API 5L X65 PSL2 Seamless Pipe
API 5L X65 PSL2 Seamless Pipe is a high-performance carbon steel line pipe used extensively in the oil and gas industry. "X65" denotes a minimum yield strength of 65,000 psi (450 MPa), while "PSL2" refers to Product Specification Level 2, which carries stricter requirements for chemical composition, notch toughness, and mandatory testing. The Seamless (SMLS) manufacturing process ensures the absence of a longitudinal weld, making it ideal for high-pressure, high-temperature, and corrosive environments.
Upgrading to X65 can significantly reduce pipeline weight and shipping costs. Contact us for a cost-optimization analysis today.
API 5L X65 PSL2 Epoxy Coated Pipe Specifications Table
| Item | Description |
| Standard | API Spec 5L (46th Ed. or later) / ISO 3183 |
| Grade | X65 / L450 |
| Product Specification Level | PSL2 |
| Manufacturing Type | Seamless (SMLS) |
| Outer Diameter (OD) | 1/2" – 24" (Standard range for Seamless) |
| Wall Thickness (WT) | SCH 20, SCH 40, SCH 80, SCH 160, SCH XXS, etc. |
| Length | Single Random (SRL), Double Random (DRL), or Fixed Length |
| End Finish | Beveled End (BE), Plain End (PE) |
| Application | High-pressure gas/oil transmission, Subsea pipelines, Sour Service |
Chemical Composition and Mechanical Properties
Chemical Composition (Max % for PSL2 SMLS)
Note: PSL2 requires mandatory Carbon Equivalent (CE) limits to ensure superior weldability.
| Element | Max % (PSL2 X65 SMLS) |
| Carbon (C) | 0.24 |
| Manganese (Mn) | 1.60 |
| Phosphorus (P) | 0.025 |
| Sulfur (S) | 0.015 |
| Silicon (Si) | 0.45 |
| Nb / V / Ti | May be added (Total sum usually ≤ 0.15) |
| CEpcm | ≤ 0.25 (If C ≤ 0.12%) |
| CEiiw | ≤ 0.43 (If C > 0.12%) |
Mechanical Properties
PSL2 specifies both minimum and maximum limits to prevent material brittleness.
| Property | Range (PSL2 X65) |
| Yield Strength (Min - Max) | 450 MPa (65.3 ksi) - 600 MPa (87.0 ksi) |
| Tensile Strength (Min - Max) | 535 MPa (77.6 ksi) - 760 MPa (110.2 ksi) |
| Yield to Tensile Ratio | ≤ 0.93 |
| Toughness (Charpy V-Notch) | Mandatory testing at 0°C or lower |
API X65 PSL2 Carbon Steel Wall Thickness Table (SMLS)
Common schedules and thicknesses in mm.
| NPS | OD (mm) | SCH 40 (mm) | SCH 80 (mm) | SCH 160 (mm) | SCH XXS (mm) |
| 2" | 60.3 | 3.91 | 5.54 | 8.74 | 11.07 |
| 4" | 114.3 | 6.02 | 8.56 | 13.49 | 17.12 |
| 8" | 219.1 | 8.18 | 12.70 | 23.01 | 22.23 |
| 12" | 323.8 | 10.31 | 17.48 | 33.32 | 25.40 |
| 16" | 406.4 | 12.70 | 21.44 | 40.49 | 31.75 |
API 5L X65 PSL2 Pipe Pressure Rating Table
Estimated based on Barlow's Formula (
P=2St/DP=2St/D
) using a Design Factor of 0.72.
Values in PSI (Approximate; for reference only).
| Outer Diameter (OD) | Wall Thickness (WT) | Estimated Working Pressure (psi) |
| 4.5" (114.3mm) | 8.56mm (SCH 80) | ~6,500 psi |
| 8.625" (219.1mm) | 12.7mm (SCH 80) | ~5,100 psi |
| 12.75" (323.8mm) | 17.48mm (SCH 80) | ~4,700 psi |
X65 PSL2 Carbon Steel Seamless Pipe Material Equivalent
| Standard | Equivalent Grade |
| ISO 3183 | L450 |
| Chinese GB/T 9711 | L450 |
| European EN 10208-2 | L450NB / L450QB |
| Canadian CSA Z245.1 | Grade 448 |
| ASTM | None (No direct 1:1 equivalent in high-strength ASTM) |
API 5L Grade X65 PSL2 Pipe Line Coating Standard
To prevent corrosion, X65 pipes are typically supplied with external and/or internal coatings:
3LPE (Three-Layer Polyethylene): DIN 30670, ISO 21809-1 (Most common; excellent mechanical protection).
3LPP (Three-Layer Polypropylene): ISO 21809-1 (Suitable for high-temperature environments).
FBE (Fusion Bonded Epoxy): AWWA C213, CSA Z245.20 (Superior adhesion and chemical resistance).
Internal Epoxy Lining: API RP 5L2 (Reduces friction and improves flow efficiency).
Concrete Weight Coating (CWC): ISO 21809-5 (Used primarily for subsea pipelines).
Delivery Condition of API X65 PSL2 Carbon Steel Line Pipe
The delivery condition (heat treatment) must be specified on the Mill Test Report (MTR):
N (Normalized / Normalizing Rolled): Refines the grain structure for better toughness.
Q (Quenched and Tempered): Quenching followed by tempering. This is the most common delivery condition for X65 Seamless pipe, providing an optimal balance of high strength and low-temperature toughness.
M (Thermomechanical Rolled): TMCP process (usually applied to welded pipes like LSAW).
API 5L X65 PSL2 pipe factory
API 5L X65 PSL2 Line Pipe test equipments
API 5L X65 PSL2 Oil and Gas Pipeline certificate
FAQ
What does PSL2 mean on pipe?
On a steel pipe, PSL2 stands for Product Specification Level 2. It is a classification within the API 5L (Line Pipe) standard that indicates a higher quality and more rigorous set of manufacturing requirements compared to the standard PSL1.
What does X65 pipe mean?
X65 pipe is a grade of high-strength carbon steel line pipe defined by the API 5L (American Petroleum Institute) specification. It is one of the most common materials used for the long-distance, high-pressure transportation of oil and natural gas.
Hot Tags: api 5l x65 psl2 seamless pipe, China api 5l x65 psl2 seamless pipe manufacturers, suppliers, factory, api 5l pipe for lubricant transportation, api 5l pipe for hydrocarbon transportation, api 5l pipe with strict quality control, line pipe for oil and gas, api 5l grade x65 pipe, api 5l pipe for industrial gases transportation
You Might Also Like
Send Inquiry