YUHONG HOLDING GROUP CO., LTD
| Payment Terms | L/C, T/T |
| Supply Ability | 100 tons/month |
| Delivery Time | 20-60 days |
| Packaging Details | Ply-wooden Case |
| Product | U Return Bend Tube / 180° Elbow |
| Material | Carbon Steel |
| Standard | ASTM A179 |
| Grade | A179 |
| Use | U bend finnd tubes |
| Packing | Ply-wooden Case |
| Brand Name | YUHONG |
| Model Number | ASTM A179 |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015 |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | 100 tons/month |
| Delivery Time | 20-60 days | Packaging Details | Ply-wooden Case |
| Product | U Return Bend Tube / 180° Elbow | Material | Carbon Steel |
| Standard | ASTM A179 | Grade | A179 |
| Use | U bend finnd tubes | Packing | Ply-wooden Case |
| Brand Name | YUHONG | Model Number | ASTM A179 |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015 | Place of Origin | CHINA |
| High Light | 180 Degree Elbow Return Bend ，Carbon Steel Return Bend ，ASTM A179 Return Bend | ||
U Return Bend 180 Degree Elbow Carbon Steel ASTM A179 For Bend Finned Tubes
The return bend in finned tubes is a crucial component in heat exchanger systems, particularly in applications like air-cooled heat exchangers (ACHEs), boilers, and economizers. It allows the tubing to make a 180-degree turn, enabling continuous flow within a multi-row or multi-pass configuration.
A179 refers to a low-carbon steel tube material specification (ASTM A179/A179M) commonly used in heat exchangers and condenser applications. When used in finned tubes with return bends, these components are typically found in air-cooled heat exchangers, boilers, and other thermal systems.
Chemical Composition (%)
| Grade | C | Mn | P | S |
| A179 | 0.06-0.18 | 0.27-0.63 | 0.035 | 0.035 |
Mechanical Properties Low-carbon steel (similar to A192 but with tighter tolerances).
| Grade | Tensile Strength,min | Yield Strength (0.2%Offset,min) |
| A179 | 47ksi (325 MPa) | 26ksi (180 MPa) |
Key Characteristics:
Excellent thermal conductivity
Good weldability and formability
Suitable for low to medium-pressure applications
Often used in bare or finned tubes for condensers and heat exchangers
Return Bend Function:
Connects two finned tubes to form a continuous flow path;
Ensures efficient heat transfer by maintaining fluid circulation.
Return Bend Design Considerations
Bend Radius:
Typically short-radius (1xD) or long-radius (1.5xD) depending on flow requirements.
Fin Attachment:
Fins are usually extruded, embedded, or welded on straight sections.
The return bend itself is often left unfinned (bare) for ease of manufacturing.
Connection Methods:
Welded return bends (common for high-integrity applications).
Mechanical (press-fit or threaded) connections for easier maintenance.
Applications
Condensers & Heat Exchangers (e.g., power plants, refineries)
Boiler Economizers
HVAC & Refrigeration Systems
Industrial Process Heating/Cooling
Company Details
Business Type:
Manufacturer,Importer,Exporter,Trading Company,Seller,Other
Year Established:
1990
Total Annual:
50M-70M
Employee Number:
50~800
Ecer Certification：
Verified Supplier
Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n... Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n...
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