Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
Add to Cart
Yuhong Group has been dealing in stainless steel/duplex/nickel steel seamless pipes for more than 10 years, with annual sales of more than 80,000 tons of stainless steel/duplex/nickel steel seamless pipes. Our customers have covered more than 45 countries. Our stainless steel seamless pipes and tubes are widely used in mining, energy, petrochemical, chemical, food plants, paper mills, gas and fluid industries, etc. 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 welding spiral solid finned tube
Spiral finned tubes provide designers with high thermal efficiency and compact design solutions, and are suitable for a full range of heat exchangers that use clean flue gas. There are two types of spiral finned tubes: solid type and serrated type.
The spiral solid fin tube is manufactured by spirally winding a continuous fin tape on the tube. High frequency resistance welding usually uses a frequency of 400 kHz. The fins are wound on the tube and continuously welded. The fin belt is spirally wound on the tube, and is continuously welded to the base tube along the root of the spiral through a high-frequency electrical process. The fin strips are held under tension and are laterally restrained as they are formed around the tube, thereby ensuring strong contact between the fin strips and the surface of the base tube. Using the gas metal arc welding process, continuous welding is performed at the point where the fin strip first begins to bend around the pipe diameter.
| Grade | UNS Designation | Composition, % | ||||||
| Carbon | Manganese | Phosphorus, max | Sulfur, max | Silicon | Chromium | Molybdenum | ||
| P1 | K11522 | 0.10-0.20 | 0.30-0.80 | 0.025 | 0.025 | 0.10-0.50 | -- | 0.44-0.65 |
| P2 | 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 |
| P5 | K41545 | 0.15MAX | 0.30-0.60 | 0.025 | 0.025 | 0.50MAX | 4.00-6.00 | 0.45-0.65 |
| P9 | K90941 | 0.15MAX | 0.30-0.60 | 0.025 | 0.025 | 0.25-1.00 | 1.00-1.50 | 0.44-0.65 |
| P11 | 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 |
| P12 | K11562 | 0.05-0.15 | 0.30-0.61 | 0.025 | 0.025 | 0.5MAX | 0.80-1.25 | 0.44-0.65 |
| P15 | K11578 | 0.05-0.15 | 0..30-0.60 | 0.025 | 0.025 | 1.15-1.65 | -- | 0.44-0.65 |
| P21 | K31545 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50MAX | 2.65-3.35 | 0.80-1.06 |
Pipe diameter: minimum outer diameter 20 mm to maximum outer diameter 219 mm.
Tube thickness: minimum 2 mm to 16 mm
Pipe materials: stainless steel, alloy steel, carbon steel, Corten steel, duplex steel, super duplex steel, Inconel, high chromium high nickel and Incolloy, CK 20 materials and some other materials.
Fin details
Fin thickness: minimum. 0.8 mm to max. 4 mm
Fin height: minimum 0.25" (6.35 mm) to maximum 1.5" (38 mm)
Fin density: minimum 43 fins per meter to maximum. 287 fins per meter
Materials: Carbon steel, stainless steel, alloy steel, Corten steel, duplex steel and Incolloy.
If you need a quick quotation, please send as follows:
1.Number of pieces,
2.Base tube: (1)Diameter, (2)Thickness, (3)Length and (4)Material specifications.
3.Fins: (1)Material specification, (2)Type (solid or serrated), (3)Height, (4)Thickness, (5)Spacing, (5)Fin length and (6)Finless section.
If necessary, welding preparation details.
4.The delivery date required.
