API 5L Grade B ERW steel pipe is a common grade pipe for oil and gas pipeline transmissions. It also called L245 Pipe refer ISO 3183, named by minimum yield strength 245 Mpa (355,000 Psi). Equivalent material ASTM A53 B, which have similar value on chemical composition, mechanical properties, and applications.
API 5L GR.B ERW steel pipe covers PSL1, PSL2, Sour Services, for onshore and offshore pipelines. Manufacturing types including ERW, EFW, HFW.
PSL1 is normal line pipe standard, PSL2 is a higher specifically level pipe, has more strict value on chemical and mechanical strength. More over PSL2 requires more test methods like None Destructive Test, CVN Impact Test, DWT etc.
API 5L B PSL2 expressed with API 5L BN/Q/R/M
Sour Services: For sour pipelines like H2S environment, pipe material have typical restrictions on chemicals element of Carbon, P and S. Referring standard NACE MR0175.
API 5L GR.B ERW steel Pipe for Sour Service expressed in API 5L BNS/QS/MS
Steelmaking in Converter → Refine → Continuous Casting → Hot Rolling → Uncoiling → Accumulator → Cross Welding → Strip End Shear → Strip Leveling → Edge Milling →Strip UT → Forming → Electric Resistance Welding → Sizing → Air Cooling+ Water Cooling → Online Weld Seam Heat Treatment → Online Weld SEAM UT → Bevelling → Hydrostatic Testing → Weld Seam UT → Pipe UT → Appearance and Dimension Check → Coating → Marking → Length-measuring and weighing → Packing → Transoprtation