Analysis of the structure of the induction coil of the used pipe welded machine
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- Release time:2023-03-23 11:30
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【概要描述】In the used pipe welded machine, the structure of the induction coil has three types: integral single-turn,integral multi-turn and split single-turn. The following is an overview of single-turn induction coils and multi-turn induction coils.
Analysis of the structure of the induction coil of the used pipe welded machine
【概要描述】In the used pipe welded machine, the structure of the induction coil has three types: integral single-turn,integral multi-turn and split single-turn. The following is an overview of single-turn induction coils and multi-turn induction coils.
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- Release time:2023-03-23 11:30
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In the used pipe welded machine, the structure of the induction coil has three types: integral single-turn,integral multi-turn and split single-turn. The following is an overview of single-turn induction coils and multi-turn induction coils.
The single-turn induction coil is mostly rolled with a single-layer copper plate with a thickness of 1.5~2mm, which is directly watered and cooled when used; it is also made of a double-layer copper plate with cooling water inside. Obviously, the cooling effect of the double layer is better than that of the single layer. It is better, but it is more troublesome to make. From the point of view of delivering welding energy, there is no difference between them. In practice, the double layer is used less.
The multi-turn induction coil is usually made of hollow round copper tube, which is connected with the cooling water of the unit to achieve simultaneous cooling inside and outside the induction coil. The main parameters of the induction coil include width, number of turns and inner diameter.
Generally, the adjustment of the induction coil of the used pipe welded machine is adjusted from the width of the induction coil, the number of turns of the induction coil, the inner diameter of the induction coil, and the protection of the induction coil.
Induction coil width
The width of the single-turn induction coil should be selected according to the pipe diameter, see Table 1. The overall single-turn induction coil is more suitable for small welded pipe units below 32; the split single-turn induction coil is more suitable for large and medium-sized welded pipe units. For example, if the induction coil is unfortunately damaged and needs to be replaced, the trouble and cost are not the induction coil itself, but the time cost of cutting off the tube and the resulting time cost; the split induction coil can be used without cutting the tube. Quick and cost-effective replacement.
The influence of the width of the induction coil on the output efficiency is as follows: if the induction coil is too wide, the voltage on the induction coil will drop due to the reduction in inductance, and then the actual power transmitted to the tube will drop; The resistance of the back of the tube is relatively small, and the active power loss is reduced, which is beneficial to improve the welding efficiency. Of course, for an induction coil that is too narrow, although the power transmitted to the tube increases, at the same time, the active power loss on the back of the tube also increases, which also reduces the actual welding power.
Induction coil turns
The increase in the number of turns means that the resistance increases. According to the relationship between the voltage U, the current I and the resistance R, U=IR (Formula 1), it can be known that when the number of turns (R) increases, the voltage U increases accordingly, indicating that the multi-turn induction The voltage across the coil is higher than that of a single-turn induction coil, which in turn transfers more power to the tube than a single-turn. Under the premise that there is still power remaining, the power is proportional to the square of the voltage on the induction coil, see the formula:
However, the above formula also reminds us that if the number of turns is increased too much, the current on the induction coil will be reduced, and the power transmitted to the tube will be reduced. It should be pointed out that there is a lot of talk here. In fact, it is generally 2-4 turns relative to 1. The pure copper tube with φ6-14mm (small welded tube unit below 114) is wound on the corresponding cylinder. completed, convenient and quick. As for whether it is better to use 2 turns or 3 turns or 4 turns, it cannot be generalized. The key depends on the matching, the equipment power, frequency, area and length of the impedance, the diameter and wall thickness of the copper pipe, the specification of the welded pipe, the inner diameter of the induction coil and the pipe to be welded. Factors such as the gap of the outer diameter of the billet, the gap between the turns of the induction coil and the cooling intensity, as long as any one of these factors changes, will affect the evaluation of the efficiency of a certain number of turns.
In addition, in addition to the influence of the number of turns on the welding efficiency, the width of the multi-turn induction coil is also an aspect. Experience has confirmed that when the total width of the multi-turn induction coil is about 10% narrower than that of a single turn, the effect is better.
Induction coil inner diameter
The essence of studying the inner diameter of the induction coil is to explore the gap between the outer diameter of the tube blank to be welded and the welding efficiency. The power transmitted by the induction coil to the tube blank to be welded is inversely proportional to the square of this gap (one side). ∆(increment)=2~4mm is suitable.
Induction coil protection
The focus of induction coil protection should be on anti-sparking and anti-collision
Anti-collision: When the apparent quality of the welded tube blank is poor and the joint is easy to break, it is recommended to take a larger value of ∆ (increment), and sometimes the induction coil can be preserved due to a small amount. Because the time cost, material cost, and labor cost of dealing with a broken belt and crashing the induction coil are often much larger than a little bit of efficiency gain, "don't be afraid of slowness, but be afraid of standing (stop)", this is the truth.
Anti-sparking: The induction coil for welded pipes transmits high-frequency current of 200-500kHz. Affected by the sharp angle effect of high-frequency current, the induction coil is most prone to tip discharge and ignition, similar to partial short circuit, which not only consumes part of the welding energy, shortens the induction In severe cases, it cannot be welded or even damage high-frequency equipment. Therefore, the outer surface of the induction coil should be covered with necessary protection treatment, and the induction coil should not be exposed as much as possible to eliminate sharp corners. The single-turn induction coil is usually dipped with a layer of high temperature resistant epoxy resin, and the multi-turn induction coil is recommended to be sheathed with a PTFE (F4) tube. The PTFE tube can be used for a long time at a high temperature of 260 ° C and still has good insulation performance, and the breakdown voltage is 25-40kV/mm. The relationship between the thickness of the F4 pipe wall and the anti-AC breakdown voltage is shown in Table 2
Adjust the induction coil of the used pipe welded machine according to the width of the induction coil, the number of turns of the induction coil, the inner diameter of the induction coil, and the protection of the induction coil, so as to effectively solve the problem of the welding seam of the welded pipe.
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Time of issue : 2025-04-24
With increasing emphasis on cost control and environmental protection in manufacturing, used pipe welding machines have become a popular choice for SMEs due to their cost-effectiveness and sustainability. This article takes the 76-127 model as an example, providing a comprehensive analysis from multiple dimensions including technical parameters, equipment configuration, quality assessment, market advantages and industrial applications.
1. Technical Parameters and Equipment Configuration
The 76-127 used pipe welding machine unit is renowned for its high efficiency and flexibility, with core parameters as follows:
Processing range: Capable of producing square pipes (Φ40-100) and round pipes (Φ50-127) with wall thickness up to 5mm, at a production speed of 60m/min.
Key configurations:
Forming and welding: Includes 7 horizontal rolls and 9 vertical rolls forming unit, paired with 300kW solid-state high-frequency welder to ensure stable weld quality.
Auxiliary systems: Hydraulic uncoiler, shear welder, computer flying saw and Turk's head straightening device to enhance automation.
Process flow: Strip uncoiling→leveling→forming→high-frequency welding→cooling→sizing→cutting, ensuring continuous high-efficiency production.
The modular design simplifies maintenance, and after refurbishment, its performance approaches that of new machines while reducing procurement costs by 40%-60%, making it ideal for budget-conscious enterprises.
2. Key Points for Quality Assessment
According to industry standards, the quality of used pipe welding machines should be comprehensively evaluated from four aspects:
Materials and processes
Material durability: Core components such as rolls and high-frequency welders should be original to ensure corrosion resistance and tensile strength.
Process control: Welding quality directly affects joint strength, requiring precise regulation of high-frequency current's skin effect and proximity effect.
Appearance and performance
Visual inspection: The unit surface should be free of rust and deformation, with no significant wear on molds.
Performance test: Verify production speed, sizing accuracy (e.g. ovality ±0.05mm) and flying saw synchronization through trial operation.
After-sales service
Reputable suppliers like Jinyujie Electromechanical provide installation, spare parts support and technical training to reduce operational risks.
3. Market Advantages and Environmental Value
Cost-effectiveness
The 76-127 model typically costs only 50%-60% of new equipment while being ready for immediate use.
A Zhejiang-based enterprise reported 30% productivity improvement with significantly better ROI.
Sustainability
Refurbishing used equipment reduces resource waste, aligning with green manufacturing trends.
Industry adaptability
Widely used in construction (guardrails, scaffolding), automotive (exhaust pipes) and energy (oil pipelines) sectors, supporting various materials including carbon steel and stainless steel.
4. Maintenance and Risk Control
Routine maintenance
Regular lubrication and inspection of key components to prevent rust and damage.
Operation standards
Operators should receive proper training and wear protective equipment.
Procurement risks
Verify equipment sources and clarify responsibilities through formal agreements.
5. Industry Trends and Selection Recommendations
The domestic used pipe welding machine market grew 25% YoY in 2023, with increasing share of refurbished imported equipment. Selection suggestions:
Match production needs with equipment specifications
Choose reputable suppliers with comprehensive after-sales services
Conclusion
The 76-127 used pipe welding machine unit, with its mature technology, low cost and environmental benefits, has become an optimal choice for manufacturers seeking efficiency improvements. Enterprises should combine quality assessment, maintenance strategies and supplier services to maximize equipment value and promote sustainable development.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill
With increasing emphasis on cost control and environmental protection in manufacturing, used pipe welding machines have become a popular choice for SMEs due to their cost-effectiveness and sustainability. This article takes the 76-127 model as an example, providing a comprehensive analysis from multiple dimensions including technical parameters, equipment configuration, quality assessment, market advantages and industrial applications.
1. Technical Parameters and Equipment Configuration
The 76-127 used pipe welding machine unit is renowned for its high efficiency and flexibility, with core parameters as follows:
Processing range: Capable of producing square pipes (Φ40-100) and round pipes (Φ50-127) with wall thickness up to 5mm, at a production speed of 60m/min.
Key configurations:
Forming and welding: Includes 7 horizontal rolls and 9 vertical rolls forming unit, paired with 300kW solid-state high-frequency welder to ensure stable weld quality.
Auxiliary systems: Hydraulic uncoiler, shear welder, computer flying saw and Turk's head straightening device to enhance automation.
Process flow: Strip uncoiling→leveling→forming→high-frequency welding→cooling→sizing→cutting, ensuring continuous high-efficiency production.
The modular design simplifies maintenance, and after refurbishment, its performance approaches that of new machines while reducing procurement costs by 40%-60%, making it ideal for budget-conscious enterprises.
2. Key Points for Quality Assessment
According to industry standards, the quality of used pipe welding machines should be comprehensively evaluated from four aspects:
Materials and processes
Material durability: Core components such as rolls and high-frequency welders should be original to ensure corrosion resistance and tensile strength.
Process control: Welding quality directly affects joint strength, requiring precise regulation of high-frequency current's skin effect and proximity effect.
Appearance and performance
Visual inspection: The unit surface should be free of rust and deformation, with no significant wear on molds.
Performance test: Verify production speed, sizing accuracy (e.g. ovality ±0.05mm) and flying saw synchronization through trial operation.
After-sales service
Reputable suppliers like Jinyujie Electromechanical provide installation, spare parts support and technical training to reduce operational risks.
3. Market Advantages and Environmental Value
Cost-effectiveness
The 76-127 model typically costs only 50%-60% of new equipment while being ready for immediate use.
A Zhejiang-based enterprise reported 30% productivity improvement with significantly better ROI.
Sustainability
Refurbishing used equipment reduces resource waste, aligning with green manufacturing trends.
Industry adaptability
Widely used in construction (guardrails, scaffolding), automotive (exhaust pipes) and energy (oil pipelines) sectors, supporting various materials including carbon steel and stainless steel.
4. Maintenance and Risk Control
Routine maintenance
Regular lubrication and inspection of key components to prevent rust and damage.
Operation standards
Operators should receive proper training and wear protective equipment.
Procurement risks
Verify equipment sources and clarify responsibilities through formal agreements.
5. Industry Trends and Selection Recommendations
The domestic used pipe welding machine market grew 25% YoY in 2023, with increasing share of refurbished imported equipment. Selection suggestions:
Match production needs with equipment specifications
Choose reputable suppliers with comprehensive after-sales services
Conclusion
The 76-127 used pipe welding machine unit, with its mature technology, low cost and environmental benefits, has become an optimal choice for manufacturers seeking efficiency improvements. Enterprises should combine quality assessment, maintenance strategies and supplier services to maximize equipment value and promote sustainable development.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill

Time of issue : 2025-04-23
Recently, Furuiwo launched its highly anticipated used pipe welding machine—the 140 model pipe welding unit. With outstanding processing capabilities and significant cost-performance advantages, this equipment has become an ideal choice for small and medium-sized pipe processing enterprises.
Core Performance: Precision and Efficiency for Diverse Needs
The Furuiwo 140 used pipe welding machine emphasizes practicality and stability, with key technical parameters as follows:
Processing Diameter Range: Φ60-159 mm, covering production needs from light-duty pipes to medium industrial pipelines;
Processing Thickness: Supports materials up to 5 mm, suitable for construction and machinery manufacturing;
Processing Speed: 60 meters/minute, significantly improving efficiency while reducing energy consumption.
The unit adopts a modular design for easy maintenance. After comprehensive inspection and upgrades by Furuiwo’s technical team, its performance is close to new machines, yet procurement costs are substantially lower.
Market Advantages: Economic and Environmental Value
Amid intensifying competition in manufacturing, used pipe welding machines are becoming a strategic choice for cost optimization. The Furuiwo 140 model stands out with the following advantages:
Cost Savings: Priced 40%-60% lower than new machines, ideal for budget-conscious SMEs;
Rapid Deployment: Pre-tested and ready for immediate use, shortening production setup time;
Sustainability: Extends equipment lifecycle, aligning with green manufacturing trends.
Wang Qiang, Furuiwo’s Sales Director, stated: “We are committed to providing high-value solutions. This used pipe welding machine not only ensures reliability but also comes with full after-sales support, including a one-year warranty and lifelong technical assistance.”
Applications: Versatility Across Industries
The unit processes carbon steel, stainless steel, and other materials, serving industries such as:
Construction: Production of guardrails and scaffold pipes;
Automotive: Exhaust pipes and chassis components;
Energy: Customized oil and water pipelines.
A Zhejiang-based pipe manufacturer reported: “After purchasing Furuiwo’s used pipe welding machine, our productivity increased by 30%, with costs halved compared to new equipment—ROI far exceeded expectations.”
Industry Outlook: Growing Demand for Used Equipment
As manufacturing upgrades, the used industrial equipment market is booming. Industry reports indicate a 25% year-on-year growth in China’s used pipe welding machine transactions in 2023, with refurbished imported brands gaining traction. Furuiwo, leveraging technical expertise and channel advantages, has emerged as a leader in this sector.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill
Recently, Furuiwo launched its highly anticipated used pipe welding machine—the 140 model pipe welding unit. With outstanding processing capabilities and significant cost-performance advantages, this equipment has become an ideal choice for small and medium-sized pipe processing enterprises.
Core Performance: Precision and Efficiency for Diverse Needs
The Furuiwo 140 used pipe welding machine emphasizes practicality and stability, with key technical parameters as follows:
Processing Diameter Range: Φ60-159 mm, covering production needs from light-duty pipes to medium industrial pipelines;
Processing Thickness: Supports materials up to 5 mm, suitable for construction and machinery manufacturing;
Processing Speed: 60 meters/minute, significantly improving efficiency while reducing energy consumption.
The unit adopts a modular design for easy maintenance. After comprehensive inspection and upgrades by Furuiwo’s technical team, its performance is close to new machines, yet procurement costs are substantially lower.
Market Advantages: Economic and Environmental Value
Amid intensifying competition in manufacturing, used pipe welding machines are becoming a strategic choice for cost optimization. The Furuiwo 140 model stands out with the following advantages:
Cost Savings: Priced 40%-60% lower than new machines, ideal for budget-conscious SMEs;
Rapid Deployment: Pre-tested and ready for immediate use, shortening production setup time;
Sustainability: Extends equipment lifecycle, aligning with green manufacturing trends.
Wang Qiang, Furuiwo’s Sales Director, stated: “We are committed to providing high-value solutions. This used pipe welding machine not only ensures reliability but also comes with full after-sales support, including a one-year warranty and lifelong technical assistance.”
Applications: Versatility Across Industries
The unit processes carbon steel, stainless steel, and other materials, serving industries such as:
Construction: Production of guardrails and scaffold pipes;
Automotive: Exhaust pipes and chassis components;
Energy: Customized oil and water pipelines.
A Zhejiang-based pipe manufacturer reported: “After purchasing Furuiwo’s used pipe welding machine, our productivity increased by 30%, with costs halved compared to new equipment—ROI far exceeded expectations.”
Industry Outlook: Growing Demand for Used Equipment
As manufacturing upgrades, the used industrial equipment market is booming. Industry reports indicate a 25% year-on-year growth in China’s used pipe welding machine transactions in 2023, with refurbished imported brands gaining traction. Furuiwo, leveraging technical expertise and channel advantages, has emerged as a leader in this sector.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill

Time of issue : 2025-03-21
Answer: Three core advantages:
The processing capacity of this used pipe making machine includes round pipes with diameter of 60-159mm, square and rectangular pipes with diameter of 50 * 50-120 * 120mm, anda wall thickness of 2.0-5.0mm, fully covering the mainstream demand of the welded pipe equipment market.
Refurbishment guarantee for Used ERW tube mill machinery: All mechanical and electrical components undergo professional maintenance/replacement, and the life assessment of key components meets the standards. The renovation and maintenance process for second-hand welded pipe equipment takes at least one month and up to three months.
The cost efficiency of the second-hand high-frequency welded pipe machine is only 45% of that of the new welded pipe machine. The production line of the used welded pipe mills production line sold by our company includes a one-year extended warranty, free training, and lifelong technical support.
Q: After purchasing second-hand welded pipe equipment, how long can it be put into production?
Answer: Jin Yujie Company's second-hand welded pipe equipment is all sourced from first-hand sources, with stock in the warehouse. It takes 7 days to ship and 15 days to complete installation and commissioning. The second-hand welded pipe unit can be purchased and used immediately.
It is recommended to arrange a technical team and decision-makers to conduct on-site inspections of the warehouse as soon as possible, select a second-hand welded pipe unit on site, in order to put it into production as soon as possible, create production capacity for the second-hand welded pipe production line, and achieve profitability.
more datail about this 140 enlarged 165 used tube mill line, please check here:
https://www.usedpipemill.com/product/Forever-Used-High-Frequency-Welding-Pipe-Making-Machie-of-%CE%A6140-Expand-to-%CE%A6165MM-221.html
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill
Answer: Three core advantages:
The processing capacity of this used pipe making machine includes round pipes with diameter of 60-159mm, square and rectangular pipes with diameter of 50 * 50-120 * 120mm, anda wall thickness of 2.0-5.0mm, fully covering the mainstream demand of the welded pipe equipment market.
Refurbishment guarantee for Used ERW tube mill machinery: All mechanical and electrical components undergo professional maintenance/replacement, and the life assessment of key components meets the standards. The renovation and maintenance process for second-hand welded pipe equipment takes at least one month and up to three months.
The cost efficiency of the second-hand high-frequency welded pipe machine is only 45% of that of the new welded pipe machine. The production line of the used welded pipe mills production line sold by our company includes a one-year extended warranty, free training, and lifelong technical support.
Q: After purchasing second-hand welded pipe equipment, how long can it be put into production?
Answer: Jin Yujie Company's second-hand welded pipe equipment is all sourced from first-hand sources, with stock in the warehouse. It takes 7 days to ship and 15 days to complete installation and commissioning. The second-hand welded pipe unit can be purchased and used immediately.
It is recommended to arrange a technical team and decision-makers to conduct on-site inspections of the warehouse as soon as possible, select a second-hand welded pipe unit on site, in order to put it into production as soon as possible, create production capacity for the second-hand welded pipe production line, and achieve profitability.
more datail about this 140 enlarged 165 used tube mill line, please check here:
https://www.usedpipemill.com/product/Forever-Used-High-Frequency-Welding-Pipe-Making-Machie-of-%CE%A6140-Expand-to-%CE%A6165MM-221.html
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill

Time of issue : 2025-03-19
Answer: Three core advantages:
The processing capacity of this used pipe making machine includes round pipes with diameter of 60-159mm, square and rectangular pipes with diameter of 50 * 50-120 * 120mm, anda wall thickness of 2.0-5.0mm, fully covering the mainstream demand of the welded pipe equipment market.
Refurbishment guarantee for Used ERW tube mill machinery: All mechanical and electrical components undergo professional maintenance/replacement, and the life assessment of key components meets the standards. The renovation and maintenance process for second-hand welded pipe equipment takes at least one month and up to three months.
The cost efficiency of the second-hand high-frequency welded pipe machine is only 45% of that of the new welded pipe machine. The production line of the used welded pipe mills production line sold by our company includes a one-year extended warranty, free training, and lifelong technical support.
Q: After purchasing second-hand welded pipe equipment, how long can it be put into production?
Answer: Jin Yujie Company's second-hand welded pipe equipment is all sourced from first-hand sources, with stock in the warehouse. It takes 7 days to ship and 15 days to complete installation and commissioning. The second-hand welded pipe unit can be purchased and used immediately.
It is recommended to arrange a technical team and decision-makers to conduct on-site inspections of the warehouse as soon as possible, select a second-hand welded pipe unit on site, in order to put it into production as soon as possible, create production capacity for the second-hand welded pipe production line, and achieve profitability.
more datail about this 140 enlarged 165 used tube mill line, please check here:
https://www.usedpipemill.com/product/Forever-Used-High-Frequency-Welding-Pipe-Making-Machie-of-%CE%A6140-Expand-to-%CE%A6165MM-221.html
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill
Answer: Three core advantages:
The processing capacity of this used pipe making machine includes round pipes with diameter of 60-159mm, square and rectangular pipes with diameter of 50 * 50-120 * 120mm, anda wall thickness of 2.0-5.0mm, fully covering the mainstream demand of the welded pipe equipment market.
Refurbishment guarantee for Used ERW tube mill machinery: All mechanical and electrical components undergo professional maintenance/replacement, and the life assessment of key components meets the standards. The renovation and maintenance process for second-hand welded pipe equipment takes at least one month and up to three months.
The cost efficiency of the second-hand high-frequency welded pipe machine is only 45% of that of the new welded pipe machine. The production line of the used welded pipe mills production line sold by our company includes a one-year extended warranty, free training, and lifelong technical support.
Q: After purchasing second-hand welded pipe equipment, how long can it be put into production?
Answer: Jin Yujie Company's second-hand welded pipe equipment is all sourced from first-hand sources, with stock in the warehouse. It takes 7 days to ship and 15 days to complete installation and commissioning. The second-hand welded pipe unit can be purchased and used immediately.
It is recommended to arrange a technical team and decision-makers to conduct on-site inspections of the warehouse as soon as possible, select a second-hand welded pipe unit on site, in order to put it into production as soon as possible, create production capacity for the second-hand welded pipe production line, and achieve profitability.
more datail about this 140 enlarged 165 used tube mill line, please check here:
https://www.usedpipemill.com/product/Forever-Used-High-Frequency-Welding-Pipe-Making-Machie-of-%CE%A6140-Expand-to-%CE%A6165MM-221.html
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill
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