LSAW Steel Pipe/Straight Seam Submerged Arc Welded Steel Pipe
Holic® offers LSAW Steel Pipe.
Brand: HOLIC®.
UOE LSAW PIPES:
Outer 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 LSAW PIPES:
Outer 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
Product Description
LSAW Steel Pipe Factory:
Holic Oil Pipeline Co., LTD.
LSAW Steel Pipe Basics:
LSAW Steel Pipe( Longitudinal Seam Submerged Arc Welding Pipe ).(Longitudinally Submerged Arc Welding steel pipe) LSAW steel pipe 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. A wide range of the finished product specifications, weld toughness, ductility, uniformity and dense, with a large diameter, wall thickness, high pressure resistance, low-temperature corrosion resistance, etc. Required steel pipe in the construction of high-strength, high toughness, high-quality long-distance oil and gas pipelines, mostly large diameter thick wall LSAW.
Longitudinally welded steel pipes are used in onshore and offshore oil and gas pipelines requiring critical service, high performance and tight tolerances. LSAW pipes are also used in conveyance of flammable & nonflammable liquids, and as structural members in construction projects.
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<t<15.0mm, ±0.11<=”” p=””></t<15.0mm,> |
| 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.
Our advantages:
As a leading brand of oil pipeline products in China, Holic® is working on providing high quality LSAW steel pipe with most competitive price.
