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VDI 2453 Blatt 1:1990-10 (R2016) Gaseous air pollution measurement; determination of nitrogen dioxide concentration; photometric manual standard method (Saltzmann)
VDI/VDE 2254 Blatt 1:1990-09 Precision engineering components; rotating couplings; permanent couplings
VDI 3783 Blatt 2:1990-07 (R2015) Environmental meteorology; dispersion of heavy gas emissions by accidental releases; safety study
VDI/VDE 2252 Blatt 9:1990-06 (R2001) Precision engineering components; guides; spring joints
VDI/VDE 2259:1990-06 (R2001) Precision engineering components; indicating components; scales, symbols, pointers
VDI 2263 Blatt 3:1990-05 (R2003) Dust fires and dust explosions; hazards, assessment, protective measures; pressure-shock-resistant vessels and apparatus; calculation, construction and tests
VDI 2263 Blatt 1:1990-05 (R2003) Dust fires and dust explosions; hazards, assessment, protective measures; test methods for the determination of the safety characteristic of dusts
VDI 2268 Blatt 4:1990-05 (R2017) Chemical analysis of particulate matter; determination of arsenic, antimony and selenium in dust emissions by graphite-furnace atomic absorption spectrometry
VDI/VDE 3685 Blatt 1:1990-05 (R2015) Adaptive controllers; terms and properties
VDI 3793 Blatt 1:1990-03 (R2015) On-site determination of vegetational injuries; method of aerial photography with color infrared film
VDI 2500:1990-04 Fibre-ropes; description, selection, judgment
VDI 3784 Blatt 2:1990-03 (R2004) Environmental meteorology; dispersion modelling for the discharge of flue gas via cooling towers