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  • ERW Steel pipe
  • ERW Steel pipe
  • ERW Steel pipe
  • ERW Steel pipe
  • ERW Steel pipe

ERW Steel pipe

Category : Welded Steel Pipe
Views : 437

Electric Resistance Welding Pipe(ERW steel pipe) is hot-rolled coil after forming machine, the use of high-frequency current skin effect and proximity effects, the tube edge heating and melting, squeeze roller under pressure welding to achieve production.


There are significant differences in the welding methods between high frequency welded pipe and submerged arc welded pipe. As the welding is done instantly at high speed, the difficulty of ensuring the quality of welding is much higher than that of submerged arc welding. 


Uses:For conveying gas, water and oil either in the oil or natural gas industries.
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Product Description

Electric Resistance Welding Pipe(ERW steel pipe) is hot-rolled coil after forming machine, the use of high-frequency current skin effect and proximity effects, the tube edge heating and melting, squeeze roller under pressure welding to achieve production.

There are significant differences in the welding methods between high frequency welded pipe and submerged arc welded pipe. As the welding is done instantly at high speed, the difficulty of ensuring the quality of welding is much higher than that of submerged arc welding.

Uses:For conveying gas, water and oil either in the oil or natural gas industries.


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


Tolerance of Outside Diameter

Standard

Out Diameter

Tolerance of Pipe End

Tolerance of Pipe Body

API 5L

219.1~273.1

+1.6mm, -0.4mm

±0.75%

274.0~320

+2.4mm, -0.8mm

±0.75%

323.8~457

+2.4mm, -0.8mm

±0.75%

508

+2.4mm, -0.8mm

±0.75%

559~610

+2.4mm, -0.8mm

±0.75%


Tolerance of Wall Thickness

Standard

Grade

Out Diameter

Wall Thickness

API 5L

A

219.1~457

+15%, -12.5%

B

508~610

+17.5%, -12.5%

X42-X80

508~610

+19.5%, -8%


Chemical Analysis (%)

Standard

Class

Grade

C

Si

Mn

P

S

V

Nb

Ti

max

max

max

max

max

max

max

max

API SPEC 5L

PLS1

L245 B

0.26

-

1.2

-

0.03

0.03

-

-

L290 X42

0.26

-

1.3

-

0.03

0.03

-

-

L320 X46

0.26

-

1.4

-

0.03

0.03

-

-

L360 X52

0.26

-

1.4

-

0.03

0.03

-

-

L390 X56

0.26

-

1.4

-

0.03

0.03

-

-

L415 X60

0.26

-

1.4

-

0.03

0.03

-

-

L450 X65

0.26

-

1.45

-

0.03

0.03

-

-

L485 X70

0.26

-

1.65

-

0.03

0.03

-

-

PLS2

 L245M BM

0.22

0.45

1.2

0.025

0.015

0.05

0.05

0.04

L290M X42M

0.22

0.45

1.3

0.025

0.015

0.05

0.05

0.04

L320M X46M

0.22

0.45

1.3

0.025

0.015

0.05

0.05

0.04

L360M X52M

0.22

0.45

1.4

0.025

0.015

-

-

-

L390M X56M

0.22

0.45

1.4

0.025

0.015

-

-

-

L415M X60M

0.12

0.45

1.6

0.025

0.015

-

-

-

L450M X65M

0.12

0.45

1.6

0.025

0.015

-

-

-

L485M X70M

0.12

0.45

1.7

0.025

0.015

-

-

-

L555M X80M

0.12

0.45

1.85

0.025

0.015

-

-

-


Mechanical Properties

Standard

Class

Grade


Yield strength not less than (MPa)

Tensile strength (MPa)

Elongation

(%)

Y.S/T.S

API SPEC 5L

PLS1

L245B

min

245

415

b

-

L290X42

min

290

415

b

-

L320X46

min

320

435

b

-

L360X52

min

360

460

b

-

L390X56

min

390

490

b

-

L415X60

min

415

520

b

-

L450X60

min

450

535

b

-

L485X70

min

485

570

b

-

PLS2

L245N BN

min

245

415

b

-

L245M BM

max

450

760

b

0.93

L290NX42N

min

290

415

b

-

L290MX42M

max

495

760

b

0.93

L320NX46N

min

320

435

b

-

L320MX46M

max

525

760

b

0.93

L360NX52N

min

360

460

b

-

L360MX52M

max

530

760

b

0.93

L390NX56N

min

390

490

b

-

L390MX56M

max

545

760

b

0.93

L415NX60N

min

415

520

b

-

L415MX60M

max

565

760

b

0.93

L450MX65M

min

450

535

b

-

max

600

760

b

0.93

L485MX70M

min

485

570

b

-

max

635

760

b

0.93

L555MX80M

min

555

625

b

-

max

705

825

b

0.93


Standard

Grade

Transverse minimum impact of Pipe body

Transverse minimum impact of weld (J)

 (J)

D=508

508mm

762mm

914mm

1219mm

D<1422mm

D=1422mm

API SPEC 5L

“=L415×60”

27(20)

27(20)

40(30)

40(30)

40(30)

27(20)

40(30)

>L415×60

27(20)

27(20)

40(30)

40(30)

54(40)

27(20)

40(30)

“=L415×65”

>L450×65

27(20)

27(20)

40(30)

40(30)

54(40)

27(20)

40(30)

“=L485×70”

>L485×70

40(30)

40(30)

40(30)

40(30)

54(40)

27(20)

40(30)

“=L555×80”

Note:(1)The values in the table be suitable for the full size standard sample.

    (2) The values inside bracket is the minimum single value, outside bracket is the average value.

    (3) Test Temperature: 0°C.


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