Welcome to ALLLAND Steel Pipe Co., Ltd.
Welcome to ALLLAND Steel Pipe Co., Ltd.
ALLLAND Steel Pipe Supply
Welcome to ALLLAND Steel Pipe Manufacturing. API 5L PSL 2 is a high-grade pipeline steel standard for oil, natural gas, and water transmission systems, widely used in high-pressure, long-distance, and critical energy projects. Compared to PSL 1, PSL 2 imposes stricter requirements in terms of chemical composition control, mechanical properties, impact toughness, and non-destructive testing, thereby ensuring the safety and long-term stability of pipelines under complex operating conditions.
ALLLAND offers a full range of steel pipe products compliant with the API 5L PSL 2 standard, covering various steel grades (X42–X80), size ranges, and corrosion protection solutions to meet the diverse needs of global energy pipeline projects.
Alllandsteel is a steel pipe manufacturer based in China with 25 years of experience.
The facility spans 22,000 square meters, represents a RMB 700 million investment, and operates four production lines (JCOE, ERW, SMLS, SSAW) alongside five coating lines.
With an annual production capacity of 250,000 tons, the factory covers specifications ranging from Ø406 to Ø1524 and holds multiple international certifications (API/ASTM/EN/ISO/JIS). Focused on steel pipes, creating value for you!
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API 5L is a standard for pipeline steel pipes established by the American Petroleum Institute, specifying requirements for steel pipes used in oil, natural gas, and water transmission systems. PSL stands for Product Specification Level.
API 5L is divided into two levels:
PSL 1: Basic Level (Basic Requirements)
PSL 2: Advanced Level (Enhanced Requirements)
API 5L PSL 2 is a high-level pipeline steel standard for oil, natural gas, and water transmission systems, widely used in high-pressure, long-distance, and critical energy engineering projects.
O.D.:
1/8″ to 48″+
DN6 to DN1200+
W.T.:
SCH 10 to SCH XXS
1.5 mm – 50 mm+ (depending on OD & grade)
Length:
API 5L PSL 2 pipes are normally supplied in:
Manufacturing Process:
Surface Treatment & End:
3LPE / 3LPP / FBE/ Black Painting / Varnish/ Bare pipe
BE / PE / Plain End / Beveled End
Steel Grades:
In API 5L, the “X number” represents:
X = minimum yield strength (ksi) X = minimum yield strength (ksi) X = minimum yield strength (ksi)
Conversion: 1 ksi ≈ 6.895 MPa
Typical Applications:
ALLLAND Steel Pipe successfully supplied 800 metric tons of API 5L X60 PSL2 LSAW steel pipes for a major natural gas pipeline maintenance project in Central Asia.
Through strategic inventory management and production coordination, ALLLAND ensured on-time delivery to the high-pressure national natural gas pipeline system, supporting urgent infrastructure repairs ahead of winter.
API 5L PSL 2 specifies chemical composition limits; however, these are not fixed values but rather a range-based system defined by steel grade (X42–X80) that incorporates “low carbon + low impurities + carbon equivalent control + microalloying.”
| Element | Typical Control Requirement | Function |
|---|---|---|
| C (Carbon) | ≤ 0.24% (lower for high-strength grades) | Balances strength and weldability |
| Mn (Manganese) | 0.60–1.60% | Improves strength |
| P (Phosphorus) | ≤ 0.025% | Prevents brittle fracture |
| S (Sulfur) | ≤ 0.015–0.020% | Reduces inclusions and cracking risk |
Carbon Equivalent (CE) Control (PSL 2 Core)
CE = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15
There are slight variations among different steel grades:
Common limits:
This is the key distinction between PSL 2 and PSL 1.
PSL 2 requirements:
✔ CVN impact testing is mandatory
✔ Test temperatures must be specified (e.g., 0°C, -20°C, -40°C)
✔ Energy absorption requirements must be met
PSL 2 does not allow “extreme outliers.”
Yield Strength / SMYS
| Grade | Minimum Yield Strength |
|---|---|
| X42 | 290 MPa |
| X52 | 360 MPa |
| X60 | 414 MPa |
| X65 | 448 MPa |
| X70 | 483 MPa |
| X80 | 552 MPa |
Tensile Strength
PSL 2 is characterized by stricter upper and lower limit controls.
| Grade | Typical Tensile Strength Range |
|---|---|
| X42 | 415 – 565 MPa |
| X52 | 455 – 760 MPa |
| X60 | 517 – 760 MPa |
| X65 | 531 – 760 MPa |
| X70 | 565 – 760 MPa |
Elongation
The elongation at break for PSL 2 is not a fixed value, but rather a value calculated using a formula.
Basic formula: A = 1940 × U⁰.² / D⁰.⁹
| Grade | Minimum Elongation |
|---|---|
| X42 | ≥ 22% |
| X52 | ≥ 20–22% |
| X60 | ≥ 18–20% |
| X65 | ≥ 16–18% |
| X70 | ≥ 15–17% |
Yield / Tensile Ratio
PSL 2 Requirement: Rt0.5 / Rm ≤ 0.93
PSL 2 requires full traceability and mandatory non-destructive testing for each pipe.
| Item | API 5L PSL 1 | API 5L PSL 2 |
| Chemical Composition Control | Standard chemical limits | Stricter limits on C, S, P and CE (Carbon Equivalent) |
| Impact Testing (Charpy V-Notch) | Not mandatory (optional) | Mandatory for toughness verification |
| Non-Destructive Testing (NDT) | Limited inspection requirements | 100% NDT (UT/RT depending on pipe type) |
| Traceability System | Basic heat number tracking | Full traceability from steelmaking to final pipe |
| Mechanical Property Control | Minimum requirements only | Tighter range control for yield & tensile strength |
| Application Scope | General low-risk pipeline systems | High-pressure, low-temperature, critical oil & gas pipelines |
✔ Engineering Experience
PSL2 X60/X65/X70 supply experience
✔ Fast Delivery Capability
Emergency shipment capability (like 800T X60 case)
✔ International Certification
API 5L / ISO / CE / CNAS
ALLLAND has proven supply experience in API 5L PSL 2 pipeline projects, including large-diameter LSAW pipes for emergency gas transmission maintenance projects in Central Asia.
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