Murphy Thermal Energy Co., Ltd.
Brand: Murphy
Status: New
Applicable Industry: Machinery Repair Shops, Manufacturing Plant, Energy &Amp; Mining, Other
Out-of-warranty Service: Video Technical Support, Online Support, Spare Parts
Where To Provide Local Services (in Which Countries Are There Overseas Service Outlets): None
Showroom Location (in Which Countries Are There Sample Rooms Overseas): None
Video Factory Inspection: Provided
Mechanical Test Report: Provided
Marketing Type: Ordinary Product
Place Of Origin: China
Species: Heat Exchanger Tube
Use: Heater Parts
Certification: Ce
Warranty Period: 1 Year
Service System: Free Spare Parts, Video Technical Support, Online Support
Packaging: wooden box
Productivity: TBD
Transportation: Ocean,Air,Express
Place of Origin: China
Supply Ability: TBD
Certificate: ISO90001
HS Code: 8402900000
Port: Shanghai,Ningbo Port,Qingdao Port
Payment Type: T/T
Incoterm: FOB,EXW
Like welded spiral finned tubes, this welded configuration can be used for practically any heat transfer application. The choice of Longitudinal Fin Tube versus helical finned tube seems to be governed mainly by geometric considerations. For example, some heater configurations consist of finned tubes inserted inside other tubes — longitudinal finned tubes are the obvious choice for such applications. In other cases, users prefer longitudinal Fin Tube for installations where the tube will be oriented in a vertical direction — the fin orientation facilitates fluid drainage on the fin side of the tube. The longitudinal fin configuration is most commonly used in shell and tube type applications such as in double-pipe and multi-pipe heat exchangers where the longitudinal fin tube is telescoped inside the bore of a larger tube shell. Heat is transferred between the fluid passing through the bore of the fin tube and the fluid passing through the bore of the shell. Fluids passing through the bore of the shell are forced between the longitudinal fins. In this case, a helical fin would block the flow of the fluid, rather than allowing the fluid to run between the fins.
FABRICATION PROCESS
Longitudinal Finned Tubes are produced by resistance welding fins in the longitudinal direction along the length of the tube(Welded Steel Pipe). The fin strip is first formed into a U-shaped channel, such that each leg of the U will form a fin. The channels are cut to the appropriate length and then oriented along the length of the tube(Brown Fin Tube) and resistance welded in place. The channels are welded in pairs, diametrically opposed- therefore the number of fins specified must always be a multiple of four.
For a given pipe(Carbon Steel Welded Pipe) or tube size, the desired heat transfer surface area per unit length of tube can be obtained by specifying the appropriate fin height and number of fins. The maximum number of fins is dependent upon the tube outside diameter — larger OD tube can accommodate a greater number of fins.
| Product Specification | |||
| Tube O.D.: | 12~273 (mm) | 3/8”~10”(NPS) | |
| Tube Wall Thk.: | 2.11~25.4(mm) | 0.08”~1” | |
| Tube Length: | ≤12000 (mm) | ≤39 ft | |
| Fin Thk.: | 1.0~1.5 (mm) | 0.04”~0.06” | |
| Fin Height: | 5~25 (mm) | 0.2”~0.98” | |
| Fin Qty: | 1U~36U | 1U~36U | |
| Fin Type: | “U" | ||
| Material | |||
| Fin Material: | Ø | C.S. (most common grade: Q235B) | |
| Ø | S.S. (most common grade are AISI 304, 316, 409, 410, 321,347) | ||
| Ø | A.S. | ||
| Tube Material: | Ø | C.S. (most common grade: A106 Gr.B) | |
| Ø | S.S. (most common grade are TP304,316, 321, 347) | ||
| Ø | A.S. (most common grade are T/P5,9,11,22,91) | ||
Product Categories : Longitudinal Finned Tube
Welding Process
Longitudinal Finned Tubes are produced by resistance welding fins in the longitudinal direction along the length of the tube. The fin strip is first formed into a U-shaped channel, such that each leg of the U will form a fin. The channels are cut to the appropriate length and then oriented along the length of the tube and resistance welded in place. The channels are welded in pairs, diametrically opposed- therefore the number of fins specified must always be a multiple of four.
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 and number of fins. The maximum number of fins is dependent upon the tube outside diameter — larger OD tube can accommodate a greater number of fins.
Surface Treatment and Protection
Each tube except stainless material will be polished by polishing machine to near white condition before welding. After welding, the finned tubes will be coated for transportation and site storage purpose, normally the coat will provide a period of 3 months prevention, any other coating material for longer prevention is also available as per clients, requirements.
Frequently Asked Questions (FAQ) About Longitudinal Finned Tubes:
1. What Are Finned Tubes Uses?
Finned tubes are particularly useful in the case of air heat exchangers. In an air heat exchanger, the heat transfer is to take place between a liquid and gas. With the heat coefficient of the air side being lower, a finned tube can be exceptionally helpful. A finned tube increases the surface area and thus helps in faster heat transfer between the components.
2. How is fin height calculated?
Length of fin calculator uses Fin length = (Perimeter-(2*Height))/((4*Number of fins)) to calculate the Fin length, The Length of fin formula is defined as the length of the fins required for the effective heat transfer.
3. What is a longitudinal finned Tube?
Longitudinal Finned Tube also called Brown Fintube , which produces by high frequency resistance welding fins in the longitudinal direction with the length of the tubes.
4. What are properties of longitudinal finned tubes?
Improve heat transfer efficiency in efficient space.
Reduces installation space on required heat transfer surfaces.
Reduce the cost of the equipment, and have a high operational reliability.
The pressure drop on the side of the tube is reduced and the operation cost is reduced.
The stiffness of steel tube is improved, and the seismic performance of steel tube is improved.
Enhance heat transfer, reduce flow resistance and metal consumption.
5. What are applications of longitudinal finned tubes?
We supply longitudinal finned tubes for:
double pipe heat exchangers
multi-tube heat exchangers
fire rated heaters
gas coolers
tank heaters
And we are able to accommodate the requirements of various industries, including oil, power, chemical, and petrochemical.
6. How do you control your quality?
We always put quality as the most important thing for customers, and we control the quality from raw material inspection, production checking to water pressure test and strength test. Also the third party can be authorized to check.
Incoming inspection report for bare tube & strip.
Mill test certification for bare tube
Mill test certification for fin
Mill test certification for finned tube
Finned tubes dimension & visual inspection reports
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