In the previous article, we discussed why industries are shifting to continuous coiled tubing. Now let’s take a deeper look at how 10,000m continuous stainless steel coiled tubing is actually manufactured.
Raw Material Preparation
The process begins with high-quality stainless steel strip coils.
Each strip typically weighs 380–400 kg, ensuring long continuous feeding during production.
Laser Welding Process
The strips are joined using laser welding technology, which offers:
- High precision
- Minimal heat-affected zone
- Strong and consistent weld seam
Unlike traditional butt welding, the strips are connected using skewed joints, ensuring there is no circumferential weld seam in the final tubing.
Tube Forming
After welding, the strip is gradually formed into a tubular shape through precision rolling equipment.
This stage ensures:
- Uniform diameter
- Smooth surface finish
- Dimensional accuracy
Annealing Process
The tubing undergoes heat treatment (annealing) to:
- Relieve internal stress
- Improve ductility
- Enhance corrosion resistance
Annealing is a critical step for ensuring long-term performance.
Cold Drawing
Next comes the cold drawing process, which improves:
- Mechanical strength
- Surface quality
- Dimensional precision
This step is often followed by a second annealing process.
Final Result: 10,000m Continuous Tubing
Through this advanced process, the final product achieves:
- Continuous length up to 10,000 meters
- No circumferential weld joints
- Superior strength and reliability
Why This Matters
For industries like oil & gas, even a single failure point can lead to huge losses.
That’s why continuous tubing without welded joints is becoming the new standard.
Conclusion
Manufacturing technology is the key factor behind the performance of continuous coiled tubing.
In the next blog, we’ll discuss how to choose the right material (316L, duplex, etc.) for different applications.
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Looking for ultra-long stainless steel coiled tubing?
We offer:
- Up to 10,000m continuous tubing
- Advanced laser welding
- Custom solutions
Contact us now for quotation.