Issue with thermometer insertion depth
Thread Content
As shown in the diagram, this is the instrument specification sheet: the short tube is 160 mm long, and the insertion depth is 210 mm or 400 mm. How can this be achieved?
It should be 160+210=U; I’m not sure if my understanding is correct
The short pipe length is 160, and the insertion depth is 210. It depends on the diameter of the pipe; the value “U” mentioned above refers to the insertion depth. The design requires that the thermometer be inserted to a depth of 1/2 to 2/3 of the pipe’s length. For a 210mm pipe, the insertion depth should be around 100, while for a 400mm pipe, it should be 400. There’s also a diagram for instrument installation, which should be considered along with these values
The insertion depth refers to the distance from the process connection flange to the top of the sleeve; there should be a legend at the bottom of the blueprint to explain this
The insertion depth refers to the length of the flange stub on the pipe plus the length inside the pipe; in other words, the length within the pipe is 210 – 160 = 50.
The last edit to this post was made by ssln123 on 2020-10-29 at 08:16. For Pipe 100, the depth of its center line is 50; therefore, the insertion depth is 160 + 50 = 210. As for V5, it seems to be a device – with a length of 160 and an insertion depth of 400, so the portion that extends into the device is 240
That’s correct. The height of the boss is the distance from the flange surface to the pipe; adding the insertion depth gives U. Therefore, the length of the component should be 160 + 210 = 370 mm. The second value refers to the insertion depth of the equipment, and this needs to be determined in accordance with the requirements specified in the project standards
You have the concept reversed; the insertion depth refers to the length into the device and pipe, and this parameter is used for calculating the tail wave frequency. An insertion depth of 210 means going 210 mm into the pipe, while 160 represents the length of the flanged stub including the flange itself. Therefore, the total length required for component selection should be 210 + 150 = 370. The height of the gauge head is generally fixed.
The pipe diameter is 100; how can it be inserted to a depth of 370? U refers to the so-called insertion depth, that is, the length below the flange. Flanged fitting 160+ inserted into the pipe interior by 50 (pipe diameter is 100)
U = nozzle length 150 + insertion depth into the inner wall of the pipe.
It seems that these construction drawings were prepared by Sinopec’s design institute, right?