Flanged valves, splices, cylinders, elbows
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Is there a specified relative position for the bolt holes on the flanges at both ends? For some enamel pipes, it’s not feasible to require a swaged flange at one end every time spare parts are purchased, right? I need experts’ advice! ! !
Under normal circumstances, when installing flanges, the bolt holes should be arranged at intervals; as long as this principle is followed, isn’t it unnecessary to use slip-on flanges?
The bolt holes on the flange diagram in the flange standards should be in the normal installation orientation.
The specific location isn’t specified, right? It can be requested when placing the order.
It depends on the situation. The loop flange is relatively more convenient and easier to use in construction; their functions are the same. Any other type can also be used as long as the span is appropriate. It’s mainly the handle that matters here
Check the relevant standards; there are requirements.
No relevant standards have been found yet. During the last construction, a gate valve was installed on the pipeline; the welder assumed that the openings in the flanges on both ends were vertically aligned. It turned out, however, that there was a misalignment between the flanges on the two ends of the valve, so another valve had to be obtained from the warehouse before it could be installed.
There are standards for this; the hole spacing on the flange is one of its key characteristics, as otherwise the bolts cannot be fitted. Therefore, when purchasing a flange, it is essential to determine the nominal diameter and nominal pressure. For example, for a DN32 flange, the value is 90 for 6 kilograms of pressure, and 100 for 10 kilograms of pressure