ERW Steel Pipe Supplier

Product Details:

ERW steel pipe, also known as straight seam high frequency welded pipe, steel pipes of 8 inches (inclusive) and above are large-diameter steel pipes, usually in bulk, and steel pipes below 8 inches are small pipes, typically need to be packaged.

A welded steel pipe refers to the connection of two ends or parts of a steel pipe through a welding process. This metal processing and connection method is commonly used in many fields such as construction, manufacturing, and pipeline systems.

1. Arc welding: This is a common welding method that uses electric current to generate an arc to heat the welding rod or wire to a high enough temperature so that the workpieces can be connected to each other.

2. Gas-shielded welding (TIG/MIG welding): TIG (argon arc welding) and MIG (metal inert gas welding) are commonly used gas-shielded welding methods. They use inert gases (such as argon) to protect the welding area from oxygen and other impurities in the air.

3. Resistance welding: The workpieces are heated to a sufficient temperature by resistance, and then pressure is applied to connect them together. This method is often used to connect small-diameter pipes.

Classification of welded pipes:

1. Classification by welding method:

Straight seam welded pipe (ERW pipe): manufactured using resistance welding or high-frequency induction welding methods, usually used for general engineering and structural purposes.

Spiral seam welded pipe: manufactured using a spiral submerged arc welding process, suitable for conveying fluids, structural purposes, and oil and gas pipelines.

2. Classification of welding materials:

Black welded pipe: steel pipe whose surface is not galvanized or otherwise treated with anti-corrosion, mainly used for general structural and engineering applications.

Galvanized welded pipe: the surface is galvanized to improve corrosion resistance, suitable for environments requiring higher corrosion resistance, such as water pipes.

3. Classification of application fields:

Structural welded pipe: used in construction and structural engineering, bearing static and dynamic loads.

Fluid conveying welded pipe: used to convey water, gas, oil, and other fluids.

Oil and gas pipeline welded pipe: pipelines dedicated to conveying oil and gas, usually requiring higher strength and corrosion resistance.

Application fields:

1. Buildings and infrastructure: used for support of building structures, bridges, stairs, railings, etc. Welded steel pipes are often used in construction to build frames and support systems.

2. Pipelines and transportation systems: As the main component of pipelines that transport liquids (such as water, oil, natural gas) or gases (such as gas pipelines). Welded steel pipes are widely used in water supply systems, natural gas pipelines, and oil and gas transportation.

3. Industry and manufacturing: Used for manufacturing equipment, mechanical structures, and processing industrial purposes. Welded steel pipes can be used to build industrial equipment, mechanical parts, and manufacturing lines.

4. Oil and gas industry: As a pipeline for oil and natural gas. These pipelines require high strength and corrosion resistance, so welded steel pipes are very important in fields such as oil extraction, transportation, and refining.

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