CN101568818A - Test method for soundness of secondary barrier in liquefied gas tank - Google Patents
Test method for soundness of secondary barrier in liquefied gas tank Download PDFInfo
- Publication number
- CN101568818A CN101568818A CNA2007800482642A CN200780048264A CN101568818A CN 101568818 A CN101568818 A CN 101568818A CN A2007800482642 A CNA2007800482642 A CN A2007800482642A CN 200780048264 A CN200780048264 A CN 200780048264A CN 101568818 A CN101568818 A CN 101568818A
- Authority
- CN
- China
- Prior art keywords
- pressure
- space
- barrier
- insulating space
- differential detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
- F17C3/02—Vessels not under pressure with provision for thermal insulation
- F17C3/022—Land-based bulk storage containers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
- F17C3/02—Vessels not under pressure with provision for thermal insulation
- F17C3/025—Bulk storage in barges or on ships
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B13/00—Measuring arrangements characterised by the use of fluids
- G01B13/24—Measuring arrangements characterised by the use of fluids for measuring the deformation in a solid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/023—Pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S251/00—Valves and valve actuation
Abstract
A test method for soundness of a secondary barrier in a liquefied gas tank includes the steps of: (A) observing an integrated automation system; (B) performing a first differential pressure test when abnormality is observed through the observation in the step (A); and (C) performing, when a pressure in an insulation space and a pressure in an inter-barrier space are not equal to each other or pressure reversal occurs after the pressures become equal to each other as a result of the first differential pressure test in the step (B), a second differential pressure test. The test method further includes: (D) performing, when the pressure in the insulation space and the pressure in the inter-barrier space are equal to each other as a result of the second differential pressure test in the step (C), a third differential pressure test.
Description
Technical field
The present invention relates to a kind of detection method that is used for the steadiness (soundness) of the secondary barrier of liquid gas storage tank, the steadiness of the secondary barrier in the liquid gas storage tank of the boats and ships of this method in can evaluation work.
Background technology
The known method that rock gas (as noticeable clean fuel) is transported to the consumption area from the production area mainly contains following two kinds: by the pipeline transportation gaseous natural gas; And by boats and ships transportation liquified natural gas.
By the pipeline transportation rock gas, in order transporting for long-distance, to need handle high voltages gas, and to need maintenance and repair pipeline constantly.In addition, pipeline is installed in the influence that is subjected to the geopolitics problem to a great extent.
Recently, in order to overcome the problems referred to above, be extensive use of a kind of method by the boats and ships transport natural gas.Especially, along with the development of utmost point cryogenic object storing technology and large ship manufacturing technology, make it possible to easily make the liquified natural gas carrier (LNGC) of transportation liquified natural gas.Therefore, use the boats and ships transport natural gas more and more.
The jar that is used for liquified natural gas carrier (LNGC) broadly is divided into diaphragm type and self.In diaphragm type and self, more extensive employing recently be diaphragm type.
In diaphragm type (especially MARK 3 types), jar is made by the thick ripple stainless steel of 1.2mm.This has formed the one-level barrier that stores utmost point low-temperature liquid gas.If the one-level barrier goes wrong, then liquefied natural gas (LNG) will leak and damage hull from jar.For avoiding above-mentioned damage, in insulating space, added low-temperature liquid gas and the secondary barrier of the hull isolation schedule time.
When making boats and ships, by the steadiness of the airtight detection method assessment of secondary barrier secondary barrier.In airtight detection method, first insulating space is kept under atmospheric pressure, the pressure drop of second insulating space is low to moderate-530 millibars, then measure the pressure that reduces and get back to the required time of atmospheric pressure.The fact of pressure exchange is carried out in airtight detection method utilization by the poriness of secondary barrier.
Yet the boats and ships during said method only can be used for making promptly can not be used for the boats and ships of work.Therefore, the method that needs the secondary barrier steadiness in a kind of liquid gas storage tank of the boats and ships in can evaluation work.
Summary of the invention
Technical matters
In view of the above problems, the invention provides a kind of detection method of steadiness of the secondary barrier that is used for liquid gas storage tank, the steadiness of the secondary barrier in the liquid gas storage tank of the boats and ships of this method in can evaluation work.
Technical scheme
According to an aspect of the present invention, provide a kind of detection method that is used for the steadiness of liquid gas storage tank secondary barrier, this method may further comprise the steps: (A) observation complex automatic system; (B), carry out first pressure reduction (differentialpressure) and detect when observing by the observation in the step (A) when unusual; And (C) as the result of described first pressure differential detection in the step (B), pressure between or pressure in described insulating space unequal when the pressure in the space between the pressure in the insulating space and barrier and described barrier in the space becomes when the pressure counter-rotating taking place after equating, carries out second pressure differential detection.
Preferably, this detection method further comprises: (D) as the result of described second pressure differential detection in the step (C), when the pressure in the space between the pressure in the described insulating space and described barrier equates, carry out the 3rd pressure differential detection.
Preferably, described first pressure differential detection comprises: (a-1) when described liquid gas storage tank is in steady state (SS), check operation valve and pressure transmitter; (b-1) confirm whether the safety valve that is used for described insulating space leaks; (c-1) the valve control model is transformed into manual mode from automatic mode; (d-1) between the space pressure reduction is being set between described insulating space and described barrier; (e-1) close described operation valve, observation pressure change and recording process variable; (f-1) determine whether the pressure in the space equates between pressure and described barrier in the described insulating space; And whether (g-1) when the pressure in the space equates between the pressure when determine described insulating space in step (f-1) in and described barrier, determining between pressure and the described barrier in described insulating space that the pressure in the space becomes pressure takes place after equating and reverses.
Preferably, described first pressure differential detection further comprises: (h-1) when determining the pressure counter-rotating takes place in step (g-1), described valve control model is transformed into described automatic mode from described manual mode, checks the leakage part of nitrogen pressure charging system, and return step (c-1).
Preferably, described second pressure differential detection comprises: (a-2) when described liquid gas storage tank is in steady state (SS), check operation valve and pressure transmitter; (b-2) confirm whether the safety valve that is used for described insulating space leaks; (c-2) the valve control model is transformed into manual mode from automatic mode; (d-2) between the space pressure reduction is being set between described insulating space and described barrier; (e-2) close described operation valve, close the hand control valve that places described operation valve front and back, observation pressure change and recording process variable; And (f-2) determine whether the pressure in the space equates between pressure and described barrier in the described insulating space.
Preferably, described second pressure differential detection further comprises: (g-2) when the pressure in the space between pressure in definite described insulating space in step (f-2) and described barrier is unequal, the testing result of described first pressure differential detection and the testing result of described second pressure differential detection are compared; And (h-2) when determining that in step (g-2) testing result is inequality, described valve control model is transformed into described automatic mode from described manual mode, check the leakage part of nitrogen pressure charging system, and return step (c-2).
Preferably, described the 3rd pressure differential detection comprises: (a-3) when described liquid gas storage tank is in steady state (SS), check operation valve and pressure transmitter; (b-3) confirm whether the safety valve that is used for described insulating space leaks; (c-3) sign is provided for the parts of nitrogen pressure charging system; (d-3) the valve control model is transformed into manual mode from automatic mode; (e-3) between the space pressure reduction is being set between described insulating space and described barrier; (f-3) close described operation valve, close the hand control valve that places described operation valve front and back, observation pressure change and recording process variable; And (g-3) determine whether the pressure in the space equates between pressure and described barrier in the described insulating space.
Preferably he, described the 3rd pressure differential detection further comprises: when (h-3) pressure in the space equates between the pressure when determine described insulating space in step (g-3) in and described barrier, determine to become at described pressure and whether pressure takes place after equal and reverse; (i-3) when in step (h-3), determining the pressure counter-rotating does not take place, between described insulating space and described barrier, between the space pressure (equivalent pressure) that equates is set; (j-3) close described operation valve, close the hand control valve that places described operation valve front and back, open the operation valve that is used for discharging gas, observation pressure change and recording process variable from described insulating space; (k-3) determine whether the pressure in the space equates between pressure and described barrier in the described insulating space; When (1-3) pressure in the space equates between the pressure when determine described insulating space in step (k-3) in and described barrier, described valve control model is transformed into described automatic mode from described manual mode; And described leakages of (m-3) checking described nitrogen pressure charging system partly and return step (d-3).
Preferably, described the 3rd pressure differential detection further comprises: when determining the pressure counter-rotating takes place in step (h-3), skip to step (1-3).
Preferably, described the 3rd pressure differential detection further comprises: when the pressure in the space between pressure in definite described insulating space in step (k-3) and described barrier is unequal, carry out the airtight detection of secondary barrier.
Beneficial effect
According to the present invention, provide a kind of detection method of steadiness of the secondary barrier that is used for liquid gas storage tank, the steadiness of the secondary barrier in the boats and ships liquid gas storage tank of this method in can evaluation work.
Description of drawings
By hereinafter to the description of embodiment target of the present invention and feature being become apparent in conjunction with the accompanying drawings, wherein:
Fig. 1 illustrates the structural representation of liquid gas storage tank of method that is used to detect the secondary barrier steadiness that has been employed according to embodiment of the present invention;
Fig. 2 illustrates the process flow diagram of the method for the liquid gas storage tank secondary barrier steadiness that is used for detecting Fig. 1;
Fig. 3 and Fig. 4 illustrate the process flow diagram according to the first pressure differential detection process of embodiment of the present invention;
Fig. 5 and Fig. 6 illustrate the process flow diagram according to the second pressure differential detection process of embodiment of the present invention; And
Fig. 7 and Fig. 8 illustrate the process flow diagram according to the 3rd pressure differential detection process of embodiment of the present invention.
Embodiment
Below with reference to the accompanying drawing that constitutes this paper part embodiments of the present invention are described in detail.Identical drawing reference numeral is represented identical parts among the figure.
Fig. 1 illustrates the structural representation of liquid gas storage tank of method that is used to detect the secondary barrier steadiness that has been employed according to embodiment of the present invention.
As shown in Figure 1, liquid gas storage tank 10 comprises one-level barrier 100 and secondary barrier 200.Because the existence of one-level barrier 100 and secondary barrier 200 has formed space IBS and insulating space IS between barrier.Space IBS and insulating space IS are connected to the nitrogen pressure charging system between barrier, and this nitrogen pressure charging system is by providing nitrogen for IBS and IS space for nitrogen operation valve 110 and 210.In addition, space IBS and insulating space IS are connected to denitrogen operation valve 120 and 220 between barrier, and the gas in IBS and the IS space enters in the atmosphere by denitrogen operation valve 120 and 220.By this structure, can keep the interior pressure of space IBS and IS.Hand control valve 111,112,121,122,211,212,221 and 222 places the front and back of operation valve 110,120,210 and 220.Between barrier in space IBS and the insulating space IS, provide pressure transmitter (PT) 130 and 230 to be used to measure the interior pressure of space IBS and insulating space IS between barrier.In addition, in insulating space IS, provide the safety valve 240 that is used for insulating space IS.
Fig. 2 illustrates the process flow diagram of method of steadiness of the secondary barrier of the liquid gas storage tank that is used for detecting Fig. 1.
As shown in Figure 2, in order to assess the steadiness of the secondary barrier 200 in the liquid gas storage tank 10, at first, observation complex automatic system (step S100).Determine whether to observe (step S110) unusually by this observation.Be in normal condition if determine liquid gas storage tank 10, then execution in step 100 once more.If determine to observe unusually, then carry out first pressure differential detection (step S200).In first pressure differential detection, at first between the IBS of space pressure reduction is being set between insulating space IS and barrier, observe the variation of pressure then.If pressure takes place after equating and reverse by observing between the pressure determined among the insulating space IS and barrier the pressure among the IBS of space equate and becoming at pressure, the leakage of then checking the nitrogen pressure charging system partly and repeat first pressure differential detection.If, then carry out second pressure differential detection (step S400) by observing between the pressure determined among the insulating space IS and barrier the pressure among the IBS of space unequal or become at pressure and pressure not to take place after equating and reverse.
In second pressure differential detection, between the IBS of space pressure reduction is being set between insulating space IS and barrier, observe the variation of pressure then.If by observing between the pressure determined among the insulating space IS and barrier the unequal and first pressure differential detection result of the pressure among the IBS of space come to the same thing with second pressure differential detection, then the steadiness of secondary barrier 200 obtains affirmation.If determine between pressure among the insulating space IS and barrier that by observation the unequal and first pressure differential detection result of the pressure among the IBS of space and the second pressure differential detection result are inequality, then check the leakage part of the nitrogen pressure charging system in the barrier, repeat first pressure differential detection then.If determine that by observation the pressure among the IBS of space equates between pressure and barrier among the insulating space IS, then carry out the 3rd pressure differential detection (step S600).
In the 3rd pressure differential detection, between the IBS of space pressure reduction is being set between insulating space IS and barrier, observe the variation of pressure then.If unequal by the pressure among the space IBS between pressure among the definite insulating space IS of observation and barrier, then the steadiness of secondary barrier 200 obtains confirming.If equate and become pressure to take place after equating and reverse at pressure by the pressure of observing space IBS between the pressure determined among the insulating space IS and barrier, then check the leakage part of nitrogen pressure charging system, repeat this pressure differential detection then.If pressure does not take place after equating and reverses by observing determining to become at pressure, then between insulating space IS and barrier, between the IBS of space the pressure that equates is set, observe the variation of pressure then.By the detection of the pressure that equates,, then carry out the airtight detection of secondary barrier if determine that the pressure among the IBS of space equates between pressure and barrier among the insulating space IS.If the pressure between pressure among definite insulating space IS and barrier among the IBS of space is unequal, then check the leakage part of nitrogen pressure charging system, repeat this pressure differential detection then.
Fig. 3 and Fig. 4 illustrate the process flow diagram according to the first pressure differential detection process of embodiment of the present invention.
As shown in Figure 3 and Figure 4, in first pressure differential detection, determine at first whether liquid gas storage tank 10 is in steady state (SS) (step S201).If determine that liquid gas storage tank 10 is not in steady state (SS), then wait for up to liquid gas storage tank 10 reaching steady state (SS) (step S202).Be in steady state (SS) if determine liquid gas storage tank 10, then check operation valve 110,120,210 and 220 and pressure transmitter 130 and 230 (step S203).Then, affirmation is used for the leakage (step S204) of the safety valve 240 of insulating space IS, and the valve control model is transformed into manual mode (step S205) from automatic mode.Then, pressure reduction (step S206) is being set, closed control valve 110,120,210 and 220 (step S207) between insulating space IS and barrier between the IBS of space.Then, the variation of observation pressure, and recording process variable (step S208).Then, determine whether the pressure among the IBS of space equates (step S209) between pressure and barrier among the insulating space IS.If determine that in step S209 the pressure among the IBS of space equates between pressure and the barrier among the insulating space IS, then determine to become at pressure whether pressure reverse (step S210) takes place after equating.When the pressure counter-rotating does not take place, carry out second pressure differential detection (step S211).Simultaneously, unequal as if the pressure among the space IBS between pressure among definite insulating space IS in step S209 and barrier, then carry out second pressure differential detection (step S211).
In step S210, take place if determine the pressure counter-rotating, then the valve control model is transformed into automatic mode (step S212) from manual mode.Then check the leakage part (step S213) of nitrogen pressure charging system.Subsequently, this process enters step S205.
Fig. 5 and Fig. 6 illustrate the process flow diagram according to the second pressure differential detection process of embodiment of the present invention.
As shown in Figure 5 and Figure 6, in second pressure differential detection, determine at first whether liquid gas storage tank 10 is in steady state (SS) (step S401).If liquid gas storage tank 10 is not in steady state (SS), then wait for up to liquid gas storage tank 10 reaching steady state (SS) (step S402).If liquid gas storage tank 10 is in steady state (SS), then check operation valve 110,120,210 and 220 and pressure transmitter 130 and 230 (step S403).Then, affirmation is used for the leakage (step S404) of the safety valve 240 of insulating space IS, and the valve control model is transformed into manual mode (step S405) from automatic mode.Then, pressure reduction (step S406) is being set, closed control valve 110,120,210 and 220 (step S407) between insulating space IS and barrier between the IBS of space.Then, close the hand control valve 111,112,121,122,211,212,221 and 222 (the step S408) that place operation valve 110,120,210 and 220 front and back, the variation of observation pressure, and recording process variable (step S409).Then, determine whether the pressure among the IBS of space equates (step S410) between pressure and barrier among the insulating space IS.When the pressure among the space IBS between the pressure among the insulating space IS and barrier equates, carry out the 3rd pressure differential detection (step S411).When the pressure among the space IBS between pressure among the insulating space IS and barrier is unequal, determine the first pressure differential detection result and the second pressure differential detection result whether identical (step S412).If the first pressure differential detection result and second pressure differential detection come to the same thing, then the steadiness of secondary barrier obtains confirming (step S413).Otherwise, the valve control model is transformed into automatic mode (step S414) from manual mode.Then, check the leakage part (step S415) of nitrogen pressure charging system.Subsequently, this process enters step S405.
Fig. 7 and Fig. 8 illustrate the process flow diagram of the 3rd pressure differential detection process according to the embodiment of the present invention.
As shown in Figure 7 and Figure 8, when the 3rd pressure differential detection, determine at first whether liquid gas storage tank 10 is in steady state (SS) (step S601).If liquid gas storage tank 10 is not in steady state (SS), then wait for up to liquid gas storage tank 10 reaching steady state (SS) (step S602).If liquid gas storage tank 10 is in steady state (SS), then check operation valve 110,120,210 and 220 and pressure transmitter 130 and 230 (step S603).Then, affirmation is used for the leakage (step S604) of the safety valve 240 of insulating space IS, sign (step S605) is provided for the parts of nitrogen pressure charging system.Then the valve control model is transformed into manual mode (step S606) from automatic mode, and pressure reduction (step S607) is being set between the IBS of space between insulating space IS and barrier.Follow closed control valve 110,120,210 and 220 (step S608), and close hand control valve 111,112,121,122,211,212,221 and 222 (the step S609) that place operation valve 110,120,210 and 220 front and back.Then, the variation of observation pressure, and recording process variable (step S610).Then, determine whether the pressure among the IBS of space equates (step S611) between pressure and barrier among the insulating space IS.If the pressure between pressure among the insulating space IS and barrier among the IBS of space is unequal, then the steadiness of secondary barrier obtains confirming (step S612).When the pressure among the space IBS between the pressure among the insulating space IS and barrier equates, determine whether to take place pressure counter-rotating (step S613).When the pressure counter-rotating does not take place, equal pressure (step S614) is being set between the IBS of space between insulating space IS and barrier.Follow closed control valve 110,120,210 and 220 (step S615), and close hand control valve 111,112,121,122,211,212,221 and 222 (the step S616) that place operation valve 110,120,210 and 220 front and back.Then, only open the denitrogen operation valve 220 (step S617) that is used for insulating space IS, the variation of observation pressure, and recording process variable (step S618).Then, determine whether the pressure among the IBS of space equates (step S619) between pressure and barrier among the insulating space IS.When the pressure among the space IBS between pressure among the insulating space IS and barrier is unequal, carry out secondary barrier 200 airtight detections (step S620).If the pressure between the pressure among the insulating space IS and barrier among the IBS of space equates, then the valve control model is transformed into automatic mode (step S621) from manual mode.
Simultaneously, in step S613, take place if determine the pressure counter-rotating, then this process enters step S621, and the valve control model is transformed into automatic mode from manual mode.After step S621, check the leakage part (step S622) of nitrogen pressure charging system.
In method,, can repeat a step (for example, checking the step of the leakage part of nitrogen pressure charging system) or institute in steps as the required strategic point of those skilled in the art according to the steadiness of the secondary barrier 200 that is used for detecting liquid gas storage tank 10 of the present invention.
Although invention has been described by embodiment, it will be understood by those skilled in the art that under the situation that does not deviate from claim of the present invention institute restricted portion and can carry out various changes and modification the present invention.
Claims (10)
1. detection method that is used for the steadiness of liquid gas storage tank secondary barrier said method comprising the steps of:
(A) observation complex automatic system;
(B) when observing by the observation in the step (A) when unusual, carry out first pressure differential detection; And
(C) as the result of described first pressure differential detection in the step (B), pressure between or pressure in described insulating space unequal when the pressure in the space between the pressure in the insulating space and barrier and described barrier in the space becomes when the pressure counter-rotating taking place after equating, carries out second pressure differential detection.
2. detection method as claimed in claim 1 further comprises:
(D), when the pressure in the space between the pressure in the described insulating space and described barrier equates, carry out the 3rd pressure differential detection as the result of described second pressure differential detection in the step (C).
3. detection method as claimed in claim 1, wherein, described first pressure differential detection comprises:
(a-1) when described liquid gas storage tank is in steady state (SS), check operation valve and pressure transmitter;
(b-1) confirm whether the safety valve that is used for described insulating space leaks;
(c-1) the valve control model is transformed into manual mode from automatic mode;
(d-1) between the space pressure reduction is being set between described insulating space and described barrier;
(e-1) close described operation valve, observation pressure change and recording process variable;
(f-1) determine whether the pressure in the space equates between pressure and described barrier in the described insulating space; And
Whether when (g-1) pressure in the space equates between the pressure when determine described insulating space in step (f-1) in and described barrier, determining between pressure and the described barrier in described insulating space that the pressure in the space becomes pressure takes place after equating and reverses.
4. detection method as claimed in claim 3, wherein, described first pressure differential detection further comprises:
(h-1) when in step (g-1), determining the pressure counter-rotating takes place, described valve control model is transformed into described automatic mode from described manual mode, checks the leakage part of nitrogen pressure charging system, and return step (c-1).
5. detection method as claimed in claim 1, wherein, described second pressure differential detection comprises:
(a-2) when described liquid gas storage tank is in steady state (SS), check operation valve and pressure transmitter;
(b-2) confirm whether the safety valve that is used for described insulating space leaks;
(c-2) the valve control model is transformed into manual mode from automatic mode;
(d-2) between the space pressure reduction is being set between described insulating space and described barrier;
(e-2) close described operation valve, close the hand control valve that places described operation valve front and back, observation pressure change and recording process variable; And
(f-2) determine whether the pressure in the space equates between pressure and described barrier in the described insulating space.
6. detection method as claimed in claim 5, wherein, described second pressure differential detection further comprises:
(g-2) when the pressure in the space between pressure in definite described insulating space in step (f-2) and described barrier is unequal, the testing result of described first pressure differential detection and the testing result of described second pressure differential detection are compared; And
(h-2) when in step (g-2), determining that testing result is inequality, described valve control model is transformed into described automatic mode from described manual mode, checks the leakage part of nitrogen pressure charging system, and return step (c-2).
7. detection method as claimed in claim 2, wherein, described the 3rd pressure differential detection comprises:
(a-3) when described liquid gas storage tank is in steady state (SS), check operation valve and pressure transmitter;
(b-3) confirm whether the safety valve that is used for described insulating space leaks;
(c-3) sign is provided for the parts of nitrogen pressure charging system;
(d-3) the valve control model is transformed into manual mode from automatic mode;
(e-3) between the space pressure reduction is being set between described insulating space and described barrier;
(f-3) close described operation valve, close the hand control valve that places described operation valve front and back, observation pressure change and recording process variable; And
(g-3) determine whether the pressure in the space equates between pressure and described barrier in the described insulating space.
8. detection method as claimed in claim 7, wherein, described the 3rd pressure differential detection further comprises:
When (h-3) pressure in the space equates between the pressure when determine described insulating space in step (g-3) in and described barrier, determine to become and whether pressure takes place after equal and reverse at described pressure;
(i-3) when in step (h-3), determining the pressure counter-rotating does not take place, between described insulating space and described barrier, between the space pressure that equates is set;
(j-3) close described operation valve, close the hand control valve that places described operation valve front and back, open the operation valve that is used for discharging gas, observation pressure change and recording process variable from described insulating space;
(k-3) determine whether the pressure in the space equates between pressure and described barrier in the described insulating space;
When (l-3) pressure in the space equates between the pressure when determine described insulating space in step (k-3) in and described barrier, described valve control model is transformed into described automatic mode from described manual mode; And
(m-3) described leakages of checking described nitrogen pressure charging system partly and return step (d-3).
9. detection method as claimed in claim 8, wherein, described the 3rd pressure differential detection further comprises: when determining the pressure counter-rotating takes place in step (h-3), skip to step (1-3).
10. detection method as claimed in claim 8, wherein, described the 3rd pressure differential detection further comprises: when the pressure in the space between pressure in definite described insulating space in step (k-3) and described barrier is unequal, carry out the airtight detection of secondary barrier.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2006-0137715 | 2006-12-29 | ||
| KR1020060137715 | 2006-12-29 | ||
| KR1020060137715A KR100870875B1 (en) | 2006-12-29 | 2006-12-29 | Test method for soundness of secondary barrier in the liquefied gas tank |
| PCT/KR2007/006963 WO2008082199A1 (en) | 2006-12-29 | 2007-12-28 | Test method for soundness of secondary barrier in liquefied gas tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101568818A true CN101568818A (en) | 2009-10-28 |
| CN101568818B CN101568818B (en) | 2011-06-08 |
Family
ID=39588787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800482642A Active CN101568818B (en) | 2006-12-29 | 2007-12-28 | Test method for soundness of secondary barrier in liquefied gas tank |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP5289325B2 (en) |
| KR (1) | KR100870875B1 (en) |
| CN (1) | CN101568818B (en) |
| ES (1) | ES2374805B1 (en) |
| MY (1) | MY159535A (en) |
| WO (1) | WO2008082199A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107257917A (en) * | 2015-02-27 | 2017-10-17 | 罗伯特·博世有限公司 | Component and method for the Leakage Test of container |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101019043B1 (en) * | 2008-11-17 | 2011-03-07 | 삼성중공업 주식회사 | Method for airtight test of cargo tank |
| WO2021096253A1 (en) * | 2019-11-14 | 2021-05-20 | 삼성중공업 주식회사 | Lng cargo hold test method, offshore structure to which same is applied, and liquid nitrogen supply system of offshore structure |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3413840A (en) * | 1966-04-19 | 1968-12-03 | Mcmullen John J | Leak detection system |
| FR2317649A1 (en) * | 1975-07-10 | 1977-02-04 | Technigaz | Leak detection system for space between two walls - monitors controlled flow of nitrogen and argon mixture around space |
| US4404843A (en) * | 1981-07-20 | 1983-09-20 | Marathon Oil Company | Cryogenic storage tank leak detection system |
| JPS60219534A (en) | 1984-04-16 | 1985-11-02 | Kawasaki Heavy Ind Ltd | Gas leakage detection apparatus of double shell low temperature tank |
| JPS60244832A (en) | 1984-05-21 | 1985-12-04 | Mitsubishi Heavy Ind Ltd | Testing method of leak in tank barrier |
| DE3750043D1 (en) * | 1987-10-28 | 1994-07-14 | Martin Lehmann | Method and use of an arrangement for testing at least one hollow body for its volume behavior. |
| JPH0440334A (en) * | 1990-06-05 | 1992-02-10 | Nkk Corp | Defect detecting method for lng tank |
| CN2187787Y (en) * | 1994-03-31 | 1995-01-18 | 刘兴汉 | Sealing property check machine for steel pot of liquefied petroleum gas |
| WO1996036853A1 (en) * | 1995-05-19 | 1996-11-21 | Matsushita Electric Industrial Co., Ltd. | Gas safety management system |
| US6360595B1 (en) * | 2001-03-16 | 2002-03-26 | Ethicon Endo-Surgery, Inc. | Liquid measuring device and method of using |
| JP2005257340A (en) * | 2004-03-09 | 2005-09-22 | Toyota Motor Corp | Gas leak detection device for high-pressure tank system |
| JP2005264885A (en) * | 2004-03-22 | 2005-09-29 | Chuo Motor Wheel Co Ltd | Liquefied gas fuel reservoir device |
| JP2005351197A (en) * | 2004-06-11 | 2005-12-22 | Aisan Ind Co Ltd | Device for supplying liquefied gas fuel |
-
2006
- 2006-12-29 KR KR1020060137715A patent/KR100870875B1/en active IP Right Grant
-
2007
- 2007-12-28 WO PCT/KR2007/006963 patent/WO2008082199A1/en active Application Filing
- 2007-12-28 JP JP2009543957A patent/JP5289325B2/en active Active
- 2007-12-28 CN CN2007800482642A patent/CN101568818B/en active Active
- 2007-12-28 MY MYPI20092581A patent/MY159535A/en unknown
- 2007-12-28 ES ES200950033A patent/ES2374805B1/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107257917A (en) * | 2015-02-27 | 2017-10-17 | 罗伯特·博世有限公司 | Component and method for the Leakage Test of container |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100870875B1 (en) | 2008-11-28 |
| JP2010514622A (en) | 2010-05-06 |
| KR20080062218A (en) | 2008-07-03 |
| WO2008082199A1 (en) | 2008-07-10 |
| ES2374805B1 (en) | 2012-10-29 |
| MY159535A (en) | 2017-01-13 |
| CN101568818B (en) | 2011-06-08 |
| JP5289325B2 (en) | 2013-09-11 |
| ES2374805A1 (en) | 2012-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102285764B1 (en) | Sealed, heat-insulated vessel housed in a buoyant structure | |
| CN101568818B (en) | Test method for soundness of secondary barrier in liquefied gas tank | |
| US20220034453A1 (en) | Method for checking the leakproofness of a leakproof and thermally insulating tank for storing a fluid | |
| US3529463A (en) | Method and apparatus for testing battery casings for leaks | |
| CN110336058A (en) | A kind of fuel cell pack detection method and detection device | |
| KR101588685B1 (en) | Apparatus and method for leak detection of liquified gas | |
| CN111323304A (en) | Creep performance testing device and method | |
| KR100760828B1 (en) | Leak detection apparatus | |
| KR20090085458A (en) | Parts tester for an extremely low temperature | |
| KR101471152B1 (en) | Performance Test Device And Method For Cryogenic Liquefied Gas Storage Tank | |
| KR101017488B1 (en) | Method of leak detection for lngc cargo tank using infrared rays camera | |
| KR102031507B1 (en) | Limitation of damage on ships with pipe system | |
| KR20100088437A (en) | Method of leak detection for lngc cargo tank using infrared rays camera | |
| CN108534820B (en) | Method for measuring dynamic evaporation rate of cryogenic liquid tank container | |
| US20240060849A1 (en) | Leak test condition design method, leak test condition design device, leak testing method, and leak testing device | |
| KR101551789B1 (en) | Apparatus for determining leakage location in an independence type storage tank | |
| CN115962898A (en) | Air tightness testing device and method for fuel cell | |
| CN207336004U (en) | A kind of low temperature valve cryogenic property tests system | |
| KR20210104413A (en) | A tank for monitoring of sloshing to liquid cargo in ship | |
| CN216081942U (en) | Electric pile air tightness detection system | |
| CN109781364A (en) | Gas leak detection device and method | |
| CN104180959B (en) | A kind of fuel tanker pressure tester | |
| EP4269227A1 (en) | State estimation system and state estimation method for watercraft liquified gas tank | |
| KR20070090656A (en) | Equipment for inpectirp the floot valve for liquified gas vaporizer | |
| CN117147072A (en) | Quick helium detection system and method for local leak detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |