Tube Trailer Volume · Virtual Pipeline Logistics · Cascade Systems
CNG tube trailer specifications, real gas compressibility, cascade system design per NFPA 52 and DOT 49 CFR Part 178.
CNG tube trailer deliverable volume is calculated from the trailer water (water-volume) capacity, the fill and delivery pressures, and the gas temperature, applying a real-gas compressibility (Z) factor. The calculator returns the deliverable gas volume between fill and delivery pressure at standard conditions per NFPA 52 and DOT transport regulations.
CNG transport tubes must comply with DOT 49 CFR for pressure vessel transport, NFPA 52 for vehicular gaseous fuel systems, and ASME standards for high-pressure vessel design. Maximum transport pressure is typically 3,600 psig.
Gas stored at higher temperatures has lower density, reducing the mass of gas per tube. The calculator applies real-gas compressibility corrections to account for temperature and pressure effects on stored CNG volume.
CNG tube trailers typically operate at storage pressures of 2,400 to 3,600 psig. Higher pressures increase volumetric capacity but require heavier tube walls per DOT specifications.