工业气体主要分为大宗气体与特殊气体两大类型。 以气体型态上使用有分液态与气态上使用工业气体两种。

氮气的分离是最早工业气体使用上的开始。

使用分离方式分离空气出气体为大宗气体如氮气、氩、氧气、氢气、等气体。

特殊气体相对大宗气体等不常见之气体

Industrial gases are gaseous materials that are manufactured for use in Industry. The principal gases provided are nitrogen, oxygen, carbon dioxide, argon, hydrogen, helium and acetylene; although a huge variety of gases and mixtures are available in gas cylinders. The industry producing these gases is known as the industrial gases industry, which is seen as also encompassing the supply of equipment and technology to produce and use the gases. Their production is a part of the wider chemical Industry (where industrial gases are often seen as "speciality chemicals").