Integral finned tubes are developed to increase the heat transfer performance of fluids while reducing the physical size and cost of the heat exchanger.
The fins are rolled out from the wall of the tubes and hence are integral with the tube. As the fins are formed from the base tube by rolling out material from its wall, the wall thickness under the finned section is reduced compared to the wall thickness at plain ends. These fin tubes can be manufactured from most tubular materials and the hardness of the material usually determines the finning code or fin profile. The harder materials such as Nickel Alloys, Stainless Steel, Titanium are supplied with higher density (i.e. 26, 28, 30 FPI). This shallow profile reduces the work hardening of the material and helps to eliminate the possibility of root fin cracking.
Whereas, softer materials like Carbon Steel, Copper, and Copper Alloys are supplied with deeper profile giving a lower fin density (i.e. 16 or 19 FPI). These tubes can also be supplied with intermediate plain landing as well as U bent, where U bend portion can be finned or un-finned.
Dimension and Material
The following table shows Simcan’s manufacturing capabilities:
12.7 to 25.4 (mm)
1/4” to 3/4”(NPS)
Tube Wall Thk.:
1.65 to 3.0 (mm)
0.065” to 0.118”
No practical limit
No practical limit
0.3 to 0.5 (mm)
0.0118” to 0.0197”
0.9 to 1.3 (mm)
0.0354” to 0.0512”
666 to 1111 FPM
16 to 30 FPI
C.S., S.S., A.S., Copper, Titanium
* This table is used as a general guide to our capabilities, please call us for any other customized cases.
Codes and Standards
As per drawings and client’s Requirements
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 with anti-rust oil 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.
Each package is designed and made according to seaworthy packing standard and clients’ handling and lifting capability.
Finned tubes will be packed into steel frameworks and wrapped with weather proof PE film and plywood board covering up. In addition, each row of finned tubes will be isolated from adjacent with plywood bar to prevent rigid impact during transportation. For all exporting packages, we only use plywood instead of wood for fumigation free purpose.
As a professional supplier, Simcan does not only manufactures products but also has full capability on preparing and submitting documents as listed below but not limited to:
Design and Fabrication Schedule
Drawings and data
Inspection and Test Plan (ITP)
Daily, weekly or monthly progress report
A complete set of final archive including
Raw Material Mill Certificates
Product Conformity Certificate
Inspection Reports including Material Receipt Inspection Report, Test Report etc.
Test report by world reputable third party such as TÜV, BV, SGS, Lloyd's, ABS, Intertek(Moody), Shanghai Jorson etc. if any
Packing List and Proforma Invoice
Certificate of Origin or any other documentation mandatory for clients’ customs clearance or tax preference