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Centerway steel co., ltd
a252 pipe,ssaw pipe china,piling steel pipe

  • EN 10208


    EN 10208 carbon steel pipes are designed for transporting gas, oil, and other combustible fluids under specific pressures in industries such as mining, chemical processing, and power engineering.

    Steel grades used requirement class A

    L210GA

    L235GA

    L245GA

    L290GA

    L360GA

    Pipe types and the manufacturing process (original material, plastic forming and thermal processing state)

    Pipe type

    Original material

    Plastic forming of the pipe1)

    Thermal processing state

    Thermal processing symbol

    Seamless (S)

    Ingot or block

    Hot rolling

    Normalization or normalization plastic forming

    N

    Heat treatment

    Q

    Hot rolling and cold finishing

    Normalization

    N

    Heat treatment

    Q

    High frequency welding (HFW)

    Normalized rolled strips

    Cold forming

    Normalization of the weld area

    N

    Thermomechanically rolled strips

    Heat treated weld area

    M

    Hot rolled strips or normalized rolled strips

    Cold forming and reduction with hot tensioning at controlled temperature so as to achieve a normalized state

    Normalization (whole pipe)

    N

    -

    N

    Submerged arc welding (SAW) -longitudinal (SAWL) -spiral (SAWH) or combined welding (COW) -longitudinal (COWL) –spiral (COWH_

    Normalized or normalized rolled sheets or strips

    Cold forming

    -

    N

    Thermomechanically rolled sheets or strips

    Rolled sheets or strips

    Normalization plastic forming

    -

    M

    Normalized or normalized rolled sheets or strips

    N

    Chemical composition according to the ladle analysis for the wall thickness of < or= 25mm

    Steel designation

    Maximum content, %

    CEV max.

    Steel symbol

    C

    Si

    Mn

    P

    S

    V

    Nb

    Ti

    Other

    Steels for seamless and welded pipes

    L245NB 
    L290NB 
    L360NB 
    L415NB

    0,16
    0,17
    0,20
    0,21

    0,40
    0,40
    0,45
    0,45

    1,1
    1,2
    1,6
    1,6

    0,025
    0,025
    0,025
    0,025

    - 
    0,05 
    0,10 
    0,15

    - 
    0,05
    0,10
    0,15

    - 
    0,05
    0,05
    0,05

    - 
    0,04
    0,04
    0,04

     

    0,42 
    0,42 
    0,42 
    0,45 
    to be negotiated

    Steels for seamless pipes

    L360QB 
    L415QB 
    L450QB 
    L485QB 
    L555QB

    0,16
    0,16
    0,16
    0,16
    0,16

    0,45
    0,45
    0,45
    0,45
    0,45

    1,4
    1,6
    1,6
    1,7
    1,8

    0,025
    0,025
    0,025
    0,025
    0,025

    0,020
    0,020
    0,020
    0,020
    0,020

    0,05
    0,08
    0,09
    0,10
    0,10

    0,05
    0,05
    0,05
    0,05
    0,06

    0,04
    0,04
    0,06
    0,06
    0,06

     

    0,42 
    0,43 
    0,45 
    0,45 
    to be negotiated

    Steels for welded pipes

    L245MB 
    L290MB 
    L360MB 
    L415MB 
    L450MB 
    L485MB 
    L555MB

    0,16
    0,16
    0,16
    0,16
    0,16
    0,16
    0,16

    0,45
    0,45
    0,45
    0,45
    0,45
    0,45
    0,45

    1,5
    1,5
    1,6
    1,6
    1,6
    1,7
    1,8

    0,025
    0,025
    0,025
    0,025
    0,025
    0,025
    0,025

    0,020
    0,020
    0,020
    0,020
    0,020
    0,020
    0,020

    0,04
    0,04
    0,05
    0,08
    0,10
    0,10
    0,10

    0,4 
    0,4 
    0,5 
    0,5 
    0,5 
    0,6 
    0,6

    - 
    - 
    0,04
    0,06
    0,06
    0,06
    0,06

     

    0,40 
    0,40 
    0,41 
    0,42 
    0,43 
    0,43 
    to be negotiated

    Required tension and bending test results for the wall thickness of < or = 25mm and of the pressure water test

    Steel designation

    Pipe body (seamless pipe and welded pipe)

    Spiral weld

    Whole pipe

    HFW, SAW, COW

    SAW, COW

    Steel symbol

    Plastic limit R 10,5N/mm 2

    Tensile strength R mN/mm 2min.

    R10,5/RmMax

    Elongation A% min.

    Tensile strength R mN/mm 2min

    Diameter of the bending mandrel bar in the bending test

    Pressure water test

    L245NB 
    L245MB

    245 to 440

    415

    0,80 
    0,85

    22

    The same values as for the pipe body apply

    3T

    Every pipe should be subject to the test and it should be free of any leaks or deformations

    L290NB 
    L290MB

    290 to 440

    415

    0,85 
    0,85

    21

    3T

    L360NB 
    L360QB 
    L360MB

    360 to 510

    460

    0,85 
    0,88 
    0,85

    20

    4T

    L415NB 
    L415QB 
    L415MB

    415 to 565

    520

    0,85 
    0,88 
    0,85

    18

    5T

    L450QB 
    L450MB

    450 to 570

    535

    0,90 
    0,87

    18

    6T

    L485QB 
    L485MB

    485 to 605

    570

    0,90 
    0,90

    18

    6T

    L555QB 
    L555MB

    555 to 675

    625

    0,90 
    0,90

    18

    6T


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