Seamless steel pipes play an important role in industrial applications, and EN 10210 and EN 10216 are two common specifications in European standards, targeting seamless steel pipes for structural and pressure use respectively.

EN 10210 Standard
Material and composition:
The EN 10210 standard applies to hot-formed seamless steel pipes for structures. Common materials include S235JRH, S275J0H, S355J2H, etc. The main alloy components of these materials include carbon (C), manganese (Mn), silicon (Si), etc. The specific composition varies according to different grades. For example, the carbon content of S355J2H does not exceed 0.22%, and the manganese content is about 1.6%.

Inspection and finished products:
EN 10210 steel pipes need to undergo rigorous mechanical property tests, including tensile strength, yield strength and elongation tests. In addition, impact toughness tests are required to ensure performance in low temperature environments. The finished product must meet the dimensional tolerances and surface quality requirements specified in the standard, and the surface is usually rust-proofed.

EN 10216 Standard
Material and composition:
The EN 10216 standard applies to seamless steel pipes for pressure use. Common materials include P235GH, P265GH, 16Mo3, etc. These materials contain different alloying elements. For example, P235GH has a carbon content of no more than 0.16% and contains manganese and silicon; 16Mo3 contains molybdenum (Mo) and manganese, and has higher heat resistance.

Inspection and finished products:
EN 10216 steel pipes need to pass a series of strict inspection procedures, including chemical composition analysis, mechanical property testing and non-destructive testing (such as ultrasonic testing and X-ray testing). The finished steel pipe must meet the requirements of dimensional accuracy and wall thickness tolerance, and usually requires hydrostatic testing to ensure its reliability in high-pressure environments.

Summary
The EN 10210 and EN 10216 standards for seamless steel pipes are for structural and pressure steel pipes respectively, covering different material and composition requirements. Through strict inspection and testing procedures, the mechanical properties and reliability of the steel pipes are ensured. These standards provide a reliable basis for the selection of steel pipes in different industrial applications, ensuring the safety and stability of the project.