Engineering Tools
Free calculators and tools for OCTG and pipeline engineering. All formulas reference API 5CT, API 5L, and ASME B31.8.
Enter your well or pipeline parameters — grade, PSL level, connection type and coating recommendation generated automatically.
Try the selector →Hydrostatic test pressure and plain-end pipe weight per metre for API 5CT casing and tubing.
Open calculator →Design pressure, minimum wall thickness, and MAOP per ASME B31.8 for API 5L line pipe grades X52 through X80.
Open calculator →Instant conversions for pressure (MPa, bar, psi, ksi), length (inches, mm, ft, m), weight (lb/ft, kg/m), and temperature.
Open converter →Enter H₂S partial pressure, temperature, pH, and chloride — get the NACE MR0175 / ISO 15156-2 SSC region and qualified API 5CT grades with actual service envelopes.
Open selector →Look up wall thickness, weight per metre, inside diameter, and drift diameter for any API 5CT casing or tubing OD × nominal weight combination.
Open size lookup →Guided tool that determines whether PSL2 is required for your service condition and explains the L→X dual-grade naming and delivery condition suffixes (N/Q/M).
Open PSL selector →Filterable casing dimensions, grade properties, hydrostatic test pressures, and engineering notes per API 5CT / ISO 11960.
View spec tables →Seamless and welded line pipe dimensions, grade properties, PSL1 vs PSL2 requirements per API 5L / ISO 3183.
View spec tables →Grade-Specific Calculators
SMYS pre-locked per grade — enter OD and wall for immediate results.