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- Weld Seam
The quality of a welding joint is crucial in the manufacturing of EN 10217-1 pipes. Any cracks, lack of fusion, or lack of penetration in the weld area can cause the pipe to fail, potentially leading to injuries or property damage. For this reason, strict quality control measures are in place to ensure that all welds meet the highest standards. In particular, repairs to the weld seam are not permitted unless they are carried out in accordance with an agreed documented procedure. This ensures that all repaired welds meet the required strength and integrity standards, ensuring the safety of both users and property.
- Tube Surface
The surface requirements mentioned in the standard apply to all types of welded or seamless pipes. These pipes shall be free from any kind of external or internal surface imperfections that can be detected by visual examination. The surface condition should be such that any surface imperfections requiring dressing can be identified easily. Dressing, in this context, means grinding or machining the surface to make it smooth. It is permissible to dress only those surface imperfections and after dressing, the wall thickness is not less than the minimum specified wall thickness. Also, all dressed areas should blend smoothly into the contour of the pipe so that there is no indentation or bulging. Any surface imperfection which is deeper than 5% of specified wall thickness T or 3mm, whichever is smaller, shall be dressed accordingly.
| Steel Grade |
Yield Strength ReH
for T wall thickness in mm (Mpa)
|
Tensile
strength Rm
|
Elongation at breakage A % min. | ||
| T ≤16 | 16<T≤ .40 | (Mpa) | Longitudinal | Transversal | |
| P265TR1 | 265 | 255 | 410-570 | 21 | 19 |
| Steel Grade | Chemical Composition in % in mass. | |||||
| Max C % | Max Si % | Max Mn % | Max P % | Max S % | Max Cr % | |
| P265TR1 | 0,200 | 0,400 | 1,400 | 0,025 | 0,020 | 0,30 |
| Number of Tubes per Test Unit | |
| Outside diameter (mm) | Maximum number of tubes per test unit |
| D | Quality TR1 |
| D≤114.3 | 400 |
| 114.3＜D≤323.9 | 200 |
| 323.9＜D≤660 | 100 |
| D＞660 | 50 |
| Wall thickness T | Maximum height of the weld seam (mm) | |
| Inside | Outside | |
| T≤12.5 | 3.5 | 3.5 |
| T＞12.5 | 4.8 | 4.8 |
| NPS |
Outside Diameter
(mm)
|
Wall Thickness (mm) |
Tolerances on the outside diameter (mm) |
Mass per unit of length (Kg/m) | |
| Max. | Min. | ||||
| 1” | 33,7 | 2,30 | 34,0 | 33,4 | 1.78 |
| 1.25” | 42,4 | 2,30 | 42,7 | 42,1 | 2,27 |
| 1.5” | 48,3 | 2,30 | 48,6 | 48,0 | 2,61 |
| 2” | 60,3 | 2,30 | 60,6 | 60,0 | 3.29 |
| 2.5” | 76,1 | 2.60 | 76,4 | 75,8 | 4.71 |
| 3” | 88,9 | 2.90 | 89,2 | 88,6 | 6,15 |
| 4” | 114,3 | 3,20 | 114,6 | 114,0 | 8.77 |
| 5” | 139,7 | 3.60 | 140,0 | 139,4 | 12.1 |
| 6” | 168,1 | 4,00 | 168,7 | 167,9 | 16.21 |
| 8” | 219,1 | 5,00 | 219,5 | 218,7 | 26.4 |
| 10’ | 273.1 | 5.00 | 275.15 | 271.05 | 33.1 |
| 12’ | 323.9 | 5.60 | 326.33 | 321.47 | 43.97 |
| NPS |
Outside
Diameter (mm)
|
Minimum Wall
Thickness (mm) with Standard
Tolerance
|
Tolerances on the outside diameter (mm) | Mass per unit of length (Kg/m) | |
| Max. | Min. | ||||
| 1” | 33,7 | 2,60 | 34,0 | 33,4 | 1,99 |
| 1.25” | 42,4 | 2,60 | 42,7 | 42,1 | 2,55 |
| 1.5” | 48,3 | 2,60 | 48,6 | 48,0 | 2,93 |
| 2” | 60,3 | 2,60 | 60,6 | 60,0 | 3,70 |
| 2.5” | 76,1 | 2.6 | 76,4 | 75,8 | 4.71 |
| 3” | 88,9 | 2.9 | 89,2 | 88,6 | 6,15 |
| 4” | 114,3 | 3,20 | 114,6 | 114,0 | 8.77 |
| 5” | 139,7 | 3.6 | 140,0 | 139,4 | 12.1 |
| 6” | 168,1 | 4,00 | 168,7 | 167,9 | 16.21 |
| 8” | 219,1 | 4,50 | 219,5 | 218,7 | 23,82 |
| 10’ | 273.1 | 5 | 275.15 | 271.05 | 33.1 |
| 12’ | 323.9 | 5.6 | 326.33 | 321.47 | 43.97 |
| Length L (mm) | Tolerance (mm) for outside diameter <406,4 mm |
| L < 6000 | 0/+10 |
| 6000 < L < 12000 | 0/+15 |
