This range of ductile iron elbow pipe fittings is designed to change the flow direction within pipeline systems and is widely used in water supply, drainage, and industrial piping projects.

The product line includes several common configurations. 90-degree elbows are used for right-angle pipeline connections and are available with flange, socket, or restrained joint connections. 45-degree elbows provide smoother directional changes, helping to minimize flow resistance and pressure loss. For projects with special installation requirements, custom-angle elbows such as 30° and 60° can also be manufactured. In addition, flange-to-socket elbows are available to connect different types of piping systems efficiently.

All fittings are manufactured from QT450-10 ductile iron, offering excellent strength, durability, and impact resistance. To enhance corrosion protection and extend service life, the fittings can be supplied with epoxy powder coating, bitumen coating, or other protective finishes in blue, black, or customized colors.

The series covers sizes from DN50 to DN1200 and is available in pressure ratings of PN10, PN16, and PN25, making it suitable for a wide range of municipal, industrial, and infrastructure applications.

Parameters

Material	Ductile iron
Size	DN50-DN2000
Connectivity	Flange
Technic	casting
Country of origin	Hebei, China
Certificate	ISO 9001/14001/45001;CE
Support customization	OEM / ODM / OBM available

Coating

a) Internal and external FBE (fusion bonded epoxy) coating or epoxy paint

b) Internal and external epoxy paint coating

c) Internal and external black bitumen coating

Key Features

High-strength material

Manufactured from ductile iron with a tensile strength ≥450 MPa and a yield strength ≥310 MPa, providing much higher impact resistance than gray cast iron.

Optimized flow channel design

The elbow is designed with a smooth internal curve that helps maintain steady flow, reducing pressure loss and minimizing noise during operation.

Multiple connection options

Offers multiple connection types, including flange, socket, and clamp connections, for easy integration into different piping systems.

Excellent corrosion resistance

The epoxy coating offers strong adhesion and effective resistance to acids, alkalis, and soil corrosion, making it suitable for underground and humid conditions while improving service life.

Standardized production

Designed and manufactured according to GB/T 13295 and ISO 2531 requirements, with precise sizing, stable quality, and reliable compatibility.

Advantages

High Durability

Manufactured from high-strength ductile iron and protected by a corrosion-resistant coating, the elbow is built to perform reliably in demanding environments and offers a long service life.

Improved Flow Efficiency

The smooth internal surface and optimized bend design help maintain steady flow, reducing pressure loss and improving overall pipeline efficiency.

Quick and Convenient Installation

Available with flange and socket connection options, allowing for fast installation with minimal site work and reduced labor requirements.

Excellent System Compatibility

Suitable for use with a wide range of piping materials, including steel, ductile iron, and PE pipes, making it easy to integrate into existing networks.

Reliable Performance

Produced as a single-piece casting without welded joints, helping to minimize leakage risks and ensure stable operation over the long term.

Application Scenarios

Building water supply and drainage systems

Redirection of indoor and outdoor pipelines in residential areas and commercial buildings, and corners in fire protection pipelines.

Industrial fluid transportation

Redirection of cooling water and process media pipelines in chemical, power, and metallurgical industries.

Sponge city construction

Pipeline redirection and flow control in rainwater collection and storage systems.

Rural drinking water safety projects

curved connections and household connections in village and town water supply networks.

Maintenance Procedures

1. Inspect Seals on a Regular Basis
For flanged connections, check the condition of gaskets during routine maintenance. For socket-type joints, inspect rubber seals for signs of wear, deformation, or aging, and replace them if needed to maintain a reliable seal.

2. Maintain the Protective Coating
Any scratches, peeling, or coating damage should be addressed as soon as possible. Clean the affected area thoroughly and reapply a suitable anti-corrosion coating to prevent rust from spreading.

3. Prevent Build-Up Inside the Pipe
Sediment, scale, and other deposits can gradually reduce flow efficiency. Periodic internal inspections and cleaning will help keep the pipeline operating smoothly.

4. Check Connection Hardware
For flanged installations, inspect bolts and fasteners periodically to ensure they remain secure. Tightening loose components in time can help prevent leakage and maintain system stability.

5. Pay Attention to Buried Service Conditions
When elbows are installed underground, monitor surrounding soil conditions and signs of external corrosion. Additional protection may be considered in aggressive environments to improve long-term durability.

After-Sales Service

Quality Assurance

We manufacture all products in accordance with an ISO 9001 certified quality management system.

Technical Support

We provide installation guidance and selection support, with customized solutions based on specific pipeline requirements.

Fast Response

We provide 24-hour online support through our after-sales team.

Parts Supply

We supply related components such as flange gaskets and bolts to support long-term maintenance requirements.

Company Profile

SND is located in Wu'an Industrial Park, Hebei Province. After years of stable growth, the company has developed into a comprehensive industrial manufacturer covering design, R&D, production, and sales.

SND Foundry has been engaged in the manufacturing and export of manhole covers, gully gratings, valves, pipe fittings, and metal castings for over 10 years.

Our production facilities include two vertical production lines, one horizontal production line, an automatic coating line, shooting core machines, and a hand-molding workshop for large OEM projects. Backed by an in-house design team and experienced technical staff, we are able to provide customers with one-stop service from product development to delivery.

Our products are widely used in railways, highways, airports, schools, public buildings, residential areas, security facilities, and other infrastructure projects. With reliable production equipment, strict process control, and a focus on quality, we have gained long-term trust from customers.

In addition to the domestic market, our products are also exported to India, Singapore, the Middle East, Mexico, the United States, Europe, and other regions worldwide.

FAQ

Q: What factors should you consider when selecting between 90-degree elbows and 45-degree elbows for piping layouts?

A: 90° elbows are used for right-angle turns in compact spaces, while 45° elbows are better suited for long-distance pipelines where smoother direction changes and lower resistance are required.

Q: Can this elbow be used for buried installation?

A: Is this elbow fitting suitable for underground buried pipeline installation?

Q: Which is better: socket connection or flange connection?

A: Socket joints are quicker and more economical to install, making them suitable for small and medium-diameter pipelines, while flange connections provide better sealing performance and easier maintenance, ideal for large-diameter or high-pressure systems.

Q: What are the differences between the different colored coatings?

A: Blue finish uses epoxy resin coating for enhanced corrosion resistance, while black finish uses anti-rust paint, offering a more economical option for dry or low-corrosion environments.

Q: Can the product be customized with special angles?

A: We support customization of non-standard angles such as 30° and 60°, and the MOQ can be discussed based on specific requirements.

Q: What certificate do you have?

A: We have ISO 9001, CE certificate.

Q: Can I get free samples?

A: Yes, The free samples can be offered for free.

Q: Can I have my own Logo on the product?

A: We can provide simple logo design services for orders above a specified quantity.

Q: Can I have my own customized product?

A: Yes, we can customize color, size, markings, and other specifications according to your requirements.

Q: Can you produce the products according to my own drawing?

A: Yes, we can produce the products according to your drawing.

Q: How long is your delivery time?

A: The usual production lead time is around 30–45 days, subject to order size.

Q: What's your product range?

A: Our product range includes forged fittings, butt-weld fittings, pipe clamps, ductile iron grooved fittings, OEM components, valves, and other related pipeline accessories used in various piping systems.

Q: What kinds of OEM parts can you serve?

A: CNC machining parts, bending components, forged parts, stamping parts, and castings, etc.

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