Structural Steel Pipe Brand Leader

Yuantai Derun certificate
Home / All /

LSAW steel pipe

LSAW steel pipe
LSAW Steel Pipe
What is LSAW steel pipe?
LSAW steel pipe is a steel pipe with longitudinal parallel welds. Usually divided into metric welded steel pipes, welded thin-walled pipes, transformer cooling oil pipes, etc. The production process of longitudinal welded pipe is simple, the production efficiency is high, the cost is low, and the development is fast. Longitudinal submerged arc welded pipes can be divided into high-frequency straight seam steel pipes and submerged arc welded straight seam steel pipes according to the production process. It is divided into UOE, RBE, and JCOE steel pipes. According to different forming methods, the most common forming processes of high-frequency straight seam steel pipes and submerged arc welding straight seam steel pipes are introduced below.
What are the production processes for LSAW steel pipes?
1. Dotting: After the steel plate used for manufacturing large-diameter submerged arc welded straight seam steel pipes enters the production line, the entire plate is first subjected to ultrasonic testing;
2. Edge milling: Double sided milling is performed on the two edges of the steel plate using an edge milling machine to achieve the required plate width, edge parallelism, and groove shape;
3. Pre bending: The pre bending machine pre bends the edges to ensure that the plate edges have the required curvature;
4. Forming: First, press the pre bent half of the steel plate into a "J" shape on the JCO molding machine. The other half of the steel plate is also bent and pressed into a "C" shape, forming an opening. O-shaped
5. Pre welding: After the straight seam welded steel pipe joint is formed, gas shielded welding (MAG) is used for continuous welding;
6. Internal welding: The straight seam steel pipe is welded internally using vertical multi wire submerged arc welding (up to four wires);
7. External welding: Using vertical multi wire submerged arc welding to weld the outer surface of LSAW steel pipes;
8. Ultrasonic testing I: 100% inspection of the internal and external welds of longitudinal welded steel pipes and the base metal on both sides of the weld;
9. X-ray testing I: 100% X-ray industrial television testing of internal and external welds, using an image processing system to ensure detection sensitivity;
10. Expanding: Expanding the full length of submerged arc welded straight seam steel pipes, improving the dimensional accuracy of the steel pipes and improving the internal stress distribution of the steel pipes;
11. Hydrostatic test: Conduct a test on the root diameter of the expanded steel pipe on a hydraulic testing machine to ensure that the steel pipe meets the required test pressure. The machine has automatic recording and storage functions;
12. Chamfer: After passing the inspection, the steel pipe is processed at the pipe end to meet the required pipe end groove size;
13. Ultrasonic testing II: Ultrasonic testing is a one-time inspection of defects that may occur in longitudinally welded steel pipes after expansion and water pressure.
14. X-ray inspection II: X-ray industrial television inspection and pipe end weld inspection of steel pipes after expansion and hydrostatic testing;
15. Magnetic particle inspection of pipe end: This inspection is to discover defects at the pipe end;
16. Anticorrosive coating: Qualified steel pipes shall undergo anti-corrosion coating treatment according to user requirements.
LSAW Steel Pipe Specification Table

外径(O.D.)

壁厚(Wall Thickness)

重量(Weight)

英寸(inch)

毫米(mm)

单位(SCH)

毫米(mm)

英寸(inch)

公斤/(KG/M)

/英尺.( lb/ft)

14”

355.6

10

6.35

0.250

55.25

37.13

14”

355.6

20

7.92

0.312

68.60

46.1

14”

355.6

 

8.74

0.344

75.52

50.75

14”

355.6

STD-30

9.53

0.375

82.16

55.21

14”

355.6

 

10.31

0.406

88.68

59.59

14”

355.6

40

11.13

0.438

95.51

64.18

14”

355.6

XS

12.70

0.500

108.48

72.90

14”

355.6

 

14.27

0.562

121.33

81.53

14”

355.6

60

15.09

0.594

128.00

86.01

14”

355.6

80

19.05

0.750

159.71

107.32

14”

355.6

100

23.83

0.938

196.94

132.34

14”

355.6

 

25.40

1.000

208.92

140.39

14”

355.6

 

26.97

1.062

220.78

148.36

14”

355.6

120

27.79

1.094

226.93

152.49

14”

355.6

140

31.75

1.250

256.13

172.11

14”

355.6

160

35.71

1.406

284.56

191.21

16”

406.4

10

6.35

0.250

63.28

42.52

16”

406.4

 

7.14

0.281

71.01

47.72

16”

406.4

20

7.92

0.312

78.62

52.83

16”

406.4

 

8.74

0.344

86.58

58.18

16”

406.4

STD-30

9.53

0.357

94.21

63.31

16”

406.4

 

10.31

0.406

101.72

68.36

16”

406.4

 

11.13

0.438

109.59

73.64

16”

406.4

XS-40

12.70

0.500

124.55

83.69

16”

406.4

 

14.27

0.562

139.39

93.67

16”

406.4

 

15.88

0.625

154.48

103.80

16”

406.4

60

16.66

0.656

161.74

108.69

16”

406.4

 

17.48

0.688

169.35

113.80

16”

406.4

 

19.05

0.750

183.81

123.52

16”

406.4

 

20.62

0.812

198.15

133.15

16”

406.4

80

21.44

0.844

205.60

138.15

16”

406.4

 

25.40

1.000

241.06

161.98

16”

406.4

100

26.19

1.031

248.05

166.68

16”

406.4

120

30.96

1.219

289.54

194.56

16”

406.4

 

31.75

1.250

296.31

199.11

16”

406.4

140

36.53

1.438

336.57

226.16

16”

406.4

160

40.49

1.594

369.06

247.99

18”

457

20

7.92

0.312

88.60

59.54

18”

457

 

8.74

0.344

97.59

65.58

18”

457

STD

9.53

0.375

106.23

71.38

18”

457

 

10.31

0.406

114.72

77.09

18”

457

30

11.13

0.438

123.62

83.07

18”

457

XS

12.70

0.500

140.56

94.45

18”

457

40

14.27

0.562

157.38

105.75

18”

457

 

15.88

0.625

174.50

117.25

18”

457

 

17.48

0.688

191.38

128.60

18”

457

60

19.05

0.750

207.82

139.65

18”

457

80

23.83

0.938

257.13

172.78

18”

457

 

25.40

1.000

273.08

183.50

18”

457

 

26.97

1.062

288.91

194.14

18”

457

 

28.58

1.125

305.01

204.96

18”

457

100

29.36

1.156

312.76

210.16

18”

457

 

30.18

1.188

320.88

215.62

18”

457

 

31.75

1.250

336.33

226.00

18”

457

120

34.93

1.375

367.25

246.78

18”

457

140

39.67

1.562

412.40

277.12

18”

457

160

45.24

1.781

464.03

311.81

20”

508

 

8.74

0.344

108.70

73.04

20”

508

STD-20

9.53

0.375

118.33

79.51

20”

508

 

10.31

0.406

127.82

85.89

20”

508

 

11.13

0.438

137.76

92.57

20”

508

XS-30

12.70

0.500

156.70

105.3

20”

508

 

14.27

0.562

175.51

117.94

20”

508

40

15.09

0.594

185.28

124.50

20”

508

 

15.88

0.625

194.67

130.81

20”

508

 

17.48

0.688

213.59

143.53

20”

508

 

19.05

0.750

232.03

155.92

20”

508

60

20.62

0.812

250.34

168.22

20”

508

 

25.40

1.000

305.35

205.18

20”

508

80

26.19

1.031

314.33

211.22

20”

508

 

30.18

1.188

359.22

241.38

20”

508

 

31.75

1.250

376.66

253.10

20”

508

100

32.54

1.281

385.40

258.97

20”

508

120

38.10

1.500

445.97

299.67

20”

508

140

44.45

1.750

513.27

344.90

20”

508

160

50.01

1.969

570.54

383.38

22”

559

 

8.74

0.344

119.80

80.5

22”

559

STD-20

9.53

0.375

130.44

87.65

22”

559

XS-30

12.70

0.500

172.83

116.14

22”

559

 

15.88

0.625

214.84

144.37

22”

559

 

17.48

0.688

235.79

158.44

22”

559

 

19.05

0.750

256.23

172.18

22”

559

 

20.62

0.812

276.54

185.83

24”

610

 

8.74

0.344

130.90

87.96

24”

610

STD-20

9.53

0.375

142.55

95.79

24”

610

XS

12.70

0.500

188.96

126.98

24”

610

30

14.27

0.562

211.76

142.30

24”

610

 

15.88

0.625

233.02

157.93

24”

610

40

17.48

0.688

258.00

173.37

24”

610

 

19.05

0.750

280.43

188.44

24”

610

 

20.62

0.812

302.73

203.42

24”

610

60

24.61

0.969

358.87

241.15

24”

610

 

25.40

1.000

369.89

248.55

24”

610

 

26.97

1.062

391.69

263.20

24”

610

 

30.18

1.188

435.90

292.91

24”

610

80

30.96

1.219

442.86

297.59

24”

610

100

38.89

1.531

553.26

371.72

24”

610

120

46.02

1.812

646.52

434.44

24”

610

140

52.37

2.062

727.45

488.82

26”

660

STD

9.53

0.375

154.42

103.77

26”

660

XS-20

12.70

0.500

204.78

137.61

26”

660

 

17.48

0.688

279.77

188.00

26”

660

 

19.05

0.750

304.15

204.38

28”

711

STD

9.53

0.375

166.52

118.90

28”

711

XS-20

12.70

0.500

220.91

148.44

28”

711

 

17.48

0.688

301.98

202.92

28”

711

 

19.05

0.750

328.35

220.64

30”

762

STD

9.53

0.375

178.63

120.03

30”

762

XS-20

12.70

0.500

237.05

159.29

32”

813

STD

9.53

0.375

190.74

128.17

32”

813

XS-20

12.70

0.500

253.18

170.13

34”

864

STD

9.53

0.375

202.84

136.30

34”

864

XS-20

12.70

0.500

269.31

180.97

36”

914

STD

9.53

0.375

214.71

144.28

36”

914

XS-20

12.70

0.500

285.13

191.60

38”

965

STD

9.53

0.375

226.82

152.42

38”

965

XS

12.70

0.500

301.27

202.44

40”

1016

STD

9.53

0.375

238.93

160.55

40”

1016

XS

12.70

0.500

317.40

213.28

42”

1067

STD

9.53

0.375

251.04

168.69

42”

1067

XS

12.70

0.500

333.54

224.13

44”

1118

STD

9.53

0.375

263.14

176.82

44”

1118

XS

12.70

0.500

349.67

234.92

46”

1168

STD

9.53

0.375

275.01

184.80

46”

1168

XS

12.70

0.500

365.49

245.59

48”

1219

STD

9.53

0.375

287.12

192.93

48”

1219

XS

12.70

0.500

381.62

256.43

52”

1321

 

9.53

0.375

311.33

209.20

52”

1321

 

12.70

0.500

413.89

278.12

56”

1422

 

9.53

0.375

335.31

225.32

56”

1422

 

12.70

0.500

445.84

299.59

60”

1524

 

9.53

0.375

359.52

241.50

60”

1524

 

12.70

0.500

478.11

321.27

64”

1626

 

9.53

0.375

383.74

257.86

64”

1626

 

12.70

0.500

510.38

342.96

68”

1727

 

12.70

0.500

542.33

364.43

72”

1829

 

12.70

0.500

574.60

386.11

76”

1930

 

12.70

0.500

606.55

407.58

80”

2032

 

14.27

0.562

717.23

481.95

What are the applications of LSAW steel pipes?
LSAW steel pipes are mainly used in the petroleum industry, chemical industry, power industry, agriculture, urban construction, train stations, subways, pile driving pipes, and so on.
oil industry-LSAW steel pipe application
Chemical industry-LSAW steel pipe application
Power industry-LSAW steel pipe application
Agriculture-LSAW steel pipe
train station-LSAW steel pipe application
city building-LSAW steel pipe application
Bridge-LSAW steel pipe application
Pile driving pipes-LSAW steel pipe application
Tianjin Yuantai Derun Steel Pipe Manufacturing Group LTD-- JCOE LSAW steel pipe
Today we take a look at the Tianjin Yuantai Derun Steel Pipe Manufacturing Group LTD JCOE LSAW steel pipe production line, as well as the LSAW steel pipe production process and applications.

JCOE is a pipe making technology for the production of large diameter thick walled steel pipes, based on a double sided submerged arc welding production process, where the product is milled, pre-bent, bent, seamed, internally welded, externally welded, straightened and flush. The forming process can be broken down into N+1 steps (N being a positive integer), with the steel plate being automatically fed and bent transversely in set steps to achieve CNC progressive J-C-O forming. The steel plate enters the forming machine in the transverse direction, and is driven by the feeding trolley to carry out the first stage of N/2 steps of multi-step bending to achieve the "J" forming of the first half of the steel plate; the second stage first makes the "J" formed steel plate fast transverse feeding to the transverse Specified position, from the other end of the unformed steel plate for another N / 2 steps of multi-step bending, to achieve the second half of the steel plate forming, to complete the "C" forming; Finally, the lower part of the "C" pipe billet bending once to achieve "O" forming, each step of the press, are the basic principle of three-point bending.

JCOE lsaw and hsaw pipes play an important role in large pipeline projects, water and gas transmission projects, urban pipeline network construction, bridge piling, municipal construction and urban construction. In recent years,lsaw line pipe, as a new type of energy-saving and environmentally friendly building system, the steel structure building has been hailed as the "green building" of the 21st century. Tianjin Yuantai Derun Steel Pipe Manufacturing Group can also produce API 5L lsaw pipes, and has obtained relevant API 5L certification.In more and more high-rise and ultra-high-rise building design scheme to give priority to the use of steel or steel-concrete structural system, large-span buildings actively using space grid structure, three-dimensional truss structure, cable membrane structure and pre-stressed structural system, these are steel pipe in the construction of more application scenarios, and large-diameter, ultra-thick-walled steel pipe demand has also increased significantly.

The JCOEΦ1420 unit of Tianjin Yuantai Derun Steel Pipe Manufacturing Group can produce LSAW carbon steel pipe specifications ranging from Φ355.6mm to Φ1420mm in diameter and up to 50mm in wall thickness, which will fill the gap in the Tianjin market for such products when it is put into operation and can significantly shorten the lead time for ordering oversized, ultra-thick-walled structural round and rectangular pipes. However, at present, Yuantai Derun Steel Pipe Manufacturing Group can also produce super large diameter lsaw steel pipe with a diameter of 2000 mm.The double-sided submerged arc welding large longitudinal welded pipe can be directly used for oil and gas transmission, lsaw welded steel pipe has been widely used in the national "West-East gas transmission" project, while as a structural steel pipe can be applied to the construction of ultra-high-rise steel structure, in addition to the use of "round to square" process can be processed into oversized diameter In addition, the "round to square" process can be processed into oversized, ultra-thick-walled rectangular steel pipes, which can be used in large amusement facilities and heavy machinery and equipment manufacturing.At the same time, Yuantai Derun is also a certified lsaw pipe manufacturer in China.
How long is the production cycle of LSAW steel pipes?
About 30 days.
LSAW steel pipe workshop VR
LSAW steel pipe delivery time
LSAW steel pipe delivery cycle

To South Africa: 45 days
To the Middle East: 30 days
To South America: 60 days
To North America: 30 days
To Russia: 7 days
To Europe: 45 days
To Korea: 5 days
To Japan: 5 days
To Vietnam: 15 days
To Thailand: 15 days
To India: 30 days
To Indonesia: 15 days
To Singapore: 15 days
27 products found
ViewListShowcase
Sign up to get latest update
subscription
Please send your message to us
Yuantai team has over 21 years of experience in steel pipe project applications, specializing in the production, manufacturing, and customization of square rectangular, and circular steel pipes. Warmly welcome project procurement managers, individual owners, designers, and overall sellers, etc. Write down your requirements and receive professional quotes and technical support.
*Email
Name
Tel
*Title
*Content
Upload
  • Only supports .rar/.zip/.jpg/.png/.gif/.doc/.xls/.pdf, maximum 20MB.
Address