EN 10216-2, DIN 17175 Pipes for pressure purposes with specified elevated temperature properties. Boiler tubes
Boiler tubes are used in heat exchange appliances in which the energy is transferred from one medium to the other. The pipes are manufactured from carbon and low-alloy steel grades which are resistant to loads under high pressure and temperatures. They are used for the construction of power engineering appliances such as: boilers, heating coils, stoves, heaters, heat exchangers.
The pipes are manufactured with the diameters between 21,3 – 660 mm and with the wall thickness of up to 100 mm in the case of hot rolling, and with the diameters between 10,2 – 108 and with the wall thickness of up to 12,5 mm in the case of cold drawing.
The pipes are manufactured with TC1 tests (I requirement level) and TC2 (III requirement level) according to PN-EN10216-2.
EN10216-2
| Steel grades used | Details: Table 1 |
| Dimensions and tolerances | Details: Table 2 |
| Pipe lengths | Pipes with precise lengths are manufactured with the following tolerance values:
|
| Tightness | Pipes should be subject to water testing (7Mpa) or electromagnetic testing. |
| Straightness | < 0,0015 of pipe length (below 3mm per every meter of pipe length) |
| Tests | Details: Table 3 |
Table 1
| Mechanical properties | |||||||||||||
| Pipe types | Steel grades | Mechanical properties during tensile testing in room temperature | Resilience | ||||||||||
| Boiler P195GH, P235GG P265GH 16Mo3 14MoV6-3 13CrMo4-5 10CrMo9-10 Wg PN-EN 10216-2 | Upper yield limit or yield strength Re or R0,2 for wall thickness of t min | Tensile strength Rm | Elongation A min% | Minimum energy average absorbed KVJ at the temperature of 0°C | |||||||||
| T<\=16 | 16<T<\=40 | 40<t<\=60 | 60<T<\=60 | I | T | ||||||||
| MPa | MPa | MPa | MPa | MPa | I | t | 20 | 0 | -10 | 20 | 0 | ||
| P195GH | 195 | – | – | – | 320- 440 | 27 | 25 | – | 40 | 28 | – | 27 | |
| P235GH | 235 | 225 | 215 | – | 360- 500 | 25 | 23 | – | 40 | 28 | – | 27 | |
| P265GH | 265 | 255 | 245 | – | 410- 570 | 23 | 21 | – | 40 | 28 | – | 27 | |
| 16Mo3 | 280 | 270 | 260 | – | 450- 600 | 22 | 20 | 40 | – | – | 27 | – | |
| 14MoV6-3 | 320 | 320 | 310 | – | 460- 610 | 20 | 18 | 40 | – | – | 27 | – | |
| 13CrMo4-5 | 290 | 290 | 280 | – | 440- 590 | 22 | 20 | 40 | – | – | 27 | – | |
| 10CrMo9-10 | 280 | 280 | 270 | – | 480- 630 | 22 | 20 | 40 | – | – | 27 | – | |
| Steel grades | CHEMICAL COMPOSITION (LADLE ANALYSIS) | |||||||||||||
| C% max | Si% max | Mn% max | P% max | S% max | Cr% max | Mo% max | Ni% max | Al.cał% min | Cu% max | Nb% max | Ti% max | V% max | Cr+ Cu+ Mo+ Ni% MAX | |
| P195GH | 0,13 | 0,35 | 0,70 | 0,025 | 0,020 | 0,30 | 0,08 | 0,30 | >\= 0,020 | 0,30 | 0,010 | 0,040 | 0,02 | 0,70 |
| P235GH | 0,16 | 0,35 | 1,20 | 0,025 | 0,020 | 0,30 | 0,08 | 0,30 | >\= 0,020 | 0,30 | 0,010 | 0,040 | 0,02 | 0,70 |
| P265GH | 0,20 | 0,40 | 1,40 | 0,025 | 0,020 | 0,30 | 0,08 | 0,30 | >\= 0,020 | 0,30 | 0,010 | 0,040 | 0,02 | 0,70 |
| 16Mo3 | 0,12- 0,20 | 0,35 | 0,40- 0,70 | 0,025 | 0,020 | 0,30 | 0,25- 0,35 | 0,30 | >\= 0,020 | 0,30 | – | – | – | – |
| 14MoV6-3 | 0,10- 0,15 | 0,15- 0,35 | 0,40- 0,70 | 0,025 | 0,020 | 0,30- 0,60 | 0,50- 0,70 | 0,30 | >\= 0,020 | 0,30 | – | 0,22-0,28 | – | – |
| 13CrMo4-5 | 0,15 | 0,50- 1,00 | 0,30- 0,60 | 0,025 | 0,020 | 1,00- 1,50 | 0,45- 0,65 | 0,30 | >\= 0,020 | 0,30 | – | – | – | – |
| 10CrMo9-10 | 0,10- 0,17 | 0,35 | 0,40- 0,70 | 0,025 | 0,020 | 0,70- 1,15 | 0,40- 0,60 | 0,30 | >\= 0,020 | 0,30 | – | – | – | – |
Table 2
| Outside diameter and wall thickness tolerances | |||||
| Outside diameter D mm | Permissible deviations of outside diameter D | Permissible deviations of wall thickness t 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% | |
| For the outside diameter of D>\=355,6 mm, local deviation outside of the upper deviation limit by further 5% of the wall thickness T is permitted | |||||
| Inside diameter and wall thickness tolerances | |||||
| Permissible deviations of inside diameter | Permissible T deviations depending on the T/d ratio | ||||
| d | dmin | <\-0,03 | >0,03 <\=0,06 | >0,06 <\=0,12 | >0,12 |
| +\- 1% or +\- 2mm depending on which is greater | +2% +4mm depending on which is greater | +\-20% | +\-15% | +\-12,5% | +\-10% |
| For the outside diameter of D>\=355,6 mm, local deviation outside of the upper deviation limit by further 5% of the wall thickness T is permitted | |||||
Table 3
EN 10216-2:2002
| 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 | ||
