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Common faults of used welded pipe mills production line forming machines (1)

Common faults of used welded pipe mills production line forming machines (1)

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  • Release time:2022-12-18 11:30
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【概要描述】Common faults of used welded pipe mills production line forming machines can be divided into ① deviation. ② scratches. ③ "indenter" phenomenon. ④ "drill belt" phenomenon. In order to let everyone understand the common faults of the molding machine in detail, we will introduce ① deviation.

Common faults of used welded pipe mills production line forming machines (1)

【概要描述】Common faults of used welded pipe mills production line forming machines can be divided into ① deviation. ② scratches. ③ "indenter" phenomenon. ④ "drill belt" phenomenon. In order to let everyone understand the common faults of the molding machine in detail, we will introduce ① deviation.

  • Sort:Information
  • Auth:
  • Source:
  • Release time:2022-12-18 11:30
  • Pvs:
Detail

Common faults of used welded pipe mills production line forming machines can be divided into ① deviation. ② scratches. ③ "indenter" phenomenon. ④ "drill belt" phenomenon. In order to let everyone understand the common faults of the molding machine in detail, we will introduce ① deviation.

 

The deviation is also called turning over the belt. Due to various reasons, the deviation will occur at any time between the rolls of the forming machine. The specific performance is that after the tube blank comes out of the flat roll or vertical roll, the heights of the two edges are different. In severe cases, the tube blank will turn over and cannot enter the next pass smoothly, so it is forced to stop processing, which directly affects the production. Increase in work rate. However, there are two reasons for the deviation of the forming machine of the used welded pipe mills production line, that is, the deviation of the flat roll and the deviation of the vertical roll. We will introduce them in detail according to these two reasons.

 

1.1 Analysis of the cause of the deviation of the flat roller

The deviation of the flat roll is mainly caused by the following reasons (excluding the defects such as the camber of the raw material).

 

(1) The center of the hole pattern is not correct.

When the position of the center of the pass is not correct, the tube blank will deviate from the rolling center line during the rolling process and deviate. When the deformation angle of the pass is greater than 90°, and the center of the pass of the upper and lower rolls is not aligned, the tube blank will be turned up in the direction of the deviation of the center of the pass, as shown in Figure 8(a); when the center of the pass of the lower roll is not aligned, The tube blank will also be turned up in the direction of deviation from the center of the pass, as shown in Figure 8(b); when the center of the upper roll pass is not aligned, the tube blank will be turned up in the opposite direction, as shown in Figure 8(c). If the deformation angle of the tube blank is less than 90°, except when the upper and lower hole patterns are displaced as a whole, which is opposite to the deformation greater than 90° (as shown in Figure 9), the rest are in the same direction as the same type of offset. This is a specific manifestation of the deviation of the tube blank caused by the irregular center of the pass after several axial displacements of the roll. During the treatment, according to the assembly structure of the roll, check whether the positioning device and shaft of the roll have locking failure and looseness out of control, and adjust the tightening in time before production.

Used welded pipe mills production line

 

Used welded pipe mills production line

 

(2) Uneven pressure on the upper roller.

When the pressure of the upper roller is not uniform, it can cause the upper flat roller to be tilted and biased, so that the gaps on both sides of the upper and lower rollers are different.

 

That is, when the deformation angle is less than 90°, the tube blank will be turned up to the side with lower pressure, as shown in Figure 10(a); when the deformation angle is greater than 90°, the tube blank will be turned up to the side with higher pressure, as shown in Figure 10 ( b). The tube blank in the closed hole pattern will also rotate in the direction of less pressure to control the direction of the tube seam. In this case, adjust the pressing amount of the flat roll, keep the upper roll in a horizontal position, and make auxiliary direction adjustment with the help of the front vertical roll of the flat roll.

 

Used welded pipe mills production line

(3)Bearing damage.

Whether the bearing of the upper or lower roll is damaged, the reduction of the upper roll will change, resulting in the deviation of the tube blank. The deviation of the deviation is exactly the same as the deviation caused by the uneven pressure. In production, we need to detect the abnormal rotation sound of the bearing, or whether the touch part is hot, we can judge the damage degree of the bearing, and replace it in time without blind adjustment.

 

(4)Insufficient pressure.

What we mean by insufficient pressure means that after the upper roller is pressed, there is still a large gap between the tube blank and the pass, and the pass cannot completely or well control the tube blank and the deviation occurs. Its performance is that the tube blank floats during operation, and swings up and down from left to right. If it is in the lead, the head of the tube blank will be upturned, which can be solved as long as the reduction amount is appropriately increased.

 

(5)Incorrect multi-pass hole type.

Incorrect multi-pass pass means that the center of two or more passes is not on the rolling line. When the tube blank deviates, a strange phenomenon often occurs during the adjustment. For example: When the tube blank is turned up to the outside, we will try to make it move inward according to the adjustment principle to overcome the problem of eversion. However, after the adjustment, the tube blank will suddenly turn inward when it continues to run, and sometimes the inward turning phenomenon will occur in the same direction at the back of the tube blank running. The conventional adjustment method cannot solve this problem. This is because the center of the multi-pass hole type is not correct. At this time, the tube blank is a twisting operation process in the forming machine (Fig. 11). For this deviation phenomenon, we should find the cause from the back of the tube blank, that is, find the problem from the first few passes of the forming machine, and make micro-adjustments and alignments one by one, so that the center of each pass is the same. When it can coincide with the rolling center, the deviation phenomenon can be fundamentally solved. This is the origin of the adjustment jargon that we often say is called "turning the back and adjusting the front".

 

Used welded pipe mills production line

(6) The center of the vertical roller is not correct.

The misalignment of the vertical roll center is also an important factor for the deviation of the tube blank after the flat roll comes out. The reason why this phenomenon is often overlooked is that the operation of the tube blank on the vertical roll is basically in a normal state, so in production, special attention should be paid to observe whether the tube blank is normal at the moment before it enters the flat roll after it comes out of the vertical roll. If the center of the vertical roller deviates, as long as we adjust the position of the vertical roller a little, we can control the best direction of the tube blank entering the flat roller, so that the deviation problem can be solved.

 

The reasons for the deviation of the common faults of the forming machine of the used welded pipe mills production line are mainly divided into the deviation of the flat roll and the deviation of the vertical roll. Today, we will introduce the analysis of the reasons for the deviation of the flat roll: ① The center of the hole is not correct.② The upper roll Uneven pressure.③Damage of pumping bearing ④Insufficient pressure.⑤Incorrect multi-pass hole type.⑥The center of the vertical roller is not correct.

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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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