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- Weld Seam
The weld area of EN 10217-1 pipe shall be free from cracks, lack of fusion, and lack of penetration. Repairs to the weld seam of EW and HFW tubes are not permitted. Repairs to the weld seam of SAW tubes shall be allowed if done by an agreed documented procedure. This ensures that the pipe is strong and durable, and able to withstand the stresses of transport and installation. In addition, it helps to prevent leaks and other problems that can occur when welding defects are present.
- Tube Surface
According to EN 10217-1 surface requirement, pipes must be free from external and internal surface defects that can be detected by visual examination. Additionally, the finish and surface condition should allow for any imperfections requiring dressing to be identified. It is permissible to dress surface imperfections by grinding or machining, but only if the wall thickness in the dressed area is not less than the specified minimum wall thickness. All dressed areas should blend smoothly into the contour of the tube. Any surface imperfection that is deeper than 5% of the wall thickness T or 3mm (whichever is smaller) must be dressed. By following these guidelines, manufacturers can ensure that their pipes meet the necessary surface requirements laid out in EN 10217-1.
| Steel Grade |
Yield Strength ReH
for T wall thickness in mm (Mpa)
|
Tensile
strength Rm
(Mpa)
|
Elongation at breakage A % min. | ||
| T ≤16 | 16<T≤ .40 | Longitudinal | Transversal | ||
| P235TR2 | 235 | 225 | 360-500 | 25 | 23 |
| Steel Grade | Chemical Composition in % in mass. | ||||
| Max C % | Max Si % | Max Mn % | Max P % | Max S % | |
| P235TR2 | 0,160 | 0,350 | 1,200 | 0,025 | 0,020 |
| 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 |
| 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 |
