EN 10216-2 P235GH SEAMLESS STEEL TUBES

EN 10216-2 P235GH 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 P235GH Seamless steel tubes for pressure purposes

EN 10216-2 P235GH 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 P235GH 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	Heat treatment a	Temperature °C	Cooling Medium	Temperature °C	Cooling medium
P235GH	1.0345	+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 P235GH

Steel grade	Steel number	C	Si	Mn	P max	S max	Cr	Mo	Ni
P235GH	1.0345	≤ 0,16	≤ 0,35	≤ 1,20	0,025	0,020	≤ 0,30	≤ 0,08	≤ 0,30

Al tot	Cu	Nb	Ti max	V	Cr+Cu+Mo+Ni	Others
≥ 0,020	≤ 0,30	≤ 0,010	0,040	≤ 0,02	≤ 0,70	–

Mechanical properties of EN 10216-2 P235GH

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 *
P235GH	1.0345	235	225	215	–	360 to 500	25	23

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	± 1% or ± 0.5mm 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 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