• carbon steel pipe cutting, seamless pipe

    How to Cut Carbon Steel Pipe?

    There are many ways to cut carbon steel pipes (cs pipe) , such as oxyacetylene gas cutting, air plasma cutting, laser cutting, wire cutting, etc., can cut carbon steel. There are four common cutting methods: (1) Flame cutting method: This cutting method has the lowest operating cost, but consumes more fluid seamless pipes and the cutting quality is poor. Therefore, manual flame cutting is often used as an auxiliary cutting method. However, due to the improvement of flame cutting technology, some factories have adopted multi-head flame cutting machine automatic cutting as the main method for cutting fluid carbon steel seamless pipes. (2) Shearing method: This method has high production efficiency and low cutting cost. Medium-carbon seamless pipes and low-carbon alloy structural steel pipes are mainly cut by shearing. In order to improve the shearing efficiency, a large-tonnage shearing machine is used for double shearing; in order to reduce the flattening degree of the end of the steel pipe during cutting, the cutting edge generally adopts a shaped blade. For seamless steel pipes that are prone to shear cracks, the steel pipes are preheated to 300°C during shearing. (3) Fracture method: the equipment used is a fracture press. The breaking process is to use a cutting torch to cut all the holes at the predetermined breaking liquid pipe, then put it into a breaking press, and use a triangular ax to break it. The distance between the two points is 1-4 times the diameter Dp of the tube blank. (4) Sawing method: This cutting method has the best cutting quality and is widely used in alloy steel pipes, high-pressure steel pipes, and fluid seamless pipes , especially for cutting large-diameter fluid seamless steel pipes and high-alloy steel pipes. Sawing devices include bow saws, band saws and circular saws. Cold circular saws with high-speed steel sector blades are used for cold sawing alloy steel pipes; cold circular saws with carbide blades are used for high-alloy steel saws. Precautions for carbon steel pipe cutting: (1) Galvanized steel pipes and carbon steel pipes with a nominal diameter less than or equal to 50mm are generally suitable for cutting with a pipe cutter; (2) High-pressure pipes and pipes with a tendency to harden should be cut by mechanical methods such as sawing machines and lathes. If oxyacetylene flame or ion cutting is used, the affected area of the cutting surface must be removed, and its thickness is generally not less than 0.5mm; (3) Stainless steel pipes should be cut by mechanical or plasma methods; Other steel pipes can be cut with oxyacetylene flame.
  • seamless pipe, advantages and disadvantages

    Advantages and Disadvantages of Seamless Pipe

    CS seamless pipe is a long steel pipe with hollow section and no joints around it; it is widely used in oil transportation, natural gas, gas, water and the transportation of certain solid materials. Compared with other steel pipes, the cs seamless pipe has a strong advantage in bending resistance; and the weight of the cs seamless pipe is relatively light, which is a very economical section steel. Advantages of seamless steel pipes: 1. The seamless steel pipe is light in weight, only 1/5 of the square steel , so it has good light weight performance. 2. Corrosion resistance of seamless steel pipes: acid, alkali, salt and atmospheric environment, corrosion resistance, high temperature resistance, impact resistance, fatigue resistance, no need for regular maintenance, and a service life of more than 15 years; 3. The tensile strength of seamless steel pipe is 8-10 times higher than that of ordinary steel, and its elastic modulus is better than that of steel, with excellent creep resistance, corrosion resistance and impact resistance; 4. Seamless steel pipe has excellent mechanical properties and easy processing; 5. The seamless steel pipe has high elasticity, is used for mechanical equipment, has no memory, no deformation, and anti-static. Disadvantages of seamless steel pipes: 1. We must know that the wall thickness of high-quality seamless steel will be particularly thick, because the thicker the wall thickness of the product, the more economical and practical it is. If the wall thickness is thinner, its processing cost will increase greatly. The presence of resources increases resource costs. 2. The seamless steel process also determines its limitations. Ordinary seamless steel has low precision, uneven wall thickness, low brightness inside and outside the tube, high cost of fixed length, pitting and black spots inside and outside. Removal is not easy; 3. Its detection and shaping must be processed offline. Therefore, it embodies its superiority in high-pressure, high-strength, mechanical structural materials.
  • seamless carbon steel pipe, performance advantages, seamless pipe

    Performance Advantages of Seamless Carbon Steel Pipe

    Seamless carbon steel pipe is a steel pipe made of a single piece of metal with no joints on the surface. It is made of a steel ingot or a solid tube blank through perforation to form a capillary tube, and then hot-rolled, cold-rolled or cold-drawn. The characteristics of seamless steel pipes are different from other steel pipes. They are strong in corrosion resistance, strong and durable, suitable for different purposes, and have strong applicability in the construction process. They are not restricted by natural conditions during the installation process. The details are as follows: 1. Excellent wear resistance The thickness of the wear-resistant layer of the seamless pipe is 3-12mm, and the hardness of the wear-resistant layer can reach HRC58-62. The grinding performance is more than 2-5 times, and the wear resistance is much higher than that of spray welding and thermal spraying. 2. Excellent impact performance The seamless steel pipe is a double-layer metal structure. The wear-resistant layer and the base material are metallurgically bonded. The bonding strength is high. It can absorb energy during the impact process. The wear-resistant layer will not fall off and can be used in vibration and impact Under strong working conditions, this is beyond the reach of cast wear-resistant materials and ceramic materials. 3. Excellent temperature resistance The seamless steel pipe alloy carbide has strong stability at high temperature, and the wear-resistant steel plate can be used within 500°C.The temperature of other special requirements can be customized and produced, which can meet the use under the condition of 1200°C; the wear-resistant materials such as ceramics, polyurethane, and molecular materials cannot meet such high temperature requirements by pasting. 4. Excellent connection performance The base material of the seamless steel pipe is a general Q235 steel plate, which ensures that the wear-resistant steel plate has resistance and plasticity. It provides strength against external force, and can be connected with other structures by welding, plug welding, bolt connection and other methods. The connection is firm and not easy to fall off. There are more connection methods than other materials. 5. Excellent processing performance Seamless steel pipes can be processed into different standard sizes according to requirements, and can be processed, cold-formed, welded, bent, etc., which are convenient to use; they can be tailor-welded on site, making repair and replacement work time-saving and convenient, and greatly reducing work intensity. 6. High cost performance The price of seamless steel pipe is slightly higher than that of general steel, but considering the service life of the product, as well as repair costs, spare parts costs, etc., its performance-price ratio is much higher than that of general steel plates and other steel products. Go here to learn more about "  Mechanical Properties of Seamless Steel Tubes "
  • seamless carbon steel pipe, yield strength

    Factors Affecting the Yield Strength of Seamless Carbon Steel Pipe

    Yield strength is an important concept in the field of seamless carbon steel pipe mechanics. It is the stress value of seamless steel pipe when the ductile material yields. When the seamless steel pipe will deform under the action of force, the deformation at this time can be divided into two ways: plastic deformation and elastic deformation.      1. Plastic deformation will not disappear when the external force disappears, and the seamless steel pipe will undergo permanent deformation. 2. Elastic deformation means that under the condition of external force, when the external force disappears, the deformation will also disappear.      The yield strength is also the stress value of the seamless carbon steel pipe when it begins to undergo plastic deformation, but because the brittle material does not undergo obvious plastic deformation when it is stretched by an external force, only the ductile material has the yield strength.    Here, the yield strength of seamless carbon steel pipe we refer to is the yield limit when yielding occurs, and the stress against micro-plastic deformation. When the force is greater than this limit, the part will permanently fail and cannot be recovered. The external factors affecting the yield strength of seamless carbon steel pipes are: temperature, strain rate, and stress state. As the temperature decreases and the strain rate increases, the yield strength of the seamless steel pipe also increases, especially when the body-centered cubic metal is sensitive to temperature and strain rate, which will cause low-temperature embrittlement of the steel. The influence on the stress state is also very important. Although the yield strength is an essential index reflecting the intrinsic performance of the manufactured material, the yield strength is different due to different stress states.      Intrinsic factors affecting yield strength are: bond, organization, structure, and atomic nature. If we compare the yield strength of seamless carbon steel pipe metal with ceramics and polymer materials, we can see from it that the influence of bonding bonds is a fundamental problem. Go here to learn more about " Mechanical Properties of Seamless Steel Tubes "
  • spiral steel pipe, seamless steel pipe

    Differences between Spiral Steel Pipe and Seamless Steel Pipe

    Spiral steel pipes (SSAW) and seamless steel pipes (SMLS) are relatively common pipes in life, and they are used in house decoration and construction. So what is the difference between spiral steel pipes and seamless steel pipes? Then let's find out about it. What is a spiral steel pipe? Spiral steel pipe (SSAW) is a spiral seam steel pipe made of strip steel coil as raw material, extruded at regular temperature, and welded by automatic double-wire double-sided submerged arc welding process. The spiral steel pipe sends the strip steel into the welded pipe unit, and after rolling by multiple rollers, the strip steel is gradually rolled up to form a round tube billet with an opening gap. Adjust the reduction of the extrusion roller to control the weld gap at 1~ 3mm, and make both ends of the welding port flush. The appearance of the spiral pipe has spiral welding ribs, which is caused by its processing technology. What is seamless steel pipe? Seamless steel pipe (SMLS) is a long strip of steel with a hollow section and no seams around it. It is made of steel ingot or solid tube blank by perforation, and then made by hot rolling, cold rolling or cold drawing. A large number of pipelines are used to transport fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials. The difference between spiral steel pipe and seamless steel pipe: 1. Different production methods The seamless steel pipe is made by heating and piercing the tube blank. It has no seams, and the material needs to be determined according to the requirements. The spiral steel pipe is made by heating and rotating the strip steel once, and the material needs to be changed according to the demand. It solves the problem that the seamless large-diameter pipe is not easy to manufacture. 2. Different fields of application Seamless steel pipes are normally used in high temperature and high pressure fluids, while spiral steel pipes are usually used in fluids below 30 kg, and those with large diameters are used in medium and low pressure fluids. the Seamless pipes are used in different parts according to different production standards, and are mainly used in industry. Spiral pipes are mainly used in low-pressure water delivery, heat and piling pipes, etc. 3. Different prices Compared with seamless pipes, the price of spiral pipes is more economical. Spiral pipes and seamless pipes are different in terms of processing technology, outer surface and usage. Both have their own advantages and disadvantages. You can't blindly save costs without considering the actual use situation. You should choose the best according to your actual situation.
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