Professional Engineering Tool with Compressibility Factor Analysis
Formula: V = π/4 × D² × L
Standard cylindrical volume per GPSA Section 17.
• Liquid inventory & batch tracking
• Hydrostatic test water requirements
• Drainage, purging & inerting volumes
• Pig launcher/receiver sizing
• Use actual ID (not nominal pipe size)
• Water density: 62.37 lb/ft³ @ 60°F
• Pig displacement: 95-98% of pipe vol
• Hydrotest: Add 3%/1000 psi compression
• Gas: Sutton + DAK correlations (±1-2%)
• Custody transfer: Use AGA-8 Detail
Understand pipe volume principles, calculations, and industry applications
Internal (line-fill) volume of Schedule 40 pipe per 100 feet, from V = π/4 · ID² · L with 7.48052 gal/ft³ (1 bbl = 42 US gal). Scale linearly for other lengths; use the calculator above for other schedules and gas line pack.
| NPS (Sch 40) | ID (in) | Gallons / 100 ft | Barrels / 100 ft |
|---|---|---|---|
| 1" | 1.049 | 4.5 | 0.11 |
| 2" | 2.067 | 17.4 | 0.42 |
| 4" | 4.026 | 66.1 | 1.57 |
| 6" | 6.065 | 150.1 | 3.57 |
| 8" | 7.981 | 259.9 | 6.19 |
| 12" | 11.938 | 581.5 | 13.84 |
| 24" | 22.624 | 2,088.3 | 49.72 |
This calculator determines internal pipe volume and gas line pack capacity. It computes the total volume of fluid contained within a pipeline segment based on internal diameter and length, using the Dranchuk-Abou-Kassem (DAK) correlation.
Line pack is the total inventory of gas stored within a pipeline at operating conditions. It depends on pipe volume, operating pressure, temperature, and gas compressibility factor. Line pack is critical for managing supply-demand imbalances.
Internal pipe volume is calculated as V = π/4 × ID² × L, where ID is the internal diameter and L is the pipe length. The calculator converts between various units and accounts for pipe schedule dimensions per ASME B36.10M.
For Schedule 40 pipe: about 4.5 gallons per 100 ft for 1-inch, 66 gallons for 4-inch, 150 gallons for 6-inch, and 582 gallons for 12-inch. The pipe volume chart above lists gallons and barrels per 100 ft by nominal size.