Is it possible to drill an unthreaded hole in a pressure device?
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Is it possible to drill a hole with a diameter of 20 mm and a depth of 40 mm from the outside of a pressure vessel operating under a pressure of 0–4.1 Mpa, made of 15CrMo material with a wall thickness of 85 mm? Please ask the experts to help answer
It must absolutely not be allowed! ! Why open a hole?
It doesn’t penetrate completely; it only makes the surface a bit thinner, in order to install a certain type of instrument
Recalculate the strength, but generally that’s not possible.
That won’t work either; during manufacturing, any slight dents in the steel plates must be welded out and then smoothed out. The instrument port can be connected to other spare ports. If there is no spare port and it is absolutely necessary to install this instrument, then find another vent port, drain port, or other non-process-related port. In short, drilling like this on the equipment is absolutely not allowed. Unless the original design unit gives you written approval.
No, but an installation bracket can be welded to the device.
It is necessary to obtain the consent of the design firm
The poster is referring to CrMo steel pressure vessels; welding them again requires re-heat treatment.
Why am I the best assistant? If the setting is incorrect, I can cancel it. :handshake
On multi-layer containers, leakage indicator holes must be provided in all layers except the inner cylinder; however, this is not allowed for single-layer containers, as drilling can hardly ensure quality and problems are likely to arise.
This is not allowed; it can easily lead to safety accidents