EN10219 Steel Pipe DN600

How Mechanical Data Support Scenario Selection?

Mechanical properties are the intuitive reflection of the differences between the grades, and the test data from Huayang's CNAS-certified laboratory provides a clear answer. For seamless pipes of the same specification (DN100, wall thickness 6mm), Grade A has a tensile strength of 331-414MPa and a yield strength of ≥207MPa; Grade B's tensile strength jumps to 414-517MPa, with a yield strength of ≥241MPa, which is 20% higher than that of Grade A. This means that under the same wall thickness, Grade B can withstand 20% more pressure, making it the first choice for medium-pressure scenarios.

For electric resistance welded steel pipe, the weld is the key. The weld tensile strength of Huayang's Grade A ERW pipes is ≥331MPa, which can pass the 180° bend test without cracks; after normalizing heat treatment at 900℃, the weld strength of Grade B ERW pipes reaches ≥414MPa, which is equivalent to the base metal. In the 2024 Tianjin Port oil product project, 15,000 tons of Huayang's Grade B ERW pipes withstood a pressure of 1.6MPa and had zero leakage after half a year of service, confirming their performance advantages.

Huayang's laboratory data and project cases prove that Grade A is suitable for low-pressure applications, Grade B for medium-pressure applications, and the weld quality control of electric resistance welded steel pipe is the core of meeting its performance standards.