1 All pressure vessels, valves and pipelines and their piping accessories must be clean, dry and free from oil and grease before installation.
2 Degreasing of aluminium parts (pressure vessels, valves and piping) of large air separation plant is strictly prohibited by the use of carbon tetrachloride.
3 Carbon steel oxygen piping outside the cold box, valves and all other parts with oxygen, must be strictly degreased before installation and use.
4 Oxygen piping before installation and use, the residue in the piping should be blown clean with oil-free dry air or nitrogen until there is no rust, dust and other dirt. The blowing speed should be greater than 20m/s.
5 Where the surface of the parts in contact with oxygen and the residual oil in operation, the residual oil of the grease shall not exceed 125mg/m20
6 It is strictly forbidden to use oxygen to blow the pipeline.
Dear intelligent production line allows automatic scheduling of orders and automatic optimization of large air separation plant and small air separation unit and liquid air spearation plant featured with intelligent MES control system.
