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Tension adjustment of sizing section of used high frequency welded pipe equipment

Tension adjustment of sizing section of used high frequency welded pipe equipment

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  • Release time:2023-05-08 11:30
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【概要描述】The process characteristics of the used high frequency welded pipe equipment are: at the same time, the forming section, the welding section and the sizing section respectively perform continuous operations with completely different process connotations and process objectives for the same flexible welded pipe blank. In order to ensure the pipe blank In the forming section, welding section and sizing section, neither "pulling the tube" nor "pushing the tube" occurs. According to the rolling principle, it is necessary to ensure that the welded tube blank maintains proper tension in each section.

Tension adjustment of sizing section of used high frequency welded pipe equipment

【概要描述】The process characteristics of the used high frequency welded pipe equipment are: at the same time, the forming section, the welding section and the sizing section respectively perform continuous operations with completely different process connotations and process objectives for the same flexible welded pipe blank. In order to ensure the pipe blank In the forming section, welding section and sizing section, neither "pulling the tube" nor "pushing the tube" occurs. According to the rolling principle, it is necessary to ensure that the welded tube blank maintains proper tension in each section.

  • Sort:Information
  • Auth:
  • Source:
  • Release time:2023-05-08 11:30
  • Pvs:
Detail

The process characteristics of the used high frequency welded pipe equipment are: at the same time, the forming section, the welding section and the sizing section respectively perform continuous operations with completely different process connotations and process objectives for the same flexible welded pipe blank. In order to ensure the pipe blank In the forming section, welding section and sizing section, neither "pulling the tube" nor "pushing the tube" occurs. According to the rolling principle, it is necessary to ensure that the welded tube blank maintains proper tension in each section.

 

In addition to the pass speed and rolling force, the factors that affect the tension are the sizing allowance, the outer diameter of the welded pipe, the wall thickness, the deformation method (round, round, and different), and the raw materials of the tube blank (hot rolling, cold rolling, etc.). rolling, hard cooling, annealing, etc.), coolant, pass shape and surface roughness, etc. If the tension is too small, the welded pipe cannot run stably in the sizing roller, the welding seam sways from side to side, the tolerance size fluctuates greatly, the straightness changes frequently, and even causes "push pipe"; if the tension is too large, the hole pattern is easy to wear and even pull Broken strip steel joint.

 

Used high frequency welded pipe equipment

 

Coordination of tension between sizing section and welding section

During the operation and welding of used high frequency welded pipe equipment, the circumference of the welded pipe blank in the welding section is shortened after being squeezed by the extrusion roller, and some of them are converted into internal and external burrs, and some of them are converted into thickness increments. If the converted length is not absorbed in this section (especially for materials with high hardness), then the cumulative longitudinal growth will inevitably lead to the welded pipe under the combined action of the thrust of the forming section and the resistance of the sizing section Arching between the squeeze rolls prevented production from continuing. Therefore, it is necessary to maintain a certain tension in the sizing section to digest and absorb the length increment.

 

A method of adjusting the tension of the welding section. Corresponding adjustment measures can be taken according to the power supply method of used high frequency welded pipe equipment.

(1) The unit with the same dragging + forming and sizing speed ratio

Control method 1: The tension factor is taken into account in the design of the roll, so that there is a reasonable difference between the bottom diameter of the first flat roll for sizing and the bottom diameter of the final flat roll for forming.

 

Control method 2: Appropriately increase the rolling force of the sizing flat roll, and at the same time appropriately reduce the rolling force of the sizing vertical roll, which actually increases the frictional force of the driving roll and forms the pulling of the welded pipe in the welded section, thereby increasing the Tension on welded pipe with large welded section.

 

Control method 3: Appropriately increase the extrusion force and the guide roller to press down, so that the resistance of the guide roller and the squeeze roller increases, which is equivalent to pulling the welded pipe in the forming direction and thus increasing the tension of the welding section. Control method 4: Appropriately reduce the pressure of the forming flat roll, and at the same time, the rolling force of the forming vertical roll can be appropriately increased, which is consistent with the principle of method three.

 

Used high frequency welded pipe equipment

 

(2) Units with single drag + forming and different sizing speed ratios

In terms of controlling the longitudinal tension of the welding section, there is no essential difference between this unit and the previous unit. Because the speed ratio is constant, the bottom diameter of the forming flat roll and the bottom diameter of the sizing flat roll are actually fixed values, that is, the speeds of the forming section and the welding section are also fixed values, so you can refer to the tension control method of the above unit for reference.

 

(3) Double drag unit

The method of controlling the longitudinal tension of the welding section is to adjust the speed of the other motor relative to the fixed forming motor or the sizing motor to change the speed of the sizing machine or the forming machine, and the tension of the welding section changes accordingly.

 

Whole line tension control

Main line tension coordination of used high frequency welded pipe equipment is the premise and guarantee for the smooth operation of the welded pipe unit. The adjustment of the whole line is usually carried out after a full roll change or a half roll change.

 

Used high frequency welded pipe equipment

 

Appropriate standard for measuring sizing tension

(1) The welded pipe runs in a straight line in the cooling water tank without shaking and waves left and right.

(2) The position of the welding seam is basically fixed in the cooling section and the sizing machine, without torsion and left-right deflection.

(3) There is no wear tumor on the edge of the pass of the sizing flat roll. If the direction of the wear nodule is consistent with the rotation of the pass, at least it means that the sizing rolling force is too large, otherwise, it means that it is too small.

Randomly saw the welded pipe between the cooling section of the welded pipe and the sizing, and judge the longitudinal tension according to whether there is a feeling of "clamping the saw blade" during the sawing process.

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Application of high precision steel pipe produced by pipe welding machine in modern industry
Application of high precision steel pipe produced by pipe welding machine in modern industry
The high-precision steel pipe produced by pipe welding machine is widely used in modern industry, and its production process and quality control requirements are strict. The following is a summary of the relevant technical points and application scenarios:

1. The characteristics of high-precision steel pipe
High dimensional accuracy: small outer diameter, wall thickness tolerance (usually up to ±0.05mm), low ellipticity.
Excellent surface quality: smooth weld without burrs, surface finish Ra≤0.8μm.
Stable mechanical properties: weld strength close to the base material, uniform compressive/tensile properties.
Applicable materials: stainless steel (304/316L), carbon steel, alloy steel (such as API series), etc.

2. Core production process
(1) Type of pipe welding machine
High-frequency welding (HFW) : high efficiency, suitable for medium thin wall pipe (Φ10~Φ600mm), need to cooperate with precision forming unit.
Laser welding: small heat affected zone, narrow weld (0.1~0.3mm), suitable for ultra-thin walls (such as 0.3mm) or special alloys.
TIG welding: For high alloy steel or thick wall pipe, higher weld purity.
(2) Key process links
Forming process: multi-roll continuous cold forming, dynamic adjustment of roll parameters to compensate for rebound.
Welding control:
High frequency welding: precise control of current frequency (100~400kHz) and extrusion amount.
Laser welding: focus position accuracy ±0.05mm, real-time depth monitoring (such as CCD vision).
Online detection:
Eddy current inspection (ET) : Detection of surface cracks.
Ultrasonic inspection (UT) : detection of internal defects (sensitivity Φ0.5mm equivalent flat hole).
Laser caliper: Outer diameter closed loop control (accuracy ±0.01mm).

3. Post-processing technology
Heat treatment: bright annealing (hydrogen nitrogen protection atmosphere) to eliminate stress, hardness fluctuation ≤3HRC.
Straightening: multi-roll precision straightening, straightness ≤0.5mm/m.
Surface treatment:
Electrolytic polishing (EP) : For medical/food grade stainless steel tubes, Ra up to 0.2μm.
Coating: hot dip galvanizing (zinc layer ≥80μm) or electroless nickel plating (uniform thickness ±2μm).

4. Typical application areas
Automobile manufacturing: fuel injection pipe (tolerance ±0.03mm), hydraulic pipe.
Semiconductor equipment: Ultra-high clean gas delivery pipe (inner wall EP treatment, particle ≤Class 5).
Medical instruments: endoscopic catheter (Φ1~5mm, wall thickness 0.1mm).
Energy industry: Instrument tubes for nuclear power plants (SA213-TP347H material, intergranular corrosion test passed).

5. Quality control standards
International standard:
ASTM A269 (Universal Seamless and Welded Austenitic Stainless Steel Pipe)
EN 10305-4 (Precision welded pipes for hydraulic systems)
Industry certification: ISO 9001, PED 2014/68/EU (Pressure Equipment Directive).

6. Technological trends
Intelligent production: AI algorithm optimizes welding parameters, and the yield is increased to more than 99.5%.
Composite process: laser + arc composite welding, both efficiency and quality (speed increased by 30%).
Green manufacturing: low energy high frequency power supply (efficiency ≥90%), waste acid recovery ≥95%.

Through the above process optimization and strict quality control, the high-precision steel pipe produced by the pipe welding machine can meet the demanding requirements of size, performance and reliability in high-end industrial fields. In actual production, the process route needs to be customized according to the material characteristics and uses, for example, medical tubes need to undergo additional passivation treatment and biocompatibility testing.

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 
Detail
The high-precision steel pipe produced by pipe welding machine is widely used in modern industry, and its production process and quality control requirements are strict. The following is a summary of the relevant technical points and application scenarios:

1. The characteristics of high-precision steel pipe
High dimensional accuracy: small outer diameter, wall thickness tolerance (usually up to ±0.05mm), low ellipticity.
Excellent surface quality: smooth weld without burrs, surface finish Ra≤0.8μm.
Stable mechanical properties: weld strength close to the base material, uniform compressive/tensile properties.
Applicable materials: stainless steel (304/316L), carbon steel, alloy steel (such as API series), etc.

2. Core production process
(1) Type of pipe welding machine
High-frequency welding (HFW) : high efficiency, suitable for medium thin wall pipe (Φ10~Φ600mm), need to cooperate with precision forming unit.
Laser welding: small heat affected zone, narrow weld (0.1~0.3mm), suitable for ultra-thin walls (such as 0.3mm) or special alloys.
TIG welding: For high alloy steel or thick wall pipe, higher weld purity.
(2) Key process links
Forming process: multi-roll continuous cold forming, dynamic adjustment of roll parameters to compensate for rebound.
Welding control:
High frequency welding: precise control of current frequency (100~400kHz) and extrusion amount.
Laser welding: focus position accuracy ±0.05mm, real-time depth monitoring (such as CCD vision).
Online detection:
Eddy current inspection (ET) : Detection of surface cracks.
Ultrasonic inspection (UT) : detection of internal defects (sensitivity Φ0.5mm equivalent flat hole).
Laser caliper: Outer diameter closed loop control (accuracy ±0.01mm).

3. Post-processing technology
Heat treatment: bright annealing (hydrogen nitrogen protection atmosphere) to eliminate stress, hardness fluctuation ≤3HRC.
Straightening: multi-roll precision straightening, straightness ≤0.5mm/m.
Surface treatment:
Electrolytic polishing (EP) : For medical/food grade stainless steel tubes, Ra up to 0.2μm.
Coating: hot dip galvanizing (zinc layer ≥80μm) or electroless nickel plating (uniform thickness ±2μm).

4. Typical application areas
Automobile manufacturing: fuel injection pipe (tolerance ±0.03mm), hydraulic pipe.
Semiconductor equipment: Ultra-high clean gas delivery pipe (inner wall EP treatment, particle ≤Class 5).
Medical instruments: endoscopic catheter (Φ1~5mm, wall thickness 0.1mm).
Energy industry: Instrument tubes for nuclear power plants (SA213-TP347H material, intergranular corrosion test passed).

5. Quality control standards
International standard:
ASTM A269 (Universal Seamless and Welded Austenitic Stainless Steel Pipe)
EN 10305-4 (Precision welded pipes for hydraulic systems)
Industry certification: ISO 9001, PED 2014/68/EU (Pressure Equipment Directive).

6. Technological trends
Intelligent production: AI algorithm optimizes welding parameters, and the yield is increased to more than 99.5%.
Composite process: laser + arc composite welding, both efficiency and quality (speed increased by 30%).
Green manufacturing: low energy high frequency power supply (efficiency ≥90%), waste acid recovery ≥95%.

Through the above process optimization and strict quality control, the high-precision steel pipe produced by the pipe welding machine can meet the demanding requirements of size, performance and reliability in high-end industrial fields. In actual production, the process route needs to be customized according to the material characteristics and uses, for example, medical tubes need to undergo additional passivation treatment and biocompatibility testing.

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 
The relationship between pipe welding machine and automobile frame manufacturing
The relationship between pipe welding machine and automobile frame manufacturing
The relationship between pipe welding machine and automobile frame manufacturing is mainly reflected in the production process, material selection and process optimization. The following is a technical analysis of the relationship between the two:

1.The role of pipe welding machine in the manufacture of automobile frame
Pipe production: The welding pipe machine is used to manufacture high-precision welded steel pipes, which constitute the longitudinal beams, beams, anti-collision beams and other key components of the automobile frame. High frequency welding (HFW) or laser welding technology can produce steel pipes with uniform wall thickness and strength of more than 800MPa to meet the needs of lightweight.
Customized processing: Through flexible forming technology, the welding machine can produce special-shaped cross section pipes (such as rectangular, trapezoidal), adapt to the topology optimization design of different models of frames, improve space utilization and impact energy absorption efficiency.

2.The core requirements of the welding pipe process for automobile frames
Material properties: DP600/DP800 duplex steel or 22MnB5 thermoforming steel should be used, and online heat treatment (such as induction annealing) should be carried out after welding to ensure the microstructure consistency between the weld zone and the base material and avoid HAZ (heat affected zone) softening.
Dimensional accuracy: Diameter tolerance should be controlled within ±0.2mm, ellipticity ≤0.5%, to ensure the matching accuracy of the assembly and stamping parts (clearance <0.5mm).

3.Key technology breakthrough point
Laser-MAG composite welding: the penetration depth can reach 8mm, the welding speed is increased to 6m/min, the heat input is reduced by 30%, and the welding deformation of the frame is significantly reduced (≤1.5mm/m).
Online quality monitoring: high-speed CCD vision system (sampling rate 2000fps) with eddy current detection, to achieve real-time detection of weld defects, miss rate <0.01%.

4.Cost-performance balance
Compared with the stamping and welding structure, the welded pipe frame can reduce the weight by 15-20%, the material utilization rate is increased to 95%, and the manufacturing cost of the bicycle is reduced by about 1200 yuan. However, it is necessary to increase the investment in roller forming molds (about 2 million yuan/set).

5.Industry Application Cases
- An independent brand pure level station adopts 3D variable cross-section welded pipe subframe, with torsional rigidity increased to 27000Nm/°, 40% higher than the traditional structure, and the battery pack space utilization increased by 12%.

Conclusion
The penetration rate of welded pipe technology in the field of automotive frames is growing at a rate of 8% per year, and future development directions include:
Intelligent welded pipe system (digital twin model real-time control molding parameters)
Magnesium alloy /CFRP composite pipe welding process
Topological optimization driven continuous forming technology for variable thickness pipes

It is recommended to pay attention to the update of the ISO 15614 standard and the latest certification requirements for automotive welded pipe processes in ASME BPVC Section IX to ensure technical compliance.

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 
Detail
The relationship between pipe welding machine and automobile frame manufacturing is mainly reflected in the production process, material selection and process optimization. The following is a technical analysis of the relationship between the two:

1.The role of pipe welding machine in the manufacture of automobile frame
Pipe production: The welding pipe machine is used to manufacture high-precision welded steel pipes, which constitute the longitudinal beams, beams, anti-collision beams and other key components of the automobile frame. High frequency welding (HFW) or laser welding technology can produce steel pipes with uniform wall thickness and strength of more than 800MPa to meet the needs of lightweight.
Customized processing: Through flexible forming technology, the welding machine can produce special-shaped cross section pipes (such as rectangular, trapezoidal), adapt to the topology optimization design of different models of frames, improve space utilization and impact energy absorption efficiency.

2.The core requirements of the welding pipe process for automobile frames
Material properties: DP600/DP800 duplex steel or 22MnB5 thermoforming steel should be used, and online heat treatment (such as induction annealing) should be carried out after welding to ensure the microstructure consistency between the weld zone and the base material and avoid HAZ (heat affected zone) softening.
Dimensional accuracy: Diameter tolerance should be controlled within ±0.2mm, ellipticity ≤0.5%, to ensure the matching accuracy of the assembly and stamping parts (clearance <0.5mm).

3.Key technology breakthrough point
Laser-MAG composite welding: the penetration depth can reach 8mm, the welding speed is increased to 6m/min, the heat input is reduced by 30%, and the welding deformation of the frame is significantly reduced (≤1.5mm/m).
Online quality monitoring: high-speed CCD vision system (sampling rate 2000fps) with eddy current detection, to achieve real-time detection of weld defects, miss rate <0.01%.

4.Cost-performance balance
Compared with the stamping and welding structure, the welded pipe frame can reduce the weight by 15-20%, the material utilization rate is increased to 95%, and the manufacturing cost of the bicycle is reduced by about 1200 yuan. However, it is necessary to increase the investment in roller forming molds (about 2 million yuan/set).

5.Industry Application Cases
- An independent brand pure level station adopts 3D variable cross-section welded pipe subframe, with torsional rigidity increased to 27000Nm/°, 40% higher than the traditional structure, and the battery pack space utilization increased by 12%.

Conclusion
The penetration rate of welded pipe technology in the field of automotive frames is growing at a rate of 8% per year, and future development directions include:
Intelligent welded pipe system (digital twin model real-time control molding parameters)
Magnesium alloy /CFRP composite pipe welding process
Topological optimization driven continuous forming technology for variable thickness pipes

It is recommended to pay attention to the update of the ISO 15614 standard and the latest certification requirements for automotive welded pipe processes in ASME BPVC Section IX to ensure technical compliance.

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 
89 Pipe welding machine is used to produce steel pipes for highway fences
89 Pipe welding machine is used to produce steel pipes for highway fences
89 Pipe welding machine is a kind of equipment specially used for the production of welded steel pipes. It is very important in the production of steel pipes for highway fences:



89 The working principle of the pipe welding machine 89 The pipe welding machine uncoils the steel strip, feeds and welds it into a round steel pipe, and then cools, straightens and cuts the steel pipe to the required length. The main steps include:

1. Uncoiling: Unroll the steel strip from the drum and level it through the straightener.

2. Forming: The steel strip is rolled into a tube shape through a series of roller wheels.

3. Welding: high frequency current is used to heat the joint of the steel strip, so as to weld the steel pipe.

4. Cooling: The welded steel pipe is cooled by cooling equipment.

5. Straightening and cutting: Finally, straighten and cut the steel pipe to the required length.



The main steel pipe used in the highway fence needs to have a certain strength and impact resistance, but also corrosion resistance. Specific features include:

1. High strength: the steel pipe must be able to withstand the impact to ensure the safety of the highway.

2. Corrosion resistance: steel pipes are usually galvanized to enhance their corrosion resistance and adapt to harsh outdoor environments.

3. Standard size: The steel pipe produced generally has strict size requirements to ensure the stability of the fixed connection of each fence.



The steel pipe produced by the 89 pipe welding machine plays a skeleton role in the highway fence, and its application is reflected in:

1. Guardrail: installed on both sides of the highway or in the middle, to prevent the vehicle from losing control of the road, to protect the safety of the driver.

2. Isolation belt: Set isolation belts between lanes in different directions to prevent vehicles from crossing lanes and reduce the incidence of accidents.

3. Sound barrier: The use of steel pipe frame to support the sound barrier plate to reduce the impact of road noise on the surrounding environment.



In short, the 89 pipe welding machine plays a key role in the production of steel pipes for highway fences, ensuring the stability, durability and safety of the fences, thus providing a reliable guarantee for the safe operation of the highways.

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 
Detail
89 Pipe welding machine is a kind of equipment specially used for the production of welded steel pipes. It is very important in the production of steel pipes for highway fences:



89 The working principle of the pipe welding machine 89 The pipe welding machine uncoils the steel strip, feeds and welds it into a round steel pipe, and then cools, straightens and cuts the steel pipe to the required length. The main steps include:

1. Uncoiling: Unroll the steel strip from the drum and level it through the straightener.

2. Forming: The steel strip is rolled into a tube shape through a series of roller wheels.

3. Welding: high frequency current is used to heat the joint of the steel strip, so as to weld the steel pipe.

4. Cooling: The welded steel pipe is cooled by cooling equipment.

5. Straightening and cutting: Finally, straighten and cut the steel pipe to the required length.



The main steel pipe used in the highway fence needs to have a certain strength and impact resistance, but also corrosion resistance. Specific features include:

1. High strength: the steel pipe must be able to withstand the impact to ensure the safety of the highway.

2. Corrosion resistance: steel pipes are usually galvanized to enhance their corrosion resistance and adapt to harsh outdoor environments.

3. Standard size: The steel pipe produced generally has strict size requirements to ensure the stability of the fixed connection of each fence.



The steel pipe produced by the 89 pipe welding machine plays a skeleton role in the highway fence, and its application is reflected in:

1. Guardrail: installed on both sides of the highway or in the middle, to prevent the vehicle from losing control of the road, to protect the safety of the driver.

2. Isolation belt: Set isolation belts between lanes in different directions to prevent vehicles from crossing lanes and reduce the incidence of accidents.

3. Sound barrier: The use of steel pipe frame to support the sound barrier plate to reduce the impact of road noise on the surrounding environment.



In short, the 89 pipe welding machine plays a key role in the production of steel pipes for highway fences, ensuring the stability, durability and safety of the fences, thus providing a reliable guarantee for the safe operation of the highways.

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 
Purchase used pipe making machine
Purchase used pipe making machine
Time of issue : 2025-01-23
When purchasing used pipe making machines, you can consider the following points:

1.Supply channels:
Online marketplaces: For example, Taobao, Alibaba, Jingdong and other platforms can search and find used equipment.
Professional used equipment market: Some areas have a special used equipment market, you can view the equipment situation on the spot.
Industry exhibitions: Participate in machinery, manufacturing related exhibitions, sometimes you can find suppliers to provide second-hand equipment opportunities.
Peers and recommendations: Ask peers and friends in the industry to obtain reliable equipment and supplier information.

2.Selection criteria:
Equipment condition: Carefully check the service life, maintenance records and running status of the equipment to ensure that the function is intact.
Brand and model: Choose well-known brands and reliable models, usually the quality is guaranteed, and the after-sales service is relatively perfect.
Price comparison: multiple inquiries to ensure reasonable prices to avoid buying inferior equipment at low prices.
Service and Accessories: Find out if the supplier provides after-sales service and accessories to ensure convenient maintenance in subsequent use.

3.Site inspection:
Equipment operation demonstration: The seller is required to perform equipment operation demonstration to observe the actual operation.
Technical Support: Evaluate the seller's technical support capabilities, including whether to provide installation and commissioning services.
Contract protection: Sign a detailed procurement contract to clarify the responsibilities of both parties, equipment specifications, payment methods, after-sales service and other content.

4.Trial Period:
Trial commitment: Try to strive for a certain trial period in order to find potential problems with the equipment during use.
Troubleshooting: During the trial period, pay close attention to the operation of the equipment, if there is a failure, contact the seller as soon as possible.

Through the above methods, you can better purchase a satisfactory second-hand pipe making machine.

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 
Detail
When purchasing used pipe making machines, you can consider the following points:

1.Supply channels:
Online marketplaces: For example, Taobao, Alibaba, Jingdong and other platforms can search and find used equipment.
Professional used equipment market: Some areas have a special used equipment market, you can view the equipment situation on the spot.
Industry exhibitions: Participate in machinery, manufacturing related exhibitions, sometimes you can find suppliers to provide second-hand equipment opportunities.
Peers and recommendations: Ask peers and friends in the industry to obtain reliable equipment and supplier information.

2.Selection criteria:
Equipment condition: Carefully check the service life, maintenance records and running status of the equipment to ensure that the function is intact.
Brand and model: Choose well-known brands and reliable models, usually the quality is guaranteed, and the after-sales service is relatively perfect.
Price comparison: multiple inquiries to ensure reasonable prices to avoid buying inferior equipment at low prices.
Service and Accessories: Find out if the supplier provides after-sales service and accessories to ensure convenient maintenance in subsequent use.

3.Site inspection:
Equipment operation demonstration: The seller is required to perform equipment operation demonstration to observe the actual operation.
Technical Support: Evaluate the seller's technical support capabilities, including whether to provide installation and commissioning services.
Contract protection: Sign a detailed procurement contract to clarify the responsibilities of both parties, equipment specifications, payment methods, after-sales service and other content.

4.Trial Period:
Trial commitment: Try to strive for a certain trial period in order to find potential problems with the equipment during use.
Troubleshooting: During the trial period, pay close attention to the operation of the equipment, if there is a failure, contact the seller as soon as possible.

Through the above methods, you can better purchase a satisfactory second-hand pipe making machine.

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 
Contact information
Tel: +86-13392281699
Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province

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