API 5L X56 Pipe

ParameterDetails
Nominal Pipe Size (NPS)Seamless: 1/2" to 48"
Welded ERW: 1/2" to 20"
LSAW and SSAW: 16" to 100"
Outside Diameter (OD)Varies depending on the NPS and wall thickness. Refer to specific API 5L tables for exact values.
Wall Thickness (WT)Schedule 10, 40, 80, 160, STD, XS, XXS (custom sizes available)
LengthSingle Random Length (SRL): 5 meters to 14 meters
Double Random Length (DRL): 5.8 meters, 6.0 meters (20FT), 11.8 meters, 12.0 meters (40FT)
EndsPlain ends, Beveled ends, Threaded ends
Manufacturing TypeSeamless, Welded ERW (Electric Resistance Welded), LSAW (Longitudinal Submerged Arc Welded), SSAW (Spiral Submerged Arc Welded)
Available GradesX56, X56N, X56Q, X56M, X56R (with specific mechanical property requirements)
Product Specification Levels (PSL)PSL1, PSL2
ApplicationsOil and gas pipelines, Offshore platforms, Refineries, Petrochemical plants
Categories: ,

Description

Product Description API 5L X56 Pipe

API 5L X56 pipes are a type of steel pipe designed to meet the specifications outlined by the American Petroleum Institute (API).  API 5L X56 pipes are known for their excellent mechanical properties, including strength, durability, and resistance to corrosion, which make them ideal for use in pipelines that require reliable performance under extreme conditions. The “X56” designation refers to the yield strength of the pipe, which is 56,000 psi (pounds per square inch). This grade of pipe is stronger than lower-grade pipes such as API 5L X42 or X46, making it suitable for applications where higher strength is needed to withstand the pressures of modern pipeline systems. The API 5L X56 pipes can be used in both onshore and offshore pipeline systems, as well as in transportation of fluids at varying temperatures and pressures.

Manufactured using high-quality carbon steel, API 5L X56 pipes offer exceptional weldability, making them suitable for a variety of installation techniques. The pipes can be fabricated in different sizes, wall thicknesses, and lengths to meet specific project requirements. These pipes are often coated with anti-corrosive materials to provide additional protection in harsh environmental conditions.

In addition to their mechanical properties, API 5L X56 pipe meet stringent quality control standards to ensure safety and reliability in critical pipeline systems. Whether used in the oil, gas, or petrochemical industries, API 5L X56 pipes play a vital role in ensuring the efficient and secure transport of essential materials.

API 5L X56 Pipe Dimensions

NPS (inches)OD (inches)Wall Thickness (inches)Weight per foot (lbs)Manufacturing Process
1/20.8400.1090.85Seamless, ERW
3/41.0500.1131.13Seamless, ERW
11.3150.1331.68Seamless, ERW
1 1/41.6600.1402.27Seamless
1 1/21.9000.1452.72Seamless
22.3750.1543.65Seamless, ERW
2 1/22.8750.2035.79Seamless
33.5000.2167.58Seamless
44.5000.23710.79Seamless, ERW
66.6250.28018.99Seamless, ERW
88.6250.32228.55Seamless, ERW
1010.7500.36540.48Seamless, ERW
1212.7500.40653.52Seamless
1616.0000.50084.36Seamless, ERW, LSAW, SSAW
1818.0000.562107.36LSAW, SSAW
2020.0000.593127.95Seamless, ERW, LSAW, SSAW
2424.0000.688179.46Seamless, LSAW, SSAW
3030.0000.875291.76LSAW, SSAW
3636.0001.000436.91LSAW, SSAW
4242.0001.188594.18LSAW, SSAW
4848.0001.250754.82Seamless, LSAW, SSAW
6060.0001.5001224.60LSAW, SSAW
7272.0001.6251648.80LSAW, SSAW
100100.0002.0003270.00LSAW, SSAW

Notes:

  1. OD (Outside Diameter): Measured across the outer edge of the pipe.
  2. Wall Thickness: Standard thickness values suitable for X56 grade.
  3. Weight per foot: Approximate values calculated based on a steel density of 490 lbs/ft³.
  4. Manufacturing Processes:
    • Seamless: High-pressure applications.
    • ERW (Electric Resistance Welded): Medium-pressure pipelines.
    • LSAW (Longitudinal Submerged Arc Welded): Large diameter, heavy-duty pipelines.
    • SSAW (Spiral Submerged Arc Welded): Ideal for large diameters and long-distance pipelines.

X56 Chemical Composition

ElementMaximum %
Carbon (C)0.26
Manganese (Mn)1.40
Phosphorus (P)0.030
Sulfur (S)0.030
Silicon (Si)0.45
Nickel (Ni)0.40
Chromium (Cr)0.40
Copper (Cu)0.50
Molybdenum (Mo)0.10
Vanadium (V)0.10

API 5L X56 Mechanical Properties

PropertyAPI 5L Grade BAPI 5L X56
Yield Strength≥ 245 MPa (35,500 psi)≥ 386 MPa (56,000 psi)
Tensile Strength≥ 415 MPa (60,200 psi)≥ 490 MPa (71,100 psi)
Elongation≥ 23%≥ 22%
Hardness (max.)72 HRB74 HRB
Impact Test (J)Minimum average of 27 JMinimum average of 42 J

Conclusion

API 5L Grade B X56 is a robust and reliable steel pipe that meets the rigorous demands of the oil and gas industry. Its blend of strength, durability, and compliance with international standards makes it well-suited for pipeline construction and other critical applications.

 

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