Pre-Bending
Edge Bending and Press Bending that is applied for the products with thickness greater than 40T Performed before the processing
Step2
Press-Bending
Carry out bending in the shape of J, C, O, using 7000 ton press
Step3
Post-Bending
Edge Bending and Press Bending that is applied for the products with thickness less than, and equal to 40T Performed before the processing
Step4
Tack Welding
Tack welding process for regular welding after the completion of forming (Bending)
Step5
External Welding
Exterior welding process of PAW and/or GTAW after the completion of tack welding
Step6
Longitudinal Seam Miling
In case of edge forming Y-model, groove manufacturing process for exterior welding
Step7
Internal Welding
GTAW internal welding process after the completion of external welding
Step8
Radiographic Test
Automatic controlled RT system for checking the welding zone integrity
Step9
Heat Treatment
Batch type heat treatment process for solution treatment of STS pipe
Step10
Sizing
Sizing operation to guarantee the roundness and straightness of the product size
Step11
End Facing
Process of bevel manufacturing both tips of tubes according to the product standard for field connection welding
Step12
Picking
Cleaning the product surface and passivation treatment process using acid solution
Step13
Hydrostatic Test
Test processing of water pressure for line pipe and steel pipes used in plumbing
Step14
Inspection / Packing
Final inspection (size, marking) and packaging process