A leakage for fluid in a pressure vessel to flow through its sealing joint to the atmosphere is just like a leakage for electric charges in a capacitor to flow through its insulator to the ground, and hence there is a sealing law for pressure vessels that is completely similar to Ohm's law, stating the leakage current IL flowing through a sealing joint of pressure vessels is directly proportional to the pressure difference p between its two ends and inversely proportional to its leak resistance RL, or IL = p/RL. Thus it can be known according to the sealing law that the tightness or leak resistance (RL = p/IL = pt/C) is the product of pressure p and time t expended on leaking a unit cubage of fluid through sealing joints under a fixed pressure p and can be gauged according to the sealing theorem RL = p(p – 0.5Δp)Δt/(ΔpC), and the greater the value of p/Δp, the shorter the time required to observe, or the closer to being done at a constant pressure and temperature the test, and the more accurate the test result, where p is the test pressure, Δt is the time expended on the pressure decay from p to (p – Δp), C is the test fluid cubage.
| Published in |
International Journal of Energy and Power Engineering (Volume 5, Issue 4-1)
This article belongs to the Special Issue Xu’s Sealing and Flowing Theories of Fluids |
| DOI | 10.11648/j.ijepe.s.2016050401.14 |
| Page(s) | 31-34 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2016. Published by Science Publishing Group |
Pressure Energy, Pressure's Sustainability, Sealing Law, Sealing Theorem, Tightness, Leak Resistance
| [1] | ISO 19879 Metallic tube connections for fluid power and general use — Test methods for hydraulic fluid power connections |
| [2] | ISO 5208 Industrial valves — Pressure testing of metallic valves |
| [3] | ISO/TR 11340 Rubber and rubber products — Hydraulic hose assemblies — External leakage classification for hydraulic systems |
| [4] | XU Changxiang. XU's Sealing Theory and Rectangular & O-Shaped Ring Seals [J]. PETRO-CHEMICAL EQUIPMENT，2013，42(2)：78-85. |
APA Style
Xu Changxiang. (2016). Definition, Quantifying and Gauging of Tightness. International Journal of Energy and Power Engineering, 5(4-1), 31-34. https://doi.org/10.11648/j.ijepe.s.2016050401.14
ACS Style
Xu Changxiang. Definition, Quantifying and Gauging of Tightness. Int. J. Energy Power Eng. 2016, 5(4-1), 31-34. doi: 10.11648/j.ijepe.s.2016050401.14
AMA Style
Xu Changxiang. Definition, Quantifying and Gauging of Tightness. Int J Energy Power Eng. 2016;5(4-1):31-34. doi: 10.11648/j.ijepe.s.2016050401.14
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Download@article{10.11648/j.ijepe.s.2016050401.14,
author = {Xu Changxiang},
title = {Definition, Quantifying and Gauging of Tightness},
journal = {International Journal of Energy and Power Engineering},
volume = {5},
number = {4-1},
pages = {31-34},
doi = {10.11648/j.ijepe.s.2016050401.14},
url = {https://doi.org/10.11648/j.ijepe.s.2016050401.14},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijepe.s.2016050401.14},
abstract = {A leakage for fluid in a pressure vessel to flow through its sealing joint to the atmosphere is just like a leakage for electric charges in a capacitor to flow through its insulator to the ground, and hence there is a sealing law for pressure vessels that is completely similar to Ohm's law, stating the leakage current IL flowing through a sealing joint of pressure vessels is directly proportional to the pressure difference p between its two ends and inversely proportional to its leak resistance RL, or IL = p/RL. Thus it can be known according to the sealing law that the tightness or leak resistance (RL = p/IL = pt/C) is the product of pressure p and time t expended on leaking a unit cubage of fluid through sealing joints under a fixed pressure p and can be gauged according to the sealing theorem RL = p(p – 0.5Δp)Δt/(ΔpC), and the greater the value of p/Δp, the shorter the time required to observe, or the closer to being done at a constant pressure and temperature the test, and the more accurate the test result, where p is the test pressure, Δt is the time expended on the pressure decay from p to (p – Δp), C is the test fluid cubage.},
year = {2016}
}
TY - JOUR T1 - Definition, Quantifying and Gauging of Tightness AU - Xu Changxiang Y1 - 2016/08/24 PY - 2016 N1 - https://doi.org/10.11648/j.ijepe.s.2016050401.14 DO - 10.11648/j.ijepe.s.2016050401.14 T2 - International Journal of Energy and Power Engineering JF - International Journal of Energy and Power Engineering JO - International Journal of Energy and Power Engineering SP - 31 EP - 34 PB - Science Publishing Group SN - 2326-960X UR - https://doi.org/10.11648/j.ijepe.s.2016050401.14 AB - A leakage for fluid in a pressure vessel to flow through its sealing joint to the atmosphere is just like a leakage for electric charges in a capacitor to flow through its insulator to the ground, and hence there is a sealing law for pressure vessels that is completely similar to Ohm's law, stating the leakage current IL flowing through a sealing joint of pressure vessels is directly proportional to the pressure difference p between its two ends and inversely proportional to its leak resistance RL, or IL = p/RL. Thus it can be known according to the sealing law that the tightness or leak resistance (RL = p/IL = pt/C) is the product of pressure p and time t expended on leaking a unit cubage of fluid through sealing joints under a fixed pressure p and can be gauged according to the sealing theorem RL = p(p – 0.5Δp)Δt/(ΔpC), and the greater the value of p/Δp, the shorter the time required to observe, or the closer to being done at a constant pressure and temperature the test, and the more accurate the test result, where p is the test pressure, Δt is the time expended on the pressure decay from p to (p – Δp), C is the test fluid cubage. VL - 5 IS - 4-1 ER -
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