Seamless steel pipes are hollow tubes made from solid billets of steel. They offer greater strength and durability over welded pipes composed of multiple pieces. Seamless pipes have much higher pressure ratings than welded versions, making them ideal for high-pressure applications such as natural gas transmission lines or industrial machinery operations. Additionally, they allow for different surface finishes, diameters and wall thicknesses to meet the varying needs of different industries and customers. In short, seamless steel pipe is stronger, more durable and more versatile than its welded counterpart!
The steel used for Carbon Steel Pipe are steel sheets or strips, which are divided into furnace welded pipes, electric welded (resistance welded) pipes and automatic arc welded pipes due to their different welding processes.
Stainless Rectangle Pipe is a kind of hollow long round steel, which is widely used in industrial transmission pipelines and mechanical structural components such as petroleum.
GI Rectangular Tube's surface is hot-dip plated or galvanized layer welded steel pipe. Hot-dip galvanized Tube can increase the corrosion resistance of steel pipes and prolong the service life.
Galvanized Round Pipe is a welded steel pipe with a hot-dip or electro-galvanized layer on the surface. Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life.
We supply high-quality Seamless Steel Pipe, carbon steel pipe,alloy steel pipe and so on. It keeps a large number of stocks all year round with complete types and specifications.
Strength and Durability
Seamless steel pipes are renowned for their superior strength and durability. The absence of welds orjoints eliminates weak points in the pipe structure, ensuring enhanced resistance to pressure, impact, andexternal forces. This makes seamless steel pipes suitable for applications that require high-performancepipes capable of withstanding extreme conditions and heavy loads.
Uniformity and Homogeneity
The seamless manufacturing process of these pipes ensures a uniform and homogeneous structurethroughout the pipe length. This uniformity leads to consistent mechanical properties, including tensilestrength, yield strength, and elongation, ensuring predictable and reliable performance. Additionally, thelack of welded seams eliminates the risk of defects or inconsistencies that can compromise the structuralintegrity of the pipe.
Corrosion Resistance
Seamless steel pipes can be manufactured with various corrosion-resistant coatings or alloy compositionsto withstand corrosive environments. This makes them ideal for applications in industries such as oil andgas, petrochemicals, and marine environments where exposure to corrosive substances is common. Theseamless nature of the pipes provides an additional layer of protection against corrosion, ensuring long-lasting performance and minimizing maintenance costs.
Seamless Flow
The absence of welds or joints in seamless steel pipes allows for smooth and uninterrupted flow of fluids,gases, or solids. The seamless design eliminates the risk of turbulence, restrictions, or blockages commonlyassociated with welded pipes. This feature is particularly important in industries such as oil and gas, whereefficient and uninterrupted flow is essential for optimal performance.
Precision and Dimensional Accuracy
Seamless steel pipes are known for their precise dimensions and tight tolerances. The manufacturingprocess ensures excellent control over the pipe's outer diameter, wall thickness, and length, allowing foreasy installation, compatibility with various systems, and proper ftting. This precision and dimensionalaccuracy reduce the need for additional machining or adjustments, saving time and costs duringinstallation.
Why Choose Us
Strong Production Capacity
Tangshan Xunzhuo International Trade Co., Ltd. is a steel group company integrating the steel industry and international trade. We have 7 production lines, more than 500 employees, and a monthly production capacity of 100,000 tons, completing orders for customers efficiently and timely.
Complete Range of Products
The company's main products include galvanized steel coils, galvalume steel coils, color-coated steel coils, corrugated steel roof panels, cold-rolled hard steel, aluminum color-coated coils, tinplate, TFS and other plates as well as angle steel, channel steel, H-shaped steel, Wire rod, rebar/rebar, steel pipe, steel strip, etc.
Strict Quality Inspection
Professional technical quality inspection personnel conduct quality inspections on the products ordered by customers. From production, packaging to transportation, they carefully conduct quality tracking throughout the entire process to ensure that customers receive satisfactory products.
Professional Service
We have a professional service team and a complete sales process. All personnel in each position of the company have more than many years of foreign work experience. The overall team has professional knowledge, contract performance capabilities and risk resistance capabilities to provide customers with professional and high-quality services.
Types Ofwhat Are The Common Categories Of Seamless Steel Pipes
Hot rolled seamless steel pipe
Hot-rolled seamless steel pipe is a seamless steel pipe made by heating the blank to a sufficient temperature through a hot-rolling process, and then passing it through multiple continuous passes. Its advantages are high production efficiency and smooth surface. It is usually used to transport high-temperature and high-pressure gas or liquid.
Cold drawn seamless steel pipe
Cold drawn seamless steel pipe is processed from steel pipe blank into seamless steel pipe through cold drawing process. Compared with hot-rolled seamless steel pipes, cold-drawn seamless steel pipes have higher surface smoothness and higher dimensional accuracy, and are suitable for manufacturing various precision mechanical parts and refrigeration equipment.
Precision seamless steel pipe
Precision seamless steel pipes are produced through cold drawing processes, which require higher dimensional accuracy and surface smoothness. They are used to manufacture high-precision equipment such as hydraulic systems, aerospace vehicles, and nuclear power plants.
Alloy seamless steel pipe
Alloy seamless steel pipe is a steel pipe with high temperature, high pressure, high strength and high corrosion resistance. It is widely used in petrochemical, electric power, nuclear industry and other fields. According to their alloy composition, they can be divided into different types, such as chromium-molybdenum alloy steel pipes, nickel alloy steel pipes, etc.
Stainless steel seamless steel pipe
Stainless steel seamless pipe is a steel pipe with strong corrosion resistance and is widely used in petrochemical, pharmaceutical, food and other fields. According to their different compositions and uses, stainless steel seamless steel pipes can be divided into different varieties, such as austenitic stainless steel pipes, ferritic stainless steel pipes, etc.
What Are the Materials of Seamless Steel Pipe
Seamless steel pipe is an important material widely used in petroleum, chemical, energy, construction and other fields. The manufacturing process of seamless steel pipe is complex, and it needs to go through multiple processes such as hot rolling, cold drawing, and cold rolling, which gives it superior properties such as high strength, corrosion resistance, and high temperature resistance. However, due to the wide variety of application environments, the material of seamless steel pipes is also diverse. So what kinds of seamless steel pipe materials.
Carbon steel seamless steel pipe is the most common one on the market, the main components of carbon steel are iron, carbon and a small amount of silicon, manganese and other elements. According to the different carbon content, carbon steel can be divided into low carbon steel, medium carbon steel and high carbon steel. Low carbon steel has good toughness and ductility, and is often used to make various daily objects, such as pipelines and building structures. Medium carbon steel is widely used in the manufacture of mechanical parts because of its high hardness and strength. High carbon steel because of its high hardness, more used in the production of tools, molds and other high requirements of equipment.
Alloy steel seamless steel pipe is based on carbon steel, by adding various alloying elements (such as chromium, nickel, molybdenum) to improve the performance of steel. According to the different added elements and content, alloy steel can be divided into low alloy steel and high alloy steel. In general, the addition of alloying elements can improve the strength, hardness, corrosion and oxidation resistance of steel, and have wider applicability.
Stainless steel seamless steel pipe by adding chromium, nickel and other elements in the steel, so that it has excellent rust and corrosion resistance.
Stainless steel has a high nickel chromium content, which makes it perform well in almost all environments. According to the different composition of stainless steel, stainless steel seamless steel pipes can be divided into 200 series, 300 series and 400 series.
In addition to the above common materials, there are some special purpose seamless steel pipes on the market, which are called special steel. Special steel is generally produced according to the needs of specific industries through special smelting technology and heat treatment process, and its performance is extremely specialized. Some special steels even introduce rare metals such as titanium, tungsten, molybdenum, etc. into the production process to meet specific environmental needs.
The Common Application Areas of the Seamless Steel Pipes Are
Fertilizer industry
Steel seamless pipes come in handy in several sectors of the fertilizer industry. The regions of application of the lines in the fertilizer industry mainly include piping system equipment, high-pressure tubes in Melamine plants, and heat exchanging systems in Urea synthesis ethylene plants. Other than the above mentioned areas, seamless steel pipes are also used in a variety of sectors in the industry.
Power Generation Industry and Environmental Technologies
Steel seamless pipes and tubes are used primarily as heat exchangers in giant power plants and the energy department. Environmental uses and waste incineration plants also utilize the same application style known as reheater superheaters.
Chemical and Petrochemical Industries
Steel seamless plants prove highly useful in chemical and petrochemical industries. The area of application in the chemical and petrochemical sectors mainly includes the following: High-pressure pipes in Melamine plants, elaborate piping systems and heat exchanging systems of urea synthesis ethylene plants.
Curate Ship-building Parts for International Clients
Various processes of ship-building require the use of steel seamless pipes and tubes. While it is difficult to export a readymade ship, it is comparatively easier to export parts that will be used to build the ship. As per the request of international dealers, a variety of steel seamless pipes are exported to distant lands. These tubes are then used in the manufacturing process of shipbuilding.
Oil and gas Industries
Steel seamless pipes are a common requirement for oil casing and tubing for offshore and onshore Oil & Gas transfer. The oil extracted offshore needs large tubes to be transferred from one reservoir to another. Not all materials can support unprocessed raw oil. Steel seamless pipes are a perfect application for such purposes.
Engineering and Construction Industry
Steel seamless pipes are highly used in engineering and construction industries in the following sectors: automobile designing technology, food manufacturing industry, measurement and control technology, hydraulic press, cylinders and pumps, etc. Stainless Steel Seamless pipes are used as a half-finished product in the departments mentioned above. They are used as fittings and tubes installed in big machines or as a half-finished product for machined parts.
Automotive Industry
In the automotive sector, DMV items are explicitly used in the following areas: Other than these, they are also used in hydraulic braking systems.
The Difference Between Spiral Steel Pipe and Seamless Steel Pipe
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.
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.
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.
Construction preparation
Operating conditions: The pipeline ditch surface is completed; the pipeline well is bricked.
Material requirements: Complete pipelines of various specifications and models.
Main machines and tools: Cutting machine, electric welding machine, polishing machine, electric hammer, etc.
Quality requirements
The allowable deviation per meter for the vertical installation of the riser is 3mm, and the allowable deviation is not more than 8mm for more than 5m. The allowable deviation per meter for horizontally installed pipes is 1mm.
Pipeline installation
Production and installation of pipe support:
According to the design of the drawings, the pipeline is positioned, and the pipeline supports are prefabricated according to the site conditions. Hang the wire down from the 25th floor, and then fix the bracket.
Pipeline installation:
Cut the material according to the design and on-site, and then use a grinder to bevel the groove, and the bevel angle is 60°~65°. Fix the processed pipe on the bracket, the gap between the two pipes is 1.5mm~2.5mm, and then weld.
There should be no bends at the welding joints, and the joints should not be misaligned during assembly. The electric welding position is generally 4 spot welding. After checking and straightening, use the free conversion method to weld as much as possible.
Quality requirements
No branch pipe shall be welded at the weld, and no weld at the bend;
The welding joint is straight and full, and the surface of the welding joint has no defects such as burn-through, cracks, obvious nodules, slag inclusions and pores.
The welding wave is uniform, and the misalignment deviation of the pipe's counterpart should not exceed 20% of the pipe wall thickness and not exceed 2mm.
Safety precautions
The shell of the electric welding machine must be well grounded, and the welding tongs and the welding handle must be well insulated.
Wear protective gear when using the welding machine.
Maintenance Method of Seamless Steel Pipe
Anti-rust treatment
Seamless steel pipes are susceptible to oxidation, corrosion and other factors during production, transportation and storage, so they must be treated with anti-rust. Common anti-rust methods include spraying anti-rust paint, coating anti-rust oil, surface galvanizing, etc. When choosing an anti-rust method, it should be selected according to the application environment and service life of the seamless steel pipe.
Regular inspection
In order to ensure the quality and service life of seamless steel pipes, they need to be inspected regularly. The inspection content includes appearance, size, physical properties, etc. If deformation, cracking, corrosion, cracks, etc. are found in seamless steel pipes, they should be repaired or replaced in time.
Storage environment
During the storage of seamless steel pipes, attention should be paid to environmental hygiene, ventilation, dryness and other factors. First, the storage environment should be kept dry to avoid long-term exposure of seamless steel pipes to humid environments; Second, pay attention to ventilation to avoid seamless steel pipes being piled together and unable to ventilate; Finally, the storage area should be kept hygienic to avoid contamination of seamless steel pipes by debris, dust, etc.
Avoid collision and friction
Seamless steel pipes are easily affected by collision and friction during transportation and loading and unloading, so collision and friction need to be avoided. During transportation and loading and unloading, pay attention to the use of appropriate equipment and tools to prevent friction and collision between seamless steel pipes and other items.
Regular cleaning and lubrication
Seamless steel pipes are easily affected by dirt during use, so they need to be cleaned regularly. At the same time, pay attention to lubricating seamless steel pipes to avoid affecting their service life due to friction.
Storage and use precautions
During the storage and use of seamless steel pipes, the following matters need to be noted: First, do not expose seamless steel pipes to the sun for a long time; Second, do not let seamless steel pipes be affected by deformation forces such as extrusion and bending; Finally, do not expose seamless steel pipes to corrosive substances such as oil, acid, and alkali to avoid affecting the performance and life of seamless steel pipes.
Our Factory
Langzo Steel is located in the Chinese steel base-Boxing city, Shandong Province, China which is a steel group company integrating steel industry and international trade, our subsidiaries are: Shandong Langzo New Materials Co., Ltd.; Vanten Metal Corporation Limited and Tangshan Jingjin ColdRolled Galvanizing Co.. Ltd.etc.Our production capacity is about 100000 tons per month with 7 production lines.
FAQ
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