Where is ERW applicable?

ERW is applicable to medium and small-sized pipelines (Φ 168~660mm, wall thickness of 8~25mm), with steel grade of X56~X80. It is commonly used for branch pipelines and urban natural gas pipelines, submarine transmission pipelines and pipelines in high and cold areas. Its welding speed is high and it can be continuously produced, but it cannot be used as the main natural gas pipeline.