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  • LSAW Steel Pipe

    LSAW Steel Pipe

    LSAW Steel Pipe (Longitudinally Submerged Arc Welding Pipe)

    Straight Seam Submerged Arc Welded Steel Pipe

    UOE SAWL PIPES

    Outside Diameter:Φ508mm- 1118mm (20"- 44")

    Wall Thickness: 6.0-25.4mm 1/4"-1"
    Quality Standards: API、DNV、ISO、DEP、EN、ASTM、DIN、BS、JIS、GB、CSA
    Length: 9-12.3m (30'- 40')
    Grades: API 5L A-X90,GB/T9711 L190-L625


    JCOE SAWL PIPES

    Outside Diameter:Φ406mm- 1626mm (16" - 64" )
    Wall Thickness:6.0- 75mm (1/4" - 3" )
    Quality Standards:API、DNV、ISO、DEP、EN、ASTM、DIN、BS、JIS、GB、CSA
    Length:3-12.5m ( 10'- 41' )
    Grades:API 5L A-X100, GB/T9711 L190-L690


    Tolerance of Outside Diameter and Wall Thickness

    Types

    Standard

    SY/T5040-2000

    SY/T5037-2000

    SY/T9711.1-1977

    ASTM A252

    AWWA C200-97

    API 5L PSL1

    Tube end OD deviation

    ±0.5%D

    ±0.5%D

    -0.79mm~+2.38mm

    <±0.1%T

    <±0.1%T

    ±1.6mm

    Wall thickness

    ±10.0%T

    D<508mm, ±12.5%T

    -8%T~+19.5%T

    <-12.5%T

    -8%T~+19.5%T

    5.0mm

    D>508mm, ±10.0%T

    T≥15.0mm, ±1.5mm


    Chemical Composition and Mechanical Properties of LSAW Steel Pipe

    Standard

    Grade

    Chemical Composition(max)%

    Mechanical Properties(min)

    C

    Mn

    Si

    S

    P

    Yield Strength

    (Mpa)

    Tensile Strength

    (Mpa)

    GB/T700-2006

    A

    0.22

    1.4

    0.35

    0.050

    0.045

    235

    370

    B

    0.2

    1.4

    0.35

    0.045

    0.045

    235

    370

    C

    0.17

    1.4

    0.35

    0.040

    0.040

    235

    370

    D

    0.17

    1.4

    0.35

    0.035

    0.035

    235

    370

    GB/T1591-2009

    A

    0.2

    1.7

    0.5

    0.035

    0.035

    345

    470

    B

    0.2

    1.7

    0.5

    0.030

    0.030

    345

    470

    C

    0.2

    1.7

    0.5

    0.030

    0.030

    345

    470

    BS En10025

    S235JR

    0.17

    1.4

    -

    0.035

    0.035

    235

    360

    S275JR

    0.21

    1.5

    -

    0.035

    0.035

    275

    410

    S355JR

    0.24

    1.6

    -

    0.035

    0.035

    355

    470

    DIN 17100

    ST37-2

    0.2

    -

    -

    0.050

    0.050

    225

    340

    ST44-2

    0.21

    -

    -

    0.050

    0.050

    265

    410

    ST52-3

    0.2

    1.6

    0.55

    0.040

    0.040

    345

    490

    JIS G3101

    SS400

    -

    -

    -

    0.050

    0.050

    235

    400

    SS490

    -

    -

    -

    0.050

    0.050

    275

    490

    API 5L PSL1

    A

    0.22

    0.9

    -

    0.03

    0.03

    210

    335

    B

    0.26

    1.2

    -

    0.03

    0.03

    245

    415

    X42

    0.26

    1.3

    -

    0.03

    0.03

    290

    415

    X46

    0.26

    1.4

    -

    0.03

    0.03

    320

    435

    X52

    0.26

    1.4

    -

    0.03

    0.03

    360

    460

    X56

    0.26

    1.1

    -

    0.03

    0.03

    390

    490

    X60

    0.26

    1.4

    -

    0.03

    0.03

    415

    520

    X65

    0.26

    1.45

    -

    0.03

    0.03

    450

    535

    X70

    0.26

    1.65

    -

    0.03

    0.03

    585

    570


    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.

    Automated ultrasonic testing equipment
    The superiority of phased arrayultra sonic technology:
    (1 )Adopting electron control method for fast linear scanning or sector scanning without moving probe or moving less. thus greatlyim prove detection efficiency.
    (2)Controlting the sound beam by setting detection angles, its good sound beam reachability can enhances reliability and accuracy of detection.
    (3) Dynamic control the deflection and focus of sound beam realizes the detection of pipes with different wall thickness without replacing probes.

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