| Fin Type: | Low Fin Tube ， Low Finned Tube ， Thread Fin Tube | Fin Height: | <1.6mm |
|---|---|---|---|
| Fin Pitch: | 0.6-2mm | Fin Thickness: | Around 0.3mm |
| Fin Material: | Same As Base Tube (SS，AS，CS，Copper Etc.) | Application: | Air Cooler， Cooling Tower ， Oil Refininging |
| High Light: | power plants Heat Exchanger Finned Tube， A179 Finned Tube， Sa179 Finned Tube | ||
ASTM A179 ASME Sa179 Seamless Steel Finned Tube Finned Tube For Power Plants Heat Exchanger
ASTM A179，ASME SA179 cold-drawn seamless steel tube Chemical Composition
| Material | Chemical Composition(%) | ||||
| C | Si | Mn | P | S | |
| ASTM A179 | 0.06-0.18 | ≤ 0.25 | 0.27-0.63 | ≤0.035 | ≤0.035 |
ASTM A179，ASME SA179 cold-drawn seamless steel tube Mechanical Propertie
| Grade | ASTM A179 |
| Tensile Strength(MPa) | ≥325 |
| Yield Strength(MPa) | ≥180 |
| Elongation，% | ≥35 |
| Hardness， HRB | ≤72 |
Outside Diameter | Wall thickness Tolerance % | |
Over (+) | Under (-) | |
1 ½ (38.1) | 20 | 0 |
Over 1½ (38.1) | 22 | 0 |
ASTM A179，ASME SA179 Tube Outside Diameter Tolerance
Outside Diameter | Permissible Variations In. (mm) | |
Over (+) | Under (-) | |
Under 1 (25.4) | 0.004 (0.1) | 0.004 (0.1) |
1 to 1 ½ (25.4 to 38.1)， Incl | 0.006 (0.15) | 0.006 (0.15) |
Over 11⁄2 to 2 [38.1 to 50.8]， Excl | 0.008 (0.2) | 0.008 (0.2) |
2 to 21⁄2 [50.8 to 63.5]， Excl | 0.010 (0.25) | 0.010 (0.25) |
21⁄2 to 3 [63.5 to 76.2]， Excl | 0.012 (0.3) | 0.012 (0.3) |
ASTM A179，ASME SA179 Length Tolerance
Outside Diameter | Cut Length， in.(mm) | |
In.(mm) | Over (+) | Under (-) |
All Sizes | 3⁄16 [5] | 0 [0] |
Under 2 [50.8] | 1⁄8 [3] | 0 [0] |
2 [50.8] and over | 3⁄16 [5] | 0 [0] |
Under 2 [50.8] | 1⁄8 [3] | 0 [0] |
2 [50.8] and over | 3⁄16 [5] | 0 [0] |
These permissible variations in length apply to tubes before bending. They apply to cut lengths up to and including 24 ft [7.3 m]. For lengths greater than 24 ft [7.3 m]， the above over-tolerances shall be increased by 1⁄8 in. [3 mm] for each 10 ft [3 m] or fraction thereof over 24 ft or 1⁄2 in. [13 mm]， whichever is the lesser. | ||
Feel free to provide the following details for the finned tube offer:
- Base tube material:
- Base tube size (OD x WT x Length):
- Fin material:
- Fin type:
- Fin diameter or height:
- Fin thickness:
- Fins per inch， meter， or fin pitch:
- Length of plain， unfinned ends:
- Finned Tube Quantity:
- Any additional fabrication requirements (e.g.， bending， welding into tubeplate， assembly):
