Layout of low-pressure steam pipes in the plant area!
Thread Content
Class A workshops in the factory complex require low-pressure steam; I’m seeking advice from experts – what are the design specifications for low-pressure steam? Pipes of DN25 will be used for the pipeline system; the operating temperature is 100°C and the inlet pressure is 1.2 Mpa. Connected to the plant area via the park’s steam pipeline. Can pipes be placed underground through roads? Is it feasible to create a trench, fill it with concrete, and cover it with iron fencing to cross a 4m-wide secondary road?
It doesn’t seem to work; try searching for it – there are standards related to chemical plant design
The DN25 pipes shouldn’t be too strict, right? Use a sleeve for passage to provide insulation
It’s certainly possible to use buried pipes; after all, the width is only 4 meters. Install access points at both ends for maintenance, ensure proper insulation in the buried area, as well as resistance to pressure and corrosion, and add a drainage system at the end. In the low-pressure range, it seems that pipes below DN50 are not subject to inspection; I’m not quite sure about this, so you’ll need to check it yourself.
No, the section of pipeline buried underground is at a lower level, so it’s not possible to drain the condensate
Steel sleeves can be used for the buried portion, while concrete is still used for the road surface, which does not affect traffic.
So, according to you, steam pipes can’t be buried underground? Wrong!
It is recommended to avoid underground installation as much as possible. Casing, expansion, insulation, hydrophobic wells – it’s so troublesome.
The temperature is more than 100°, right? The saturation temperature of 1.2 MPa steam is 191.6°C. It can be buried underground; use a DN150 pipe as an outer protective tube, and insert the DN25 working pipe along with its insulation layer inside – this constitutes a directly buried steam pipe. When entering and exiting the underground area, the outer protective tube is 0.5 meters above the ground level. The hydrophobic point is connected to the hydrophobic tank; the water pipe extends horizontally from the hydrophobic tank, goes to the ground surface, and then connects to the hydrophobic valve assembly.
It can be done this way; the pipe is very small, and this method of crossing the road is quite common – there’s no need for traffic lights or zebra crossings in such strict form