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Located in the south, it has no freezing period. Can the DN80 carbon steel buried wastewater pipes laid in the plant’s green areas (lawns) be buried at a shallow depth? For example, a burial depth of 200-300 mm? Due to wear and corrosion, it is easier to replace them at shallower depths.
In the future, sewage pipes will no longer be allowed to be buried, and carbon steel pipes are also unsuitable.
Is there a basis for it? Have standards/specifications been implemented? Please ask
I’m not exactly sure about the details; you can search online or take into account the suggestions from above
In our area, the environmental protection authorities stipulated clearly three years ago that \"factory wastewater must be conveyed through open pipes to wastewater pretreatment facilities, and the water output from those facilities must be sent through open pipes into the park’s sewage network.\" It is unclear whether similar regulations exist in other regions, but given the reported cases of soil contamination underground and the increasingly strict environmental protection requirements, exposing sewage pipes is the correct approach and direction. Our company’s standard specifies that thick-walled high-density polyethylene pipes should be used for underground sewage pipes, while carbon steel pipes can be used for those above ground.
You can take a look at GB50316; it contains information on buried pipelines!