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LSAW Steel Pipe (Longitudinally Submerged Arc Welding Pipe)

LSAW Steel Pipe (Longitudinally Submerged Arc Welding Pipe)

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LSAW Steel Pipe (Longitudinally Submerged Arc Welding 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

LSAW PIPE APPLICATIONS

CIVIL CONSTRUCTION:

Structural pipes for stadiums, bridges and buildings.

SPECIAL ITEMS:

Mother pipes for bends, pipes for slug catcher facilities (including HIC & SSC). Prefabricated tubular elements ready to be assembled at the construction yard.

ONSHORE PLANTS:

Pipes processed for the petrochemical industry, oil and gas treatments plants, power plants and reactors, oil and gas refineries, and LNG terminals.

OFFSHORE STRUCTURES:

Pipes, piles, cans and cones for offshore platform jackets. Topsides and foundation jackets for wind farms.

Longitudinally welded steel pipes are used in onshore and offshore oil and gas pipelines requiring critical service, high performance and tight tolerances. LSAW pipe are also used in conveyance of flammable & nonflammable liquids, and as structural members in construction projects.

 

Tolerance of Outside Diameter and Wall Thickness

TypesStandard
SY/T5040-2000SY/T5037-2000SY/T9711.1-1977ASTM A252AWWA C200-97API 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%TD<508mm, ±12.5%T-8%T~+19.5%T<-12.5%T-8%T~+19.5%T5.0mm<t<15.0mm, ±0.11<=”” p=””></t<15.0mm,>
D>508mm, ±10.0%TT≥15.0mm, ±1.5mm

Chemical Composition and Mechanical Properties of LSAW Steel Pipe

StandardGradeChemical Composition(max)%Mechanical Properties(min)
CMnSiSPYield Strength

(Mpa)

Tensile Strength

(Mpa)

GB/T700-2006A0.221.40.350.0500.045235370
B0.21.40.350.0450.045235370
C0.171.40.350.0400.040235370
D0.171.40.350.0350.035235370
GB/T1591-2009A0.21.70.50.0350.035345470
B0.21.70.50.0300.030345470
C0.21.70.50.0300.030345470
BS En10025S235JR0.171.40.0350.035235360
S275JR0.211.50.0350.035275410
S355JR0.241.60.0350.035355470
DIN 17100ST37-20.20.0500.050225340
ST44-20.210.0500.050265410
ST52-30.21.60.550.0400.040345490
JIS G3101SS4000.0500.050235400
SS4900.0500.050275490
API 5L PSL1A0.220.90.030.03210335
B0.261.20.030.03245415
X420.261.30.030.03290415
X460.261.40.030.03320435
X520.261.40.030.03360460
X560.261.10.030.03390490
X600.261.40.030.03415520
X650.261.450.030.03450535
X700.261.650.030.03585570

lSAW ( Welded Pipes )Manufacturing Process

UOE is a method used for production of longitudinally welded large diameter pipes. Longitudinal edges of steel plates are first beveled using carbide milling equipment. Beveled plates are then formed into a U shape using a U-press and subsequently into an O shape using an O-press.

Longitudinal edges of the plates are then tack welded followed by internal and external welds.

Pipes manufactured by this process are subjected to expanding operation in order to relieve internal stresses and obtain a perfect dimensional tolerance.

After the pipes are conveyed to cold expansion, hydrostatic testing and NDT inspection, the pipes will be subject to final inspection for the compliance to customer requirements.

Starting from incoming control up to the final inspection stage; entire process is monitored and supported by computerized system. Traceability is achieved by input controls and barcodes through entire production lines.

Production Flow

Production Range

  • Pipe Diameter : 406 mm – 1,524 mm (16” – 60”)
  • Pipe Length : 6 m – 12.2 m (20” – 40”)
  • Thickness : 8 mm – 65 mm (0.32″ – 2.55″)

COMPANY EQUIPMENT VIEW

Oxy – Plasma cutting machines
Pre bending machine
Press bending machine
Roll bending machine
Tack welding machine
Internal LSAW machines
Milling machine
External LSAW machines
Welding portals
Grinding machine
Sizing press
Post welding heat treatment
End bevelling machines
Pipe cutting machines
AutomaticUT
Bunker RX
Hydrotest machine
Automatic dimensional inspection


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