API 5L Grade B steel pipe is a common grade pipe for oil and gas pipeline transportation. It is also known as L245 pipe, referenced to ISO 3183, named after a minimum yield strength of 245 Mpa (355,000 Psi).
Equivalent material ASTM A106 B or ASTM A53 B with similar value in chemical composition, mechanical properties and application.
API 5L B covers PSL1, PSL2, sour service for onshore and offshore pipelines. Fabrication types include seamless and welded.
PSL1, PSL2 and Acidic Media Types.
Usually PSL1 is used, which is equivalent to ASTM A106 B and A53 B.
PSL2 is a higher specification grade pipe with stricter requirements for chemical and mechanical strength. PSL2 requires more test methods such as non-destructive testing, CVN impact testing, DWT, etc.
API 5L B PSL2 is represented by API 5L BN/Q/R/M.
Acidic medium: For acid pipelines such as H2S environment, the pipeline material has typical requirements for chemical elements such as carbon, phosphorus and sulfur. Reference standard NACE MR0175.
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