API 5L is a specification developed by the American Petroleum Institute (API) for seamless and welded steel pipes used in pipeline transportation systems in the petroleum and natural gas industries. This specification covers various grades of pipes, including B, X42, X52, X60, X65, and X70. Each grade has specific requirements for chemical composition, mechanical properties, and testing, ensuring that the pipes meet the necessary standards for their intended applications.
API 5L pipes are carbon steel pipes used for oil and gas transmissions. They include pipes manufactured in seamless pipes and welded (ERW, SAW) pipes.
API 5L is the implementation standard of steel pipe for pipeline transportation systems and specification for line pipe.
Key Features and Benefits
API 5L pipes offer several key features and benefits, including high strength, durability, and corrosion resistance. These properties make them ideal for use in harsh environments and long-term applications. Additionally, the strict quality control measures and testing requirements ensure that the pipes meet the necessary standards for safety and performance. This reliability is crucial for maintaining the integrity of pipelines and preventing leaks or failures.
Steel Grade:
BS:1387, EN10217:S185, S235,S235JR, S235 G2H, S275, S275JR, S355JRH, S355J2H, St12, St13, St14, St33, St37, St44, ST52
ASTM A 53: Gr. A, Gr B, Gr C, Gr.D
API 5L: A, B, X42, X46, X52, X56, X60, X65 X70
GB/T9711: L175, L210, L245, L290, L320, L360, L290, L320, L360, L390, L415, L450, L485, L555
GB/T3091, SY/T5037, SY/T 5040,CJ/T 3022:Q195, Q215, Q235, Q275, Q295, Q345, 08F, 08, 08AL, 08F, 10F, 10, HG5, DF08 SPHC, M8
Size:
Outer Diameter: 219.1mm – 4064mm (8″ – 160″)
Wall Thickness: 3.2 mm – 40mm
End: plain or beveled
API 5L Welded Steel Pipe Manufacturing Types
There are 3 welding types: ERW, LSAW and SSAW welding types.
HIC Tested API Hot Finished Seamless (HFS)
API 5L Cold Drawn or Finished Seamless (CDS)
PSL 2 API 5L Electric Resistance Welding (ERW)
API 5L PSL2 High-Frequency Induction Welding (HFIW)
Carbon Steel API 5L Hot Finished Welding (HFW)
API 5L Steel Butt Welded Pipes (BWP)
API 5L CS Electric Fusion Welding (EFW)
CS API 5L Sub-merged Arc Welding (SAW)
API Steel Cold Drawn Electric Resistance Welding (CEW)
API Spec 5L Oxy-Acetylene Welding (OAW)
API Hand-Welding or Manual Arc Welding (MAW)
Applications of API 5L Steel Pipes
Onshore and Offshore Pipelines
API 5L pipes are used in onshore and offshore pipelines for transporting oil, gas, and water. These pipes ensure safe and efficient transportation, maintaining the integrity of the pipeline and preventing leaks or failures. The high-quality materials and manufacturing processes used in API 5L pipes make them suitable for the demanding conditions encountered in onshore and offshore pipeline applications.
Sour Service Applications
Pipes used in environments containing hydrogen sulfide (H2S) must meet additional requirements specified in Annex H of API 5L. These requirements ensure that the pipes are resistant to corrosion and cracking, making them suitable for sour service applications. The high-quality materials and manufacturing processes used in API 5L pipes make them suitable for the demanding conditions encountered in sour service applications.
Offshore Service Applications
Pipes used in offshore environments must meet additional requirements specified in Annex J of API 5L. These requirements ensure that the pipes are durable and can withstand the harsh conditions encountered in offshore environments. The high-quality materials and manufacturing processes used in API 5L pipes make them suitable for the demanding conditions encountered in offshore service applications.