Can the pipe openings be added later during the fabrication of a tank at 5.0 Mpa?
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The layout plan for a batch of 5.0 MPa storage tanks has not been finalized yet, and the position of the pipe connections cannot be determined at present. Is it possible to construct the tank body first and then add the openings? What impacts might this have?
It should be possible, but the design and manufacturing need to be completed by the time it’s finished...
Sure, that’s possible. But after the cylinder is made, making holes in it is a bit more complicated than making holes directly in the sheet metal
If the manhole isn’t opened, it will be difficult to ensure quality when performing the final weld, which requires single-sided welding with double-sided formation
Generally, the head is cut first; there is a certain lead time for outsourcing tasks, and after that the cylinder body is cut. If both are cut at the same time, the outsourcing party needs to indicate the diameter deviation. It’s fine to have the opening at the back of the tube
The cylinder can be made first and then holes can be drilled. Note: 1. For equipment hours, it is recommended to use a full plate for the cylinder. When the equipment is large, pay attention to the location of the circumferential seam to prevent the fittings from being installed on it. 2. The end ring seam should be tack-welded with TIG welding, using single-sided welding. This ensures welding quality.
It can be issued by the manufacturing unit or a qualified entity
The key is the positioning of the longitudinal and circumferential welds; openings should be avoided in areas with longitudinal welds, and circumferential welds should also be avoided as much as possible. It’s necessary to communicate with the inspection team and the owner in advance!
If there aren’t many pipe outlets, it’s not a big problem; there is usually a lag time in terms of the position of those outlets, and we also…
It’s not a big problem; it’s more or less the same