Step1

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