EN 10216-2 Seamless Steel Tube
P265GH Seamless Steel Tubes
EN 10216-2 P265GH Seamless Steel Tubes
Short Description:
EN 10216-2 P265GH Seamless steel tubes Standard: EN 10216-2 Seamless steel tubes for pressure purposes Technical delivery conditions Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties.
EN 10216-2 P265GH Seamless steel tubes Quick Details
Manufacture:Seamless process
Wall thickness(WT): 2.1mm——20 mm.
Outer diameter (OD): 21 mm——509mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Threaded
Additional Info
Surface: Tubes will be varnished (Outside only) to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Bundles (hexagonal), Wooden Boxes, Crates (steel/wooden) or as required
The steel name of non-alloy steel grades
(1)The capital letter P for pressure purposes;
(2)The symbols GH for elevated temperature.
MANUFACTURING PROCESS
(1)Steel making process
Steels shall be fully killed.
(2)Tube manufacture and delivery conditions
The tubes shall be manufactured by a seamless process.
The tubes can be either hot or cold finished.
EN 10216-2 P265GH Seamless steel tubes shall be supplied in the relevant heat treatment conditions as specified in Table 1.
| Steel grade | Heat treatment a | Austenizing | Tempering | |||
| Steel name | Steel number | Temperature °C | Cooling Medium | Temperature °C | Cooling medium | |
| P265GH | 1.0425 | +N b | 880 to 940 | Air | – | – |
| a +N = Normalising, +NT = Normalising + Tempering, +QT = Quenching + Tempering (air or liquid), +I = Isothermal Annealing. b Normalising includes Normalising Forming. | ||||||
Chemical composition of EN 10216-2 P265GH
| Steel grade | Steel number | C | Si | Mn | P max | S max | Cr | Mo | Ni |
| P265GH | 1.0425 | ≤ 0,20 | ≤ 0,40 | ≤ 1,40 | 0,025 | 0,020 | ≤ 0,30 | ≤ 0,08 | ≤ 0,30 |
| Al tot | Cu | Nb | Timax | V | Cr+Cu+Mo+Ni | Others |
| ≥ 0,020 b | ≤ 0,30 c | ≤ 0,010 d | 0,040 | ≤ 0,02 | ≤ 0,70 | – |
Mechanical properties of EN 10216-2 P265GH
| Steel grade | Upper yield strength or proof strength R eH or Rp 0,2 for Wall Thickness T min. | Tensile Strength Rm | Elongation A min. % a | |||||
| Steel name | Steel number | T ≤ 16 | 16 < T ≤ 40 | 40 < T ≤ 60 | 60 < T ≤ 100 | l | t | |
| MPa * | MPa * | MPa * | MPa * | MPa * | ||||
| P265GH | 1.0425 | 265 | 255 | 245 | – | 410 to 570 | 23 | 21 |
Note:l = longitudinal t = transverse
Dimensions tolerances of EN 10216-2
Tolerances on outside diameter and wall thicknes
| Outside Diameter D mm | Tolerances on D | Tolerances on T for a T/D ratio | |||
| ≤ 0,025 | > 0,025 ≤ 0,050 | > 0,050 ≤ 0,10 | > 0,10 | ||
| D ≤ 219,1 | ± 1% or ± 0.5mm whichever is the greater | ± 12,5% or ± 0.4mm whichever is the greater | |||
| D > 219,1 | ± 20% | ± 15% | ± 12,5% | ± 10% a | |
| 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 | |||||
Tolerances on inside diameter and wall thickness
| Tolerances on inside diameter | Tolerances on T for a T/d ratio | |||||
| d | d min | ≤ 0,03 | > 0,03 ≤ 0,06 | > 0,06 ≤ 0,12 | > 0,12 | |
| ± 1% or ± 2 mm whichever is the greater | (+ 2% ,0)or (+ 4 mm,0) | whichever is the greater | ± 20% | ± 15% | ± 12,5% | ± 10% a |
| 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 | ||||||
Tolerances on outside diameter and minimum wall thickness
| Outside diameter D mm | Tolerances on D | Tolerances on T min for a T min /D ratio | |||
| ≤ 0,02 | > 0,02 ≤ 0,04 | > 0,04 ≤ 0,09 | > 0,09 | ||
| D ≤ 219,1 | ± 1% or ± 0.5mm whichever is the greater | (+ 28%,0) or (+ 0.8 mm,0) whichever is the greater | |||
| D > 219,1 | + 50% 0 | + 35% 0 | + 28% 0 | + 22% a 0 | |
| 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 | |||||
Tolerances on inside diameter and minimum wall thickness
| Tolerances on inside diameter | Tolerances on T min for a T min /d ratio | |||
| d | d min | ≤ 0,05 | > 0,05 ≤ 0,1 | > 0,1 |
| ± 1% or ± 2 mm whichever is the greater | (+2%,0) or (+ 4 mm,0) whichever is the greater | + 35% 0 | + 28% 0 | + 22% a 0 |
| 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 | ||||
Tolerances on exact lengths
Dimension in mm
| Length L | Tolerance on exact length |
| L ≤ 6000 | +10 0 |
| 6000 < L ≤ 12 000 | +15 0 |
| L > 12 000 | + by agreement 0 |
Testing
(1)Chemical analysis
(2)Tensile test(Tensile test at room temperature, Tensile test at elevated temperature)
(3)Flattening test
(4)Ring tensile test
(5)Drift expanding test
(6)Ring expanding test
(7)Impact test
(8)Leak tightness test(Hydrostatic test, Electromagnetic test)
(9)Dimensional inspection
(10) Visual examination
(11) Non-destructive testing
Marking
Marking to be applied
The marking shall be indelibly marked on each tube at least at one end. For tubes with outside diameter D ≤ 51 mm the marking on tubes may be replaced by the marking on a label attached to the bundle or box.
Protection
The tubes will be delivered with A temporary protective coating or durable coating and/or lining
Ordering Information
Mandatory information
a) the quantity (mass or total length or number);
b) the term “tube”;
c) the dimensions ;
d) the designation of the steel grade in accordance with this Part of EN 10216 ;
e) the test category for non-alloy steel .
Options
1) Cold finishing.
2) Restriction on copper and tin content.
3) Product analysis.
4) Impact testing .
5) Longitudinal impact testing at -10° C for non-alloy steel grades.
6) Tensile testing at elevated temperature