Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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ASTM A106 HF Welding Gr. B Carbon Steel U Bend Fin Tube For Heat Exchanger
YUHONG Group offers ASTM A106 Gr. B HF Welding carbon steel U-Fin Tube.
Welding Fin tube has many types: Sprial High Frequency Welded Finned Tube, Serrated Sprial High Frequency Welded Finned Tube, Studded Tube, H-type And Double H-type Finned Tube
HFW Fin Tube is one of the most widely used spiral finned tubes, and are now widely used in waste heat recovery in electric power, metallurgy, cement industries, and petrochemical industries.
It also called solid type fin tube,use the skin effect and proximity effect of high-frequency current to heat the outer surface of the steel strip and steel pipe while the steel strip is wound around the steel pipe until it is in a plastic state or melted. Complete the welding. This type fin tube can improving heat transfer efficiency much more than bare tube.
This high-frequency welding is actually a solid-phase welding.Due to the tight welding of the fins to the base pipe / tube, these finned tubes are often used in vibrating conditions.
Specifications For Various Types Of Finned Tubes That We Can Offer
| Type | Description | Base tube | Fin specification (mm) | ||
| O.D. (mm) | Fin pitch | Fin height | Fin thick | ||
| Embedded | G-type fin tueb | 16-63 | 2.1~5 | <17 | ~0.4 |
| Extruded | Single metal combined metal | 8-51 | 1.6~10 | <17 | 0.2-0.4 |
| Low fin tube t-type fin tube | 10-38 | 0.6~2 | <1.6 | ~0.3 | |
| Bamboo tube corrugated tube | 16-51 | 8.0~30 | <2.5 | / | |
| Wound | l/kl/ll type fin tube | 16-63 | 2.1~5 | <17 | ~0.4 |
| String | String fin tube | 25-38 | 2.1-3.5 | <20 | 0.2-0.5 |
| U-type | U-type tube | 16-38 | / | / | / |
| Welding | HF-welding fin tube | 16-219 | 3~25 | 5~30 | 0.8-3 |
| H/HH type fin tube | 25-63 | 8~30 | <200 | 1.5-3.5 | |
| Studed fin tube | 25-219 | 8~30 | 5~35 | φ5-20 | |
End: Plain Ends, Beveled Ends
No fin area on both side: As Customer's request and drawing
Material Base Pipe/Tube:
Stainless steel: ASME SA213/ASTM A213, ASME SA249/A249 ,ASME SA312/A312: TP304,304L, TP304H, TP310S, TP310H, TP316L, TP316H, TP316Ti, TP317, TP317L, TP321,TP321H, TP347, TP347H, TP904L
Duplex/Super Duplex Steel: ASME SA789/A789 , ASME SA790/A790: S31803, S32205, S32750, S31500, S32304, S32900
Carbon Steel : ASME SA106/ASTM A106 Gr B, Gr C, ASME SA179/ASTM A179, ASME SA192/ASTM A192, ASTM A214, ASTM A210
Alloy Steel : ASME SA213/ASTM A213 T1, T11, T12, T22, T23, T5, T9, T91, T92 ; ASME SA335 /ASTM A335 P1, P11, P12, P22, P23, P5, P9, etc
Nickel Alloy Steel Grade:Hestalloy:C-276, C-4, C-22, C-2000, X, B-2, B-3, G-30, G-35. Monel:400,401, 404, R-405, K500.
Inconel:600, 601, 617, 625, 690, 718, 740, X-750. Incoloy:800, 800H, 800HT, 825, 840.
Pure Nickel:Ni-200, Ni-201, Ni-270. NS Alloy:Ns 1101, NS1102, NS1103,NS3105. Copper Alloy Steel: ASTM B111(70400, C70600, C71500, C71640, C68700, C44300)
Fin material:
Alloy Steel , Stainless Steel , Carbon Steel .
Detailes Of A106 Gr B Tube
Chemical Composition max %
| Grade | C | Mn | P | S | Si | Cr | Cu | Mo | Ni | V |
| Gr B | 0.3 | 0.29-1.06 | 0.035 | 0.35 | 0.1 | 0.4 | 0.4 | 0.15 | 0.4 | 0.08 |
Mechanical Properties
| Grade | Tensile Strength,min | Yield Strength (0.2%Offset,min) | Elongation |
| Gr B | ksi-66,MPa-415 | psi-35,MPa-240 | 0.3 |
Applications
Heat Exchangers
Boilers
Air Conditioning Systems
Industrial Heaters
Oil and Gas Industry
Power Generation
Refrigeration Systems