Are all gate valves connected by flanges?
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Dear sea friends, are all gate valves connected via flanges?
Of course not~~ Gate valves are a type of valve whose internal structure typically includes a gate element that serves to shut off flow. There is no inherent connection between flange connections and gate valves; you can think of flange connections as just one method of joining components. Since flange connections are merely one way of connecting, there are also gate valves that use methods such as butt welding or socket welding for connection. Valves like butterfly valves and check valves also come in wafer-type versions, and plastic valves can be joined using adhesive methods
No, it is recommended that the original poster take a look at the valve standards
It has something to do with the size of your valve; generally, smaller valves are connected using threads. One of the inch-sized gate valves in our factory is connected this way, while larger valves require flange connections.
It depends on the requirements of your process and its specific characteristics. Valves in oxygen pipelines and main lines need to be connected using flanges, while valves in less important pipelines, such as bypasses, are welded directly. The same applies to small-diameter pipelines
The large-diameter, low-pressure versions are flanged, while some of the high-pressure, forged steel versions have threaded connections
Definitely not; there are also socket weld and butt weld types.
All I’ve seen are flange connections
The connection methods for gate valves generally include flange connection, welding, and threaded connection
There are many ways to connect valves. As mentioned by the user above, the connection between a valve and a pipe is primarily determined by the requirements of the production process, such as the medium flowing in the pipe and the pressure.
Of course not; usually, socket valves are used for those below DN40, while flange valves are used for larger ones. Z41 refers to flanged gate valves, while Z61 refers to socket gate valves.