EN Standard LSAW Steel Pipe is widely applied in steel structure, power plant, ship building, foundation and piling projects.
Longitudinal Submerged-Arc Welded Steel Pipe
Usage: Used for low pressure liquid delivery, such as water, gas, and oil.
Process:
LSAW - UO(UOE)、RB(RBE)、JCO(JCOE)
DSAW -Double Submerged arc welded
Standard: API 5L, API 5CT, ASTM 53, EN10217, DIN 2458. IS 3589, GB/T3091, GB/T9711
Certificate: API 5L PSL1 / PSL2, API 5CT
Out Diameter: 355.6mm– 1626mm
Wall Thickness: 8 -50mm
Length: up to 12m
Steel Grade:
API 5L: GR B, X42,X46, X56, X60,X65,X70
ASTM A53: GR A, GR B, GR C
EN: S275, S275JR, S355JRH, S355J2H
Surface: Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer’s requirement
Test: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.
Mill Test Certificate: EN 10204
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Usage |
Piling, construction, low-pressure liquid delivery, such as water, gas, and oil. |
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Standard |
API 5L PSL1/ PSL2 , ASTM A252, EN10219, AWWA C200, ASTM A53, BS, JIS, etc... |
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ASTM A 53 |
Gr. A, Gr B, Gr C, Gr.D |
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API 5L |
A, B, X42, X46, X52, X56, X60, X65 X70 |
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GB/T9711 |
L175, L210, L245, L290, L320, L360, L290, L320, L360, L390, L415, L450, L485, L555 |
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ASTM A252 |
Gr.1 Gr.2 Gr.3 |
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EN 10219 |
S235JR, S275JR, S355JR, S355JOH, S355J2, S420... |
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Outer Diamter |
323mm - 3000mm |
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Wall Thickness |
4 mm - 25.4mm |
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Length |
Up to 75m |
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CONTACT US |
Email : [email protected] |
| Usage | O.D.(mm) | W.T.(mm) | Length(m) |
| Oil &gas pipeline | 406-1524(16” – 60”) | 6-40 (1/4” – 1.57”) | 8-12.1 |
| for Construction(Pipe Piles) | 350-1600(14” – 63”) | 6-60 (1/4” – 2.36”) | 6-12 |
| Roller pipe | 1200-3800(47.24” – 150”) | 12-120 (1/2”- 4.7”) | <=3.2 |
| Addition to above specification, the pipes can be produced according to customer’s requirements | |||
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.
The LSAW process of welded tube includes UOE and JCOE
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 EN S355 LSAW Steel Pipe for Piling Construction, special hoisting and transportation tools should be used to avoid scratching the surface.Feel free to contact us any time Email : [email protected]
