• Blanking. Raw materials are polished to the right size and ready for production.
• Shrink tip. Using large machine high temperature process to change the shape of raw material pipe,.
• Welding. Use automatic welding machine to ensure smooth welding.
• Descaling. Repolish the product to keep the surface smooth and clean.
• Hot dip galvanized. The zinc coating can reach 80um to protect the product from corrosion.