Question about the length of valves shown in the piping diagram
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This post was last edited by Wang Tianze on 2016-7-7 21:45. 1. For metal valves connected via flanges during piping work, the length of the valve indicated in the piping diagram is based on the structural length of the valve. Does this length include the length of the flanges (I’m referring to the two vertical flanges on the outside of the valve), or should the thickness of these flanges be determined according to relevant flange standards? 2. When checking the structural length of the valve, the grade is 1.6, but how should one choose between short, long, or standard structural length? 3. When installing pipe supports, are they set with fixed supports at both ends and a guide support in between? There are so many styles of brackets – is it up to the user to choose? It seems that for those mounted on columns, one can either opt for a single cantilever design or a triangular one What is the difference between hangers, brackets, supports, and other types of frames?
2. You can choose either one depending on the actual situation; there is no strict rule regarding this
Please explain the solution in detail: 1. Not included； 2. Conventional structure ； 3. The middle section is not necessarily entirely composed of guide frames; rather, it consists more often of sliding frames, with the choice depending on the specific circumstances. For conventional pipelines that meet the required span requirements, there is little difference between guide and sliding mechanisms. However, in the case of high-temperature and high-pressure pipelines, it is necessary to determine the appropriate design through pipeline stress analysis ； Generally, one chooses based on the specific circumstances; reference can be made to standard catalogs such as HG/T 21629 compiled by Chengda