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Spiral submerged-arc welding pipes

Spiral Submerged-arc Welded Quality Assurance

Spiral welded pipe production by submerged arc method is based on using tandem welding technique for joining inside and outside coil edges, which have been trimmed and beveled by carbide milling for high quality weld structure.
Excellent Equipment:
Online Ultrasonic Inspecting for Welded Seam
Ultrasonic Inspecting
Spirally Suberged Arc Welded Pipe Mill
Lincoln Welder Welding
Underground Tunnel
SSAW pipe mills
Supercoil Accumulator
Supercoil Accumulator
High Frequency Welding
High Frequency Welding
Forming Machine
Forming Machine
Normalizing
Normalizing
Off-Line Ultrasonic Inspecting for Welded Seam
Airport

There are nine modernized product lines in our company with the yield capacity of 1000 thousands tons of B-X80 steel pipe of φ219-φ3200mm, WT5-30mm.

Quality Control:
X-Ray Testing Online
X-Ray Testing Online
Outside Diameter Control
Outside Diameter Control
Hydrostatic Testing
+ Hydrostatic Testing
Pipe Test Centre:
Chemical Analysis
Chemical Analysis
Universal Testing Machine
Universal Testing Machine
Metallurgical Analysis
Metallurgical Analysis
Note:

Welding of hot rolled steel coils takes spiral form after passing through preforming and forming rolls. Excellent exterior weld quality at high production speeds is provided by double submerged arc welding process. Manufactured pipes are cut to the desired lengths at the exit of the pipe machine. Pipe ends are beveled by means of carbide machining for accurate on-site welding.

After the pipe is conveyed to hydrostatic testing and off-line ultrasonic testing and/or real time X-ray inspection, the pipe will be subject to final inspection for the compliance to customer requirements.

Starting from incoming control up to the final inspection stage; entire process is monitored and supported by computerized system. Traceability is achieved by input controls and barcodes through entire production lines.




About Sunny Steel

Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.