May low-pressure steam pipes be laid underground? What measures are needed for underground passage construction? ?

Hot water can barely be buried underground; low-pressure steam is not suitable.

It can be buried underground; pay attention to waterproofing and moisture prevention, and fill sand in areas that require thermal compensation. Used in areas with drought and little rainfall.

Thermal stress problems are hard to solve, right?

There’s no problem with burying it underground~1. Pay attention to thermal expansion compensation. 2. Install vent holes at the points where the pipeline enters and exits the ground. 3. Apply heavy-duty anti-corrosion coating to buried pipelines. 4. Before applying the anti-corrosion coating, inspect all welds for defects. 5. When burying the pipeline, pay attention to the thickness, depth, and spacing of the sand

It can be buried; refer to CJJT 104-2014, Technical Specifications for Direct-Buried Steam Pipes in Urban Heating Systems.

Low-pressure steam pipelines are often buried, for example, along the sides of scenic roads, beneath roads, and past factory gates. Steel-in-steel directly buried pipelines are generally used.

It is also widely used in the southern regions; proper external corrosion protection is sufficient.

This post was last edited by “Life Played a Joke” on April 12, 2017, at 14:45. There’s no problem with burying steam pipes; it poses no issues regardless of whether the steam is low-, medium-, or high-pressure. We handle the installation of buried steam pipes daily. Nowadays, urban planning regulations are very strict; overhead piping doesn’t look good, so all pipes are buried underground. To elaborate on this in detail would require more information; let’s cover a few key points briefly: 1. Steam applications are well suited for prefabricated buried pipes with steel sleeves, rather than polyurethane ones. 2. The compensation method mainly relies on bellows compensators ； Where possible, use rotary compensators in suitable locations. 3. Hydrophobicity is intermittent; it can be used to create wells or remain above the surface. 4. The flaw detection for buried pipes is 100%: X-ray testing is used for the inner pipe, while ultrasound testing is used for the outer pipe. 5. The elbows for the entry and exit of buried pipes are specially designed; it is necessary to calculate their size and offset. 6. Pipe sections using bellows compensators require fully enclosed fixing joints, as well as vent pipes. That’s all for now; there are many specific details in the design that cannot be explained in detail here. If you need design services or have any design-related questions, you can add me on QQ or WeChat.