LPG Basics-- Specialised course for Refreshers and Freshers in LPG industry Module 1 of 8

A: That's the most common mistake — trusting static suction pressure. LPG near its bubble point needs NPSH margin, not just pressure. Warm liquid flashes locally, giving noise and unstable head without tripping protections.

A: That's the most common mistake — thinking pressure equals inventory. Vapour pressure tracks temperature, not fill alone. External cooling removes heat input, directly reducing boiling without creating secondary hazards.

A: That's the most common mistake — over-specifying exotic alloys. Dry LPG isn't corrosive, and carbon steel works when impact toughness matches minimum metal temperature, keeping cost and fabrication risk down.

A: That's the most common mistake — assuming all leaks look the same. Excess flow devices need a sharp surge to trip; slow leaks bleed inventory quietly and still form flammable clouds.

A: That's the most common mistake — blaming heat duty. Pressure drop ahead of heat transfer drives flashing and auto-refrigeration, so icing stays localised at the restriction.

A: That's the most common mistake — thinking only valves set flow. Lower pressure pushes LPG toward two-phase conditions, so part of the stream flashes and starves the vaporiser of liquid.

A: That's the most common mistake — anchoring to operations. Fire case relief is geometry-driven; wetted area governs heat input and vapour generation regardless of normal throughput.

A: That's the most common mistake — blaming instruments first. Even commercial LPG can carry heavies; they foul mechanical internals and freeze indication while the vessel level changes.

A: That's the most common mistake — focusing on fuel value. The massive volumetric expansion is what bursts piping and vessels if trapped, even without external heat.