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SAW Process
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Submerged Arc Welding (SAW) is a welding process that utilizes a submerged arc to protect the weld from atmospheric contamination. This results in high-quality welds with minimal defects. SAW pipes are particularly well-suited for the fabrication of large-diameter or thick-walled pipes. Due to their superior quality and durability, SAW pipes are widely used in critical industries such as petrochemical, shipbuilding, and offshore construction.
SAW Factories
Ulsan No.2 Plant (LSAW)
Phone 052-240-1800
Fax 052-240-1830
58 Cheoyongsaneop-ro, Onsan-eup, Ulju-gun, Ulsan
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Ulsan No.3 Plant (SPIRAL)
Phone 052-240-1800
Fax 052-240-1830
41 Wonbong-ro, Onsan-eup, Ulju-gun, Ulsan
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SAW Manufacturing Process
01 Raw Material Cutting
Initial production of plasma-cut afterburners. Quality-tested 300mm follow-up products will be deployed based on length
02 Edge Milling
The rear plate is loaded onto the moving carriage and passes through the stationary head cutter, processing both edges.
03 Pre-Bending
Edge banding is applied to all edges prior to JCO banding. Modify the mold according to the banding outer diameter. Sequential Press Execution.
03-2 JCO Press Bending
J-shaped → C-shaped → O-shaped transformation and capable of forming various outer diameters with high specific gravity without tool changes
04-1 Tack Welding
Temporary tack weld to hold original configuration
04-2 Inside Welding
SAW Main Welding after Seam Tracking
04-3 Outside Welding
SAW fillet weld on the outside of the plate
05 Weld Bead Cutting
Welding and post-weld heat treatment (PWHT) cutting
06 Plasma cutting machine
Ring Tab Cutting and Tab Piece Removal Process
07 4WAY Calibration
Pipe reduction process on the outer surface of the pipe at a constant rate
08 End Facing
Bevel gear face milling
09 Hydrostatic Test
The process of filling a pipe with water, raising the pressure to the specified level, and checking for leaks
10 X-ray Test
Radiographic Exposure Difference Inspection
11 UT Test
Seam UT inspection of pipe welds
12 Heat Treatment
Place the pipe in the heating furnace and perform the SR process
13 End Calibration
Revise the epicenter map using the azimuth correction tool
14 Inspection
Final Inspection
15 Marking/Packing
Product Marking/Packaging in Progress
16 Shipment
Loading products onto trucks
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01 Plating
Put two plates together
02 Turn over
Reversing a thick iron slab
03 6M Roll Bending
3 Roll Bending Process(6M)
03-2 4.5M Roll Bending
3 Roll Bending Process(4.5M)
04-1 Inside Welding
Welding process for the inside of SAW
04-2 Outside Welding
Welding process for the outside of SAW
05 Hydrostatic Test
The process of filling a pipe with water, raising the pressure to the specified level, and checking for leaks
06 X-ray Test
Radiographic Exposure Difference Inspection
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01 H/Coil
Receive raw material(H/Coil)
02 Uncoiling
Uncoiling Process of H/Coils
03 Inside Skelp
Welding the inner surface of the Top/End connection of Skelp
04 Edge Milling
Skelp Edge Milling Process
05 Forming/Welding
Spiral-shaped circular work, welding the inside and outside of each process
06 Cut-Off
Cutting process to match the customer's requested length or multiples thereof
07 End Facing
Beveling the pipe end facing
08 Outside Skelp
Outer welding process of the top/end of a pipe after inner welding is complete
09 Facing
Pipe Beveling Process
10 End Reinforcing
Attaching a reinforcing shoe to the tip of a pile process
11 Inspection/Marking/
Inspection → Marking → Packing process
12 Shipment
Loading products onto trucks
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