EN 10216-1 P235 SEAMLESS STEEL TUBES FOR PRESSURE PURPOSES

EN 10216-1 P235 Seamless Steel Tubes for Pressure Purchases

Standard:EN 10216-1 Seamless steel tubes for pressure purposes – Technical delivery conditions – Part 1: Non-alloy steel tubes with specified room temperature properties

EN 10216-1 Standard specifies the technical delivery conditions for two qualities TR1 and TR2 of seamless tubes of circular cross section with specified room temperature properties made of non-alloy quality steel.

EN 10216-1 P235 Seamless steel tubes for pressure purposes,Non-alloy steel tubes with specified room temperature properties.

EN 10216-1 P235 Seamless steel tubes for pressure purposes Quick Details
Manufacture:Seamless process
Out Dimensions: 14mm-509mm
Wall Thickness: 2mm-50mm
Length: Fixed(6m,9m,12,24m) or normal length(5-12m)
Ends: Plain End, Beveled End, Treaded

The steel name:
(1)the capital letter P for pressure purposes;
(2)the alphanumeric TR1 for qualities without specified aluminium content, impact properties and specific inspection and testing requirements ;
(3)the alphanumeric TR2 for qualities with specified aluminium content, impact properties and specific inspection and testing requirements.

Tube manufacture and delivery conditions
EN 10216-1 P235 Seamless steel tubes will be manufactured by a seamless process. The forming operations and delivery conditions are shown in Table 1.

Table 1 — Forming operations and delivery conditions

Forming operation	Quality	Delivery condition
Hot formed	TR1	As formed or normalized or normalizing-formed
	TR2	Normalized or normalizing-formed
Hot formed + cold finished	TR1 and TR2	Normalized

Chemical composition of EN 10216-1 P235
Chemical composition (cast analysis) a in % by mass for quality TR2

Steel grade	Steel number	C max.	Si max.	Mn max.	P max.	S max.	Cr max.	Mo max
P235TR2	1.0255	0,16	0,35	1,20	0,025	0,015	0,30	0,08

Ni max.	Al tot min.	Cu max	Nb max.	Ti max.	V max.	Cr+Cu+Mo+Ni max.
0,30	0,02 d	0,30	0,010	0,04	0,02	0,70

Chemical composition (cast analysis) a in % by mass for quality TR1

Steel grade	Steel number	C max.	Si max.	Mn max.	P max.	S max.	Cr b max.	Mo b max
P235TR1	1.0254	0,16	0,35	1,20	0,025	0,020	0,30	0,08

Ni max.	Al tot min.	Cu max	Nb max.	Ti max.	V max.	Cr+Cu+Mo+Ni max.
0,30	–	0,30	0,010	0,04	0,02	0,70

Mechanical properties of EN 10216-1 P235

Mechanical properties for quality TR2

Steel grade		Tensile properties						Impact properties
Steel name	Steel number	Upper yield strength R eH b min. for Wall Thickness T mm			Tensile Strength R m	Elongation A min. % b c		Minimum average absorbed energy KV 2 J at a temperature of °C c
		T ≤ 16	16 < T ≤ 40	40 < T ≤ 60	Tensile Strength R m	Elongation A min. % b c		l		t
		MPa *	MPa *	MPa *	MPa *	l	t	0	-10	0
P235TR2	1.0255	235	225	215	320 to 440	25	23	40	28 d	27

Note: l = longitudinal t = transverse

Mechanical properties for quality TR1

Steel grade		Tensile properties						Impact properties
Steel name	Steel number	Upper yield strength R eH b min. for Wall Thickness T mm			Tensile Strength R m	Elongation A min. % b c		Minimum average absorbed energy KV 2 J at a temperature of °C c
		T ≤ 16	16 < T ≤ 40	40 < T ≤ 60	Tensile Strength R m	Elongation A min. % b c		l		t
		MPa *	MPa *	MPa *	MPa *	l	t	0	-10	0
P235TR1	1.0254	235	225	215	360 to 550	25	23	–	–	–

Note: l = longitudinal t = transverse

Tolerances of EN 10216-1 Seamless steel tubes on outside diameter and on wall thickness

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 ± 0,5 mm whichever is the greater	± 12,5 % or ± 0,4 mm 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 exact lengths

Length L	Tolerance on exact length
L ≤ 6 000	+ 10 0
6 000 < L ≤ 12 000	+15 0
L > 12 000	+by agreement 0

Inspection
Types of inspection
non-specific or specific inspection for quality TR1;
specific inspection for quality TR2.

Testings
(1)Chemical analysis
(2)Tensile test
(3)Impact test
(4)Leak tightness test(Hydrostatic test)
(5)Electromagnetic test
(6)Dimensional inspection
(7)Visual examination
(8)Non-Destructive Testing

Options
1) Delivery condition normalized or normalizing-formed for TR1;
2) restriction on copper and tin contents;
3) product analysis;
4) verification of longitudinal impact testing at −10 °C for quality TR2 ;
5) selection of method for verification of leak-tightness ;
6) Non-Destructive Testing for quality TR2 ; the test method shall be specified by the purchaser;
7) special end preparation ;
8) exact lengths ;
9) test unit restriction for tubes with D ≤ 76,1 mm of quality TR2 ;
10) wall thickness measurement away from the ends;
11) additional marking;