Executive Standard: API 5L 45th Edition (Latest Version)
Product Grade: X65 PSL2, X70 PSL2
Welding Process: SAWL (Longitudinal Submerged Arc Welding)
Manufacturing Type: Longitudinal Welded Line Pipe
Applicable Service: Onshore / Offshore Oil & Gas Transmission, High-Pressure Fluid Pipeline
Packaging: Standard seaworthy packaging with steel belt binding, end plastic cap protection, anti-rust coating, avoiding collision and corrosion during transportation.
Shipping: Support sea freight, land freight and container transportation, suitable for global port delivery.
Technical Parameters
1.Chemical Composition (Max Mass Fraction, %)
Compliant with API 5L PSL2 strict component control, limiting carbon equivalent and harmful impurities to improve weldability and corrosion resistance .
|
Grade |
C |
Si |
Mn |
P |
S |
Carbon Equivalent (CE) |
|---|---|---|---|---|---|---|
|
X65 PSL2 |
0.22 |
0.45 |
1.60 |
0.025 |
0.015 |
0.42 |
|
X70 PSL2 |
0.22 |
0.45 |
1.70 |
0.025 |
0.015 |
0.45 |
2. Mechanical Properties (PSL2 Standard)
PSL2 grade implements dual upper and lower limit control for strength, with maximum yield-tensile ratio ≤0.93 to ensure pipeline structural safety .
|
Grade |
Yield Strength (MPa) |
Tensile Strength (MPa) |
Yield/Tensile Ratio |
Elongation (%) |
Charpy Impact Energy (-5℃) |
|---|---|---|---|---|---|
|
X65 PSL2 |
448 ~ 620 |
535 ~ 760 |
≤0.93 |
≥18 |
40J Average, 27J Min Single |
|
X70 PSL2 |
483 ~ 635 |
565 ~ 760 |
≤0.93 |
≥17 |
40J Average, 27J Min Single |
3.Size Specification Range
- Outer Diameter: 219mm ~ 2032mm (8" ~ 80")
- Wall Thickness: 6.0mm ~ 50.0mm
- Standard Length: 6m / 12m / Custom Fixed Length
- Tolerance: Strict API 5L dimensional tolerance, wall thickness deviation ≤±0.5mm, outer diameter deviation ≤±1.0mm
4.Testing & Quality Control
- 100% Non-Destructive Testing: Ultrasonic testing & X-ray testing for weld seams
- Hydrostatic Pressure Test: Full-length pressure resistance test according to API standard
- Physical & Chemical Inspection: Batch tensile, bending, impact and component analysis
- Visual & Dimensional Inspection: Full-size dimensional calibration and surface defect detection
Application Fields
API 5L X65/X70 PSL2 SAWL steel pipes are core materials for global energy transmission engineering, widely used in high-pressure, long-distance and harsh working condition projects:
- Long-Distance Oil & Gas Transmission Pipelines: Main pipelines for cross-regional crude oil, natural gas and refined oil transmission, suitable for high-pressure continuous delivery scenarios.
- Offshore Oil & Gas Engineering: Offshore platform pipelines, subsea transmission pipelines, adapting to low-temperature and high-corrosion marine environments (PSL2 offshore standard compliant) .
- Petrochemical Industry Pipeline: High-pressure process pipelines for petrochemical plants, used for transmission of chemical raw materials and industrial fluids.
- Urban Energy Supporting Projects: Urban natural gas main pipe networks, heating transmission pipelines and municipal energy supporting facilities.
- Mining & Industrial Fluid Delivery: High-pressure slurry transmission pipelines and industrial water circulation pipelines for mining projects.
- Cross-Country & Cold Region Projects: Adaptable to low-temperature environments in high-latitude cold regions, ensuring stable pipeline operation in extreme weather.
FAQ (Frequently Asked Questions)
Q1: What is the difference between PSL1 and PSL2 of API 5L pipe?
PSL2 is the premium grade of API 5L line pipe with far stricter quality requirements than PSL1. It implements upper and lower double limits for yield and tensile strength, limits the yield-tensile ratio within 0.93, mandates low-temperature Charpy impact tests, and has stricter control over carbon, sulfur, phosphorus and other impurity elements. PSL2 pipes feature higher safety, toughness and durability, suitable for high-pressure, offshore and key long-distance pipeline projects, while PSL1 is only for conventional low-pressure common pipelines .
Q2: What is SAWL longitudinal welded pipe, and what are its advantages over SSAW spiral pipe?
SAWL refers to longitudinal submerged arc welded pipe, with straight weld seam along the pipe body. Compared with SSAW spiral welded pipe, SAWL pipe has shorter and more uniform weld seams, lower welding residual stress, higher dimensional accuracy, better pressure resistance and fatigue resistance. It is more suitable for high-grade, high-pressure and long-distance key energy pipeline projects, with higher overall safety factor.
Q3: What working conditions are X65 and X70 grades suitable for respectively?
X65 PSL2 is suitable for medium and high-pressure conventional oil and gas transmission pipelines, urban main gas pipelines and general petrochemical pipelines with stable working conditions. X70 PSL2 has higher yield and tensile strength, applicable to long-distance cross-country trunk pipelines, offshore subsea pipelines, and high-pressure transmission projects in complex and harsh geological environments, which is the mainstream grade for large-scale energy transmission projects.
Q4: Can you provide customized sizes and anti-corrosion treatments?
Yes. We support full customization of outer diameter, wall thickness and fixed length. Conventional anti-corrosion treatments include 3PE, 2PE, FBE epoxy powder anti-corrosion, cement mortar lining, internal epoxy coating, etc. All customized products strictly comply with API 5L PSL2 standard and can provide matching inspection reports.
Q5: What quality documents can you provide for delivery?
We can provide complete official documents including API 5L standard factory test report (MTC), chemical composition report, mechanical property test report, NDT inspection report, hydrostatic test report, and product qualification certificate, which fully meet global project bidding and customs clearance requirements.
Q6: What is your production and delivery cycle?
Conventional size spot goods can be delivered within 7 working days. Customized non-standard size products have a production cycle of 15-25 working days. We support bulk order production and provide stable long-term supply for engineering projects.
Our address
Rm1406,14th/F No 208, Hongqi Road, Nankai Dist, Tianjin City ,China
Phone Number(WhatsApp/Wechat)
+8616622033809
alisa@tjshenzhoutong.com
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