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Electric Resistance Welded Pipe

Chemical Composition Electric resistance welding ( ERW ) refers to a group of welding processes such as spot and seam welding that produce coalescence of faying surfaceswhere heat to form the weld is generated by the electrical resistance of material combined with the time and the force used to...
Product Details:
Longitudinal electric resistance welded steel Pipe/tubeS355/ST52 LSAW/DSAW Carbon Steel Pipe

O.D

O.D tolerance

W.T

Thickness Tolerance

21.34—3200mm

±0.03

0.6—30mm

±0.02

Length

2—12m, according to the customers’requirements

International Standard

ISO9001-2000

Standard

ASTM A53 / BS 1387-1985, API5L / ASTMA106, etc

Material

Gr.B, X42-X70, St35-St52,etc

Product Category

Matallurgy, Mineral & Energy

Technique

Welded

Packing

In bundles or according to customers’request

Usage

1. For low pressure liquid delivery such as water, gas and oil
2. For construction, e.g building greenhouse

Main market

Middle east, Africa, North and South America, East and West Europe, 
South and southeast Asia, Australis

HS code

73063090

Productivity

12000ton/month

Processing technology available

Threading, coupling and with plastic caps protected

Remarks

1)Payment term: T/T
2)Trade Term: FOB/CFR/CIF
3)Minimum quantity of order: 10 MT
4)Delivery period: 10 to 30 Days


Chemical  Composition 

Grade Level

Steel Grade

C≤

Mn≤

P≤

S≤

PSL1

A25

0.21

0.60

0.030

0.030

A

0.22

0.90

0.030

0.030

B

0.28

1.20

0.030

0.030

X42

0.28

1.30

0.030

0.030

X46,X52,X56

0.28

1.40

0.030

0.030

X60,X65,X70

0.28

1.40

0.030

0.030

PSL2

B

0.24

1.20

0.025

0.015

X42

0.24

1.30

0.025

0.015

X46,X52,X56

0.24

1.40

0.025

0.015

X60,X65,X70,X80

0.24

1.40

0.025

0.015


Electric  resistance welding (ERW) refers to a group of welding processes  such as spot and seam welding that produce coalescence of faying surfaceswhere heat to form the weld is generated by the electrical resistance of material combined with the time and the force used to hold the materials together during welding. Some factors influencing heat or welding temperatures are the proportions of the workpieces, the metal coating or the lack of coating, the electrode materials, electrode geometry, electrode pressing force, electrical current and length of welding time. Small pools of molten metal are formed at the point of most electrical resistance (the connecting or "faying" surfaces) as an electrical current (100–100,000 A) is passed through the metal. In general, resistance welding methods are efficient and cause little pollution, but their applications are limited to relatively thin materials and the equipment cost can be high (although in production situations  the cost per weld may be low).


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