Economic growth has caused increase of consumption of technical gases — oxygen, argon, nitrogen, and various gas mixtures which in turn determined the necessity of reconstruction of a gas filling plant at the Urals works of technical gases (Yekaterinburg, Russia). The aim was to make gas filling more efficient and safe and to improve the quality of cylinder gases. During modernization the number of loading platforms was increased from 2 to 14, new equipment was installed including cryogenic tanks and pumps, filling racks, forklifts, hydraulic trolleys etc. Herein the analysis of problems is given which Uraltechgaz engineers faced at different reconstruction stages such as design of facilities, choice of equipment, construction and assembling.