EN 10255 vs. EN 10305

Attribute	EN 10255	EN 10305
Standard	EN 10255	EN 10305
Scope	Non-alloy steel tubes suitable for welding and threading	Steel tubes for precision applications
Material	Non-alloy steel	Steel
Manufacturing method	Hot finished	Cold drawn or cold rolled
Dimensions	Outer diameter: 21.3mm - 165.1mm, Wall thickness: 2.6mm - 4.5mm	Outer diameter: 6mm - 350mm, Wall thickness: 0.5mm - 20mm

Introduction

EN 10255 and EN 10305 are both European standards that pertain to steel tubes and pipes. While they may seem similar at first glance, there are key differences between the two that are important to understand when selecting the appropriate material for a specific application. In this article, we will compare the attributes of EN 10255 and EN 10305 to help you make an informed decision.

Material Composition

EN 10255 specifies the requirements for hot-dipped galvanized steel tubes suitable for threading, bending, and welding. These tubes are typically used for conveying gas, water, and other fluids. On the other hand, EN 10305 covers seamless cold drawn precision steel tubes for mechanical applications. These tubes are known for their high precision and smooth surface finish, making them ideal for use in automotive and machinery industries.

Size Range

EN 10255 tubes are available in a wide range of sizes, from small diameters suitable for domestic plumbing to larger diameters used in industrial applications. The standard specifies the dimensions and tolerances for these tubes to ensure they meet the required quality standards. In contrast, EN 10305 tubes are typically smaller in diameter and are designed for precision applications where tight tolerances are critical.

Surface Finish

One of the key differences between EN 10255 and EN 10305 is the surface finish of the tubes. EN 10255 tubes have a hot-dipped galvanized finish, which provides excellent corrosion resistance and a durable coating that can withstand harsh environments. On the other hand, EN 10305 tubes have a smooth, polished surface finish that is free from defects and imperfections, making them ideal for applications where aesthetics are important.

Mechanical Properties

EN 10255 and EN 10305 have different mechanical properties due to their intended applications. EN 10255 tubes are designed for general use and have specified minimum tensile and yield strengths to ensure they can withstand the pressures and stresses associated with fluid conveyance. In contrast, EN 10305 tubes have higher precision and tighter tolerances, resulting in superior mechanical properties that are critical for applications where accuracy and consistency are paramount.

Application

EN 10255 tubes are commonly used in a wide range of applications, including plumbing, heating, and ventilation systems. Their hot-dipped galvanized finish makes them suitable for outdoor use and in environments where corrosion resistance is essential. On the other hand, EN 10305 tubes are preferred for precision applications such as automotive components, hydraulic systems, and instrumentation where tight tolerances and high-quality surface finish are required.

Conclusion

In conclusion, while EN 10255 and EN 10305 are both European standards for steel tubes, they serve different purposes and have distinct attributes that make them suitable for specific applications. Understanding the differences between these standards is crucial in selecting the right material for your project. Whether you need a durable, corrosion-resistant tube for general use or a high-precision tube for mechanical applications, EN 10255 and EN 10305 offer a range of options to meet your requirements.