ERW LSAW Pipe - High-Quality Steel Pipe Solutions for Construction

ERW LSAW Pipe

ERW and LSAW pipes are essential for large-scale infrastructure projects, offering exceptional strength and durability for applications ranging from oil and gas pipelines to construction and industrial use.

Introduction of ERW LSAW Pipe:

ERW LSAW Pipe, also known as “Resistance Welding LSAW Pipe”, is mainly divided into two forms:

ERW AC welded steel pipe and ERW DC welded steel pipe. According to the different welding frequency, ERW LSAW pipe can be further subdivided into low frequency welding, medium frequency welding, super medium frequency welding and high frequency welding. Among them, high-frequency welding is mainly used for the production of thin-walled steel pipes or ordinary wall thickness steel pipes.

High frequency welding is further divided into contact welding and induction welding.
High-frequency welded pipe is a kind of ERW welded pipe, which is produced by high-frequency welding process. This process has the advantages of high production efficiency, low cost and good welding quality. High-frequency welded pipe has short weld seam, high dimensional accuracy, uniform wall thickness and good surface quality, so it is widely used in oil and gas transportation, chemical industry, construction and other fields.

ERW LSAW Pipe Material and Process:

Material: carbon steel, low alloy steel (such as Q235, X42-X80, etc.), some products can cover stainless steel and alloy steel.

Welding technology: high frequency resistance welding (ERW), weld seam uniformity and high strength, some products through eddy current testing, hydraulic testing and other quality control.

Surface treatment: Bare tube, black paint coating, galvanized or anti-corrosion coating are available to meet different environmental requirements.

ERW LSAW Pipe Performance Advantages:

High compressive strength, suitable for high-pressure fluid transportation (such as natural gas pipeline).

Smooth inner wall, low fluid resistance, reduce transportation energy consumption.

Strong corrosion resistance, some products are galvanized or coated to extend the service life.

Application areas of ERW LSAW pipes:

Energy transportation: oil, natural gas, water and other liquid and gas pipelines.

Construction engineering: building structure support, bridge frame, underground cable protection.

Industrial equipment: fluid transmission system in chemical industry, electric power, machinery manufacturing.

Quality control and certification:

Testing items: hydraulic pressure test, eddy current flaw detection, infrared detection, etc.

Certification standards: ISO 9001, API, SGS testing (support third party inspection).

Name	ERW LSAW Pipe
Execution Standard	API 5L, GB/T 9711.1, ASTM A53/A106, DIN, JIS.
Outside Diameter (OD)	10.3mm-914.4mm.
Wall Thickness (WT)	0.33-59.54mm.
Length	1 Length: 1-12m.
Steel grade	Q195-Q345, X42-X80, API J55-P110, etc.
Connection	Flat, beveled, threaded.
Packing and Transportation	Bundled or wooden case packing, support sea transportation.

Standard

1. Chinese standards (GB/T 3091, GB/T 9711)

Nominal Diameter（DN）	Outside Diameter（mm）	Wall Thickness（mm）	Length（m）	Material	Standard
DN15	21.3	2.0 - 3.0	6 - 12	Q235、20#	GB/T 3091
DN20	26.9	2.0 - 3.5	6 - 12	Q235、20#	GB/T 3091
DN25	33.4	2.5 - 4.0	6 - 12	Q235、20#	GB/T 3091
DN32	40.0	2.5 - 4.5	6 - 12	Q235、20#	GB/T 3091
DN40	48.3	2.5 - 5.0	6 - 12	Q235、20#	GB/T 3091
DN50	60.3	2.8 - 6.0	6 - 12	Q235、20#	GB/T 3091
DN65	76.1	3.0 - 7.0	6 - 12	Q235、20#	GB/T 3091
DN80	88.9	3.5 - 8.0	6 - 12	Q235、20#	GB/T 3091
DN100	114.3	4.0 - 10.0	6 - 12	Q235、20#	GB/T 3091
DN125	140.0	4.5 - 12.0	6 - 12	Q235、20#	GB/T 3091
DN150	165.1	5.0 - 14.0	6 - 12	Q235、20#	GB/T 3091
DN200	219.1	6.0 - 16.0	6 - 12	Q235、20#	GB/T 3091
DN250	273.0	7.0 - 20.0	6 - 12	Q235、20#	GB/T 3091
DN300	323.9	8.0 - 22.0	6 - 12	Q235、20#	GB/T 3091
DN350	377.0	9.0 - 25.0	6 - 12	Q235、20#	GB/T 3091
DN400	426.0	10.0 - 28.0	6 - 12	Q235、20#	GB/T 3091
DN450	480.0	11.0 - 30.0	6 - 12	Q235、20#	GB/T 3091
DN500	530.0	12.0 - 32.0	6 - 12	Q235、20#	GB/T 3091
DN600	610.0	14.0 - 36.0	6 - 12	Q235、20#	GB/T 3091
DN700	720.0	16.0 - 40.0	6 - 12	Q235、20#	GB/T 3091
DN800	820.0	18.0 - 45.0	6 - 12	Q235、20#	GB/T 3091
DN900	920.0	20.0 - 50.0	6 - 12	Q235、20#	GB/T 3091
DN1000	1020.0	22.0 - 55.0	6 - 12	Q235、20#	GB/T 3091
DN1200	1220.0	25.0 - 60.0	6 - 12	Q235、20#	GB/T 3091

2. American Standard (API 5L)

Nominal Diameter（DN）	Outside Diameter（mm）	Wall Thickness（mm）	Length（m）	Material	Standard
DN15	21.3	2.77	6 - 12	API Grade B	API 5L
DN20	26.9	3.38	6 - 12	API Grade B	API 5L
DN25	33.4	3.91	6 - 12	API Grade B	API 5L
DN32	40.0	4.53	6 - 12	API Grade B	API 5L
DN40	48.3	5.16	6 - 12	API Grade B	API 5L
DN50	60.3	6.02	6 - 12	API Grade B	API 5L
DN65	76.1	7.11	6 - 12	API Grade B	API 5L
DN80	88.9	8.20	6 - 12	API Grade B	API 5L
DN100	114.3	9.53	6 - 12	API Grade B	API 5L
DN125	140.0	11.10	6 - 12	API Grade B	API 5L^]
DN150	165.1	12.70	6 - 12	API Grade B	API 5L
DN200	219.1	14.20	6 - 12	API Grade B	API 5L
DN250	273.0	15.90	6 - 12	API Grade B	API 5L
DN300	323.9	17.50	6 - 12	API Grade B	API 5L
DN350	377.0	19.05	6 - 12	API Grade B	API 5L
DN400	426.0	20.60	6 - 12	API Grade B	API 5L
DN450	480.0	22.20	6 - 12	API Grade B	API 5L
DN500	530.0	23.80	6 - 12	API Grade B	API 5L
DN600	610.0	25.40	6 - 12	API Grade B	API 5L
DN700	720.0	27.00	6 - 12	API Grade B	API 5L
DN800	820.0	28.60	6 - 12	API Grade B	API 5L
DN900	920.0	30.20	6 - 12	API Grade B	API 5L
DN1000	1020.0	31.80	6 - 12	API Grade B	API 5L
DN1200	1220.0	33.40	6 - 12	API Grade B	API 5L

3、European Standard (EN 10217)

Nominal Diameter（DN）	Outside Diameter（mm）	Wall Thickness（mm）	Length（m）	Material	Standard
DN15	21.3	2.0 - 3.0	6 - 12	ST37、P235GH	EN 10217
DN20	26.9	2.5 - 3.5	6 - 12	ST37、P235GH	EN 10217
DN25	33.4	3.0 - 4.0	6 - 12	ST37、P235GH	EN 10217
DN32	40.0	3.5 - 4.5	6 - 12	ST37、P235GH	EN 10217
DN40	48.3	4.0 - 5.0	6 - 12	ST37、P235GH	EN 10217
DN50	60.3	4.5 - 6.0	6 - 12	ST37、P235GH	EN 10217
DN65	76.1	5.0 - 7.0	6 - 12	ST37、P235GH	EN 10217
DN80	88.9	5.5 - 8.0	6 - 12	ST37、P235GH	EN 10217
DN100	114.3	6.0 - 10.0	6 - 12	ST37、P235GH	EN 10217
DN125	140.0	6.5 - 12.0	6 - 12	ST37、P235GH	EN 10217
DN150	165.1	7.0 - 14.0	6 - 12	ST37、P235GH	EN 10217
DN200	219.1	8.0 - 16.0	6 - 12	ST37、P235GH	EN 10217
DN250	273.0	9.0 - 20.0	6 - 12	ST37、P235GH	EN 10217
DN300	323.9	10.0 - 22.0	6 - 12	ST37、P235GH	EN 10217
DN350	377.0	11.0 - 25.0	6 - 12	ST37、P235GH	EN 10217
DN400	426.0	12.0 - 28.0	6 - 12	ST37、P235GH	EN 10217
DN450	480.0	13.0 - 30.0	6 - 12	ST37、P235GH	EN 10217
DN500	530.0	14.0 - 32.0	6 - 12	ST37、P235GH	EN 10217
DN600	610.0	16.0 - 36.0	6 - 12	ST37、P235GH	EN 10217
DN700	720.0	18.0 - 40.0	6 - 12	ST37、P235GH	EN 10217
DN800	820.0	20.0 - 45.0	6 - 12	ST37、P235GH	EN 10217
DN900	920.0	22.0 - 50.0	6 - 12	ST37、P235GH	EN 10217
DN1000	1020.0	24.0 - 55.0	6 - 12	ST37、P235GH	EN 10217
DN1200	1220.0	26.0 - 60.0	6 - 12	ST37、P235GH	EN 10217

4. Japanese Standard (JIS G3444)

Nominal Diameter（DN）	Outside Diameter（mm）	Wall Thickness（mm）	Length（m）	Material	Standard
DN15	21.3	2.0 - 3.0	6 - 12	STK400	JIS G3444
DN20	26.9	2.5 - 3.5	6 - 12	STK400	JIS G3444
DN25	33.4	3.0 - 4.0	6 - 12	STK400	JIS G3444
DN32	40.0	3.5 - 4.5	6 - 12	STK400	JIS G3444
DN40	48.3	4.0 - 5.0	6 - 12	STK400	JIS G3444
DN50	60.3	4.5 - 6.0	6 - 12	STK400	JIS G3444
DN65	76.1	5.0 - 7.0	6 - 12	STK400	JIS G3444
DN80	88.9	5.5 - 8.0	6 - 12	STK400	JIS G3444
DN100	114.3	6.0 - 10.0	6 - 12	STK400	JIS G3444
DN125	140.0	6.5 - 12.0	6 - 12	STK400	JIS G3444
DN150	165.1	7.0 - 14.0	6 - 12	STK400	JIS G3444
DN200	219.1	8.0 - 16.0	6 - 12	STK400	JIS G3444
DN250	273.0	9.0 - 20.0	6 - 12	STK400	JIS G3444
DN300	323.9	10.0 - 22.0	6 - 12	STK400	JIS G3444
DN350	377.0	11.0 - 25.0	6 - 12	STK400	JIS G3444
DN400	426.0	12.0 - 28.0	6 - 12	STK400	JIS G3444
DN450	480.0	13.0 - 30.0	6 - 12	STK400	JIS G3444
DN500	530.0	14.0 - 32.0	6 - 12	STK400	JIS G3444
DN600	610.0	16.0 - 36.0	6 - 12	STK400	JIS G3444
DN700	720.0	18.0 - 40.0	6 - 12	STK400	JIS G3444
DN800	820.0	20.0 - 45.0	6 - 12	STK400	JIS G3444
DN900	920.0	22.0 - 50.0	6 - 12	STK400	JIS G3444
DN1000	1020.0	24.0 - 55.0	6 - 12	STK400	JIS G3444
DN1200	1220.0	26.0 - 60.0	6 - 12	STK400	JIS G3444

Key Parameter Description

OD Range:
From DN15 (21.3mm) to DN1200 (1220.0mm), covering a wide range of applications from small to large diameters.

Wall thickness range:
from 2.0mm to 60.0mm, the specific wall thickness is adjusted according to the nominal diameter and application scenarios.

Length:
The standard length is 6m or 12m, which can be customized according to customers' requirements.

Material:
China Standard: Q235, 20#, Q345, X42-X80.
U.S.A. Standard: API Grade B, X42-X80.
Europe Standard: ST37, P235GH, P265GH.
Japan Standard: STK400.

Execution Standard:
China: GB/T 3091, GB/T 9711.
U.S.A.: API 5L.
Europe: EN 10217.
Japan: JIS G3444.

Specification

Specification	Wall Thickness	Weight in meters	National standard water pressure values	Ministry standard water pressure values
219	6	32.02	9.7	7.7
219	7	37.1	11.3	9
219	8	42.13	12.9	10.3
273	6	40.01	7.7	6.2
273	7	46.42	9	7.2
273	8	52.78	10.3	8.3
325	6	47.7	6.5	5.2
325	7	55.4	7.6	6.1
325	8	63.04	8.7	6.9
377	6	55.4	5.7	4.5
377	7	64.37	6.7	5.2
377	8	73.3	7.6	6
377	9	82.18	8.6	6.8
377	10	91.01	-	7.5
426	6	62.25	5.1	4
426	7	72.83	5.9	4.6
426	8	82.97	6.8	5.3
426	9	93.05	7.6	6
426	10	103.09	8.5	6.7
478	6	70.34	4.5	3.5
478	7	81.81	5.3	4.1
478	8	93.23	6	4.7
478	9	104.6	6.8	5.3
478	10	115.92	7.5	5.9
529	6	77.89	4.1	3.2
529	7	90.61	4.8	3.7
529	8	103.29	5.4	4.3
529	9	115.92	6.1	4.8
529	10	128.49	6.8	5.3
630	6	92.83	3.4	2.6
630	7	108.05	4	3.1
630	8	123.22	4.6	3.6
630	9	138.33	5.1	4
630	10	153.4	5.7	4.5
720	6	106.15	3	2.3
720	7	123.59	3.5	2.7
720	8	140.97	4	3.1
720	9	158.31	4.5	3.5
720	10	175.6	5	3.9
720	12	210.02	6	4.7
820	7	140.85	3.1	2.4
820	8	160.7	3.5	2.7
820	9	180.5	4	3.1
820	10	200.26	4.4	3.4
820	11	219.96	4.8	3.8
820	12	239.62	5.3	4.1
920	8	180.43	3.1	2.5
920	9	202.7	3.5	2.8
920	10	224.92	3.9	3.1
920	11	247.22	4.3	3.4
920	12	269.21	4.7	3.7
1020	8	200.16	2.8	2.2
1020	9	224.89	3.2	2.5
1020	10	249.58	3.5	2.8
1020	11	274.22	3.9	3
1020	12	298.81	4.2	3.3
1220	8	239.62	-	1.8
1220	10	298.9	3	2.3
1220	11	328.47	3.2	2.5
1220	12	357.99	3.5	2.8
1220	13	387.46	3.8	3
1420	10	348.23	2.8	2
1420	14	417.18	3.2	2.4
1620	12	476.37	2.9	2.1
1620	14	554.99	3.2	2.4
1820	14	627.04	3.3	2.2
2020	14	693.09	-	2
2220	14	762.15	-	1.8
2420	8	239.62	-	1.8
2420	10	298.9	3	2.3
2420	11	328.47	3.2	2.5
2420	12	357.99	3.5	2.8
2420	13	387.46	3.8	3
2620	10	348.23	2.8	2
2620	14	417.18	3.2	2.4
2820	12	476.37	2.9	2.1
2820	14	554.99	3.2	2.4
3020	14	627.04	3.3	2.2
3220	14	693.09	-	2
3420	14	762.15	-	1.8

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