Description
The Backbone of Reliable Pipeline Systems
When you’re running high-pressure transmission lines, every joint, every weld, every material choice matters. We’ve spent years perfecting our API 5L Grade B seamless line pipes because we know what’s at stake—pipeline integrity, operational safety, and long-term cost efficiency. Unlike welded alternatives, our seamless design eliminates weak points where failures often begin. That’s not marketing hype—it’s field-proven performance in over 200 onshore and offshore installations.
We use hot-rolled seamless technology, which gives us tight control over wall thickness uniformity and grain structure. This isn’t just about meeting API 5L specs—we exceed them. For example:
* Pipes undergo hydrostatic testing up to 95% of yield strength (minimum 415 MPa) to verify pressure resistance
* Ultrasonic and X-ray testing catch flaws as small as 0.8mm, not just surface-level checks
* Every batch includes full mechanical property reports, including Charpy V-notch impact values (typically 35–50 J at -20°C)
Where Performance Meets Practicality
You might wonder: “Why seamless when welded pipes cost less?” The answer lies in lifecycle costs. A single failure in a gas pipeline can cost millions in downtime and remediation. We’ve seen clients save 30–40% over 10 years by avoiding weld-related leaks and maintenance. Common applications include:
– High-pressure oil/gas gathering systems where temperature swings exceed 150°C
– Offshore flowlines with corrosive H2S/CO2 exposure (we recommend 3LPE coating here)
– Water injection lines requiring threaded ends with API 5L-compliant couplings
Our customization flexibility sets us apart. Need 28″ diameter with SCH 80 thickness? We’ve done it. Want FBE coating with 150-micron thickness and 24-hour salt spray resistance? Standard option. Even non-standard lengths (down to 1m for repair jobs) are available without long lead times.
Based in China’s steel hub, we combine cost efficiency with rigorous QC—think German testing equipment, Japanese rolling mills, and local labor rates that keep pricing competitive. All products carry API monogram, ISO 9001/14001, and CE certification, with mill test certificates shipped with every order.
Whether you’re specifying pipes for a new LNG terminal or replacing sections in aging infrastructure, we’ll work with your engineers to get the specs right. No project is too niche. Reach out for samples, technical discussions, or even joint visits to your job site—we’re here to help.
