The Physics of a Spark: Flammability Limits, Ignition Energy, Gas Groups and Temperature Classes

Deep End Era. Engineering with Sankalp · Oct 28, 2026 · 1h 6m

A new hydrogen-blending skid is coming to Al Sahil. Every electrical item in the area was bought for natural gas, group IIA, T3. Elena Petrova has to explain to a project manager why one molecule changes everything, and Rashid Al Mansoori takes her into the laboratory history behind the letters and numbers stamped on every Ex nameplate: flames squeezed through gaps, sparks of measured energy, and hot surfaces that light a vapour without any flame at all.

Chapters

00:00:00 Cold Open: One Molecule Changes Everything

00:05:17 Fuel, Air, and a Window of Proportion

00:11:32 A Spark of Measured…