Can’t butterfly valves be used in oxygen medium pressure pipelines?
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Medium: oxygen, pressure of about 0.3 MPa, pipe size DN65-100. The design institute said that the regulations for oxygen stations specify that butterfly valves cannot be used, and recommended the use of globe valves; however, no relevant provisions were found after searching. If anyone knows, please explain it
\"Code for Design of Oxygen Stations\" (GB 50030 - 2013) \"11.0.10 The valves on oxygen pipelines shall comply with the following provisions: 1 Gate valves shall not be used on oxygen pipelines with a design pressure greater than 0.1 MPa\"； ”Explanation of the provisions: 11.0.10 In domestic practice, there have been numerous incidents in which, when gate valves were manually opened or closed, the flow rate of oxygen changed suddenly, causing particles such as rust inside the pipes to collide and rub against each other, generating energy that led to ignition or explosion. To prevent such accidents, gate valves must not be used on oxygen pipelines with a pressure greater than 0.1 MPa. Although there is no rule prohibiting the use of butterfly valves, it is reasonable for the design institute to recommend the use of globe valves.
Thank you for the reply. A globe valve is certainly better, but it has higher resistance and a higher price……
I agree with the view on the second floor; both butterfly valves and gate valves are fast-opening valves, which can cause an instantaneous increase in oxygen flow rate and velocity, posing a risk to safe operation. Therefore, it is reasonable to use globe valves.