Tianjin Brisk Steel is one of the manufacturers of API SPEC 5L PSL2 LSAW PIPE in China. Our products are mainly exported to the Middle East, Southeast Asia, Europe, New Zealand, and other regions.If you would like to learn more about our products, feel free to contact us and send your purchase list.
Manufacturing Process
- API 5L: The mandatory global standard for oil and gas transmission pipelines.
- PSL2: A high-standard quality grade; the mandated specification for mainline and subsea pipelines.
- LSAW: Formed via steel plate bending and double-sided (internal and external) submerged arc welding; features a single longitudinal weld seam; the primary pipe type for large-diameter, high-pressure pipelines.
- Positioning: A primary pressure-bearing steel pipe meeting the highest safety standards for long-distance oil and gas transmission mainlines; classified as a Grade I pressure-bearing component for pressure piping systems.
Forming Processes (Two Mainstream Routes: UOE and JCOE)
- UOE Process: U-pressing → O-closing → mechanical cold expanding. Features high circularity tolerance, suitable for mass production of standard pipe sizes (508–1220 mm OD)
- JCOE Process: Progressive segmented bending forming with lower equipment investment. Applicable for thick-wall pipes, non-standard diameters and small-batch orders (OD: 406–1422 mm, max wall thickness up to 70 mm)
JCOE Production Process
UOE Production Process
Size Specifications
- Outer Diameter Range: NPS 16"–NPS 84" (406 mm–2134 mm); the optimal pipe type for large-diameter, high-pressure pipelines.
- Wall Thickness: Standard SCH 20/SCH 40/SCH 80; increased wall thickness available upon request.
- Fixed Lengths: 6 m, 12 m, 18 m; custom cutting to project-specific lengths is also available.
- Pipe End Types: Beveled End (BE) for field welding, Plain End (PE) for flange connection. Plastic pipe caps are equipped to prevent collision damage and foreign matter intrusion.
External Anti-Corrosion Coating Options (30+ years design service life for buried pipelines)
| Coating Type | Executed Standard | Application Scenarios | Operating Temperature Range |
|---|---|---|---|
| Single-layer FBE | ISO21809, NACE RP0394 | High-temperature pipelines, subsea field joint coating | -30℃ ~ 110℃ |
| 3LPE (3-layer Polyethylene) | DIN30670 | Onshore trunk pipelines with excellent soil abrasion resistance & cost performance | -40℃ ~ 80℃ |
| 3LPP (3-layer Polypropylene) | ISO21809 | High-temperature medium transportation, subsea pipelines & rocky seabed with high impact risk | -40℃ ~ 140℃ |
- Bare pipes are only applied for short on-site process piping. External anti-corrosion coating is essential for long-distance transmission pipelines. Internal drag-reducing epoxy coating is optional for crude oil delivery to reduce transportation energy consumption.
Main Application Fields
- Onshore projects: Cross-border natural gas trunk lines, crude oil long-distance pipelines, urban high-pressure gas main pipelines, CCUS CO₂ transmission pipelines
- Offshore services: Subsea oil & gas pipelines, offshore platform risers, subsea gathering pipelines (PSL2 is a compulsory grade for subsea pipelines)
- Special working conditions: Sour gas pipelines containing H₂S, pipelines in frozen soil & frigid zones, high-pressure refined oil transmission pipelines
Pipe Applicable
Advantages & Disadvantages vs ERW, Seamless Pipe & SSAW Spiral Pipe
-
Compare with ERW pipe: Capable of large diameter & heavy wall production with higher pressure resistance and superior weld integrity, applicable for high-pressure trunk transmission pipelines
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Compare with SSAW spiral pipe: Single straight weld leads to uniform stress distribution, higher dimensional accuracy and stricter NDT acceptance criteria. SSAW pipes are mostly used for low-pressure municipal pipelines while PSL2 grade is rarely approved for trunk pipeline projects.
FAQ
Q: What steel grades can you supply for API 5L PSL2?
A: Full grades available: Gr.B, X42, X52, X60, X65, X70, X80. All strictly comply with API 5L 46th edition PSL2 requirements.
Q: What inspections are performed for PSL2 LSAW pipes?
A: 100% full inspection as per API standard:
- 100% hydrostatic pressure test
- 100% weld ultrasonic testing (UT)
- Full dimensional & visual inspection
- Batch tensile, bend, flattening & low-temperature Charpy impact test
Q: Are your pipes suitable for sour service (H₂S environment)?
A: Yes. We can supply sour service PSL2 LSAW pipes with additional HIC / SSC test certificates for acidic oil and gas field projects.
Q: Is PSL2 restricted to plain ends only?
A: PE (Plain End) allowed, Bevel End (most common): Standard 30° bevel, and Strictly prohibited Threaded End, Belled End.
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