The main measures taken for the design of oxygen piping in small air separation unit.
1、The piping material of the high-pressure oxygen gas pipeline is made of stainless steel to reduce the possibility of iron oxidation and combustion under intense working conditions.
2、Partial commercial flow rate piping using copper brocade alloy (Monel);
3, the use of different conditions of the pipeline proposed different degreasing and cleanliness requirements in the selection of Tong expansion joint for pipeline expansion compensation, the pipeline towards the design should be fully considered to reduce the radial vibration or displacement during the operation of the pipeline. of small air separation unit. The corresponding filter should be designed before the constant pressure regulating valve to prevent rust and debris from jamming the regulating valve. After the valve should be connected to a section of its length is not shorter than 5 times the diameter of the pipe, and not less than 1.5m of copper-based alloy or stainless steel piping to prevent fire.
4, oxygen pipeline should be set up as little as possible elbow and bifurcation, working pressure greater than 0.1MPa oxygen pipeline elbow, reducer should be made by stamping forming flange. Bifurcation head of the airflow direction should be 45 ° - 60 ° angle with the direction of the main airflow.
5, flange sealing ring should be used purple copper or polytetrafluoroethylene material О-type seal. Oxygen pipeline should be designed to eliminate static devices, grounding resistance, flange resistance are certain requirements.
6、The bifurcation head of oxygen pipeline should be made of rolled products, and it is strictly forbidden to open holes and plug in the field.
Dear air separation production and design of oxygen piping, to ensure the quality of design and installation and the subsequent long cycle of safe operation of small air spearation unit, large air spearation unit and liquid air spearation plant.
