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API 5L Grade B X42 X52 X65 Carbon Steel Line Pipe Seamless and Welded Steel Pipe
| Category | Specification |
| Steel Grades | API 5L Grade B, X42, X52, X56, X60, X65, X70, X80 |
| Specification Level | PSL1 / PSL2 |
| Outer Diameter (OD) | 1/2” – 40” (21.3 mm – 1016 mm), customizable |
| Wall Thickness | SCH 10 / SCH 20 / SCH 40 / SCH STD / SCH 80 / SCH XS / SCH 160 |
| Manufacturing Types | Seamless, ERW, LSAW, DSAW, SSAW, HSAW |
| End Types | Beveled Ends, Plain Ends, Threaded Ends (optional) |
| Length Range | SRL, DRL, 6m (20FT), 12m (40FT), or customized |
| Pipe Protection | Plastic Caps / Iron Caps / Steel End Protectors |
| Surface Treatment | Bare, Black Painting, Varnished, FBE, 3LPE / 3PE, 3PP, CWC (Concrete Weight Coated), CRA Clad/Lined |
1. Strict Compliance with International Standards
2. Wide Range of Steel Grades
3. Advanced Manufacturing Capability
4. Excellent Anti-Corrosion Protection
5. Reliable Mechanical Performance
API 5L Steel Pipe Size Chart
| Outside Diameter (OD) | Wall Thickness (WT) | Nominal Pipe Size (NPS) | Length | Steel Grade Available | Type |
| 21.3 mm (0.84 in) | 2.77 – 3.73 mm | ½″ | 5.8 m / 6 m / 12 m | Grade B – X56 | Seamless / ERW |
| 33.4 mm (1.315 in) | 2.77 – 4.55 mm | 1″ | 5.8 m / 6 m / 12 m | Grade B – X56 | Seamless / ERW |
| 60.3 mm (2.375 in) | 3.91 – 7.11 mm | 2″ | 5.8 m / 6 m / 12 m | Grade B – X60 | Seamless / ERW |
| 88.9 mm (3.5 in) | 4.78 – 9.27 mm | 3″ | 5.8 m / 6 m / 12 m | Grade B – X60 | Seamless / ERW |
| 114.3 mm (4.5 in) | 5.21 – 11.13 mm | 4″ | 6 m / 12 m / 18 m | Grade B – X65 | Seamless / ERW / SAW |
| 168.3 mm (6.625 in) | 5.56 – 14.27 mm | 6″ | 6 m / 12 m / 18 m | Grade B – X70 | Seamless / ERW / SAW |
| 219.1 mm (8.625 in) | 6.35 – 15.09 mm | 8″ | 6 m / 12 m / 18 m | X42 – X70 | ERW / SAW |
| 273.1 mm (10.75 in) | 6.35 – 19.05 mm | 10″ | 6 m / 12 m / 18 m | X42 – X70 | SAW |
| 323.9 mm (12.75 in) | 6.35 – 19.05 mm | 12″ | 6 m / 12 m / 18 m | X52 – X80 | SAW |
| 406.4 mm (16 in) | 7.92 – 22.23 mm | 16″ | 6 m / 12 m / 18 m | X56 – X80 | SAW |
| 508.0 mm (20 in) | 7.92 – 25.4 mm | 20″ | 6 m / 12 m / 18 m | X60 – X80 | SAW |
| 610.0 mm (24 in) | 9.53 – 25.4 mm | 24″ | 6 m / 12 m / 18 m | X60 – X80 | SAW |
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PSL 1 (Product Specification Level 1) : For pipelines built to a basic standard quality level.
PSL 2 (Product Specification Level 2) : Using higher mechanical properties, tighter chemical controls and NDT, more aggressive specification.
| Item | PSL1 | PSL2 | Notes |
| Chemical Composition Control | Standard limits on C, Mn, P, S | Stricter limits, lower P and S; additional microalloy element control allowed | PSL2 is more suitable for low-temperature and corrosive environments |
| Yield Strength (MPa) | According to grade specification | Same as PSL1; slightly higher for some high-grade steels | Basic mechanical requirements are similar |
| Tensile Strength (MPa) | According to grade specification | Same as PSL1 | |
| Elongation (%) | According to grade specification | Same as PSL1 | |
| Low-Temperature Impact (Charpy V-Notch) | Optional or per end-use requirement | Mandatory; typically tested at -20°C or -50°C | Enhances toughness at low temperature |
| Weldability | Meets standard requirements | Stricter, weldability tests often required | PSL2 demands higher weld performance |
| Dimensional Tolerance | Standard range | Stricter | PSL2 has tighter control on diameter and wall thickness |
| Defect Control / NDT | Standard inspection; UT/RT optional | Mandatory UT/RT/MPI | Ensures higher pipeline safety |
| Application Environment | General pipeline transportation | High-pressure, low-temperature, corrosive pipelines | PSL2 is preferred for projects with high safety requirements |
| Cost | Relatively lower | Slightly higher | Due to stricter inspection and manufacturing requirements |
Oil & Gas Transmission Pipeline
API 5L steel pipe is widely used for transporting crude oil, natural gas, and petroleum products over long distances.
It provides high strength and pressure resistance, making it ideal for both onshore and offshore pipeline systems.
Water Supply & Drainage Systems
These pipes are commonly used in municipal and industrial water transportation projects.
With anti-corrosion coatings, API 5L pipes ensure long service life in underground and wet environments.
Offshore & Marine Engineering
API 5L steel pipes are used in subsea pipelines, offshore platforms, and coastal infrastructure.
They are typically protected with 3LPE, 3PE, or concrete weight coating to withstand seawater corrosion and high pressure.
Industrial & Infrastructure Construction
These pipes are also applied in refineries, power plants, chemical plants, and bridge or foundation projects.
High-grade API 5L pipes (X60–X80) are suitable for heavy-duty structural and high-pressure applications.
PSL2 has stricter requirements in:
Chemical composition
Mechanical properties
Impact testing
Non-destructive testing (NDT)
Q: What information do I need to provide to get a quotation?
A: To offer an accurate price, please share:
Steel grade (B, X42–X80)
OD and wall thickness
Length and quantity
Coating requirements (if any)
Destination port
Send your inquiry now and we will reply within 24 hours with a competitive quotation.
Q: Can you support urgent or large-scale projects?
A: Yes. We have strong production capacity for bulk orders and project-based supply.
For urgent projects, we can optimize production scheduling to meet tight deadlines.
Contact us with your project timeline for priority support.
Q: How do I choose PSL1 or PSL2 for my project?
A: PSL1 is suitable for general pipeline applications, while PSL2 is recommended for high-pressure, offshore, and critical energy projects.
If you are unsure, our technical team can recommend the right specification based on your project conditions.
Contact Details
Get API 5L Pipe Quote Now
Send your inquiry with:
Grade (X52 / X70 etc.)
Size
Quantity
Fast response within 12 hours
Address
Kangsheng development industry zone,
Wuqing district, Tianjin city, China.
Phone
Hours
Monday-Sunday: 24-hour Service
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