ASME SA213 T12 Low Alloy Ferritic Stainless Steel Finned Tube For
High Temperature Heat Exchanger
Yuhong Group has been operating stainless steel/duplex/nickel
seamless pipes for more than 10 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
HFW solid finned tube is the abbreviation of high frequency welded
spiral solid finned tube.
Spiral finned tubes offer designers high thermal efficiency and a
compact design solution for a full range of heat exchangers using
clean flue gas. There are two types of spiral finned tubes: solid
type and serrated type.
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 welded continuously 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 a gas metal arc
welding process, a continuous weld is made at the point where the
fin strip first begins to bend around the pipe diameter.
Chemical Requirements| Grade | UNS Designation | Composition, % |
| | Carbon | Manganese | Phosphorus, max | Sulfur, max | Silicon | Chromium | Molybdenum |
| T2 | K11547 | 0.10-0.20 | 0.30-0.61 | 0.025 | 0.025 | 0.10-0.30 | 0.50-0.81 | 0.44-0.65 |
| T5 | K41545 | 0.15 | 0.30-0.60 | 0.025 | 0.50 | 0.50 | 4.00-6.00 | 0.45-0.65 |
| T9 | K90941 | 0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.25-1.00 | 8.00-10.00 | 0.90-1.10 |
| T11 | K11597 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 |
| T12 | K11562 | 0.05-0.15 | 0.30-0.61 | 0.025 | 0.025 | 0.50 | 0.80-1.25 | 0.44-0.65 |
| T17 | K12047 | 0.15-0.25 | 0.30-0.61 | 0.025 | 0.025 | 0.5 | 0.80-1.25 | 0.44-0.65 |
| T21 | K31545 | 0.05-0.15 | 0..30-0.60 | 0.025 | 0.025 | 0.5-1.00 | 2.65-3.35 | 0.80-1.06 |
| T22 | K21590 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50 | 1.90-2.60 | 0.05-0.30 |
Technical details/base tube details/Fin details
Pipe Diameter: Min. OD 20mm to Max. OD 219mm.
Tube Thickness: Min. 2mm to 16mm
Pipe material: stainless steel, alloy steel, carbon steel, Corten
steel, duplex steel, super duplex steel, Inconel, high chromium
high nickel and some materials such as Incolloy, CK 20 material.
Fin detail
Fin Thickness: Min. 0.8 mm to max. 4 mm
Fin Height: 0.25" (6.35 mm) minimum to 1.5" (38 mm) maximum
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)
finless section .
If necessary, weld preparation details.
4. Desired delivery date.
