API 5L PSL1/A53 GR.B ERW STEEL PIPE 3″ 4″ 8″ 14″ 20″

I. Product Applications

API 5L PSL1 / ASTM A53 GR.B ERW steel pipes are widely used in oil, natural gas, and general industrial fluid transportation fields. They are particularly suitable for medium- and low-pressure transmission systems and structural engineering projects. Based on the above specifications (DN80–DN500, 3″–20″), the main applications include:

1.Oil and Natural Gas Transmission Pipelines
Suitable for onshore crude oil pipelines, natural gas transmission lines, and gathering systems.

2.Industrial Fluid Transportation Systems
Including water, steam, compressed air, and general chemical fluid transportation.

3.Urban Infrastructure Construction
Municipal water supply and drainage systems, fire protection piping systems, and energy pipeline networks.

4.Steel Structure and Engineering Projects
Can be used for support structures, pipe piles, and general load-bearing structural applications.

Among them:

• DN500 (20″) and DN350 (14″) are commonly used for main transmission pipelines.

• DN200 (8″), DN100 (4″), and DN80 (3″) are typically used for branch lines or supporting systems.

II. Core Advantages of LONGMA

1. Strict Compliance with International Standards

The products comply with API 5L PSL1 and ASTM A53 Grade B requirements, ensuring:

• Stable chemical composition

• Qualified mechanical properties

• Precise dimensional tolerances

• Reliable weld seam quality

2. Mature ERW Manufacturing Process

With many years of experience in ERW pipe production, LONGMA offers:

• Advanced high-frequency longitudinal welding technology

• Online ultrasonic testing (UT)

• 100% hydrostatic pressure testing

• Strict visual and dimensional inspection

This guarantees safe and stable performance of each pipe under pressure conditions.

3.Strong Multi-Specification Supply Capability

This order covers multiple sizes from 3″ to 20″, with a total quantity exceeding 1,300 pieces, demonstrating:

• Simultaneous production capability for both large and small diameters

• Fast production scheduling

• Stable delivery time control

It is highly suitable for EPC contractors seeking one-stop procurement solutions.

4. Extensive Export Experience

LONGMA has long served:

• The Middle East market

• The Southeast Asian market

• African and South American markets

We are familiar with technical standards and customs clearance requirements in different countries and can provide:

• EN 10204 3.1 material certificates

• Third-party inspection (SGS / BV / TUV)

• Customized packaging and marking

III. Conclusion

API 5L PSL1 / A53 GR.B ERW steel pipes, with their good strength, weldability, and cost-effectiveness, are an ideal choice for energy transmission and industrial pipeline systems.

Relying on a stable quality control system, mature production lines, and extensive international project supply experience, LONGMA is capable of providing safe, reliable, on-time, and cost-efficient pipeline solutions to customers worldwide.