Gas inspections, controls and tests in industry. Inspections, inspections and tests of gas appliances. Inspections of gas equipment. Inspections and tests in industry: - heating gas distribution - industrial gas pipelines - gas control stations - gas pressure reduction - industrial gas appliances - industrial gas furnaces - gas consumption by combustion Training and testing of gas plant operators in industry. Periodic inspection of gas operators. Periodic inspections of gas equipment in industry. Tests and revisions of heating and technical gases in industry.