The spiral steel pipe is manufactured using hot rolled steel strip which is spiraled at room temperature to be welded .Automatic submerged arc welding is the most commonly used method in the spiral tube production,and the end products come with welding seam inside and outside.

PROCESS FLOW DIAGRAM

1 Raw material inspection

2 Uncoiling

3Rough Leveling

4End Cutting and Butt Welding

5 cage -type

6 roll forming inside welding

7 Continuous ultrsonic

8 X-ray film inspection

9 Hydrostatic Testing

10 auto length-Measuring and Welghing

11 coating and marking

12 storage