EN10255 Pipe

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EN 10255 is a European standard for non-alloy steel pipes suitable for welding and thread processing, mainly applied in low-pressure fluid conveying systems in the construction and industrial fields. The following table can help you quickly understand its core specification overview.

• Dimensions and tolerances:

The standard has strict allowable deviation regulations for the outer diameter, wall thickness and straightness of steel pipes. For instance, the outer diameter tolerance usually needs to be controlled within ±0.75% to ensure the sealing of pipe connections and the convenience of construction.

• Materials and Properties:

The standard requires that the steel pipes be made of non-alloy steel, and the common steel grade is S195T. Its chemical composition is characterized by a low-carbon design, which ensures excellent welding and threading performance. In terms of mechanical properties, the yield strength is required to be no less than 195 MPa, the tensile strength between 320 and 520 MPa, and the elongation is usually required to be no less than 20%.

• Surface treatment and pipe end form:

Pipes can undergo different surface treatments as required, such as black pipe, oil coating, hot-dip galvanizing, etc., to enhance corrosion resistance. The pipe ends can also be processed into various forms such as flat ends, threaded or with socket and spigot joints, to adapt to different connection methods such as welding and threaded connection.

When choosing and using EN 10255 steel pipes in actual projects, the following aspects can be considered:

• Select the series based on pressure requirements:

For systems with lower working pressure or general purposes, medium-sized series pipes can be chosen to save costs. For scenarios that require higher structural strength or can withstand higher pressure, heavy-duty series pipes should be selected.

• Select the protection method based on the environment:

In damp or easily corrosive environments, pipes that have undergone hot-dip galvanizing treatment should be given priority to significantly increase their service life.

• Pay attention to the connection method:

If the project requires frequent disassembly or on-site welding is inconvenient, pipes with threaded ends can be selected. If the system is mainly connected by welding, flat-end pipes can be selected.

• Key points for procurement and acceptance:

When making a purchase, the standard version, steel grade, series type, surface treatment requirements, etc. should be clearly defined. At the time of acceptance, suppliers can be required to provide material certificates that comply with the EN 10204 standard, and random checks can be conducted on dimensions, wall thickness and surface quality.