EN 10216-2 P265GH Sseamless 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 for pressure purposes   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, Treaded   The steel name of non-alloy steel grades (1)The capital letter P for pressure purposes; (2)The symbols GH for elevated temperature.   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%
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%
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% 0
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% 0
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

  TESTINGS (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  

The “GH” in the grade signifies its suitability for high-temperature service.EN10216-2 Seamless steel tubes are predominantly used in:

• Boiler Systems: Manufacturing of boiler water walls, smoke tubes, and economizers.

• Heat Exchangers: Used in shells and tubes where heat transfer occurs between two fluids at high pressure.

• Power Plants: High-pressure steam pipelines and headers connecting turbines and boilers.

• Oil & Gas Refineries: Transporting hot gases and volatile liquids through distillation and refining units.

• Petrochemical Industry: Processing equipment that must resist deformation under constant thermal stress.

• Pressure Vessels: Construction of storage tanks and reservoirs for high-pressure industrial fluids.

  When ordering these tubes for specific applications, you will often see two test categories: TC1: Standard testing. Suitable for most general pressure applications. TC2: Includes mandatory Ultrasonic (US) Testing for longitudinal defects. Required for “unlimited” pressure service or critical safety environments.