Key points of welding quality of used welded pipe machine (2)
- Sort:Information
- Auth:
- Source:
- Release time:2022-12-05 11:30
- Pvs:
【概要描述】There are many factors that affect the welding quality of used welded pipe machine, and these factors interact and restrict each other in the same system.
Key points of welding quality of used welded pipe machine (2)
【概要描述】There are many factors that affect the welding quality of used welded pipe machine, and these factors interact and restrict each other in the same system.
- Sort:Information
- Auth:
- Source:
- Release time:2022-12-05 11:30
- Pvs:
There are many factors that affect the welding quality of used welded pipe machine, and these factors interact and restrict each other in the same system.
When one factor changes, other factors will also change as it changes. Therefore, in the high frequency adjustment, it is not enough to pay attention to the local adjustment of the frequency, power, current or squeeze amount of the used welded pipe machine.
This adjustment must be based on the specific conditions of the entire molding system, comprehensively considered from all aspects related to high-frequency welding, and adjusted by excluding all influencing factors one by one.
Below we break down the main factors in the high-frequency welding process, there are the following eight aspects, we will introduce ③Welding method. ④ Input power.
③Welding method
There are two ways of high frequency welding: contact welding and induction welding
In contact welding, a pair of copper electrodes are in contact with the two sides of the material being welded, and the induced current has good penetration. The two effects of high-frequency current (proximity effect & skin effect) are maximized due to the direct contact between the copper electrode and the steel plate Utilization, so the welding efficiency of contact welding is higher and the power consumption is lower. It is widely used in the production of high-speed and low-precision pipes. It is generally necessary to use contact welding when producing particularly thick welded pipes.
However, contact welding has two disadvantages: one is that the copper electrode is in contact with the steel plate and wears quickly. Second, due to the influence of the flatness of the surface of the steel plate and the straightness of the edges, the current stability of contact welding is poor, and the internal and external burrs of the weld are relatively high. It is generally not used when welding high-precision welded pipes.
Induction welding is to wrap one or more turns of induction coil outside the welded steel pipe. The effect of multi-turn is better than single-turn, but it is more difficult to make and install multi-turn induction coil.
When using induction welding, a small distance between the induction coil and the surface of the steel pipe is more efficient, but it is easy to cause discharge between the induction coil and the pipe. At the same time, if the shape is irregular, the induction coil will be easily scratched if the gap is too small. Generally, the induction should be maintained A gap of 5-8mm between the coil and the surface of the steel pipe is appropriate.
When using induction welding, because the induction coil does not contact the steel plate, there is no wear and the induced current is relatively stable, which ensures the stability of the weld during welding, and the welded steel pipe has good surface quality and smooth welds.
④Input power
Input power control during high-frequency welding is very important, and constant and stable input power is even more important. If the power is too low, the billet groove heating is insufficient, and the welding temperature cannot be reached, which will cause unwelded defects such as false welding, desoldering, and pinch welding; when the power is too high, the welding stability will be affected, and the billet groove surface will be heated. The temperature is much higher than the temperature required for welding, causing serious splashes, pinholes, slag inclusions and other defects. This type of defect is called an overburning defect.
The input power during high-frequency welding should be adjusted and determined according to the pipe diameter, pipe wall thickness, forming unit speed, and whether to remove internal burrs. Different molding methods, different unit equipment, different metal materials, different steel grades, and even different batches of raw materials will have an impact. This needs to be considered comprehensively, summarized from the first line of production, and compile a high Frequency welding process.
Therefore, if you fully understand that the welding method and input power will affect the welding quality of the used welded pipe machine, it is necessary to analyze other aspects of the welding quality of the used welded pipe machine before you can summarize the method. The next issue will introduce the ⑤ tube Billet groove. ⑥ welding speed. If necessary, you can continue to pay attention to us.
More News

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
Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province
Recommendation
Online Inquiry
LINK
Contact Us
Tel (wechat): 13336487288
Wechat:+86 13336487288
WhatsApp:+86 13336487288
Email: zty@usedpipemill.com
Address: No. A99, Lecong Avenue East, Lecong Town, Foshan City, Guangdong Province
