When will oblong holes be made in the ear mounts?
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There are generally two reasons for providing oblong holes in equipment. It is easy to assemble; even with relatively large tolerances, it can still be installed very easily. This allows the device to expand and contract freely as temperatures change, preventing excessive restraining forces caused by thermal expansion and thus ensuring the safety of the device. Most of the time, Article 2 takes precedence. For example, in the case of saddles, the sliding end is a oblong hole; for equipment that operates at high temperatures and has a large distance between saddles, the length of this oblong hole must be greater than that specified in the standards. When manufacturing ASME equipment, owners often request a calculation sheet for the length of the oval holes in the saddle. The calculation formula is very simple: coefficient of linear expansion * distance between the saddles * temperature difference.
However, the specific timing for drilling oblong holes in the ear mounts varies depending on the equipment design and manufacturing processes. Normally, the ear mounts come pre-drilled with oblong holes during production to facilitate installation and use. .
For high-temperature equipment, oblong holes are more suitable. How large should the oblong holes be to calculate the radial thermal expansion?