API 5L Grade A Steel Pipe
Key Specifications:
Standard: API 5L (Line Pipe Standard for Oil & Gas Industry)
Grade: Grade A (Basic carbon steel grade)
Material: Carbon steel (low alloy variations may apply)
Mechanical Properties:
Minimum Yield Strength (SMYS): 241 MPa (35 ksi)
Tensile Strength: 413–517 MPa (60–75 ksi)
Elongation: ≥30% (varies by diameter and wall thickness)
Applications:
Oil & gas transmission pipelines
Gathering lines
Low-pressure distribution systems
Manufacturing Process:
Seamless or welded (ERW/LSAW/HSAW)
Heat treatment (as required)
Testing & Inspection:
Hydrostatic testing
Non-destructive testing (NDT) such as ultrasonic (UT) or magnetic particle (MT)
Comparison with Other Grades:
Grade B: Higher strength (≥ 241 MPa yield, but often with better toughness)
X-Grades (e.g., X42, X52, X65): Higher strength for high-pressure applications
Common Suppliers:
Domestic & international manufacturers (e.g., Tenaris, TMK, domestic Chinese mills)
