API 5L X52 PSL1 LSAW STEEL PIPE 3LPE DIN30670

Product Applications

1️⃣ Oil and Gas Transmission Pipelines

API 5L X52 grade pipes are widely used in onshore and offshore oil and natural gas transmission systems. The large diameters (711–762 mm) make them suitable for main trunk pipelines and long-distance transmission lines.

2️⃣ Crude Oil and Refined Product Transportation

The X52 grade provides high yield strength, making it ideal for high-pressure crude oil and petroleum product transportation.

3️⃣ Water Transmission and Infrastructure Projects

Suitable for large-scale water supply systems, cross-country water pipelines, and infrastructure backbone networks.

4️⃣ Harsh Environmental Applications

With 3LPE anti-corrosion coating compliant with DIN 30670, the pipes offer excellent resistance to soil corrosion, moisture, and chemical exposure, making them ideal for:

• Buried pipelines
• Desert environments
• Coastal and high-humidity regions

LONGMA’s Core Advantages

1️⃣ Advanced LSAW Production Technology

LONGMA adopts mature longitudinal submerged arc welding technology, ensuring:

• Deep weld penetration and high weld strength
• Excellent dimensional accuracy
• Strong resistance to internal pressure
• Reliable performance in large-diameter applications

2️⃣ Strict Quality Control System

Each pipe undergoes:

• 100% ultrasonic testing (UT)
• X-ray inspection of weld seams
• Hydrostatic pressure testing
• Mechanical and chemical property verification

This ensures compliance with API 5L PSL1 technical requirements.

3️⃣ High-Performance 3LPE Coating Capability

LONGMA provides in-house or integrated 3LPE coating solutions featuring:

• Fusion bonded epoxy (FBE) primer layer
• Adhesive layer
• Polyethylene outer layer

This three-layer system ensures long-term corrosion resistance and extended pipeline service life.

4️⃣ Strong Project Supply Capability

With experience in large international pipeline projects, LONGMA offers:

• Stable large-diameter production capacity
• Customized length manufacturing
• Third-party inspection support (SGS / BV / TUV)
• Professional export packaging and logistics

Conclusion

API 5L X52 PSL1 LSAW steel pipes with 3LPE coating are ideal for high-strength, long-distance oil, gas, and water transmission projects. Their large diameter, high yield strength, and superior anti-corrosion performance make them a reliable solution for demanding environments.

With advanced manufacturing technology, strict quality control, and strong international project experience, LONGMA is a dependable partner for global pipeline engineering projects.