EDGE MILLING
Process that secures the weldability of SAW by milling both longitudinal edges of plates with groove type (X or Y shaped)
PRE – BENDING
Process that forms both edges of plate in their optimal curvature by using press and tool
PRESS– BENDING
Process that forms the entire body of plate in its optimal external diameter by using press and tool
GAP CLOSING PRESS ( POST– BENDING )
Process that minimizes the open gap (the distance between two edges) by using press
TACK WELDING
Process to secure the original form through fitting-up (GMAW) two edges of completely formed product
INTERNAL WELDING
Process to weld inside grooved edge of formed pipe by SAW method
LONGITUDINAL SEAM MILLING (GAUGING)
Process to remove tack welds by milling
EXTERNAL WELDING
Process to weld outside grooved edge of formed pipe by SAW method
ULTRASONIC TEST
Process to examine whether there are defects in welds (crack, air hole, slag, etc.)by using ultrasonic waves before cold expanding
FULL LENGTH COLD EXPANDER
Process that cold-expand pipe’s O.D from inside of pipe in order to calibrate pipe dimension and to reduce residual stress of pipe.
END FACING
Process to machine both pipe ends as per customers’ requirements
HYDROSTATIC TEST
Process to test pipe hydrostatically with constant pressure and holding time
ULTRASONIC TEST
Process to examine whether there are defects in welds (crack, air hole, slag, etc.)by using ultrasonic waves after cold expanding.
ULTRASONIC TEST
Process to examine whether there are defects in welds (crack, air hole, slag, etc.)by using the radiation (X-ray)
PIPE END RADIOGRAPHIC TEST
Process to examine whether there are defects in welds of both pipe ends by using the radiation (X-ray)
HEAT TREATMENT
Process to heat-treat entire pipe in order to get required properties (depending on type of heat treatment)
MILL COATING
Process that prevents corrosion by spreading inhibited oil on product surface