The DN150-DN200 hot-dip galvanized steel pipe increases the ambient temperature to solidify it, and various mechanized forming methods for discontinuous production have emerged, including bag press molding, injection molding, and compression molding. Filament winding and centrifugal forming, etc. Small diameter welded pipes are mostly straight seam welded, DN150-DN200 hot-dip galvanized steel pipes are mostly spiral welded, and both internal welding and external welding use the American Lincoln welding machine for single wire or double wire buried. arc welding to obtain stable welding specifications.

The welded seams of DN150-DN200 hot-dip galvanized steel pipes are all inspected by an online continuous ultrasonic automatic flaw tester. Especially in some natural gas pipelines, the pipeline industry where heating requires high strength and quality has more obvious advantages than other steel pipe galvanized steel pipes. The higher the requirements for DN150-DN200 hot-dip galvanized steel pipes. Steel pipe equipment, the higher the equipment cost and the greater the technical difficulty, the higher the price of the natural spiral steel pipe.