Is it safe to weld the corresponding joints of air ducts under pressure and make openings under pressure? Is a relevant qualification required for this task?
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Compressed air pipelines are used to test the flow rate and pressure of fluids within the pipes; accordingly, the joints are welded under pressure, and holes are made under pressure as well (0.5MPa–0.8MPa). Is this safe? Is a relevant qualification required for this task?
No, check the specifications. Compressed air pipelines are oxygen-rich pipelines, and opening them under pressure is dangerous.
The specifications do not allow the use of compressed air pipelines for pressurized hole opening. It will explode and catch fire.
That’s not possible; there’s water in the pipes here, and work under pressure is not allowed when the pressure exceeds 0.1 MPa