ERW Steel Pipe Round Pipes

Product details:

Place of Origin Tianjin, China
Alloy Or Not Non-Alloy
Standard JIS
Technique ERW
Grade ASTM A106/A53 Gr.B
Delivery Time 7-30days
Application Fluid Pipe, Gas Pipe, OIL PIPE, Structure Pipe
Special Pipe Thick Wall Pipe
Thickness 0.6 - 6 mm
Length 6m, 6.4M
Certificate JIS, ISO9001, etc.
Processing Service Welding, Punching, Cutting, Bending, Decoiling
Product name ERW Carbon Welded Steel Tube Gas Black Welded Steel Pipe
Material ASTM A106/A53 Gr.B
Application Boiler, Pressure vessel, Structure steel, decoration, machine, etc.
Certificate ISO9001:2008
Delivery Term FOB, CIF, CFR, EXW
Shipping way Sea transportation
Packing waterproof package or as required
Technique Cold rolled

ERW Pipes: Electric Resistance Welding for Conveying Fluids

ERW pipes, abbreviated from Electric Resistance Welding, are used for transporting various fluids, such as oil and gas, meeting high and low-pressure requirements. They play a crucial role in the field of pipes for transportation worldwide.

Welded pipes are indicated as follows:

SC for general submerged arc welded steel pipes used in electrical engineering and thicker pipes used for water and gas.
T for thinner pipes used as conduits for wiring.
ERW pipes, produced through high-frequency resistance welding, have welding seams with mechanical strength comparable to conventional welded pipes. The ERW process is known for its high efficiency, low cost, material savings, and ease of automation. It is widely used in industries such as aerospace, energy, electricity, automotive, and light manufacturing.

The key quality difference between ERW pipes and seam-welded pipes lies in the welding seam. Modern ERW pipe production processes and equipment have made significant advancements. Efforts have been made to address issues such as geometric seam imperfections, physical seam imperfections, and removal of burrs inside and outside the ERW pipes.

Geometric Seam Imperfections: Efforts have been made to eliminate geometric imperfections in the weld seam by improving and perfecting the equipment used in the ERW pipe manufacturing process.

Physical Seam Imperfections: Modern ERW pipe production utilizes advanced technology to address issues related to the internal and external burrs in the weld seam. The structure of tools and the cutting process have been improved to achieve better results in removing burrs.

Control of Inner Burrs: The system for removing inner burrs has been enhanced, resulting in better control and removal of burrs, typically within the range of -0.2mm to 0.5mm.

Physical Seam Treatment: Physical seam treatment involves addressing differences in the microstructure between the weld seam and the base material, which can affect the mechanical properties of the weld seam area. Measures are taken to homogenize and refine the weld seam region, achieving uniformity and improved characteristics.

Heat Treatment: Advanced ERW welding units now commonly employ heat treatment processes to reduce welding stresses, soften and refine the microstructure, and enhance the overall mechanical properties of the welded seam area.

Seam Factor: Quality ERW pipes boast a seam factor of 1, meaning the weld seam's microstructure matches that of the base material, ensuring a seamless integration of properties.

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