Epoxy Painted Bitumen Painted Ductile Iron Double Socket Bend Pipe Fitting
Brand TOPSUN
Product origin China
Delivery time 30 days
Supply capacity 10,000 tons per year
Our epoxy and bitumen painted ductile iron double socket bend is engineered for demanding pipeline systems, particularly in water supply, sewage transport, and industrial fluid conveyance. This robust fitting excels in corrosive environments, including underground burial and marine applications, ensuring long-term structural integrity and reliable flow direction change. With a proven track record, it has been successfully implemented in municipal water projects and mining slurry transport lines, demonstrating superior performance under high pressure and abrasive conditions.
Advanced manufacturing techniques underpin this product, featuring a dual-layer coating system where the fusion-bonded epoxy (FBE) provides exceptional corrosion resistance and the bitumen overcoat offers superior mechanical protection against abrasion and soil stress. Our production leverages automated casting and quality control processes, including spectroscopic material analysis, to guarantee consistent wall thickness, pressure rating, and coating adhesion that meet international standards such as ISO 2531 and EN 545.
Supported by significant production capacity, we maintain a substantial inventory of various bend angles (e.g., 45°, 90°, 22.5°) and diameters to ensure prompt delivery for urgent project needs. Our global sales network has supplied millions of these units to infrastructure projects across five continents, reflecting high market trust. We welcome OEM cooperation and customization to meet specific project specifications, ensuring a perfect fit for your pipeline system requirements.

Joint Type | Flange, Tyton joint(push on joint); Bolted Gland K type Joint | |||
Standard | ISO2531, BS EN545, EN598, BS4772, etc | |||
Specification | DN50 to DN2000, K12/14 | |||
Material | Ductile Cast Iron GGG50 | |||
Pressure | PN10, PN16, PN25 | |||
Application | Water supply project, drainage, irrigation, water pipeline system. | |||
Surface Inside | Portland Cement mortar lining, bitumen paint, epoxy paint, powder | |||
Surface Outside | Epoxy paint, bitumen paint, epoxy powder coating | |||
Accessories | Gaskets, bolts and nuts available upon request | |||
Ductile iron double socket bend is engineered for superior performance and longevity in demanding pipeline applications. Its primary features are derived from advanced material science and protective coating technology.
Manufactured from high-strength ductile iron, the fitting offers an exceptional balance of toughness and ductility, providing high impact and pressure resistance while mitigating the brittleness of traditional cast iron. The unique double socket design facilitates straightforward and secure assembly, allowing for easy angular deflection to navigate underground obstacles and changes in pipeline direction without the need for complex fabrication.
The dual-layer corrosion protection system is a critical feature. The interior is lined with a smooth, fusion-bonded epoxy coating that ensures excellent flow characteristics, minimizes scaling, and protects against aggressive fluids. Externally, a robust bitumen paint coating acts as a durable, sacrificial barrier, effectively shielding the iron from corrosive soil conditions and electrochemical attack.
These combined features result in a reliable, maintenance-free fitting with an extended service life, making it an ideal choice for potable water transmission, sewer force mains, and industrial applications where durability and corrosion resistance are paramount.
This robust pipe fitting is engineered for critical infrastructure applications where durability, corrosion resistance, and the ability to change pipeline direction are essential. Its primary use is in underground pressurized networks for potable water distribution and sewage force mains. The epoxy interior lining ensures water quality is maintained by preventing biofilm growth and resisting tuberculation, while the external bitumen coating provides excellent protection against a wide range of corrosive soils.
The double socket bend design is particularly valuable for navigating around existing utilities, natural obstacles, and conforming to challenging terrain without requiring custom-made fittings. This makes it a preferred choice for municipal water and wastewater projects, industrial plant piping, and mining slurry transport systems. Its high strength and impact resistance also make it suitable for installations in unstable ground or areas with high traffic loading.
Furthermore, these bends are extensively used in fire water supply lines, irrigation schemes, and pipeline rehabilitation projects. The combination of reliable deflection capability and superior corrosion protection ensures a long service life with minimal maintenance, delivering dependable performance in some of the most demanding underground environments.


This Ductile Iron Double Socket Bend is a high-performance pipe fitting engineered for durability, reliability, and long-term service in demanding pipeline systems. Manufactured from high-grade ductile iron, it possesses superior mechanical strength and impact resistance compared to traditional cast iron, offering excellent load-bearing capacity and resilience against ground movements and pressure surges.
The defining feature of this bend is its comprehensive corrosion protection system. The interior surface is coated with a fusion-bonded epoxy (FBE) paint. This coating creates a smooth, inert barrier that minimizes friction loss, prevents scaling, and ensures the quality of the conveyed fluid, making it ideal for potable water. Externally, the fitting is protected by a thick, resilient layer of bitumen paint. This proven coating acts as a robust shield against a wide spectrum of corrosive soil conditions and electrochemical degradation, significantly extending the asset's service life underground.
Functionally, the "Double Socket Bend" design features two socket ends, facilitating a straightforward and secure push-fit assembly with corresponding spigot-ended pipes. This design allows for a predefined angular deflection, providing the flexibility to navigate obstacles, follow contour changes, and manage directional adjustments in pipeline routes without the need for complex and costly field fabrication.
Combining the strength of ductile iron, the fluid integrity of an epoxy lining, and the underground durability of a bitumen exterior, this socket bend is an indispensable component for municipal water supply, wastewater force mains, industrial processing lines, and other critical infrastructure projects where longevity and performance are paramount.
CUSTOMERS & MARKET

Q: What's your qualification in this product ?
A: We have been engaged in this industry for decades with seasoned export team. All the product is strictly conformed to the international standard ISO2531:1998,EN545-2002 and other related standard.
Q: How long is your delivery time ?
A: Generally it is 5-10 days if the goods are in stock. or it is 20-30 days if the goods are not in stock, it is according to quantity.
Q: What's your terms of payment ?
A: 30% T/T in advance , balance before shipment or against L/C . And D/P , D/A ,L/C for free options.
Q: What's your trade terms ?
A: FOB , CIF , CFR as per client's requirements.
If you have any other questions , please feel free to contact us.








