Excuse me, what do the markings on the foreigner’s drawings – 2500mm@ HLL and 300mm@ LLL – mean?
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It is related to the labeling of pressure vessels; thank you for letting me know
As I understand it, HLL: High Liquid Level refers to a high liquid level at 2500 mm； LLL: Low Liquid Level – the low liquid level is at 300 mm.
Thank you. I couldn’t find it even on Baidu; it’s clear that the experts are here. Thank you so much
The answer from upstairs should be correct; there is such a marking on the equipment diagram for this project as well, and the process engineering team explained it in the same way
What do BTL TTL mean? T stands for upper, and B stands for lower. Is T related to welding in some way? Please explain, experts
Reply 5# pyramid88 BTL: Below Tangent line – tangent of the lower head； TTL: Tangent line to the upper head on the Top Tangent line ；
Thank you for sharing; I was just working on this kind of HLL, LLL, and now I understand it.