EN 10216-1 P235 Seamless steel tubes for pressure purposes
 
 
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
 
Additional Info
Port of Shipment: Tianjin, China
Payment Terms:T / T, LC
Delivery: 7-15 days after payment
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
 
 
 
Manufacturing process
Steels shall be fully killed.
NOTE :This excludes the use of rimming, balanced or semi-killed steel.
 
 
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 b max.	Mo b max	Ni b max.	Al tot min.	Cu b c max	Nb b max.	Ti b max.	V b max.	Cr+Cu+Mo+Ni b max.
P235TR2	1.0255	0,16	0,35	1,20	0,025	0,015	0,30	0,08	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	Ni b max.	Al tot min.	Cu b c max	Nb b max.	Ti b max.	V b max.	Cr+Cu+Mo+Ni b max.
P235TR1	1.0254	0,16	0,35	1,20	0,025	0,020	0,30	0,08	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				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				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
 
Tolerances 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 % 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 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

 
 
 
Preferred dimensions of EN 10216-1 Seamless steel tubes
 
Dimensions in millimetres
 
 

   
 
Table 7 (continued)
Dimensions in millimetres
 

   
 
 
 
 
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
 
 
 
Marking
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.
 
 
Photos of EN 10216-1 P235 Seamless steel tubes
 
 

 
Ordering Information
Mandatory information
(1)the quantity (mass or total length or number);
(2) the term “tube”;
(3) the dimensions (outside diameter D and wall thickness T) ;
(4)steel grade of EN 10216 .
 
 
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;