Process to supply skelp to forming process by uncoiling the wound skelp
Process to flatten the uncoiled skelp
Process that secures the weldability of ERW by milling both longitudinal edges of skelp with square-shape(I type)
Process to transform a flat skelp into a round pipe and to prepare edge alignment for welding
The edges of the skelp are heated by high frequency welding and are squeezed together by pressure.
Process to heat-treat welds of pipe by using inductors (Normalizing)
Process to cool the normalized welds by air and water
Process to calibrate pipe dimension as per customers’ requirements
Process to cut the pipe length as per customers’ requirements
Process to machine both pipe ends as per customers’ requirements.
Process to test pipe hydrostatically with constant pressure and holding time.
ULTRASONIC TEST(SEAM & FULL BODY)
Process to inspect welds and base metal of pipe by using ultrasonic waves
Process that prevents corrosion by spreading inhibited oil on product surface
DIMENSION / VISUAL INSPECTION / PACKING
Process that packages and decides the acceptance/refusal by confirming the size of the final product and exterior condition