HDM is a top Chinese manufacturer of high frequency welded tubes. Our tubes are used in various industries, including automotive, cold/heat exchangers, air separation equipment, power generation, off-road/heavy-duty, and military fields. We offer patented products that reduce weight and cost while providing anti-corrosion performance, such as dimpled welded aluminum tubes for aluminum radiators and dimpled folded tubes for plate-fin heat exchangers.
We take great care to ensure that welded aluminum tubes are defect-free for your radiator assembly. Oval Aluminum tubing have no full weld seams, oil stains, crushing injuries, or dents on the surface. Additionally, they have no solder deposits on the weld seams or cracks on the end face.
HDM offers a wide range of tube sizes and can create customized radiator tubes solutions using our independently developed flexible mold and large inventory of different strength tube alloys.
HDM also offers heat exchanger tube solutions, including oval aluminum tubes and thin wall aluminum tubing. Our tubes are manufactured using high-frequency welding technology and can be customized to meet the specific needs of your heat exchanger project.
Additionally, we have a large inventory of different strength tube alloys to choose from. Contact us to learn more about our oval tubing solutions and how they can benefit your project.
Dimple folding tube for Plate & fin heat exchangers
Special tubes for garden and forestry, sports and adventure
Tubes for Grill
Tubes for flagpole
CUSTOM TUBE SOLUTIONS FOR DEMANDING APPLICATIONS
Speak with Specialist
At this initial stage, it is important to promote mutual understanding and learning in order to develop the application, performance requirements, and drawings of aluminum welded tubes.
Define key parameters
Based on the preliminary communication from the initial stage, HDM will create a material specification that includes your tube’s properties.
Trial Order + Evaluation
HDM will process customized tubes in R+D quantities for initial evaluation, following the provided specification as a guideline.
Feedback & Follow-up
Our product team will work with you to confirm final specifications based on feedback from the initial trial order. A unique part number will be created to ensure that the aluminum pipe is processed consistently every time.
Transfer to Production
With a team of dedicated engineers, product managers, and customer service staff to support you, HDM is committed to bringing your product to market with the highest level of quality in the industry.
If you have further questions, please contact your Aluminum Specialist
The full name is high frequency welded aluminum tube, abbreviated as HFW tube. Welded tube is made by using the skin effect and proximity effect of high frequency current to rapidly heat the edge of the pipe billet to the welding temperature for extrusion and welding.
What are the factors affecting the welding quality of HFW Tube?
In recent years, with the development of HFW welded pipe technology, its application area is expanding, except for the main use in HVAC&R and heat exchange, and it is increasingly used in the fields of oil pipe, boiler pipe and civil products, etc. Compared with seamless pipe, HFW welded pipe has a weld seam, and the performance of HFW welded pipe depends largely on the quality of the weld seam, so the quality of the weld seam becomes the most critical issue in the manufacturing process of HFW welded tube.
Aluminum Tube-stock alloy. Mother strip ofis the primary factor affecting the quality of the welding, the chemical composition of Aluminum tube alloy, segregation, inclusions, ribbon organization, sickle bend, plate edge burr can affect the quality of the weld seam.
The key to the forming process is to ensure that the welding into an "I" shape or a small "V" shaped butt, to avoid the V-shaped too large or inverted V-shaped butt (as shown in the figure). "I" shaped butt is the ideal form of welding, when the inner and outer walls of the aluminum tube contact at the same time, the temperature of the inner wall is higher than the temperature of the outer wall, V-shaped too large, resulting in the temperature difference between the inner and outer wall is too large, resulting in welding defects;
inverted V-shaped butt because the outer wall of the aluminum tube first contact, will cause the slag can not be smoothly discharged, resulting in excessive slag in the weld.
High frequency welding process. The welding process of welding temperature, welding speed, extrusion amount, opening angle and other factors directly affect the quality of the weld.
Heat treatment process. Heat treatment is generally used online medium frequency weld heat treatment, heating temperature above the Ae3 line 50-100 degrees Celsius, can get fine grain ferrite + pearlite organization, thus improving the toughness.
The quality of HF Welded Aluminum tube is the result of multiple factors, and only through comprehensive and strict control of the above factors can the quality of the welded seam be guaranteed and high quality welded tube be produced.