Understanding these names helps you choose the right product for your project. Do you need a pipe for high-pressure oil transmission? Or do you need a structural column for a new building? Each type has unique characteristics and strengths. We will guide you through the common terms. Then, we will show you why we are the leading supplier for all your steel pipe needs.

At the highest level, the steel pipe family divides into two main branches. This division depends on the presence of a weld seam.

Seamless Steel Pipe

1.This pipe has no welded joint.

2.Manufacturers create it by extruding a solid steel billet.

3.It is exceptionally strong and uniform.

4.This type is ideal for high-pressure and critical applications .

Welded Steel Pipe

(1)This pipe has a seam from the manufacturing process.

(2)It is made by forming a flat steel plate or coil.

(3)The edges are then welded together to form a tube.

(4)It is cost-effective and versatile for many uses .

Within the welded category, the names get more specific. These names often refer to the welding method used.

ERW Steel Pipe (Electric Resistance Welded)

This is a very common type of steel pipe. We manufacture it by rolling steel coils into a tubular shape. Then, we use high-frequency electrical current to weld the seam without filler metal . ERW steel pipes are known for their excellent dimensional accuracy and uniform thickness . They are a popular choice for water lines, gas distribution, and structural applications . As a leading erw steel pipe supplier, we produce these pipes in many sizes and grades.

LSAW Steel Pipe (Longitudinal Submerged Arc Welded)

This process uses a thick steel plate as the raw material. We bend the plate into a tube shape using a press or mold. Then, we weld the single longitudinal seam using submerged arc welding . This method uses filler metal, creating a very strong joint. LSAW pipes are ideal for the most demanding projects. They have large diameters and thick walls. They offer excellent resistance to high pressure and low temperatures . As a reliable lsaw steel pipe supplier, we recommend these for trunk pipelines and structural piling.

SSAW Steel Pipe (Spiral Submerged Arc Welded)

This type is also known as spiral welded pipe. The manufacturer forms the pipe by rolling a steel strip at an angle. This creates a spiral, helical weld seam . The production method is flexible and can create a range of diameters. It is often used for low-pressure applications and water transmission.

Selecting the correct pipe type is crucial. Your choice affects the entire project’s performance and safety. Here is a simple guide to help you decide.

For High-Pressure and Critical Use

①　Use seamless pipe for oil and gas exploration.

②　It offers the highest reliability and strength.

③　You should also consider LSAW pipe for large transmission lines.

④　This is especially true for harsh environments .

For Structural and General Use

1．Choose ERW pipe for construction and infrastructure.

2．It offers a great balance of strength and cost.

3．This is a perfect choice for fencing, scaffolding, and HVAC.

For Large-Diameter Transmission Pipelines

1.LSAW is the best choice for oil and gas trunk lines.

2.API standards often mandate this for sensitive areas.

3.SSAW can be a good option for less critical lines.

We understand the steel industry inside and out. Tianjin Yuantai Derun Pipe Manufacturing Group Co., Ltd. is a global leader in steel pipes and hollow sections. We have 18 wholly-owned subsidiaries and seven production bases. This scale gives us total control over quality and logistics.

Our quality assurance is second to none. We hold ISO9001, ISO14001, and OHSAS18001 certifications. We also possess EU CE, BV, JIS, DNV, ABS, and LEED certifications. These credentials prove our commitment to international standards. They guarantee that our products meet all global compliance requirements.

We are a steel pipe supplier you can trust. Our location in the Daqiuzhuang Industrial Zone is strategic. It is near National Highways 104 and 205. It is only 40 kilometers from Tianjin New Port. This position gives us excellent access to domestic and international logistics networks.

So, what are steel pipes called? The answer depends on the manufacturing method. They are called ERW, LSAW, SSAW, or seamless. Each type serves a distinct purpose. Each has unique advantages for different applications.

As a premier wholesale steel pipe manufacturer, we have the expertise and inventory to help you. We produce high-quality ERW, LSAW, and SSAW pipes for all purposes. Our global service excellence and technical capabilities make us the ideal partner. We invite you to contact us today to discuss your project requirements. Experience the reliability and quality that only a leading supplier can provide.