What should the construction team do to drill a hole in the tower on site?
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I would like to ask the experts: there is a tower on site, and the manufacturer forgot to provide an access port; the construction team on site created one. The operating pressure of this tower isn’t very high, but the required corrosion allowance is substantial. A hydrostatic test cannot be carried out on site, and the tower itself also needs heat treatment. So what tests are necessary? Is 100% radiographic testing sufficient?
The method suggested by the SDZBTG moderator is great.
It seems that pressure vessels can’t be drilled as per convenience; one has to file a report with the labor department first, which is indeed quite troublesome. The manufacturer made a serious mistake
Could a manufacturing plant be that careless? I find it a bit hard to believe
Hehe, one of our company’s cryogenic high-pressure equipment had its sealing done incorrectly by the manufacturer; there was no other choice but to re-seal it. The sealing area is checked regularly, and the equipment has been in use for 7 or 8 years now.
If it is a pressure vessel, it is not possible to make holes in it casually; the manufacturer must provide a certificate, and this requires certification and registration by agencies such as the Special Equipment Inspection Institute, among others. This is still in the process of being done
Equipment that has undergone heat treatment must not be handled casually.
First, register with the special inspection agency, and then conduct 100% flaw detection on the welds. As for heat treatment, some method of local heat treatment must be found to address the issue. But as the original poster said, the quality of such manufacturing companies is really poor – they can even make mistakes with something as important as pipe fittings