| 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 |
Manufacturing Process of ASTM A179 Finned Tube
Fin strips (usually aluminum and copper) are folded into an L shape and wound under tension on the surface of the base tube. The feet of the fins are connected together and cover the surface of the fins.
ASTM A179 Finned Tube is combined with two different materials
Core tube material: A179
Fin material: aluminum, copper, steel
1. Aluminum (Alu.1100, Alu.1060)
2. Copper.
3. Steel
Quality Control of STM A179 Finned Tube
Inspection and Tests Performed
Chemical Composition inspection,
Mechanical Properties Test(Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Hardness, Impact Test), S
surface and Dimension Test,
No-destructive Test,
Hydrostatic Test.
Delivery conditions
The tube ends are square cut without burrs, the inside is dry and blown clean, and the ends of the L-shaped tension wound finned tube are coated with varnish on the outside.
Acceptance Criteria
API Standard 661 (Air-Cooled Heat Exchangers for General Refinery Service) or Delivery Conditions (TDC).
Features of STM A179 Finned Tube for Heat Exchanger
1. Anti-corrosion
2. Anti-wear
2. lower contact resistance
4.Higher Stability
5. Anti-fouling ability
Application
1. Highly corrosive systems (condenser, evaporator, desalination, fertilization, urea system, ammonia, gas, corrosive acid);
2. Air coolers in petrochemical, electric power, paper, tobacco, building heating and other industries;
3. Air heaters and air heaters for spray drying systems such as vegetable protein powder and starch in the food industry;
4. Heat exchanger installations in power plants (electrical, nuclear, thermal and geothermal power plants).
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