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Shandong Dorco Heavy Machinery Co., LTD.
26/03/2024
Spiral steel pipes (SSAW Pipe) and straight seam steel pipes are currently widely used in water pipelines, construction and other industries, but there is a big difference between the two.
1. Different pressure-bearing capacity
The strength of spiral steel pipes is generally higher than that of straight seam steel pipes. The main production process is submerged arc welding. Spiral steel pipes can use blanks of the same width to produce steel pipes with different pipe diameters, and can also use narrower blanks to produce steel pipes with larger pipe diameters.
2. Different specifications
The specifications of spiral steel pipes are generally above 219mm, and most of them are of large diameter. The specifications of straight seam steel pipes are mostly of small diameter, but some manufacturers also have many large diameters.
3. Different prices
Spiral steel pipes are mostly settled by measuring rulers, and the price of straight seam steel pipes is mostly settled by weighing, but the price of spiral steel pipe is about 300 yuan/ton cheaper than that of straight seam steel pipe.
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Web：www.sddorco.com
20/03/2024
What is the meaning of ERW?
Electric resistance welded (ERW) pipe is made from steel coil and the weld seam runs parallel to the pipe. The width of the coil is the same as the circumference of the pipe so diameters are limited to 24 inches.
WhatsApp：+86-13515323812
Email：[email protected]
Web：www.sddorco.com
19/03/2024
What is the ERW Process？
Electric resistance welding (ERW) is a welding process in which metal parts in contact are permanently joined by heating them with an electric current, melting the metal at the joint. Electric resistance welding is widely used, for example, in the manufacture of steel pipes and the assembly of bodies for automobiles.
Why Choose Horizontal Ring Rolling Machine?
● Dual screen display of working status， The new console has a wide view
● The operation is simple and convenient, and the entire rolling process can be completed with just one electronic handwheel, achieving multi-functional and multi-station rolling.
● Input the dimensions of the ring and blank, automatically generate the rolling curve, and automatically match the radial and axial rolling based on the rolling curve.
Equipment related to Ring Rolling Machine
Raw material heating furnace
hydraulic press
Learn More:www.sddorco.com
06/03/2024
What are the difference between SSAW and LSAW Pipe ?
Spiral steel pipes (SSAW Pipe) and straight seam steel pipes are currently widely used in water pipelines, construction and other industries, but there is a big difference between the two.
1. Different pressure-bearing capacity
The strength of spiral steel pipes is generally higher than that of straight seam steel pipes. The main production process is submerged arc welding. Spiral steel pipes can use blanks of the same width to produce steel pipes with different pipe diameters, and can also use narrower blanks to produce steel pipes with larger pipe diameters.
2. Different specifications
The specifications of spiral steel pipes are generally above 219mm, and most of them are of large diameter. The specifications of straight seam steel pipes are mostly of small diameter, but some manufacturers also have many large diameters.
3. Different prices
Spiral steel pipes are mostly settled by measuring rulers, and the price of straight seam steel pipes is mostly settled by weighing, but the price of spiral steel pipe is about 300 yuan/ton cheaper than that of straight seam steel pipe.
Learn More:www.sddorco.com
29/02/2024
What are the application areas of spiral steel pipes?
Spiral steel pipe is a type of steel commonly used in industries such as industry and construction. It is a spiral seam steel pipe made from strip steel coil as raw material, often formed by warm extrusion, and welded by automatic double wire double-sided submerged arc welding process. Mainly used in water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, and urban construction.
Manufacturing of large diameter pipes:https://www.sddorco.com
The production of large-diameter steel water pipes is performed according to the AWWA C200 standard (American Water Works Association, 2017b). They are manufactured primarily with the spiral-welded pipe method,.The spiral-weld process is continuous, and the continuous cylinder produced by spiral welding is cut with plasma cutting at specific intervals, depending on the required length. This pipe segment is the primary component of pipe production and is called “pipe joint” or “stick” . Normally, the length of a pipe stick is 50 ft, but quite often, depending on the project requirements, 1/2-joints or 1/4-joints are produced, which are pipe segments with length equal to one-half or one quarter of the original length respectively.
What is Rolled Ring Forging?
Rolled ring forging is a metalworking process that begins with a circular preformed piece of metal that has been upset and pierced to form a doughnut-like shape. The temperature of the doughnut shape (torus) is heated to a point above the recrystallization temperature and placed over a mandrel or idler.
The idler moves the pierced doughnut shape toward a drive roller that evenly, continuously, and uniformly rotates to reduce the wall thickness of the torus while increasing its inner and outer diameters. The results of the process are a seamless rolled ring.
Using the rolled ring forging process, the seamless metal rings can have varying sizes and are manufactured for use as parts of machine tools, turbines, pipes, and pressure vessels. Rolled ring forging significantly affects the mechanical properties of the material being shaped while allowing it to maintain its grain structure.
26/02/2024
What is Closed Die Forging?
Closed die forging is sometimes referred to as impression die forging. It is the process that occurs when two or more dies are used together to create complex-shaped parts through hammering or pressing of metal blanks using closed dies.
In closed die forging the hammer is dropped on the workpiece, causing the flow of the metal in the die cavities. This action is responsible for creating the outward appearance or shape of the product. The operation depends on the hammer part and in some cases, it may be dropped several times. This dropping of the hammer can also be done in a series of quick successions and the hammer makes contact with the workpiece for a short time which in most cases is in milliseconds.
As the hammer drops, there is a material that gets squeezed out the die cavities and is referred to as flashing. The flashing has a higher cooling rate as compared to the rest of the material. The flash is removed after the forging process and is usually stronger than the rest of the material. This post-removal of flashing is usually done by machining and finishing operations.
Learn more：https://www.sddorco.com/
20/02/2024
What is Grain Flow?
Grain flow is a commonly used term in open and closed die forging and it refers to the direction of flow in which metal grains will orient themselves and is caused by deformations during the forging process.
What is Flash?
Flashing refers to the unwanted material that was not used to create a part during the forging process. This material usually overlaps and exceeds the required dimensions and is usually removed by machining after completing the forging process. The diagram below shows the flash formed when a force F is applied to the metal billet.
Learn More:www.sddorco.com
18/02/2024
What is an Ingot?
Ingot refers to a metal block made from metals like gold, silver, steel, etc, and is usually in a shape such as a rectangular prism, cube, etc.
08/02/2024
What is Open Die Forging?
Open die forging is also referred to as flat die forging, blacksmith forging, Smith forging, and hand forging. In this forging, a hot forming process is involved where the metal or metal alloy is shaped by pressing or hammering between simple or flat contoured dies. It is the operator’s skill and the equipment type that determines the outcome or forms obtained hence the name blacksmith.
Nowadays, because of the availability of technology and advancement in technology, most open die forging equipment is now computer-controlled enabling the design and creation of complex forging and there is better dimensional control. In most cases, open die forgings are simple shapes like disks, shafts, rings, etc. The open die forging operations are mainly used when the parts involved are few or when the part is too big to be forged in closed dies. The process of open die forging is considered ideal and most appropriate to produce mechanical properties that can not be produced using closed die forging operations.
07/02/2024
What is Forging?
Forging is a process in manufacturing that involves pressing, hammering, or rolling metal objects into various shapes or patterns.
Forged parts come in various shapes and sizes and these products include disks and blanks, hollows, forged rings, semi-closed dies, roller rings, bars, hubs, complex shapes, shafts, rotor shafts, eccentric shafts. The diagram below illustrates the steps of the process of forging.
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LSAW and SSAW employ the same manufacturing technology – JCOE process.
The difference is SSAW pipes are welded in the helix or spiral position while LSAW pipes are welded in the longitudinal direction. Manufacturing process of SSAW pipe is by rolling and welding a steel strip in a way that the pivotal direction is oblique to the axis or pipe center, making the weld seam in a spiral line.
Why Choose DORCO Heavy Machinery ？
With the rapid growth of Dorco Heavy Machinery in domestic and foreign markets, our customer base is also growing. We deeply realize that every user is our rare and precious wealth. For this reason, adhering to the development concept of "integrity and innovation", we continue to improve and perfect after-sales service, hoping that every user can not only purchase reliable and high-performance equipment, but also obtain continuous and high-quality technical support.
▶ 1. Plant foundation design (installation diagram, process flow, equipment layout diagram)
According to the layout of the factory area, help customers to carry out auxiliary planning to ensure a more reasonable layout of the line body and a higher utilization rate of equipment.
▶ 2. Provide configuration list of auxiliary equipment, etc.
Provide partners with equipment configuration details and parameter guidance to ensure subsequent production quality control and equipment adjustment.
▶ 3. On-site installation and personnel training
In order to improve the customer's application level, ensure that the customer fully understands the equipment performance and fully utilizes the potential of the equipment, after the equipment is delivered, the company is responsible for training the customer on use, and putting forward suggestions for use and maintenance to the customer to ensure that the equipment plays a role in the actual production work of the customer. to its proper effect.
If there are any technical problems in the future, remote guidance can be provided. If the customer needs it, technicians can be arranged for on-site guidance.
▶ 4. Assist in providing raw materials and sales data in the Chinese market
Help cooperative customers to obtain better resource advantages and sales channels, and empower the rapid opening of the market.
▶ 5. Logistics and transportation, export declaration materials, etc.
Provide export declaration materials, and cooperate with large domestic logistics companies to formulate a reliable transportation plan to ensure that the equipment is delivered to the customer in good condition;
▶ 6. Experienced after-sale technical support team
In order to ensure the professionalism of the service, the company builds an after-sales technical support team composed of engineers with rich technical experience and solid operation experience to ensure that the scientific research and production work of the majority of users can be carried out smoothly.
Learn More：https://www.sddorco.com/plant-planning.html
Forging is the manufacturing process of hammering, pressing or rolling metal into shape. This is either delivered from a hammer, press or die. It is essentially the art of heating and working hot metal to design or shape that is fit for a specific purpose or use. By working the material, it increases many of its properties, including structure, conductivity and longevity. Forging offers a very useful and diverse medium for many industries with the process being economically sound and achieving specific mechanical properties. Forging is often categorized according to the temperature at which it is performed, cold, warm, or hot forging.
Learn More:https://www.sddorco.com/product/horizontal-ring-rolling-machine.html
31/01/2024
What is spiral steel pipe ?
A spiral steel pipe is a spiral seam steel pipe which is made of steel coiled coil as raw material, which is often heated and extruded, and welded by automatic double wire double-sided submerged arc welding process. The advanced double-sided submerged arc welding process can achieve welding at the best position, and it is not easy to have defects such as wrong side, welding deviation and incomplete pe*******on, and it is easy to control the welding quality. Spiral steel pipe is mainly used in water supply engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, urban construction owing to its sturdy construction with high strength and wear resistance.
Learn More: https://www.sddorco.com/product/spiral-weld-pipe-mill-machine.html
Application of LSAW steel pipes used in the oil and gas pipelines. Especially required large diameter and thick wall pipe with high strength and long-distance. Meanwhile, it needed in construction of a structure that needs tough strengthl. In the water treatment, thermal industry, bridge building, and etc.
According to API specifications, the LSAW pipe designated in many areas. Such as, large-scaled oil and gas transportation. In the cases that pipeline across the city, sea, and the urban area.
As we know, SSAW pipes used for oil and gas pipeline systems. But in petroleum design specification, the SSAW could only applied in many areas. Such as construction structure, water transport and sewage treatment, thermal industry, building, etc.
24/01/2024
● Unmanned Operation：
The D51K fully automatic CNC ring rolling machine is equipped with loading and unloading robotic arms and robots to achieve unmanned operation of the ring rolling machine. It is driven by a servo motor through a reducer to achieve rolling.
● Accurate control：
The D51K fully automatic CNC ring rolling machine can reduce the impact of temperature changes, facilitate accurate control of feed motion, and increase stability.
● PLC monitoring system：
The D51K fully automatic CNC ring rolling machine is mainly composed of PLC, touch screen, servo proportional valve amplifier, counting module, digital to analog conversion module, etc. The PLC serves as the calculation processing core of the entire control system and is responsible for monitoring the entire processing process according to the process parameters set on the touch screen.
Learn more about these projects:
https://www.sddorco.com/type-cnc-vertical-ring-rolling-machine.html
Type CNC Vertical Ring Rolling Machine Shandong Dorco Heavy Machinery Co., LTD.
How does ring rolling work?
The ring rolling process starts with a circular preform of metal that has been previously upset and pierced (using the open die forging process) to form a hollow “doughnut.” This doughnut is heated above the recrystallization temperature and placed over the idler or mandrel roll.
22/01/2024
India customers visit our company!
Ring rolling machine
CNC Ring Rolling Machine
Axial Horizontal Ring Rolling Mill
radial and axial CNC ring rolling machine
Grinding machine
Milling Machine
Forming machine
What are advantages of DRC-D53KT CNC Radial Axial Ring Rolling Machine?
● The digital console is easy to operate
● Two electronic hand wheels can complete the entire rolling process
CNC Ring Rolling Machine and Spiral Welded Pipe Machine Manufacture
Shandong Dorco Heavy Machinery Co., LTD., located in Puji Industrial Park, Jiaozhou, Qingdao, Shandong Province. We are a large-scale heavy industry machinery manufacturing enterprise in China. The company is mainly engaged in the design, manufacturing, and installation of large-scale equipment such as heavy industry machinery, ring rolling machines, steel spiral welded pipe machines, mining machinery, etc. Its products cover multiple series such as self unloading, construction, sanitation, logistics, mining machinery, as well as key assembly components..
10/01/2024
Shandong Duoleke Heavy Industry Machinery Co., Ltd. is located in Puji Industrial Park, Jiaozhou City, Shandong Province, and is a large-scale heavy industry machinery manufacturing enterprise in China. The company mainly engages in the design, manufacturing, and installation of large-scale equipment such as heavy industry machinery, ring rolling machines, spiral welded pipe machines, and mining machinery. Its products cover multiple series such as self dumping, construction, environmental sanitation, logistics, and mining machinery, as well as key assembly components.
Shandong Dorco Heavy Machinery Co., LTD. Shandong Dorco Heavy Machinery Co., LTD.
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