The issue of arranging steam pipes at different temperatures and pressures adjacent to each other
Thread Content
One DN100, designed for a temperature of 260 degrees and a pressure of 1.2 MPa； A pipe with a design pressure of 3.0 MPa, a design temperature of 450°C, a flow rate of 10 t/h, and a diameter of DN150 ； A pipe with a design pressure of 1.0 MPa, a design temperature of 180°C, a flow rate of 30 t/h, and a diameter of DN300 ； When three pipes are arranged adjacent to each other, it is easier to make compensations; what is the order of arrangement?
It is recommended to place those with high pressure and high temperature on the outside, arranging them in order of increasing pressure and temperature; those with low pressure and low temperature should be placed on the inside, as this helps to minimize deformation. For reference.
There is another issue now: the intermediate pressure and temperature values are already predetermined for the DN100 pipeline mentioned above. Now, we want to make modifications to increase the temperature and pressure to levels that are higher or lower than those originally specified； In that case, won’t it be difficult to construct on both sides of the newly added pipe layout? How should it be arranged?
For the sake of ease of construction, the larger pipes are placed on the outside while the smaller pipes are placed on the inside. For steam pipelines, what’s crucial is the proper installation of supports and expansion bends; the amount of slippage should not be too great
In accordance with the principle of pipeline arrangement in the duct: large-diameter pipes are located on the outside (edge), while small-diameter pipes are on the inside. Main considerations: stress on the pipe rack, ease of construction, etc. As for pressure and temperature, they are not major considerations. As long as there is space around the DN100 pipe, arrange it in this way.
Be eager to help others; more participation is welcome ----------------------------------------------- The layout of hot pipelines is a comprehensive and thorough process that requires taking into account the expansion properties of the pipes
Are you saying that the expansion amount calculated through stress analysis is necessary in order to finally determine the pipeline layout sequence?
I’m not sure exactly; it seems like a preliminary arrangement is made first, and then calculations are done
Place the compensators in the locations where greater compensation is needed. As you suggested, it’s fine to arrange them according to the pipe diameter – DN300, DN150, DN100. Although the temperature is high, the smaller pipe diameters mean that the compensators required can also be of smaller size