EN 10216-1 Seamless Steel Pipe
Standard:EN 10216-1 Seamless steel tubes for pressure purposes – Technical delivery conditions – Part 1: Non-alloy steel tubes with specified room temperature properties
Description
EN 10216-1 P265 Seamless Steel Tubes For Pressure Purposes
Standard:EN 10216-1
Seamless steel tubes for pressure purposes – Technical delivery conditions – Part 1: Non-alloy steel tubes with specified room temperature properties
EN 10216-1 Standard specifies the technical delivery conditions for two qualities TR1 and TR2 of seamless tubes of circular cross section with specified room temperature properties made of non-alloy quality steel.
Main grades：P195、P235、P265
Manufacturing process
The tubes shall be manufactured by a seamless process. Hot formed or cold finished
Chemical composition of EN 10216-1 P195、P235、P265
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Standard
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Grade | Chemical composition (%) | ||||||||||||
| C | Si | Mn | P | S | Cr | Mo | Ni | Cu | Nb | Ti | V | Cr+Cu+Mo+Ni | ||
| EN10216-1 | P195 | ≤0.13 | ≤0.35 | ≤0.70 | ≤0.025 | ≤0.020 | ≤0.30 | ≤0.08 | ≤0.30 | ≤0.30 | ≤0.01 | ≤0.04 | ≤0.02 | ≤0.70 |
| P235 | ≤0.16 | ≤0.35 | ≤1.20 | ≤0.025 | ≤0.020 | ≤0.30 | ≤0.08 | ≤0.30 | ≤0.30 | ≤0.01 | ≤0.04 | ≤0.02 | ≤0.70 | |
| P265 | ≤0.20 | ≤0.40 | ≤1.40 | ≤0.025 | ≤0.020 | ≤0.30 | ≤0.08 | ≤0.30 | ≤0.30 | ≤0.01 | ≤0.04 | ≤0.02 | ≤0.70 | |
Mechanical properties of EN 10216-1 P195、P235、P265
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Standard
|
Grade |
Tensile strength(MPa) |
Yield strength(MPa) |
Elongation(%) |
|
EN 10216-1 |
P195 |
320～440 |
≥195 |
≥27 |
|
P235 |
360～500 |
≥235 |
≥25 |
|
|
P265 |
410～570 |
≥265 |
≥23 |
Appearance
The tubes shall be free from external and internal surface defects that can be detected by visual examination.
The internal and external surface finish of the tubes shall be typical of the manufacturing process and,where applicable, the heat treatment employed. Normally the finish and surface condition shall be such that any surface imperfections requiring dressing can be identified.
It shall be permissible to dress, only by grinding or machining, surface imperfections provided that, after doing so, the wall thickness in the dressed area is not less than the specified minimum wall thickness. All dressed areas shall blend smoothly into the contour of the tube.
Surface imperfections which encroach on the specified minimum wall thickness shall be considered defects and tubes containing these shall be deemed not to conform to this Part of this EN 10216.
Internal soundness
Leak-tightness
The tubes shall pass a hydrostatic test or electromagnetic test for leak-tightness.
Non-Destructive Testing
Option 6: The tubes of quality TR2 shall pass a non-destructive test for the detection
Straightness
The deviation from straightness, of any tube length L shall not exceed 0,0015 L. Deviations from straightness over any one metre length shall not exceed 3 mm.
Preparation of ends
Tubes shall be delivered with square cut ends. The ends shall be free from excessive burrs.
Tolerances
Tolerances on diameter and thickness
Out-of-roundness is included in the tolerances on outside diameter and eccentricity is included in the tolerances on wall thickness
Tolerances on outside diameter and on wall thickness
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Outside diameter (D mm)
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Tolerances on D | Tolerances on T for a T/D ratio | |||
| ≤0,025 |
＞0,025
≤ 0,050
|
＞0,050
≤ 0,10
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＞0,10 | ||
| D ≥219,1 |
±1% or 0,5 mm whichever is the greater
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±12,5 % or ±0,4 mm whichever is the greater
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| D＜219,1 | ±20 % | ±15 % | ±12,5 % | ±10 % a | |
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a ： For outside diameters D 355,6 mm it is permitted to exceed the upper wall thickness locally by a further 5% of the wall thickness T
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Tolerances on exact lengths
| Length L | Tolerance on exact length |
| L ≤ 6000 |
+10
0
|
| 6000 ＜L ≤12 000 |
+15
0
|
| L ＞12 000 |
+by agreement
0
|