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ERW Steel Pipe
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ERW Steel Pipe

Resistance welding is a process that applies pressure through electrodes after the welding parts are assembled, and uses resistance heat generated by current passing through the contact surface of the joint and adjacent areas to weld.
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Product Introduction

Resistance welded pipes are pressure welded pipes that heat the edge of the weld to the welding temperature and pressure weld the synthetic pipe. Divided into low frequency and high frequency.

OD

21.3mm -660mm

W.T

1mm-20mm

LENGTH

0.5mtr-22mtr

Surface

Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer's requirement

Standard

API5L, ASTM A53 GR.B, ASTM A178, ASTM A500/501, ASTM A691, ASTM A252, ASTM A672, EN 10217; API SPEC 5L ISO 3183 GB/T 9711.1 GB/T 9711.2 GB/T 9711.3

Ends

Square Ends (straight cut, saw cut) Beveled Ends

ERW Pipe Size Sheet

DN

out diameter

thickness chart

A series

B series

Sch
5s

Sch
10s

Sch
20s

LG

Sch
20

Sch
30

STD

Sch
40

Sch
60

XS

Sch
80

Sch
100

Sch
120

Sch
140

Sch
180

32
40
50

42.4
48.3
60.3

38
45
57

1.6
1.6
1.6

2.8
2.8
2.8

3.2
3.2
3.6

-
-
-

-
-
3.2

-
-
-

-
-
-

3.6
3.6
4.0

-
-
-

-
-
-

5.0
5.0
5.6

-
-
-

-
-
-

-
-
-

6.3
7.1
8.8

65
80
90

76.1
88.9
101.6

76
89
-

2.0
2.0
2.0

3.0
3.0
3.0

3.6
4.0
4.0

-
-
-

4.5
4.5
4.5

-
-
-

-
-
-

5.0
5.6
5.6

-
-
-

-
-
-

7.1
8.0
8.0

-
-
-

-
-
-

-
-
-

10.0
11.0
12.5

100
125
150

114.3
139.7
168.3

108
133
159

2.0
2.9
2.9

3.0
3.4
3.4

4.0
5.0
5.0

-
-
-

5.0
5.0
5.6

-
-
-

-
-
-

5.9
6.3
7.1

-
-
-

-
-
-

8.8
10.0
11.0

-
-
-

11.0
12.5
14.2

-
-
-

14.2
16.0
17.5

200
250
300

219.1
273.0
323.9

219
273
325

2.9
3.6
4.0

4.0
4.0
4.5

6.3
6.3
6.3

-
-
-

6.3
6.3
6.3

7.1
8.0
8.8

-
-
-

8.0
8.8
10.0

10.0
12.5
14.2

-
-
-

12.5
16.0
17.5

16.0
17.5
22.2

17.5
22.2
25.0

20.0
25.0
28.0

22.2
28.0
32.0

350
400
450
500
550
600

355.6
406.4
457.0
508.0
559
610

377
426
478
529
-
630

4.0
4.0
4.0
5.0
5.0
5.6

5.0
5.0
5.0
5.6
5.6
6.3

-
-
-

8.0
8.0
8.0
8.0
8.0
8.0

8.0
8.0
8.0
10.0
-
-

10.0
10.0
11.0
12.5
-
-

10.0
10.0
10.0
10.0
10.0
10.0

11.0
12.5
14.2
16.0
-
17.5

16.0
17.5
20.0
20.0
-
-

13.0
13.0
13.0
13.0
13.0
13.0

20.0
22.2
25.0
28.0
30.0
32.0

25.8
28.5
30.0
32.0
-
-

28.0
30.0
36.0
40.0
-
-

32.0
36.0
40.0
45.0
-
-

36.0
40.0
45.0
50.0
-
-

Resistance welding mainly includes the following steps:

1. Pre-treatment: Clean the metal surface to ensure good contact.

2. Installation: Install the metal parts to be welded correctly on the welding machine so that current can flow through the welding area.

3. Current conduction: The current is introduced into the metal parts through the current conduction device.

4. Heating: The resistance generated by current conduction generates heat, heating the metal parts to a certain temperature.

5. Connection: After heating to a certain temperature, the metal parts are pressed together to melt and form a connection.

ERW Welded Pipe 

erw welded pipe

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