Seamless "U" Tubes
Specialised tubing formed into a U-shape by precision cold bending, used in heat exchangers, boilers and instrumentation systems for its corrosion resistance and strength.
Bent to bundle geometry, without a seam
U tubes are produced by precision cold bending on U-bending machines, so the leg and bend radius suit the exchanger bundle they are built for. Seamless construction ensures pressure resistance and leak prevention through the bend, where a welded seam would be most vulnerable.
Outer diameters run from 9.52 mm to 50.80 mm with wall thicknesses from 0.70 mm to 8.00 mm. Legs length upto 8 metres, following schedules such as SCH10S, SCH40S, SCH80S or SCH160S.
Built for the exchanger bundle
Leak prevention
Seamless construction through the bend removes the weld zone as a failure point.
Precision bending
Cold bending on dedicated U-bending machines holds bend radius and leg length to drawing.
Solution treated
Heat treatment at 1040 degrees Celsius restores ductility and corrosion resistance after forming.
Finish options
Annealed, pickled, polished or bright annealed for cleanability and fouling resistance.
| O.D. (mm) | 0.7 mm | 1.0 mm | 1.65 mm | 2.0 mm | 2.6 mm | 3.0 mm |
|---|---|---|---|---|---|---|
| 9.52 | 0.154 | 0.213 | 0.330 | 0.390 | 0.488 | 0.546 |
| 12.7 | 0.210 | 0.293 | 0.444 | 0.540 | 0.685 | 0.773 |
| 19.0 | 0.320 | 0.450 | 0.696 | 0.850 | 1.066 | 1.200 |
| 25.4 | 0.432 | 0.610 | 0.952 | 1.170 | 1.482 | 1.680 |
| 50.8 | — | — | 1.968 | 2.440 | 3.133 | 3.585 |
Where U tubes are used
What to send us for a firm quote
The more of this we have up front, the faster the quotation and the fewer clarifications later. Partial enquiries are welcome — we will tell you what else the specification needs.
Send an enquirySeamless "U" Tubes — common questions
How are U tubes formed?
By precision cold bending on dedicated U-bending machines, so bend radius and leg length match the exchanger bundle drawing.
What are the mechanical properties after solution treatment?
After solution treatment at 1040 degrees Celsius, all mechanical properties as per standard requierments.
Are the bends tested?
Yes. Pressure testing and NDT are carried out after bending, and finishes are supplied annealed, pickled, polished or bright annealed.
Enquire about Seamless "U" Tubes
Send grade, OD, wall, length, standard and finish for a firm quotation.