YUHONG HOLDING GROUP CO., LTD
| Payment Terms | T/T, L/C AT SIGHT |
| Supply Ability | According to Clients' requirements |
| Delivery Time | Generally within 30 Days |
| Packaging Details | Ply-wooden Cases/Pallets |
| Product Name | 180 Degree Return Bend |
| Specification | ASTM A234 |
| Material | WP11-S |
| Radius | LR or SR (Depend on Customer's Requirements) |
| Surface | Black Painted or Oiled |
| Test | Size Inspection, Visual Inspection, NDE Test... |
| Size Standard | ASME B16.9 |
| Application | Heat Exchangers, Piping Systems, Oil and Gas Industry, Water Tretment |
| Brand Name | YuHong |
| Model Number | ASTM A234 WP11-S 180 Degree U Bend |
| Certification | ISO,PED, TUV, ABS, DNV, GL , LR , KR, BV, CCS, COST |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T, L/C AT SIGHT | Supply Ability | According to Clients' requirements |
| Delivery Time | Generally within 30 Days | Packaging Details | Ply-wooden Cases/Pallets |
| Product Name | 180 Degree Return Bend | Specification | ASTM A234 |
| Material | WP11-S | Radius | LR or SR (Depend on Customer's Requirements) |
| Surface | Black Painted or Oiled | Test | Size Inspection, Visual Inspection, NDE Test... |
| Size Standard | ASME B16.9 | Application | Heat Exchangers, Piping Systems, Oil and Gas Industry, Water Tretment |
| Brand Name | YuHong | Model Number | ASTM A234 WP11-S 180 Degree U Bend |
| Certification | ISO,PED, TUV, ABS, DNV, GL , LR , KR, BV, CCS, COST | Place of Origin | China |
| High Light | A234 180 degree u bend ，ASTM 180 degree u bend ，WP11-S 180 bend pipe | ||
ASTM A234 WP11-S 180 Degree U Bend For High Temperature and Pressure Application
A 180-degree U-bend is a pipe fitting that curves back on itself in a semi-circular or U-shaped pattern, changing the flow direction by 180 degrees. It is commonly used in piping systems where space constraints or thermal expansion management require a tight directional reversal.
Key Features of a 180° U-Bend:
1. Shape & Geometry
-Forms a complete half-circle (U-shape).
-Bend Radius (R): Specified as a multiple of the pipe diameter (e.g., 1.5D, 2D, 3D, where D = pipe diameter).
Example: A 2D bend on a 6-inch pipe has a 12-inch centerline radius.
2. Types of U-Bends
-Short Radius (1D): Tightest bend, used where space is limited.
-Long Radius (1.5D or more): Smoother flow, less pressure drop.
-Custom Radii: Engineered for specific applications.
3. Manufacturing Methods
-Hot Induction Bending: Heated and bent for thick-walled pipes.
-Cold Bending: Used for smaller pipes with thinner walls.
-Mandrel Bending: Ensures smooth interior without wrinkles.
4. Materials
-Carbon steel (e.g., ASTM A234 WPB)
-Alloy steel (e.g., ASTM A234 WP11, WP22)
-Stainless steel (e.g., ASTM A403 WP316)
-Nickel alloys (e.g., Inconel, Monel)
5. End Connections
-Plain Ends (PE): For welding.
-Beveled Ends (BE): Prepared for butt welding.
-Threaded Ends (TE): For screw connections.
Why Use a 180° U-Bend Instead of Two 90° Bends?
ASTM A234 WP11 Chemical Composition (%)
| Element | WP11 Class 1 | WP11 Class 2 | WP11 Class 3 |
| Carbon (C) | 0.05–0.15 | 0.05–0.20 | 0.05–0.20 |
| Manganese (Mn) | 0.30–0.60 | 0.30–0.80 | 0.30–0.80 |
| Phosphorus (P) | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| Silicon (Si) | 0.50–1.00 | 0.50–1.00 | 0.50–1.00 |
| Chromium (Cr) | 1.00–1.50 | 1.00–1.50 | 1.00–1.50 |
| Molybdenum (Mo) | 0.44–0.65 | 0.44–0.65 | 0.44–0.65 |
| Nickel (Ni) | ≤ 0.50 | ≤ 0.50 | ≤ 0.50 |
| Vanadium (V) | - | - | ≤ 0.03 |
| Columbium (Cb) | - | - | ≤ 0.08 |
ASTM A234 WP11 Mechanical Properties
| Property | WP11 Class 1 | WP11 Class 2 | WP11 Class 3 |
| Tensile Strength (MPa) | ≥ 415 | ≥ 485 | ≥ 485 |
| Yield Strength (MPa) | ≥ 205 | ≥ 275 | ≥ 275 |
| Elongation (%) (min) | 20 | 20 | 20 |
| Hardness (HB) (max) | 197 | 197 | 197 |
Notes:
Applications of A234 WP11-S 180° U-Bend
1. Power Plants
Used in boiler systems, steam lines, and heat exchangers due to its high-temperature resistance.
Suitable for thermal expansion loops to absorb pipe stress.
2. Oil & Gas Refineries
Employed in crude oil processing, petrochemical pipelines, and high-pressure gas lines where corrosion resistance is critical.
3. Chemical Processing Plants
Resists sulfur compounds, acidic, and alkaline environments (thanks to chromium-molybdenum alloy).
4. High-Temperature Steam Systems
Used in steam distribution networks (up to 593°C / 1100°F for WP11).
5. Heating & Cooling Systems
Functions in heat recovery systems, condensers, and district heating pipelines.
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. The factories ... 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. The factories ...
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