I would like to ask everyone for advice regarding the material of oxygen pipelines
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What are the differences between UNS N0550, UNS N0440, and Monel K500? Why are these materials chosen for certain oxygen pipelines and valves?
Due to the cold brittleness of steel below –40°C
I don’t know if you work in design or on-site operations. There are strict regulations regarding the flow rate of oxygen in pipelines. There seems to be a standard regarding the construction of oxygen stations. It specifies the maximum flow rates for pipes made of carbon steel, stainless steel, and copper at different pressures.
Talking about oxygen valves – what about nickel-based alloys? Stainless steel pipes will do; the high-pressure limit is 4.5
Oxygen pipelines require oil-free conditions; it’s sufficient to follow the recommended flow rate settings!
Ugh, what are all those answers from above? UNS N0550 is MONEL 500, UNS N0440 is MONEL 400, Monel K500 ； In general oxygen environments, oil removal and degreasing are required, and a globe valve is the best choice! Quick-open and quick-close valves should not be used in oxygen pipelines, and the flow path must also be smooth to prevent sparks from occurring and causing accidents. Also, it’s because the above materials are soft! There are technical requirements for oxygen pipelines in many places; it’s hard to explain them all at once. It is best to refer to the technical specifications!