Reference tools

Gas charts, tables & calculators

Free reference tools for anyone working with industrial gases — built on published standards and physical constants, with every source stated.

Gas unit converter
Convert Nm³, kg, SCF, pounds and litres for any industrial gas — plus the density tables the conversion depends on.
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Cylinder colour code chart
Ground colours and neck bands to IS 4379, with the oxygen-vs-CO₂ black cylinder trap explained.
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Gas properties table
Molecular weight, density, boiling and critical points, vapour density and flammable limits for every common industrial gas.
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