1、 Standard Overview

Scope of application:

EN 10216-2 is the EU standard for seamless steel pipes for pressure applications, covering manufacturing, testing, and delivery technical requirements for non alloy steel and alloy steel pipes under high temperature and high pressure conditions. It is applicable to scenarios such as boilers, heat exchangers, and petrochemical pipelines.

Alternative standards:

Replace old standards such as BS 3059-2 and BS 3602-1 in the UK, clarify the classification and testing methods for high-temperature performance.

2、 Material classification and grade

P195GH、P235GH、P265GH、16Mo3、13CrMo4-5、10CrMo9-10、15NiCuMoNb5-6-4(WB36)、X10CrMoVNb9-1、X10CrWMoVNb9-2

Non alloy steel:

Typical brand: P235GH (corresponding to domestic brands that need to be matched according to specific components), suitable for pressure vessels and medium and low temperature pipelines.

Characteristics: Low carbon content, emphasizing creep resistance and oxidation resistance at high temperatures.

Alloy steel:

Typical brand: 16Mo3 (1.5415), containing Mo 0.25~0.35%, Cr ≤0.30%， Used for high-temperature resistant components.

Other grades, such as 15CrMoG (corresponding to domestic), SA-213T91, etc., enhance high-temperature strength by adding elements such as Cr, Mo, and V.

3、 Chemical composition and mechanical properties

Chemical composition:

16Mo3: C 0.12~0.20%, Si ≤ 0.35%, Mn 0.40~0.90%, P/S ≤ 0.025/0.020%.

P235GH: Low alloy design with strict carbon content control to ensure weldability.

Mechanical properties:

High temperature performance: It needs to be verified through endurance strength tests, such as 16Mo3 maintaining stable creep resistance at 500 ℃.

Conventional performance: The tensile strength of non alloy steel is ≥ 335 MPa, while that of alloy steel can reach 415 MPa or above.

4、 Manufacturing and testing requirements

Production process:

The steel pipe is formed by hot rolling, cold drawing or extrusion, and needs to be normalized or tempered to optimize its structure.

The smelting of alloy steel requires controlling the impurity content through vacuum degassing or electric slag remelting.

Quality control:

Composition testing: Spectral analysis ensures that alloy elements (such as Mo, Cr) meet standard limits.

Surface and dimensions: The pipe end has no burrs, the outer diameter tolerance is ± 0.3 mm, and the wall thickness deviation is ≤ 10%.

5、 Typical application areas

Power industry: High pressure boiler superheaters, reheaters, and header pipelines.

Petrochemical industry: high-temperature reactors, heat exchangers, and fluid transport pipelines.

Mechanical manufacturing: hydraulic systems and high-strength structural components (requiring customized heat treatment).