat treatment. The more carbon added to the steel, the stronger it can become, which is why it is considered one of the strongest types of steel. Another way to increase the durability is to create a harder su...

　　Solid CRA lined pipes or CRA clad (cladding) pipes are known to be corrosion-resistant that consists of an inner pipe which is also corrosion-resistant and a carbon steel outer pipe which can withstand external and internal pressure. There are various applications of pipes made from CRA material and include subsea pipelines for conveying sour gas and oil, saltwater pipelines, water reinjection systems, process pipes in the chemical industry, salt water pipes and much more. 　　These CRA lined and clad steel pipes are majorly used as: water injection pipelines, interfield pipelines, riser pipelines, flow-lines 　　In bonding the CRA material to carbon steel pipe, there are two methods: 　　1.Metallurgical bond (for CRA Clad (caldding) pipes) – Cladding of plates (metallurgical bond between 2 different metals) is carried out by various operations such as coextrusion, hot rolling, explosive bonding or weld overlay. The major problem with metallurgical bonding is the high costs which is...

　　There are lots of engineering projects which are in high temperature and pressure. Under this situation, multiple customers would tell the supplier that they would consider the seamless steel pipe first. However, even for this category, we can still have different materials. 　　So, we can have a deep discussion for it together today. 　　High temperature carbon steel pipe: ASTM A179, A210 steel pipe’s specification covers carbon steel seamless pipe for high-temperature service. So they can work in heat exchangers, condensers. More lists would be shown in website. 　　High temperature alloy steel pipe: ASTM A213, A209 steel pipe’s specification covers alloy steel seamless pipe for high temperature service. This alloy steel pipe would be suitable for bending and similar forming operations. 　　High temperature stainless steel pipe: High temperature stainless steel tubing would keep their mechanical properties when exposed to elevated temperatures on either a short- or long-term basis....

　　The low carbon steel pipe with ceramic is composed of ceramic and metal composite pipes. Ceramic tube combines high hardness, good chemical inertness and steel advantages. It has excellent wear resistance, corrosion resistance, heat resistance and thermal shock resistance. Power plant coal powder, ash, slag, tailings, backfilling, coal, concentrator, coke plant coke particles, the sintering plant material transport life is 15 times higher than the ordinary steel pipe resistance to mechanical impact performance, can also be used for liquid aluminum, corrosive medium transport. 　　The performance of ceramic low carbon steel pipe: 　　1, wear resistance: the ceramic content of the inner lining Al2O3 ceramic composite pipe is more than 90%, the microhardness is HV1000-1800, it has very high wear resistance, its wear resistance is more than ten times better than the quenched carbon steel, better than the tungsten carbide bit. 　　2, corrosion resistant ceramics is a neutral material, wit...

　　ERW carbon steel pipe welding advantages: 　　The resistance welding of ERW carbon steel pipe is a way of connecting the workpiece by welding between two electrodes, and applying the current, the application of the current through the thermal resistance produced by the surface of the workpiece and adjacent areas to heat it into the form of molten or plastic, so that the metal is connected. 　　Advantages of ERW carbon steel tube 　　1, the heating time is short and the heat concentration is concentrated, so the heating area is small, the deformation and stress are small, and the mortals do not have to adjust after welding and heat treatment. 　　2, gold bullion has been surrounded by plastic rings, and molten metal and air are blocked. Metallurgical process is simple. 　　3, there is no need to solder wire, electrode and other filler metals, and oxygen, acetylene, hydrogen and other welding materials, welding costs are low. 　　4, resistance welding has high output, no noise and harm...