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Product Overview and Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | ERW Steel Pipe for Gas Transmission |
| Nominal Diameter | DN200 (219.1 mm OD) |
| Wall Thickness | 6.0 – 12.7 mm |
| Steel Grades | API 5L Gr.B / X42 / X52 |
| Length | 6 m / 12 m / Random Length |
| Standard | API 5L, GB/T 9711 |
| Manufacturing | High-Frequency Electric Resistance Welding |
| Surface | Black, 3PE, FBE Anti-corrosion |
Huayang's DN200 ERW gas transmission pipe is engineered for medium-pressure natural gas networks, offering stable weld integrity, controlled chemical composition, and consistent dimensional tolerance for pipeline construction.
Material Characteristics and Production Quality
Huayang DN200 ERW pipes for gas transmission are typically produced using API 5L Grade B, X42, or X52 pipeline steel, depending on project pressure requirements. The steel features controlled carbon content (≤0.26%) and optimized Mn levels (1.20–1.40%) to improve toughness and weldability. Mechanical performance generally includes minimum yield strength of 245–360 MPa and tensile strength between 415–460 MPa. Pipes are formed from hot-rolled coils using high-frequency resistance welding (HFW), ensuring a dense weld seam with minimal heat-affected zone. Huayang maintains OD tolerance within ±0.75% and wall thickness tolerance within ±10%, meeting the dimensional accuracy required for long-distance gas transmission pipelines. Anti-corrosion options such as 3PE or FBE coating further enhance durability in underground pipeline environments.
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