Yuhong Group has been operating stainless steel/duplex/nickel
seamless pipes and finned tube for more than 30 years, with annual
sales of more than 80,000 tons of stainless steel/duplex/nickel
seamless pipes. Our clients have covered more than 45 countries.
Our stainless steel seamless pipes are widely used in mining,
energy, petrochemical, chemical, food mills, paper mills, gas and
fluid industries and more. ANSI B16.10: B16.19 SCH 5S, SCH 10S, SCH
20, SCH 30, SCH 40S, SCH 60, SCH80S, XS, SCH 100, SCH 120, SCH160,
XXS.
Extruded finned tubes are bimetallic tubes whose outer aluminium surface is finned by cold
plastic deformation.
Helical solid finned tubes are made by helically wrapping a
continuous strip of fins around the tube. High frequency resistance
welding typically uses a frequency of 400 kHz. The fins are wrapped
around the tube and welded continuously. The fin tape is helically
wound on the tube and continuously welded to the base tube along
the root of the helix by a high frequency electrical process. The
fin strips are held under tension and laterally constrained as they
are formed around the tube, ensuring firm contact between the fin
strips and the surface of the base tube. Using the gas metal arc
welding process, the continuous welding is made at the point where
the fin strip first begins to bend around the diameter of the pipe.
Chemical Requirements | Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | 304 | min. max. | - 0.08 | - 2 | - 0.75 | - 0.045 | - 0.03 | 18 20 | | 8 11 | |
|
Mechanical Properties |
---|
Y.S.(MPa) | T.S.(MPa) | EL(%) | HRB |
291/290 | 696/698 | 56/55 | / |
Technical Details / Base Tube Details / Fin Details
Pipe Diameter: Min. OD 20 mm to max. Outer diameter 219 mm.
Tube Thickness: Min. 2 mm to 16 mm
Pipe materials: stainless steel, alloy steel, carbon steel,
weathering steel, duplex steel, super duplex steel, Inconel, high
chromium and high nickel and some materials such as Incolloy, CK 20
materials.
Fin detail
Fin Thickness: Min. 0.8 mm to max. 4 mm
Fin Height: Min. 0.25" (6.35mm) to Max. 1.5" (38mm)
Fin Density: Minimum 43 fins per meter, maximum. 287 fins per meter
Materials: Carbon Steel, Stainless Steel, Alloy Steel, Weathering
Steel, Duplex Steel and Incolloy.
If you need a quick quote, please send as follows:
1. The number of pieces,
2. Base pipe: (1) diameter, (2) thickness, (3) length and (4)
material specification.
3. Fins: (1) material specification, (2) type (solid or serrated),
(3) height, (4) thickness, (5) pitch, (5) fin length and (6) no
fins section.
If necessary, weld preparation details.
4. Expected delivery date.