Maintenance of cryogenic air separation equipment

What requirements and regulations should be met for the assembly of meter tube, cold insulation box and strength and air tightness test before positioning of air separation equipment

  In the small air separation unit, when gas or liquid flows through a shrinkage hole or valve in the pipeline, the flow will be hindered, and the fluid will produce vortex collision, friction and other resistance at the shrinkage hole or valve. In order to flow through the shrinkage hole or valve, the resistance must be overcome, showing that there is a pressure difference before and after the shrinkage hole...