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ERW Steel Pipe & ERW Casing

ERW (Electric Resistance Welded ) Steel Pipe, HFW (High-Frequency Welding) Steel Pipe, ERW Casing

Standard: ASTM 5L, ASTM A53 B, ASTM A178, ASTM A500/501, ASTM A691, ASTM A252, ASTM A672, EN 10217

ERW steel pipes and tubes are used in various engineering purposes, fencing, scaffolding, line pipes etc.

ERW Pipe

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%
323.9~457
+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 and Mechanical Properties
Standard Class Grade
Chemical Analysis(%)
Mechanical Properties(min)(Mpa)
C Mn P S Tensile Strength
Yield Strength
API 5L PSL1 B
0.26
1.20
0.030
0.030
414
241
X42
0.26
1.30
0.030
0.030
414
290
X46
0.26
1.40
0.030
0.030
434
317
X52
0.26
1.40
0.030
0.030
455
359
X56
0.26
1.40
0.030
0.030
490
386
X60
0.26
1.40
0.030
0.030
517
414
X65
0.26
1.45
0.030
0.030
531
448
X70
0.26
1.65
0.030
0.030
565
483
PSL2 B
0.22
1.20
0.025
0.015
414
241
X42
0.22
1.30
0.025
0.015
414
290
X46
0.22
1.40
0.025
0.015
434
317
X52
0.22
1.40
0.025
0.015
455
359
X56
0.22
1.40
0.025
0.015
490
386
X60
0.22
1.40
0.025
0.015
517
414
X65
0.22
1.45
0.025
0.015
531
448
X70
0.22
1.65
0.025
0.015
565
483
X80
0.22
1.85
0.025
0.015
621 552

High-frequency straight seam electric-resistance welded steel 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.

High-frequency resistance welding steel pipe, welding pipe and ordinary welding process is not the same, the weld is made of the base metal melt from the body, the mechanical strength is better than the general pipe. Smooth appearance, high precision, low cost weld high and small, favorable 3PE anti-corrosion coating. 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.


ERW Casing

Standard: API SPEC 5CT

Application: Casing serves as wall of well

Specification

OD

WT

End Type

inch

mm

inch

mm

Grade

J55

M65

N80/L80-1

P110

K55

8 5/8

219.08

0.304

7.72

-

PS

-

-

0.352

8.94

PSLB

PSLB

-

-

0.400

10.16

PSLB

PSLB

PLB

PLB

0.450

11.43

-

PLB

PLB

PLB

0.500

12.70

-

-

PLB

PLB

9 5/8

244.48

0.352

8.94

PSLB

PSLB

-

-

0.395

10.03

PSLB

PSLB

PLB

PLB

0.435

11.05

-

PLB

PLB

PLB

0.472

11.99

-

PLB

PLB

PLB

0.545

13.84

-

-

PLB

PLB

10 3/4

273.05

0.350

8.89

PSB

PSB

-

-

0.400

10.16

PSB

PSB

-

-

0.450

11.43

PSB

PSB

PSB

PSB

0.500

12.57

-

PSB

PSB

PSB

0.545

13.84

-

-

-

PSB

13 3/8

339.72

0.380

9.65

PSB

PSB

-

-

0.430

10.92

PSB

PSB

-

-

0.480

12.19

PSB

PSB

PSB

PSB

0.514

13.06

-

-

PSB

PSB

16

406.40

0.438

11.13

PSB

-

-

-

0.495

12.57

PSB

-

-

-

0.656

16.66

P

-

-

-

18 5/8

473.08

0.435

11.05

PSB

-

-

-

20

508

0.438

11.13

PSLB

-

-

-

0.500

12.70

PSLB

-

-

-

0.635

16.13

PSLB

--

-

-


Dimensional Tolerance

Standard

Tolerance of O.D.

Tolerance of W.T.

Straightness of Pipe Body

Straightness of Pipe End

Tolerance for Weight

API 5CT

+1%, -0.5%

-12.5%

≤0.2%L

≤3.18mm

+6.5%, -3.5%


Mechanical Properties

Standard

Grade

Yield Strength(Mpa)

Tensile Strength(Mpa)

Hardness(HRC)

Impact Energy(J)(min)

Impact Temperature(℃)

API 5CT

J55

379-552

≥517

-

T-10-20(SR16)

21

K55

379-552

≥655

-

L-10-27(SR16)

M65

448-586

≥586

≤22

T-10-20, L-10-41

C19-20, C76-77(SR16)

0

L80

552-655

≥655

≤23

N80

552-758

≥689

-

P110

758-965

≥862

-


Chemical Composition(%)

Standard

Grade

C

Mn

P

S

Ni

Cu

Si

API 5CT

J55

-

-

≥0.030

≥0.030

-

-

-

K55

-

-

≥0.030

≥0.030

-

-

-

M65

-

-

≥0.030

≥0.030

-

-

-

L80

≥0.43

≥1.90

≥0.030

≥0.030

≥0.25

≥0.35

≥0.45

N80

-

-

≥0.030

≥0.030

-

-

-

P110

-

-

≥0.030

≥0.030

-

-

-

Delivery time is short and catch up our work.

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The order is with happy,looking forward to next.

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There is a little crack on inside.

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Quality is better than other suppliers.

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