Problems with hose connectors at public stations
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As the title suggests, the pipe connections provided at the on-site utility stations are all of DN25 size. Is it necessary to change them to DN20 in order to meet the connection requirements of the hoses?
The diameter change after the valve – is money more important, or safety?
Not even a hose – it can be modified easily; when opening the valve, just control it more gently
The main question is whether there are hoses that facilitate connection to DN25
It depends on the size of the drainage nozzles specified in your system; if they are DN20, it is recommended to replace them all with DN20 nozzles, as otherwise it will be very troublesome later on. Try to be consistent with the system! ! !
Normally, the drain pipes should be no smaller than DN20; according to what you say, it’s difficult to meet this requirement.
For those with a discharge capacity of ≤25, DN15 is acceptable. The DN20 hose station is quite common. It is best to make modifications to achieve the lowest overall cost.
Hehe, which regulation states that the diameter of the drain pipes should generally be no less than DN20? Here, all our drain pipes are DN20, so it’s easy to standardize things by using DN20 hoses
For the public station section, we usually see hoses of DN25; those with variable diameters are not common.
The relevant pipeline layout regulations also require that the drain pipes be DN25, unless the main pipe is very small.
No changes are needed; there are many rubber hoses available for connecting to DN25 drain lines. The black rubber hoses, which are resistant to high temperatures and pressure, are designed according to the specifications of iron pipes