Anti corrosion steel pipes are suitable for underground water supply and drainage, underground grouting, positive and negative pressure ventilation, gas drainage, fire sprinkler, etc. in coal mines; Process water waste residue and pipeline for thermal power plants; The water supply pipelines for fir...

High frequency welded steel pipe: It is a product produced by using the skin effect and proximity effect of high-frequency current to heat and melt the edge of the pipe blank after hot rolled coil is formed by a forming machine, and then pressure welding is carried out under the action of an extrusi...