EN 10216-1, DIN 2448 / DIN 1629

EN 10216-1, DIN 2448 / DIN 1629 Seamless non-alloy steel tubes for pressure purposes with specified room temperature properties – line pipes

Steel pipes for pressure and thermal purposes with specified room temperature properties – line pipes.

The pipes are used almost in all fields of industry. Thanks to their variety of types and sizes, they can also be used for general purposes. The pipes are manufactured through hot rolling or cold drawing.

Types used Details: Table 1
Dimensions and tolerances Details: Table 2
Pipe lengths Pipes with precise lengths are manufactured with the following tolerance values:
– for pipes 0-6m -0/+10% – for pipes 6-12m -0/+15% – for pipes longer than 12m -0/ to be negotiated
Tightness Pipes should be subject to water testing (7Mpa) or electromagnetic testing.
Straightness < 0,0015 of pipe length (below 3mm per every meter of pipe length)
Tests Details: Table 3

The pipes are manufactured with the diameters between 21,3 – 660 mm and with the wall thickness of up to 100 mm in the case of hot rolling, and with the diameters between 10,2 – 108 mm and the wall thickness of up to 12,5 mm in the case of cold drawing.

Table 1
Pipe types Steel grades Mechanical properties Resilience
Upper yield limit Re min for wall thickness T mm Tensile strength Rm Elongation
A min
Minimum energy average absorbed KV J at the temperature of 0°C
T<\=16 16<T<\=40 40<T<\=60 1 t
MPa MPa MPa MPa 1 t 0 -10 0
Line pipes
P195TR1, P195TR2, P235TR1, P235TR2, P265TR1, P265TR2
P195TR1 195 185 175 320-440 27 25
P195TR2 195 185 175 320-440 27 25 40 28 27
P235TR1 235 225 215 360-500 25 23
P235TR2 235 225 215 360-500 25 23 40 28 27
P265TR1 265 255 245 410-570 21 19
P265TR2 265 255 245 410-570 21 19 40 28 27

 

Steel grades CHEMICAL COMPOSITION (LADLE ANALYSIS) 
C% max Si% max Mn% max P% max S% max Cr% max Mo% max Ni% max Al. cał% min Cu% max Nb% max Ti% max V% max Cr + Cu+ Mo +Ni % MAX
P195TR1 0,13 0,35 0,70 0,025 0,020 0,030 0,08 0,030 0,030 0,010 0,04 0,02 0,70
P195TR2 0,13 0,35 0,70 0,025 0,020 0,030 0,08 0,030 0,02 0,030 0,010 0,04 0,02 0,70
P235TR1 0,16 0,35 1,20 0,025 0,020 0,030 0,08 0,030 0,030 0,010 0,04 0,02 0,70
P235TR2 0,16 0,35 1,20 0,025 0,020 0,030 0,08 0,030 0,02 0,030 0,010 0,04 0,02 0,70
P265TR1 0,20 0,40 1,40 0,025 0,020 0,030 0,08 0,030 0,030 0,010 0,04 0,02 0,70
P265TR2 0,20 0,40 1,40 0,025 0,020 0,030 0,08 0,030 0,02 0,030 0,010 0,04 0,02 0,7

Table 2
Outside diameter and wall thickness tolerances
Outside diameter D mm Permissible deviations of outside diameter D Permissible deviations of wall thickness t depending on the T/D ratio
<\=0,025 >0,025
<\=0,050
>0,050
<\=0,10
>0,10
D<\=219,1 +\- 1% or =\- 0,5mm depending on which is greater +\- 12,5% or 0,4 mm depending on which is greater
D>219,1 =\- 20% =\- 15% =\- 12,5% =\- 10%
For the outside diameter of D>\=355,6 mm, local deviation outside of the upper deviation limit by further 5% of the wall thickness T is permitted

Table 3

Summary of quality inspections and tests TR1

Inspection and test type Test frequency
Internal inspection Acceptance inspection
Mandatory tests Ladle analysis One representative result for the deliveries One ladle
Tensile testing One per every tested batch
Tightness testing Every pipe
Dimensional testing
Dimension verification
Optional tests Wall thickness measurement at a distance from pipe ends

Summary of quality inspections and tests TR2

Inspection and test type Test frequency
Mandatory tests Ladle analysis One ladle
Tensile testing One per every tested batch
Resilience testing at the temperature of  0ºC
Tightness testing Every pipe
Dimensional testing
Visual inspection
Optional tests Ladle analysis One ladle
Resilience testing on longitudinal samples at the temperature of -10ºC One per every tested batch
Wall thickness measurements at a distance from pipe ends
Non-destructive testing in order to identify any longitudinal discontinuity Every pipe
DIN2448/DIN1629

The pipes are used almost in all fields of industry. Thanks to their variety of types and sizes, they can also be used for general purposes. The pipes are manufactured through hot rolling or cold drawing.

Mechanical properties
Pipe types Steel grades Upper yield limit Re min for wall thickness in mm min Tensile strength Rm MPa Elongation A% min
ROUND SEAMLESS CARBON STEEL PIPES FOR SPECIAL REQUIREMENTS
St37.0, St44.0, St52.0
according to DIN 1629
16 16 40 40 65 1 t
St37.0 235 225 215 350-480 25 23
St44.0 275 265 255 420-550 21 19
St52.0 355 345 335 50-650 21 19

 

CHEMICAL COMPOSITION (LADLE ANALYSIS)
Steel grades Weld deoxidation type ( semi-killed steel only) RR special killed C% P% S% N% Addition of nitrogen binding elements e.g. min 0,020% total Al
St37.0 R 0,17 0,040 0,040 0,009
St44.0 R 0,21 0,040 0,040 0,009
St52.0 RR 0,22 0,040 0,035 YES

 

Tests Test scope Test execution status Material test certification type
No Type
1 Tensile testing 1 pipe from the batch
1 try
To be negotiated DIN 50049 3.1.A OR DIN 50049 3.1.B OR DIN 50049 3.1 C
2 Ring testing From one pipe end for testing according to 1 for wall thickness of 40mm, 1 try To be negotiated DIN 50049 3.1.A OR DIN 50049 3.1.B OR DIN 50049 3.1 C
3 Tightness testing All pipes Manufacturer DIN 50049 2.1
4 Surface inspection All pipes To be negotiated DIN 50049 3.1.A OR DIN 50049 3.1.B OR DIN 50049 3.1 C
5 Dimensional testing All pipes To be negotiated DIN 50049 3.1.A OR DIN 50049 3.1.B OR DIN 50049 3.1 C
6 Check analysis After negotiation Manufacturer DIN 50049 3.1.B