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Help CenterAPI 5L Line Pipe Oil & Gas Pipeline – Seamless – OD 6mm to 204mm
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Oil & Gas Pipeline – Seamless – OD 6mm to 204mm
Grades A25, A, B, X42, X46, X52, X56, X60, X65, X70, X80
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API 5L Line Pipe
Oil & Gas Pipeline – Seamless – OD 6mm to 204mm
Grades A25, A, B, X42, X46, X52, X56, X60, X65, X70, X80
Product Overview
API 5L line pipe is the global standard for pipeline transportation systems in the oil and gas industry . It is used to transport gas, water, and oil from producing wells to refineries, processing plants, and distribution networks .
Our API 5L line pipe is manufactured in seamless construction across a compact diameter range from 6mm to 204mm (0.236″ – 8.0″) , making it ideal for:
Gathering lines – Transport from wellhead to processing
Flow lines – Connection between wellhead and manifold
Distribution pipelines – Local gas and water distribution
Small-diameter trunk lines – Regional transport
✅ API 5L certified – Latest edition (46th Edition / ISO 3183)
✅ API Monogram licensed – Full traceability to heat and mill
✅ Seamless construction – No weld seam – pressure integrity
✅ Compact size range – 6mm to 204mm – one-stop sourcing
✅ 100% hydrostatic and NDT tested
✅ EN 10204 Type 3.1 MTC with full traceability
✅ Factory direct | Stock available | Fast delivery
Key Specifications
| Parameter | Details |
|---|---|
| Standard | API 5L (46th Edition / ISO 3183) |
| Product Type | Line Pipe (Oil & Gas Pipeline) |
| Manufacturing Process | Seamless |
| PSL (Product Specification Level) | PSL 1 or PSL 2 |
| OD Range | 6mm – 204mm (0.236″ – 8.0″) |
| Wall Thickness | 0.8mm – 25mm (depending on OD) |
| Length | 4m – 12m (fixed or random) |
| End Finish | Plain / Beveled / Threaded |
| Surface Finish | Black / Bare / Oiled / Coated (3LPE, FBE) |
📌 Size note: Our specialty is the 6mm to 204mm diameter range – ideal for gathering lines, flow lines, and small-diameter transmission pipelines where seamless construction is critical for pressure integrity .
Available Grades – API 5L Line Pipe (PSL 1 & PSL 2)
| Grade | Min Yield (psi) | Min Yield (MPa) | Min Tensile (MPa) | PSL | Application |
|---|---|---|---|---|---|
| A25 | 25,000 | 172 | 310 | 1 | Very low pressure, non-critical |
| A | 30,000 | 207 | 330 | 1, 2 | Low pressure distribution |
| B | 35,000 | 241 | 414 | 1, 2 | General purpose – most common |
| X42 | 42,000 | 290 | 414 | 1, 2 | Medium pressure |
| X46 | 46,000 | 317 | 434 | 1, 2 | Medium pressure |
| X52 | 52,000 | 359 | 455 | 1, 2 | Medium-high pressure – very common |
| X56 | 56,000 | 386 | 490 | 1, 2 | High pressure |
| X60 | 60,000 | 414 | 517 | 1, 2 | High pressure |
| X65 | 65,000 | 448 | 531 | 1, 2 | High pressure – common for gas |
| X70 | 70,000 | 483 | 565 | 1, 2 | Very high pressure |
| X80 | 80,000 | 552 | 621 | 2 | Ultra-high pressure |
Physical property/laboratory test requirements per API 5L: Tensile, hardness, and (for PSL 2) Charpy V-notch impact testing are required based on PSL, grade, and diameter.
💡 Grade B is the most common grade for general pipeline applications . X52 and X65 are popular for higher pressure gas transmission in this diameter range .
PSL 1 vs PSL 2 – Difference for API 5L Line Pipe
| Feature | PSL 1 | PSL 2 |
|---|---|---|
| Chemical limits | Standard | Stricter (lower P, S, etc.) |
| Mechanical testing | Tensile only | Tensile + Impact + Hardness |
| Impact testing | Not required | Required (Charpy V-notch) |
| NDT | Optional | 100% required |
| Traceability | Basic | Full (heat to pipe) |
| Cost | Lower | Higher |
| When to use | Non-critical, low pressure | Critical service, high pressure, sour gas, low temp |
💡 Selection tip: Use PSL 2 for sour service (H₂S), low temperature, high pressure, and offshore applications . Use PSL 1 for standard, non-critical onshore pipelines .
Line Pipe Function – Where OD 6-204mm Fits in the Pipeline System
| Pipeline Type | Typical OD Range | Function | Our Coverage |
|---|---|---|---|
| Gathering lines | 2″ – 8″ (50-200mm) | Wellhead → processing | ✅ Full coverage |
| Flow lines | 2″ – 6″ (50-150mm) | Well → manifold | ✅ Full coverage |
| Distribution lines | 1″ – 8″ (25-200mm) | Local gas/water | ✅ Full coverage |
| Small trunk lines | 6″ – 8″ (150-200mm) | Regional transport | ✅ Upper range |
| Instrumentation | 1/4″ – 2″ (6-50mm) | Control lines | ✅ Full coverage |
💡 Key application: The 50mm to 150mm (2″-6″) range is the sweet spot for oil and gas gathering systems .
Available Sizes – OD 6-204mm (Complete Range)
| OD (mm) | OD (inch approx) | Available WT (mm) | Typical Application |
|---|---|---|---|
| 6 – 10 | 1/4″ – 3/8″ | 0.8 – 2.0 | Instrumentation, control lines |
| 10 – 20 | 3/8″ – 3/4″ | 1.0 – 2.5 | Small gathering, pneumatic |
| 20 – 30 | 3/4″ – 1-1/4″ | 1.5 – 3.0 | Flow lines, distribution |
| 30 – 50 | 1-1/4″ – 2″ | 2.0 – 4.0 | Gathering lines – common |
| 50 – 80 | 2″ – 3″ | 2.5 – 5.0 | Flow lines, small transmission |
| 80 – 100 | 3″ – 4″ | 3.0 – 6.0 | Trunk lines – common |
| 100 – 150 | 4″ – 6″ | 3.5 – 8.0 | Main gathering, transmission |
| 150 – 204 | 6″ – 8″ | 4.0 – 25.0 | Transmission pipelines |
💡 Most popular sizes in oil & gas gathering: 60.3mm (2″), 73.0mm (2-7/8″), 88.9mm (3-1/2″), 114.3mm (4-1/2″), 141.3mm (5-1/2″), 168.3mm (6-5/8″) .
Chemical Composition – API 5L Line Pipe (PSL 2 – Typical Max)
| Grade | C max | Mn max | P max | S max | Si max | V+Nb+Ti | CE max |
|---|---|---|---|---|---|---|---|
| B | 0.22 | 1.20 | 0.025 | 0.015 | 0.45 | — | 0.43 |
| X42 | 0.22 | 1.30 | 0.025 | 0.015 | 0.45 | — | 0.43 |
| X52 | 0.22 | 1.40 | 0.025 | 0.015 | 0.45 | — | 0.43 |
| X60 | 0.22 | 1.40 | 0.025 | 0.015 | 0.45 | 0.15 | 0.43 |
| X65 | 0.22 | 1.45 | 0.025 | 0.015 | 0.45 | 0.15 | 0.43 |
| X70 | 0.22 | 1.65 | 0.025 | 0.015 | 0.45 | 0.15 | 0.43 |
| X80 | 0.22 | 1.85 | 0.025 | 0.015 | 0.45 | 0.15 | 0.43 |
⚠️ Note for sour service: Maximum P = 0.015%, S = 0.005%, CE limited, hardness ≤250 HV (22 HRC) per ISO 15156 .
Mechanical Properties – API 5L Line Pipe (PSL 2)
| Grade | Yield (MPa min) | Yield (psi min) | Tensile (MPa min) | Tensile (MPa max) | Y/T ratio max |
|---|---|---|---|---|---|
| B | 241 | 35,000 | 414 | 758 | 0.93 |
| X42 | 290 | 42,000 | 414 | 758 | 0.93 |
| X52 | 359 | 52,000 | 455 | 758 | 0.93 |
| X60 | 414 | 60,000 | 517 | 758 | 0.93 |
| X65 | 448 | 65,000 | 531 | 758 | 0.93 |
| X70 | 483 | 70,000 | 565 | 758 | 0.93 |
| X80 | 552 | 80,000 | 621 | 827 | 0.93 |
Impact Test Requirements (PSL 2 – Charpy V-notch)
| Grade | Test Temp | Energy (J avg) | Shear Area (% min) |
|---|---|---|---|
| B and higher | 0°C | ≥27 | — |
| For low temp | As specified | ≥27 | ≥50 |
📌 Impact testing is required for PSL 2 grades but not for PSL 1 .
Key Advantages – API 5L Line Pipe (OD 6-204mm)
| Feature | Benefit |
|---|---|
| API Monogram certified | Full traceability to heat and mill – audit-ready documentation |
| Seamless construction | No weld seam – pressure integrity for critical service |
| Compact size range | 6mm to 204mm – single source for gathering and distribution |
| Full grade range | A25 to X80 – match grade to operating pressure |
| PSL 1 or PSL 2 | Choose based on service criticality |
| Sour service capability | PSL 2 with hardness control meets NACE MR0175 |
| 100% hydrostatic and NDT tested | Guaranteed pressure integrity |
| Full traceability | EN 10204 Type 3.1 MTC with heat number |
| Stock availability | Common sizes (60-168mm) and grades (B, X52, X65) ready to ship |
Line Pipe Grade Selection by Operating Pressure
| Operating Pressure (PSI) | Operating Pressure (MPa) | Recommended Grade | PSL |
|---|---|---|---|
| A25 or A | 1 | ||
| 300 – 600 | 2 – 4 | B | 1 or 2 |
| 600 – 900 | 4 – 6 | X42 | 1 or 2 |
| 900 – 1,200 | 6 – 8 | X52 | 1 or 2 |
| 1,200 – 1,500 | 8 – 10 | X60 | 2 |
| 1,500 – 1,800 | 10 – 12 | X65 | 2 |
| 1,800 – 2,200 | 12 – 15 | X70 | 2 |
| >2,200 | >15 | X80 | 2 |
💡 **Grade B is the most common for general pipeline applications up to 600 PSI . X52 and X65 are very popular for higher pressure gas gathering in this diameter range .
Quality Testing & Inspection – API 5L Line Pipe
| Test | Standard / Method | PSL 1 | PSL 2 |
|---|---|---|---|
| Hydrostatic Test | API 5L | 100% | 100% |
| Ultrasonic Testing (UT) | ASTM E213 | Optional | 100% |
| Eddy Current (ET) | API 5L | Optional | Optional |
| Tensile Test | API 5L / ISO 6892 | 1 per batch | 1 per batch |
| Hardness Test | API 5L | Optional | 1 per batch |
| Impact Test (Charpy) | API 5L / ASTM E23 | Not required | 1 per batch |
| Hardness for sour service | NACE TM0177 | — | ≤250 HV (22 HRC) |
| Dimensional Inspection | API 5L | 100% | 100% |
Mill Test Certificate – API 5L Line Pipe
API 5L Certificate of Compliance – Standard (API Monogram licensed)
EN 10204 Type 3.2 – Available upon request (third-party: SGS, BV, TUV, DNV)
Traceability: Full traceability from melt to finished pipe (heat number → pipe)
Impact and hardness test reports – Included for PSL 2 grades
Sour service documentation – Available for PSL 2 with hardness control
Processing Services – API 5L Line Pipe
| Service | Description |
|---|---|
| Cutting | Precision cutting to exact length (±1mm) |
| Beveling | For welding preparation (30°-37.5°) |
| Threading | NPT, BSP, or custom threads |
| Surface coating | 3LPE, FBE, black paint, oiled, galvanized |
| End finishing | Plain / Beveled / Threaded |
| Marking | API stencil per API 5L requirement |
Packaging & Shipping – API 5L Line Pipe (OD 6-204mm)
| Item | Details |
|---|---|
| Packaging | Hexagonal bundles (small OD) or steel strapping |
| Protection | Anti-rust oil + plastic end caps |
| Bundle weight | 500-2,000 kg per bundle |
| Marking | API stencil: Grade, size, heat number, API monogram, PSL |
| Lead time | 7–15 days (stock sizes), 20–30 days (custom) |
| Port | Tianjin / Shanghai / Guangzhou |
Why Choose Our API 5L Line Pipe (OD 6-204mm)?
| Advantage | Description |
|---|---|
| API Monogram licensed | Full API Q1 quality management system – audit-ready |
| Seamless construction | Pressure integrity – no weld seam failures |
| Compact range specialist | 6mm to 204mm – ideal for gathering and distribution |
| Full grade range PSL 1/2 | A25 to X80 – one-stop sourcing |
| Sour service capability | PSL 2 with hardness ≤250 HV meets NACE MR0175 |
| 100% tested | Hydrostatic + NDT on every pipe |
| Full traceability | EN 10204 3.1 MTC with heat number |
| Stock availability | Common sizes and grades (B, X52, X65) ready to ship |
| Global export | Shipped to pipeline projects worldwide |
Contact for Quote – API 5L Line Pipe (OD 6-204mm)
Please provide the following details for your pipeline project:
Grade : A25 / A / B / X42 / X52 / X60 / X65 / X70 / X80
PSL : 1 or 2
Sour service required? : Yes / No
OD (mm) : _______ (6 – 204mm range)
WT (mm) : _______
Length (m) : _______
Quantity : _______ (meters / tons / pieces)
End Finish : Plain / Beveled / Threaded
Coating : Black / Oiled / 3LPE / FBE / None
Inspection : Standard / Third-party (SGS/BV/TUV/DNV)
📧 Email: yjhtrade@gmail.com
📞 WhatsApp: +86 15106174543
🌐 Website:
Reply within 24 hours.
FAQ – API 5L Line Pipe (OD 6-204mm)
Q1: What is API 5L line pipe used for?
A: API 5L line pipe is used for pipeline transportation systems in the oil and gas industry – gathering lines, flow lines, distribution pipelines, and small-diameter transmission lines .
Q2: What is the OD range you supply?
A: 6mm to 204mm (0.236″ – 8.0″) – a compact range ideal for gathering systems and distribution networks .
Q3: What is the difference between PSL 1 and PSL 2?
A: PSL 2 has stricter chemical limits, requires impact and hardness testing, 100% NDT, and full traceability . Use PSL 2 for sour service, low temperature, high pressure, and critical applications .
Q4: Which grade is most common?
A: Grade B is the most common for general pipeline applications up to 600 PSI . X52 and X65 are popular for higher pressure gas gathering in this diameter range .
Q5: Is the pipe seamless or welded?
A: Seamless construction – no weld seam, critical for pressure integrity in small-diameter high-pressure service .
Q6: Is API 5L suitable for sour service (H₂S)?
A: Yes, PSL 2 with hardness control . For sour service, specify PSL 2 with hardness ≤250 HV (22 HRC) per NACE MR0175 .
Q7: Does API 5L require impact testing?
A: For PSL 2 – yes (Charpy V-notch at 0°C min 27J) . For PSL 1 – no .
Q8: Do you provide third-party inspection?
A: Yes. SGS, BV, TUV, DNV, or any customer-specified agency.
Q9: What is the maximum length you can supply?
A: Standard up to 12 meters. Longer lengths up to 18 meters available upon request.
Q10: Do you offer free samples?
A: 30cm sample available upon request. Shipping fee applies.
Related Products – Pipeline Systems
API 5L Line Pipe – Pipeline transport (this product)
API 5CT Casing – Wellbore casing
API 5CT Tubing – Production tubing
API 5L Fittings – Elbows, tees, reducers
API 5L Flanges – Pipeline connections
3LPE / FBE Coating – Corrosion protection
Tags: API 5L Line Pipe Oil Pipeline Gas Pipeline Seamless Line Pipe Grade B X52 X65 PSL2 Sour Service API Monogram
Quick Reference: API 5L Grade Selection by Pressure (OD 6-204mm)
| Pressure (PSI) | Pressure (MPa) | Grade | PSL | Typical Application |
|---|---|---|---|---|
| A | 1 | Very low pressure distribution | ||
| 300-600 | 2-4 | B | 1 or 2 | General purpose – most common |
| 600-900 | 4-6 | X42 | 1 or 2 | Medium pressure gathering |
| 900-1,200 | 6-8 | X52 | 1 or 2 | Popular for gas gathering |
| 1,200-1,500 | 8-10 | X60 | 2 | High pressure transmission |
| 1,500-1,800 | 10-12 | X65 | 2 | High pressure gas – very common |
| 1,800-2,200 | 12-15 | X70 | 2 | Very high pressure |
| >2,200 | >15 | X80 | 2 | Ultra-high pressure |
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