For many years, the industrial gas industry has produced a wide range of gas mixtures. All gas mixing operations require the normal safety procedures, practices, and controls which are followed when filling standard industrial gases. Additional controls are required when mixing potentially incompatible gases. There have been several serious incidents during the manufacture of mixtures containing flammable plus oxidant gases, some of which have resulted in fatalities. For this reason, great care is necessary during the preparation of such mixtures to ensure that no uncontrolled reactions take place.
Regulations and procedures for gas mixing vary in some details from one manufacturer to another, however, they should always be based on the same safety principles.
It is not the intention that this standard be a manual on how to manufacture compressed gas mixtures, its sole aim is to set out the basic requirements to ensure that gas mixtures are manufactured safely.