About Us
DELLOK (YONGHUI RADIATING PIPE MANUFACTURING CO.,LTD.) was established in 2002, which is located in Jiangsu, China. After many years of development, the company now has 66 million yuan in fixed assets, more than 200 employees, and 33 technical staffs. We have 4 aluminum processing production lines, with the annual processing capacity of more than 20,000 tons; And we have 5 tube-drawing production lines; 47 fintube production lines, 1 imported production line from American with the brand of McElroy , with the annual production capacity of 12 million meters the above. Quality is the theme of eternal pursuit of winner -Production workshop- Meticulous works, standardized management system and systematic quality assurance are Dellok(YONGHUI)'s best commitment to quality. In Dellok(YONGHUI), the quality control is not only the detection of the final process, but throughout the entire production process. We implement a set of quality control and assurance systems. Each batch of pipes is sampled and tested, and records are kept as a quality guarantee for the final product.
THERMAL SOLUTIONS----FINNED TUBES
About Finned Tubes
With an aim to increase the heat exchanging efficiency, It's usually to extend the surface area (or internal surface area) by adding fins onto a tube, which, through this manufacturing process, would greatly improve and upgrade the heat transferring efficiency of heating tube, it's called Finned Tube or Fin Tubes.
Our Advantages
Professional facility to produce in excess of 100 tons of quality finned tube per month.
Material Combinations
Dimensions 
| Items | Code | Dimensions | Tolerances |
| Tube outside diameter | D1 | Φ25~Φ219 mm | ±0.2 mm |
| Fin outside diameter | D2 | Φ37~Φ279 mm | ±0.75 mm |
| Fin pitch | M | 4~90 mm | ±0.2 mm |
| Fin height | H | 6~30 mm | ±0.75 mm |
| Tube thickness | δ1 | 2~16 mm | ±0.15 mm |
| Fin thickness | δ2 | 0.8~2.5 mm | ±0.1 mm |
| Unfinned tube ends length | L1 | customized | ±1‰*L1 mm |
| Unfinned tube ends length | L2 | customized | ±1‰*L2 mm |
| Maximum tube length | L | 0.5~25 m | ±1‰*L mm |
Ordering and Delivery
For a given pipe or tube size, the desired heat transfer surface area per unit length of tube can be obtained by specifying the appropriate fin height, fin thickness and number of fins per inch. If the whole transfer surface area of the finned tube is A and the transfer surface area is A0, then nominal the ratio A/A0 should be 5 to 12.
FAQ
Q: What is your the lead time for production?
A: Generally Sample needs 1-3 days, mass production needs 15-30 days, also depends on your request.
Q: What is the warranty for your products?
A :We provide one year warranty for the products.
Q: What payment terms do you accept?
A :Trade assurance,TT,Western Union.
Q: What are the modes of transportation of machines?
A: Air freight, sea freight express delivery, etc. We will choose the most suitable transportation method according to your requirements.
