ASTM A36 API 5L Carbon Steel Welded Pipe with ERW LSAW SSAW for Oil Gas Water

ASTM A36 and API 5L carbon steel welded pipes are manufactured using advanced welding technologies, including ERW (Electric Resistance Welding), LSAW (Longitudinal Submerged Arc Welding), and SSAW (Spiral Submerged Arc Welding). These pipes are widely used for oil and gas transportation, water transmission, structural engineering, piling, and industrial pipeline systems.

Manufactured from high-quality carbon steel, welded pipes offer excellent mechanical strength, dimensional accuracy, and cost-effectiveness for medium- and large-diameter pipeline projects. Available in various diameters, wall thicknesses, and lengths, they can be supplied with customized coatings, beveling, threading, and cutting services to meet international project requirements.

Pipeline systems for oil, natural gas, water supply, construction, and industrial facilities require steel pipes capable of withstanding internal pressure, external loads, and harsh environmental conditions. Selecting pipes with insufficient strength, poor weld quality, or inadequate corrosion protection can lead to leakage, structural failure, increased maintenance costs, and reduced service life.

As infrastructure and energy projects continue to expand, engineers and contractors increasingly require welded steel pipes that comply with international standards while offering reliable mechanical performance and economical installation.

Our carbon steel welded pipes are produced using strict quality control procedures and advanced welding equipment to ensure consistent weld integrity, dimensional accuracy, and mechanical performance.

Depending on project requirements, we provide ERW pipes for small and medium diameters, LSAW pipes for high-pressure transmission systems, and SSAW pipes for large-diameter water and piling applications. Additional processing services such as anti-corrosion coating, beveling, threading, cutting, hydrostatic testing, ultrasonic testing, and third-party inspection are available to support global pipeline projects.

• Oil & Gas Transmission: Suitable for crude oil pipelines, natural gas transportation systems, refinery projects, and petrochemical plants.
• Water Transmission: Used for municipal water supply, irrigation pipelines, drainage systems, desalination projects, and water treatment facilities.
• Structural Engineering: Applied in bridges, stadiums, warehouses, industrial buildings, steel structures, and foundation piling.
• Energy & Power Plants: Used in power stations, boiler systems, cooling water pipelines, and industrial utility systems.
• Construction Projects: Widely used for scaffolding, fencing, support columns, building frameworks, and infrastructure construction.

The production process of carbon steel welded pipes consists of several precision manufacturing steps:

1. Carbon steel coils or plates are inspected before production.
2. The material is formed into a cylindrical shape using advanced forming equipment.
3. The pipe is welded using ERW, LSAW, or SSAW technology according to the required specification.
4. The weld seam undergoes heat treatment and non-destructive testing to ensure strength and integrity.
5. The pipe is sized, straightened, and cut to the required length.
6. Surface treatments such as painting, galvanizing, or anti-corrosion coating are applied if required.
7. Each pipe is inspected, packaged, and prepared for international shipment.

Select the Appropriate Manufacturing Method:

• ERW Pipe - Suitable for small and medium diameter pipelines, structural applications, and general fluid transportation.
• LSAW Pipe - Ideal for high-pressure oil, gas, and offshore pipeline projects requiring excellent strength and dimensional accuracy.
• SSAW Pipe - Best suited for large-diameter water transmission, piling, and municipal infrastructure projects.

Choose the Correct Material Grade:

• Q235 / ASTM A36 - General structural applications.
• ASTM A53 - Water, steam, and low-pressure pipeline systems.
• API 5L Gr.B - Oil and gas transmission pipelines.
• Q345B / S355 - Higher-strength structural projects.

Consider Surface Protection:

• Black Painted
• Hot-Dip Galvanized
• 3PE Coating
• FBE Coating
• Anti-Corrosion Epoxy Coating

Select the Proper Pipe Dimensions: Choose the outside diameter, wall thickness, and length based on working pressure, flow capacity, installation environment, and applicable project standards.