Can a DN25 pipe be directly drilled and welded with a DN25 drain pipe?
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For DN25 pipes with a pressure rating of PN11.0, when installing drain vents, tees were not used; instead, holes were made and welded directly. Are there any specific regulations regarding this approach? Can the strength requirements be met? Could there be any safety hazards? ?
This post was last edited by *ng*ng916 on 2012-4-17 at 10:28. According to the standards, three-way connectors are required; it depends on what medium is flowing in the pipeline If it’s tap water or something like that, it’s fine; just weld it properly and make do with it
PN11.0 belongs to the category of high-pressure pipelines; their wall thickness is certainly large. Only those with welding qualifications are allowed to work on them. It’s also best to use tees, as otherwise, the release of high-pressure fluids can lead to serious consequences.
If it is during the installation of the device, immediately request the contractor to make changes.
For pressure classes of PN11.0, it is best not to perform welding directly through an opening. Although it is possible to install a drain for drainage, the opening must be made at the center line; coupled with welding deformation, the entire pipe will deform significantly, and the quality of the weld will also be poor.
Hehe, it’s not tap water. I was wondering if the moderator has any standards for this
It’s specified in the standards for the installation and acceptance of chemical pipelines, right?
It’s not allowed to open it directly; this is a high-pressure pipeline and the safety requirements are not met.
It belongs to high-pressure pipelines; the safety standards are not met, so it’s not allowed to make an opening directly! ! !
I think a tee is necessary. I’m not sure what the pressure in your pipeline is; for high pressures, a tee is recommended
According to the latest standards, PN11 corresponds to a pressure of 11 kilograms, which classifies it as a low-pressure pipeline. If the pressure were calculated at 11 MPa, it would be considered a high-pressure pipeline, and in that case, there would be no need for something like a drain line. Normally, if the pipe diameter is too small, direct drilling is not allowed; moreover, using a tee is also inappropriate – instead, a reinforced base and a short circuit should be used. Go to the construction site and take a look; you’ll understand then.