EN10220 vs EN10210 Seamless Pipes

With the continuous upgrading of engineering structures and pipeline system applications, it is crucial to choose the right seamless pipe standard. Among European standard seamless pipes, EN10220 and EN10210 are often confused. This article will systematically compare and analyze the two major European seamless pipe standards EN10220 and EN10210 from five aspects: standard scope, technical requirements, dimensions and tolerances, application areas and selection recommendations.

Standard scope

1. EN10220: General purpose size and quality standard.

EN10220 (formerly ENV10220 version) specifies the outer diameter series, wall thickness preferred size and unit mass of seamless and welded round steel pipes, and is suitable for ordinary steel pipes (including carbon steel pipe, alloy steel pipe and stainless steel pipe) for mechanical, pressure and structural purposes.

2. EN10210: Hot-formed structural steel pipes

EN10210 focuses on hot-formed welded or seamless structural steel pipes, especially square pipe and round pipes made of non-alloy and fine-grained steels, emphasizing the technical delivery conditions of hot-rolled forming, including chemical composition, mechanical properties and surface requirements, etc.

Dimension series and tolerances

1. EN10220 dimension series

Outer diameter series: divided into Series1, Series2, and Series3 to match the availability of pipe fittings.

Wall thickness range: from light-walled pipes to thick-walled pipes (above 70mm) The table lists commonly used preferred sizes and unit masses.

2. EN10210 common specifications

Typical outer diameters: 21.3mm, 26.9mm, 33.7mm, 42.4mm, etc.

Common wall thicknesses: 2.3mm, 2.6mm, 3.2mm, 4.0mm, etc.

Standard length/ton: such as 21.3×2.3mm is 928m/ton.

Technical requirements

1. EN10220

Material requirements: focus on size and quality, not directly standardize chemical composition.

Production process: seamless or annealing after welding, mainly focusing on dimensional deviation and quality.

Surface state: processing marks can be seen on the surface, no detailed requirements.

Inspection and quality control: calculate unit mass by mass formula, and perform basic water pressure/defect detection.

2. EN10210

Material requirements: strictly specify chemical composition (C ≤0.22%, Si ≤0.55%, etc.) and physical properties.

Production process: clarify the requirements for hot rolling cooling speed, forming uniformity and machining allowance.

Surface state: the hot-rolled surface may be rough and slightly uneven, but it does not affect the structural performance.

Inspection and quality control: size, wall thickness, mechanical property inspection and non-destructive testing are required to ensure load bearing and durability.

Typical application scenarios

1. EN10220 seamless pipe

General-purpose piping systems (machining, hydraulic piping, structural supports, etc.).

Occasions with low requirements for chemical composition and mechanical properties and mainly based on dimensional consistency.

2. EN10210 structural steel pipe

Building structures, bridge engineering, crane beams and industrial plant supports.

High-strength, corrosion-resistant, and high-temperature resistant places, such as petrochemical facilities and energy pipe racks.

Selection suggestions

1. Only dimensional consistency and quality control are required

It is recommended to use EN10220 series seamless pipes, which have relatively low procurement costs and flexible delivery.

2. High structural load-bearing and safety requirements

Give priority to EN10210 structural steel pipes, which meet strict chemical and mechanical inspection standards.

3. Anti-corrosion and high-temperature occasions

EN10210 alloy steel pipes perform better in high temperature resistance and corrosion resistance.

4. Accessory compatibility

If the project pipe fittings follow the Serie1 outer diameter standard, EN10220 or EN10210 can guarantee accessory compatibility in Serie1.

Summary

Through a comprehensive analysis of the EN10220 and EN10210 seamless pipe standards, engineers and purchasers can make scientific selections based on project requirements. EN10220 emphasizes universal dimensions and unit mass, while EN10210 focuses on structural performance and delivery conditions. The two have different focuses.