Why is a valve installed at the connection between the pipe and the flexible metal hose?
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Clause 10.3.1 of the piping requirements for the dock loading/unloading area in the \"Technical Requirements for Liquid Loading and Unloading Arms\" standard HG/T21608-2012 stipulates that a valve shall be installed at the connection between the pipeline and the flexible metal hose. I’m not quite sure about this – what is the purpose of installing valves? Do both ends of the hose need valves? I would appreciate some advice from those who are more experienced.
It facilitates the easy replacement of the metal hose, and its lifespan is certainly not as long as that of metal pipes.
The hose is the weak link in the pipeline; it wears out and breaks easily, and the presence of valves facilitates emptying and replacing the hose. In practice, valves are usually available near the dock hoses, but it is not necessary to have ones at both ends; one valve at one end is sufficient, allowing the other end to be emptied before the hose can be removed.
This post was last edited by Mint Life on 2015-7-15 08:15. Valves are installed between pipes and flexible hoses to facilitate the replacement of the flexible hoses and prevent the medium flowing inside the pipes from leaking out. If you need stainless steel flexible hoses, PTFE hoses, bellows, PTFE compensators and expansion joints, as well as PTFE-lined pipe fittings and corrosion-resistant pipes, please contact me*******