Forged Bars / SST
Seamless Steel Tubes
Seamless steel tubes in a wide range from 21.3x3mm to 660x100mm, compliant with EN 10297-1 standard. High-performance solutions for hydraulic cylinders, pressure vessels, and petrochemical reactors.
Technical Specifications
Size Range
21.3x3 - 660x100 mm (DxS)
Heat Treatment
Q+T, Normalization, Annealing, SR
Length
3 - 12 meters (fixed or random length)
Standards
EN 10297-1, EN 10210-1, ASTM A106, API 5L
Key Features
- Superior pressure resistance with seamless production
- Homogeneous wall thickness distribution
- Wide size range (21.3 - 660mm outside diameter)
- Wall thickness up to 100mm
- Hydrostatic test applied
- Full length UT and MPI inspection
- Heat treatment options (Q+T, N, A, SR)
- Controlled inner and outer surface quality
Applications
- Hydraulic cylinder bodies
- Pressure vessels and reactors
- Petrochemical process piping
- Power plant boiler tubes
- Offshore platform structural tubes
- Mining transmission lines
- Defense industry applications
- Shipbuilding and marine
Dimension Table
| Dimension (mm) | Length (m) | Weight (kg/m) | Tolerance (mm) | Standard |
|---|---|---|---|---|
| 21.3 x 3 | 3 - 12 | 1.35 | +/-12.5% | EN 10297-1 |
| 33.7 x 4 | 3 - 12 | 2.93 | +/-12.5% | EN 10297-1 |
| 60.3 x 5 | 3 - 12 | 6.82 | +/-12.5% | EN 10297-1 |
| 88.9 x 6.3 | 3 - 12 | 12.84 | +/-12.5% | EN 10297-1 |
| 114.3 x 8 | 3 - 12 | 20.99 | +/-12.5% | EN 10297-1 |
| 168.3 x 10 | 3 - 12 | 39.01 | +/-12.5% | EN 10297-1 |
| 219.1 x 12.5 | 3 - 12 | 63.67 | +/-10% | EN 10297-1 |
| 273 x 16 | 3 - 12 | 101.4 | +/-10% | EN 10297-1 |
| 323.9 x 20 | 3 - 12 | 149.9 | +/-10% | EN 10297-1 |
| 406.4 x 25 | 3 - 12 | 235.1 | +/-10% | EN 10297-1 |
| 508 x 40 | 3 - 10 | 461.6 | +/-10% | EN 10297-1 |
| 660 x 100 | 3 - 8 | 1381.0 | +/-10% | EN 10297-1 |
Technical Notes
- 01Wall thickness tolerances are applied per EN 10297-1 Table 8.
- 02Hydrostatic test pressure is calculated per standard requirements.
- 03Minimum order quantity applies for large diameter tubes (>323.9mm).
- 04Inner surface quality can be honed for hydraulic cylinder applications.
- 05Consult for special steel grades (low temperature, corrosion resistance).
- 06Pipe ends can be delivered as plain cut, beveled, or threaded.