The issue of mismatch between pipes and fittings in chemical industry standards
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HG20553 specifies the pipe wall thickness. When looking for corresponding industry standards for pipe fittings, it was found that there are no relevant standards for welded pipe fittings (HG21635 has been revoked). I would like to ask which standard should be used for welded pipe fittings?
We require that the wall thickness of the fittings be the same as that of the pipes; we don’t follow the values specified in the fitting standards, as that appendix only suggests them for reference, and the version from which it was taken is outdated.
Yes, but when using 3D software for modeling, it will ask you to choose which logo to use, and that’s when things get awkward
If that’s not possible, indicate in certain parts of the drawings that bevels should be created during welding alignment, in order to reduce misalignment caused by differences in thickness. .
For better 3D software like PDMS, the component libraries require further development and regular maintenance; in other words, the information related to pipes and fittings can be customized. There are also some less sophisticated 3D software programs, or even pirated versions, that allow use only of the built-in component libraries, in which case alternative solutions must be found, such as making changes after the materials have been prepared...
It’s back to the default setting; last time it had to be changed manually. . . I’m crying from exhaustion.
Well, if you think back, in the past most work involved manual drawing of piping and axonometric views, manual calculation of the materials needed for each pipe, and then summing up those values to determine the total material requirements... Many small and medium-sized design firms don’t have the means to invest heavily in software; they rely on the hard work of their designers and their creative thinking. Either they have to persuade their companies to spend money on updating the software, or they have to write their own applications based on existing software. If neither of these options is possible, then there’s only the option of using manual methods...;P
It’s possible in most cases, but keep in mind that some pipes require rigorous radiographic testing, and beveling can affect the quality of the radiographs.
:Lol, failing to address the notch is detrimental to RT. . .
The wall thickness can be determined through calculation or by selecting from a series of values; once confirmed, it’s ready to be submitted.
The wall thickness of fittings is generally the same as that of the pipes. By specifying the wall thickness of the pipes, it is possible to determine both the specifications and the wall thickness of the fittings. Of course, in special situations it may be necessary to increase the wall thickness of the fittings, such as in high-temperature and high-pressure environments; this is done to ensure that the fittings can withstand the corresponding pressures. Another situation where this is necessary is when X-ray inspections of the welding areas are required. In such cases, it is important that the wall thickness of the fittings remain consistent with that of the pipes, so as to avoid defects such as burrs or issues that could result in substandard X-ray images