Product Overview
Large-diameter bends are specialized directional pipe fittings for pipeline systems with a nominal diameter of DN200 and above. Manufactured by the company's professional steel pipe bending technology, the products have a maximum processing diameter of DN2200, bending radii covering 3D to 10D, and can be custom-made to any angle according to engineering requirements. Compared with welded elbows, the bends can reduce on-site welding joints by more than 50%, effectively reducing the potential risks of welding parts and further enhancing the overall operational reliability of the pipeline system. Complying with multiple national and industrial standards, the products have been officially applied to a number of national key pipeline projects and become a key supporting product of Hebei Haihao in the field of large-scale pipeline engineering.
Large Diameter Bend
DIMENSIONS
| Nominal Size DN | Pipe outside diameter (D) | Bend Radius (R) | Wall thickness (t) | Angle of Bend (A) | Straight pipe section length (L) | |
| Ⅰ | Ⅱ | |||||
| 600 | 610 | 630 | R=3D~10D | 5-60mm | ≤90 | Per customer specifications |
| 650 | 660 | R=3D~8D | ||||
| 700 | 711 | 720 | R=3D~8D | |||
| 750 | 762 | R=3D~8D | ||||
| 800 | 813 | 820 | R=3D~8D | |||
| 850 | 864 | R=3D~8D | ||||
| 900 | 914 | 920 | R=3D~8D | |||
| 950 | 965 | R=3D~8D | ||||
| 1000 | 1016 | 1020 | R=3D~8D | |||
| 1050 | 1067 | R=3D~8D | ||||
| 1100 | 1118 | 1120 | R=3D~8D | |||
| 1150 | 1168 | R=3D~8D | ||||
| 1200 | 1219 | 1220 | R=3D~8D | |||
| 1250 | 1270 | R=3D~6D | ||||
| 1300 | 1320.8 | R=3D~6D | ||||
| 1350 | 1371.6 | R=3D~6D | ||||
| 1400 | 1422.4 | R=3D~6D | ||||
| 1450 | 1473.2 | R=3D~6D | ||||
| 1500 | 1524 | R=3D~6D | ||||
| 1600 | 1625.6 | R=3D~6D | ||||
| 1800 | 1828.8 | R=3D~6D | ||||
| 2000 | 2032 | R=3D~6D | ||||
Advantages
Wide large-diameter processing coverage
The maximum processing diameter of Hebei Haihao's large-diameter bends reaches DN2200, which can fully meet the supporting needs of long-distance oil and gas transmission pipelines and large-scale industrial project pipelines.
Low medium flow resistance with long-radius design
The bending radius of the large diameter bends is ≥3D, which can effectively reduce the flow resistance of the medium in the pipeline and minimize the pressure loss during medium transportation.
Customizable bending angle with strong adaptability
Supports customized processing of angles from 15° to 180°, which can perfectly adapt to the pipeline layout and direction requirements of complex terrain and industrial site processes.
Parameters
- Wall Thickness Schedule: Sch10, Sch20, STD, Sch40, Sch80, Sch160, XXS.
- Bend Radius: R=1.5D (Short Radius), R=3D, 5D, 6D, 8D, 10D (Long Radius) or customized according to engineering drawings.
- Bend Angle: 15°, 30°, 45°, 60°, 90°, 180°, and any non-standard angles.
- Execution Standards: GB/T 12459, GB/T 13401, ASME B16.9, SY/T 5257, SH 3408, HG/T 21635.
Company Services
Hebei Haihao provides core supporting services for large-diameter bends from pre-sales technical docking to post-delivery on-site support: pre-sales professional team cooperates in design surveying, on-site measurement and parameter calculation to determine accurate bending parameters; single-piece customization is available for non-standard requirements without mold opening, shortening the production cycle of customized products; extra-long bent tubes are reinforced with anti-collision and anti-deformation treatment before shipment, and special transportation is coordinated to ensure damage-free delivery; a complete process-traceable quality report is provided upon arrival, and on-site technical briefing and problem-solving assistance are offered by professional technicians.
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