Definition of the straight sections before and after the throttling device – is the presence of weld seams allowed?
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When installing Ainiuba, it is required that there be 12D at the front and 4D at the back, with the pipe segment lengths meeting the specified requirements; however, is it allowed to have weld seams in the 12D section of the upstream pipe segment? It would be best to have relevant literature available, as GBT-2624 doesn’t seem to specify this very clearly. It just says that obstacles are not allowed. Welcome, great deity! ! !
Except that the flanges for mounting instruments need to be welded, no weld seams are allowed in the straight pipe sections. This is something observed in practice: whenever the pipes before and after the flow meter have been modified or replaced multiple times, the design requires that the entire straight pipe section be replaced as well.
Then, should the inside of the joint where the flange is welded to the pipe be ground?
Generally, during design, no components that could cause \"disturbance\" are allowed to be present before or after the throttling device. It is generally required that the entire unit, including the throttling device and the straight pipe section, be supplied by the manufacturer.
It’s too extravagant; it depends on the welder’s skill
It’s best to use a pipe; with Anubaa, large pipes are generally used, so welding pipes should not be a problem.
It is best to use a single pipe; typically, the manufacturer supplies the entire assembly, including the throttle device and the straight pipe section. Anemometer flow meters are generally used for large pipes, and their accuracy is not high, so it is also acceptable to use welded pipes, as this will not have much impact on the measurement results.