Products

LSAW Steel Pipe

LSAW Steel Pipe

    LSAW (Longitudinal double submerge arc welding) carbon steel pipe is a type of SAW pipe made of steel plates that were hot rolled by JCOE or UOE forming technology. JCOE technology represents the shaping and forming processes involved during manufacturing as well as the inner and outer welding and cold expansion carried out after welding.

    Material of LSAW Steel Pipe
    Pipe Standard  API 5L  PSL1/PSL2    Gr.A,Gr.B,X42,X46,X52,X56,X60,X65,X70
     ASTM A53    ASTM  572    ASTM A252  
     AN/NZS 1163   AN/NZS 1074
     EN10219-1        EN10217-1
    Size  OD: 219mm-1625mm
     WT: 7-50mm
     LENGTH: 5.8/6/11.8/12m

    Application of LSAW Steel Pipe
    Used for oil/gas/water
    Transmission
    Engineering
    Offshore projects.



     

    Manufacturing Process of LSAW steel pipe
    Longitudinally Submerged Arc Welded Process Flow
    LSAW (Longitudinally Submerged Arc Welded Steel pipes) in leaflets plate as raw material, the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production.

    UOE LSAW pipe forming process:

    The three main forming processes of UOE LSAW steel pipe forming process include: steel plate pre-bending, U forming and O forming. Each process adopts a dedicated forming press to complete the three processes of pre-bending the edge of the steel plate, U forming and O forming in sequence to deform the steel plate into a circular tube.

    JCOE LSAW pipe forming process:
    Forming: After several steps of stamping on the JC0 forming machine, first half of the steel plate is pressed into a "J" shape, then the other half of the steel plate is pressed into a "J" to form a "C" shape, and finally pressurized from the middle to form An open "0"-shaped tube blank is formed.


    LSAW Pipes with JCOE forming mode:




    Production equipment of LSAW steel pipe
    Plate edge milling machine
    The milling machine mills the two sides of the plate to exacting standards in order to meet width, edging and groove shape specifications.

    Edge crimping machine
    The crimping machine crimps the edges of the plate to form the required curvature.

    Tack welding machine
    The two edges of the open seam pipe are brought together by the tack welding machine. then welded by the tack welder using a metal active - gas arc welding("MAG" )process.

    Forming machine
    Utilizes the "JCO" process to bend and form the crimped steel plate into a steel pipe.

    Interior welding machine
    The interior longitudinal seam of the pipe is welded from the inside by fixing 4 welding heads while moving pipe and using submerged-arc welding process.

    End facing machine
    The machine levels the pipe end with rotating cutter heads to ensure that required groove and edge specifications are met.

    Hydrostatic tester
    Using end face sealing technology eliminates blind zones during hydrostatic testing. The tester is also equipped with automatic recording and storing functions.

    Expanding machine
    The pipe is subjected to full-length expansion to increase the precision of the pipe dimensions and to improve the internal stress distribution.




    Tests of LSAW steel pipe
    Chemical Component Analysis
    Mechanical Properties – Elongation, Yield Strength, Ultimate Tensile Strength
    Technical Properties – DWT Test, Impact Test, Blow Test, Flattening Test
    X-ray Test
    Exterior Size Inspection
    Hydrostatic Test
    UT Test

    Transportation of LSAW steel pipe
    When transporting, loading and unloading erw welded pipes, special hoisting and transportation tools should be used to avoid scratching the surface.

     

    Out Diameter                                         Wall Thickness
    16"~72"                                                                              6mm ~ 75mm
     

    O.D.

    W.T.

    Length(m)

    Inch

    mm

    Min.Yield Strength(Mpa)

    Inch

    mm

    245(B)

    290(X42)

    360(X52)

    415(X60)

    450(X65)

    485(X70)

    555(X80)

    16

    406

    6.0-14.0

    6.0-13.0

    6.0-12.0

    6.0-11.0

    6.0-10.5

    6.0-10.0

    6.0-9.0

    6.0-12.3

    18

    457

    6.0-15.0

    6.0-14.0

    6.0-13.0

    6.0-12.0

    6.0-11.5

    6.0-11.0

    6.0-10.0

    6.0-12.3

    20

    508

    6.0-16.0

    6.0-15.0

    6.0-14.0

    6.0-13.0

    6.0-12.5

    6.0-12.0

    6.0-11.0

    6.0-12.3

    22

    559

    6.0-17.0

    6.0-16.0

    6.0-15.0

    6.0-14.0

    6.0-13.5

    6.0-13.0

    6.0-12.0

    6.0-12.3

    24

    610

    6.0-18.0

    6.0-17.0

    6.0-16.0

    6.0-15.0

    6.0-14.5

    6.0-14.0

    6.0-13.0

    6.0-12.3

    26

    660

    6.0-19.0

    6.0-18.0

    6.0-17.0

    6.0-16.0

    6.0-15.0

    6.0-15.0

    6.0-14.0

    6.0-12.3

    28

    711

    6.0-20.0

    6.0-19.0

    6.0-18.0

    6.0-17.0

    6.0-16.5

    6.0-16.0

    6.0-15.0

    6.0-12.3

    30

    762

    7.0-21.0

    7.0-20.0

    7.0-19.0

    7.0-18.0

    7.0-17.5

    7.0-17.0

    7.0-16.0

    6.0-12.3

    32

    813

    7.0-22.0

    7.0-21.0

    7.0-20.0

    7.0-19.0

    7.0-18.5

    7.0-18.0

    7.0-17.0

    6.0-12.3

    34

    864

    7.0-23.0

    7.0-22.0

    7.0-21.0

    7.0-20.0

    7.0-19.5

    7.0-19.0

    7.0-18.0

    6.0-12.3

    36

    914

    8.0-24.0

    8.0-23.0

    8.0-22.0

    8.0-21.0

    8.0-20.5

    8.0-20.0

    8.0-19.0

    6.0-12.3

    38

    965

    8.0-25.0

    8.0-24.0

    8.0-23.0

    8.0-22.0

    8.0-21.5

    8.0-21.0

    8.0-20.0

    6.0-12.3

    40

    1016

    8.0-26.0

    8.0-25.0

    8.0-24.0

    8.0-23.0

    8.0-22.5

    8.0-22.0

    8.0-21.0

    6.0-12.3

    42

    1067

    8.0-26.0

    8.0-25.0

    8.0-24.0

    8.0-23.0

    8.0-22.5

    8.0-22.0

    8.0-21.0

    6.0-12.3

    44

    1118

    9.0-27.0

    9.0-26.0

    9.0-24.5

    9.0-23.5

    9.0-22.8

    9.0-22.0

    9.0-21.0

    6.0-12.3

    46

    1168

    9.0-27.0

    9.0-26.0

    9.0-24.0

    9.0-23.5

    9.0-22.8

    9.0-22.0

    9.0-21.0

    6.0-12.3

    48

    1219

    9.0-28.0

    9.0-27.0

    9.0-25.4

    9.0-24.0

    9.0-23.5

    9.0-23.0

    9.0-22.0

    6.0-12.3

    52

    1321

    9.0-28.0

    9.0-27.0

    9.0-25.4

    9.0-24.2

    9.0-23.5

    9.0-23.0

    9.0-22.0

    6.0-12.3

    56

    1422

    10.0-29.0

    10.0-28.0

    10.0-26.0

    10.0-24.5

    10.0-23.8

    10.0-23.0

    10.0-22.0

    6.0-12.3

    60

    1524

    10.0-29.0

    10.0-28.0

    10.0-26.0

    10.0-24.5

    10.0-23.8

    10.0-23.0

    10.0-22.0

    6.0-12.3

    64

    1626

    10.0-30.0

    10.0-29.0

    10.0-27.0

    10.0-25.4

    10.0-24.8

    10.0-24.0

    10.0-23.0

    6.0-12.3

    68

    1727

    10.0-30.0

    10.0-29.0

    10.0-27.0

    10.0-25.4

    10.0-24.8

    10.0-24.0

    10.0-23.0

    6.0-12.3

    72

    1829

    10.0-30.0

    10.0-29.0

    10.0-27.0

    10.0-25.4

    10.0-24.8

    10.0-24.0

    10.0-23.0

    6.0-12.3

    API 5L GR.B LSAW Steel PipeASTM A252 LSAW Steel Pipe

Know more about this product price, catalogue, mill test certificate,  please inquiry to: sales@nan-steel.com

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