Drinking Water Transportation ERW Steel Pipe DN200

For drinking water transportation systems, DN200 ERW steel pipes are commonly produced using Q235B or S235JR structural steel. Q235B steel provides a minimum yield strength of approximately 235 MPa and tensile strength ranging from 370 to 500 MPa, which is sufficient for medium-pressure water supply pipelines. The chemical composition is carefully controlled, typically maintaining carbon below about 0.22 percent and manganese around 1.40 percent, ensuring good weldability and consistent mechanical properties during long-term service.

At Huayang Steel Pipe, these pipes are manufactured using high frequency electric resistance welding technology, which forms a uniform longitudinal weld seam and maintains dimensional accuracy along the entire pipe length. Each pipe undergoes hydrostatic pressure testing, weld seam ultrasonic inspection, and dimensional verification. For potable water systems, internal epoxy coatings or external anti-corrosion coatings are commonly applied to improve hygiene performance and enhance corrosion resistance in buried pipeline environments.