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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/米(KG/M)	磅/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

train station-LSAW steel pipe application

city building-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

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