Inspect steel coil composition, mechanical properties, surface and dimensions to meet production standards.

Unfold steel coils and continuously feed flat steel strip into the production line.

Trim strip ends and weld strips together to ensure continuous production.

Level the steel strip to eliminate deformation and internal stress for smooth forming.

Trim strip edges to ensure uniform width and neat edges for stable welding.

Gradually bend flat steel strip into tubular blank through forming rollers.

Heat strip edges by high-frequency current and squeeze to form tight weld seams.

Remove excess inner and outer weld beads to obtain smooth pipe surface.

Treat welds and pipe body to eliminate welding stress and improve mechanical performance.

Cool high-temperature welded pipes rapidly to stabilize metal structure.

Calibrate pipe diameter and straighten pipes to eliminate ovality and bending.

Cut continuous pipes into specified fixed lengths via flying saw.

Remove sharp burrs from pipe ends to avoid usage and assembly defects.

Perform water pressure test to check pipe and weld tightness and pressure resistance.

Detect internal and welding defects of pipes without damage.

Visually check pipe surface for scratches, pits and other appearance defects.

Machine and chamfer pipe ends for convenient on-site welding installation.

Print specifications, batch and production information on pipe surface.

Apply anti-rust oil or coating to prevent pipe oxidation and corrosion.

Bundle qualified pipes and stack them neatly for storage and transportation.

Store qualified finished pipes and arrange delivery according to orders.