This part of EN1026 specifies the technical delivery conditions in two test categories for seamless tubes for circular cross section, with specified elevated temperature properties, made of non-alloy and alloy steel.
Chemical composition:
| Steel grade | C | Si | Mn | P | S | Cr b | Mo b | Ni b | Al tot | Cu b c |
Nb b | Cr+Cu +Mo+Ni |
|
| Steel name | Steel number | max. | max. | max. | Max. | max. | max. | max. | max. | min. | max. | max. | max. b |
| P195TR1 | 1.0107 | 0,13 | 0,35 | 0,70 | 0,025 | 0,020 | 0,30 | 0,08 | 0,30 | – | 0,30 | 0,010 | 0,70 |
| P195TR2 | 1.0108 | 0,13 | 0,35 | 0,70 | 0,025 | 0,020 | 0,30 | 0,08 | 0,30 | 0,02 d | 0,30 | 0,010 | 0,70 |
| P235TR1 | 1.0254 | 0,16 | 0,35 | 1,20 | 0,025 | 0,020 | 0,30 | 0,08 | 0,30 | – | 0,30 | 0,010 | 0,70 |
| P235TR2 | 1.0255 | 0,16 | 0,35 | 1,20 | 0,025 | 0,020 | 0,30 | 0,08 | 0,30 | 0,02 d | 0,30 | 0,010 | 0,70 |
| P265TR1 | 1.0258 | 0,20 | 0,40 | 1,40 | 0,025 | 0,020 | 0,30 | 0,08 | 0,30 | – | 0,30 | 0,010 | 0,70 |
| P265TR2 | 1.0259 | 0,20 | 0,40 | 1,40 | 0,025 | 0,020 | 0,30 | 0,08 | 0,30 | 0,02 d | 0,30 | 0,010 | 0,70 |
a Elements not included in this Table shall not be intentionally added to the steel without the agreement of the purchaser, except for elements which may be added for finishing the cast. All appropriate measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in the steelmaking process.
b The content of these elements need not be reported unless intentionally added to the cast.
c Option 2: In order to facilitate subsequent forming operation, an agreed maximum copper content lower than indicated and an agreed specified maximum tin content shall apply.
d This requirement is not applicable provided the steel contains a sufficient amount of other nitrogen binding elements which shall be reported.
Mechanical property:
| Steel grade | Tensile properties | Impact properties | ||||||||
| Steel name | Steel number | Upper yield strength ReH b min. for Wall Thickness T mm | Tensile Strength Rm | Elongation A min. % b c |
Minimum average absorbed energy KV J at a temperature of °C c | |||||
| T =16 | 16 < T =40 | 40 < T =60 | l | t | ||||||
| Mpa | Mpa | Mpa | Mpa | l | t | 0 | -10 | 0 | ||
| P195TR1 e | 1.0107 | 195 | 185 | 175 | 320 to 440 | 27 | 25 | – | – | – |
| P195TR2 | 1.0108 | 195 | 185 | 175 | 320 to 440 | 27 | 25 | 40 | 28 d | 27 |
| P235TR1 e | 1.0254 | 235 | 225 | 215 | 360 to 500 | 25 | 23 | – | – | – |
| P235TR2 | 1.0255 | 235 | 225 | 215 | 360 to 500 | 25 | 23 | 40 | 28 d | 27 |
| P265TR1 e | 1.0258 | 265 | 255 | 245 | 410 to 570 | 21 | 19 | – | – | – |
| P265TR2 | 1.0259 | 265 | 255 | 245 | 410 to 570 | 21 | 19 | 40 | 28 d | 27 |
Inspection and Test For EN 10216-2 Steel Pipe
| Inspection and test type | Test frequency | Test category | ||
|---|---|---|---|---|
| Mandatory tests | Ladle analysis | One per ladle | 1 | 2 |
| Tensile testing in room temperature | One per every test pipe | X | X | |
| Flattening test for D<600mm and the ratio of D≤0.15 but T≤40mm or ring testing for D>150mm and T ≤40mm | X | X | ||
| Rolling test on a mandrel bar for D≤150mm and T≤10mm or ring testing for D≤114,3mm and T ≤12,5mm | X | X | ||
| Resilience testing at the temperature of 20 ºC | X | X | ||
| Tightness testing | Every pipe | X | X | |
| Dimensional testing | X | X | ||
| Visual inspection | X | X | ||
| NDT in order to identify longitudinal discontinuity | Every pipe | X | X | |
| Material identification for alloy steel | X | X | ||
| Optional tests | Final product analysis | One per ladle | X | X |
| Tensile testing at elevated temperature | One per ladle and for the same thermal processing conditions | X | X | |
| Resilience testing | One per every test pipe | X | X | |
| Resilience testing in the machine direction at the temperature of -10ºC for non-alloy steel grades | X | X | ||
| Wall thickness measurement at a distance from pipe ends | X | X | ||
| NDT in order to identify transverse discontinuity | Every pipe |
X | X | |
| NDT in order to identify delamination | X | X | ||
Dimension for EN10216-2 Steel pipe
| EN 10216-2 Outside diameter and wall thickness tolerances | |||||
|---|---|---|---|---|---|
| Outside diameter D mm | Permissible deviations of outside diameter D |
Permissible deviations of wall thickness depending on the T/D ratio |
|||
| ≤0.025 | >0.025 ≤0.050 |
>0.050 ≤0.10 |
>0.10 | ||
| D≤219,1 | +\- 1% or =\- 0.5mm depending on which is greater | +\- 12,5% or 0.4 mm depending on which is greater | |||
| D>219,1 | =\- 20% | =\- 15% | =\- 12,5% | =\- 10% | |
Marking:
- Pipes are supplied with marking according to standard and customer request.
- Marking is paint on the ends of pipes.
- The same data, as well as additional information per customer’s request, is indicated on the bundle’s tags.
Delivery:
- Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.
- Weight of bundle – up to 5000 kg upon request of customer.
- Each bundle is furnished with three tags.
