Copper flanges play a crucial role in various industries, serving as vital components for pipe connections and assemblies. In China, the demand for copper flanges has surged due to rapid industrial growth and infrastructure development. This guide delves into the intricacies of copper flanges, exploring their types, manufacturing processes, and applications across different sectors.

Readers can expect to gain a comprehensive understanding of the unique properties of copper, its advantages over other materials, and the standards that govern copper flange production in China. Additionally, we will discuss market trends, sourcing strategies, and quality control measures, equipping you with valuable insights for making informed decisions.

Whether you are an industry professional, a supplier, or simply curious about copper flanges, this guide will enhance your knowledge and appreciation of this essential component. Join us as we explore the dynamic landscape of copper flanges in China and uncover the factors that influence their production and use.

A Comprehensive Guide to Copper Flanges

Copper flanges, particularly those made from copper-nickel alloys, play a crucial role in various industries, especially in marine applications. With unique properties that make them resistant to corrosion, these flanges are essential for ensuring the durability and efficiency of piping systems. This guide will provide an in-depth look at copper flanges, including their technical features, types, and applications.

Introduction

Copper-nickel flanges, often referred to as CuNi flanges, are made from copper alloys that contain nickel. These flanges are widely used in shipbuilding, desalination plants, and power generation due to their resistance to seawater corrosion and excellent mechanical properties. In this guide, we will explore the technical specifications of copper flanges, their types, and why they are a preferred choice in many industrial applications.

Technical Features of Copper Flanges

Copper-nickel flanges are known for their exceptional qualities. Below is a comparison table highlighting their key technical features:

Feature	CuNi 90/10	CuNi 70/30
Density (kg/m³)	8900	8900
Electrical Resistivity (μΩ·cm)	19	34
Thermal Conductivity (W/m·K)	50	30
Coefficient of Expansion (C × 10⁻⁶)	17	16
Modulus of Elasticity (MPa)	126,000	126,000
Annealing Temperature (°C)	760 – 800	760 – 820
Melting Interval (°C)	1100 – 1150	1180 – 1240
Tensile Strength (MPa)	> 310	> 350
Proof Stress (MPa)	> 110	> 130
Elongation (%)	> 35	> 30
Hardness (HB)	> 70	> 80

Types of Copper Flanges

There are several types of copper-nickel flanges, each designed for specific applications. The following table outlines the various types and their characteristics:

Flange Type	Description	Applications
Composite Weld Neck Flanges	Made of copper-nickel inner flanges and carbon steel outer flanges.	Shipbuilding, marine applications.
Composite Slip On Flanges	Similar to weld neck but allows for easier installation by slipping over the pipe.	Used in various piping systems.
Copper Nickel Weld Neck Flanges	A traditional flange that is welded directly to the pipe, providing strong connections.	High-pressure applications.
Copper Nickel Slip On Flanges	Flanges that slip over the pipe and are welded, suitable for low-pressure systems.	Common in marine and industrial piping.
Copper Nickel Socket Weld Flanges	Designed for small-diameter piping, offering a robust connection with a single weld.	Used in high-pressure piping.
Copper Nickel Blind Flanges	Solid flanges used to block off pipelines, preventing flow.	Temporary closures in piping systems.
Copper Nickel Threaded Flanges	Feature internal threads for easy connection without welding.	Suitable for non-welded applications.

Applications of Copper Flanges

Copper-nickel flanges are primarily used in marine environments due to their excellent corrosion resistance. They are widely applied in shipbuilding, desalination plants, and power generation facilities. Their resistance to seawater corrosion makes them ideal for underwater piping systems. Additionally, their ability to withstand high pressures and temperatures ensures reliability in critical applications.

Leading Manufacturers

Several companies specialize in the manufacturing of copper-nickel flanges. Notable among them are:
– COPPERRY (copperry.com): With over 20 years of experience, COPPERRY provides a wide range of copper-nickel flanges that meet international standards. They are known for their fast delivery and competitive pricing.
– Hailiang Group (www.hailiang.us): A prominent manufacturer of copper pipes and fittings, Hailiang offers high-quality copper-nickel flanges suitable for various applications, ensuring durability and reliability.
– Shihang (www.shshihang.com): Shihang specializes in copper-nickel flanges and has built a reputation for quality and customer satisfaction. They provide customized solutions based on client specifications.

Conclusion

Copper-nickel flanges are vital components in many industrial applications, particularly in marine and offshore environments. Their unique properties, such as corrosion resistance and high strength, make them the preferred choice for piping systems. Understanding the different types of copper flanges and their applications can help manufacturers and engineers make informed decisions when sourcing these essential components.