ERW Steel pipe

1. ERW Steel Pipe Manufacturer & Supplier

ERW steel pipes are widely used in construction, oil & gas transmission, water systems, and structural applications. We supply ERW pipes in ASTM, API, and EN standards with stable quality and reliable delivery.

2. ERW Steel Pipe Specifications

The following table outlines the standard size range and technical specifications of our ERW steel pipes. Custom dimensions and coating options are available based on project requirements.

Parameter	Specification
OD	21.3 mm – 660 mm
Wall Thickness (W.T)	1 mm – 20 mm
Length	0.5 mtr – 22 mtr
Surface	Fusion Bond Epoxy (FBE), Coal Tar Epoxy, 3PE, Varnish Coating, Bitumen Coating, Black Oil Coating (as per customer requirement)
Standards	API 5L, ASTM A53 Gr.B, ASTM A178, ASTM A500/501, ASTM A691, ASTM A252, ASTM A672, EN 10217, ISO 3183, GB/T 9711.1 / 9711.2 / 9711.3
Ends	Square Ends (straight cut, saw cut), Beveled Ends

 ERW pipe specification 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 - -

3. Advantages of ERW Steel Pipe

ERW steel pipes offer a balanced combination of performance, cost efficiency, and production consistency, making them widely used in various industries.

3.1 Cost-effective

Compared with seamless pipes, ERW pipes are more economical due to a more efficient manufacturing process and lower material waste. 

3.2 Good dimensional accuracy

ERW pipes are produced with tight tolerances, ensuring consistent outer diameter and wall thickness. 

3.3 Suitable for high-volume projects

The continuous production process allows for large-scale manufacturing with stable quality. 

4. Applications of ERW Steel Pipe

Oil and gas transportation – suitable for low to medium pressure pipeline systems 
Water pipelines – used in municipal and industrial fluid transport 
Structural applications – applied in construction, scaffolding, and mechanical structures

5. Quality Assurance and Testing

To ensure reliable performance and compliance with international standards, our ERW steel pipes undergo strict quality control throughout production.

- Raw Material Verification – Chemical composition and mechanical properties are checked before production. 
- Weld Seam Monitoring – Welding temperature and pressure are continuously controlled for stable seam integrity. 
- Dimensional Inspection – OD, wall thickness, and ovality are measured to meet tolerance requirements. 
- NDT Testing – UT or ECT is used to detect weld and surface defects. 
- Hydrostatic Test – Pressure testing is available when required. 
- Full Traceability – Each batch is tracked from coil to finished pipe.

6. ERW Steel Pipe Manufacturing Process

ERW pipes are produced through a continuous forming and high-frequency welding process, ensuring stable dimensions and efficient mass production.

Main Production Steps:
1. Slitting and Feeding – Steel coils are slit to required width and fed into the line. 
2. Cold Forming – Strip steel is gradually formed into a round tube. 
3. HFI Welding – Edges are heated and pressure welded into a solid seam. 
4. Scarfing – Internal and external weld beads are removed. 
5. Sizing and Straightening – Final OD is calibrated and pipe is straightened. 
6. Cutting and Packing – Pipes are cut to length, inspected, and packed. 

For detailed production capability, contact our team.

7. FAQs

Q1. What is ERW pipe used for?

ERW pipes are widely used in oil and gas transport, water pipelines, structural construction, fencing, scaffolding, and industrial applications.

Q2. Is ERW pipe strong?

Yes. ERW pipes offer reliable mechanical strength and are suitable for most standard pressure and structural applications when manufactured to standards such as API 5L or ASTM A53.

Q3. Is ERW pipe cheaper than seamless pipe?

Yes. ERW pipes are generally more cost-effective because of higher production efficiency and lower manufacturing costs.

Q4. What standards are available for ERW steel pipe?

Common standards include API 5L, ASTM A53, ASTM A500, EN 10217, ISO 3183, and GB/T 9711.

Q5. Can ERW pipes be supplied with coating?

Yes. Available options may include 3PE coating, FBE coating, black painting, bitumen coating, and galvanized finish based on project requirements.

Q6. Can you provide custom sizes and lengths?

Yes. Custom diameters, wall thicknesses, lengths, and end finishes can be produced depending on order quantity and technical requirements.

8. ERW Pipe Buying Guide & Technical Resources

Explore practical guides, technical comparisons, and selection tips to help you choose the right ERW steel pipe for your project.

Compare and Selection

ERW Pipe vs Seamless Pipe: Key Differences

ERW vs Seamless Pipe Cost Comparison

What Is ERW Pipe? Complete Guide

ERW Pipe Specifications and Models

Quality and Inspection

ERW Steel Pipe Quality Assessment Process

Quality Control and Testing of Welded Pipes

Ultrasonic Testing of ERW Pipes

Manufacturing and Production

Main Equipment in the ERW Pipe Production Line

ERW Pipe Production Line Overview

Applications

Application of ERW Pipes in Gas Transportation

ERW Pipe Uses in Different Industries