ASTM A179 Seamless Carbon Steel Embedded G Fin Tubes For Waste Heat Boiler Systems
ASTM A179 Seamless Carbon Steel Embedded G Fin Tubes For Waste Heat Boiler Systems
Embedded/G-type finned tubes are high-efficiency heat exchange elements created by mechanically embedding and pressing fins into and fixing them in place through grooves cut into the outer surface of a base tube. The fins are tightly bonded to the base tube, resistant to vibration/thermal cycling, and not easily detached.
Embedded/G-type finned tubes are suitable for medium-temperature (≤450℃), high-pressure, and multi-medium heat exchange applications, and are widely used in industrial heat exchange, waste heat recovery, and HVAC systems.
Advantages
High efficiency: 30%–50% higher heat transfer efficiency than bare tubes, enabling compact designs.
Strong fit: Mechanical insertion ensures no fin detachment under vibration/thermal cycling.
Medium temperature adaptability: Operates up to 450°C, balancing efficiency and cost.
Economy: Long service life and low maintenance costs.
ASTM A179 seamless carbon steel G-type finned tubes are the core high-efficiency heat exchange elements of waste heat boiler systems. Using ASTM A179 cold-drawn seamless low-carbon steel tubes as the base tube, the metal fins are embedded into the spiral G-type grooves on the outside of the tube and locked in place using a mechanical embedding process.
ASTM A179 seamless carbon steel embedded G fin tubes are specifically designed for medium-temperature, high-pressure, dust-laden flue gas waste heat recovery scenarios.
Chemical Composition (%) max
| Grade | C | Mn | P | S |
| A179 | 0.06-0.18 | 0.27-0.63 | 0.035 | 0.035 |
Mechanical Properties
| Grade | Tensile Strength min | Yield Strength min | Elongation in 2" or 50mm min |
| A179 | 47ksi (325 MPa) | 26ksi (180 MPa) | 35% |
Key Application Industries
Power & Energy
Boiler systems: Economizers, air preheaters, waste heat boilers, and steam air heaters
Waste heat recovery: Coal/biomass/waste incineration boilers and HRSG heat transfer elements
Nuclear & thermal power
Petrochemical & Natural Gas
Process heat exchange: Air coolers, condensers, reboilers,and oil coolers
Gas processing: Natural gas compression cooling
Refining & chemical: Reactor cooling, distillation tower condensers, and corrosive medium heat exchangers
HVAC & Refrigeration
Commercial/industrial AC: Condensers, evaporators, chillers, and heat pump bundles
Refrigeration systems: Ammonia/Freon/propane refrigeration, cold storage coolers, and equipment
Heating: Central heating radiators, industrial air heaters
Advantages
1.Cost-effective
2.Environment Protection
3.Energy Conservation
4.Highly Efficient
Estimated Specifications For Various Types Of Finned Tubes We Can Do
| Type | Description | Base tube | Fin specification (mm) | ||
| O.D. (mm) | Fin pitch | Fin height | Fin thick | ||
| Embedded | G-type fin tube | 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 | ~0.3 | |
| Wound | L / KL / LL fin type | 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 fin 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 | 5~20 | |
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.