CN116952819A - Simulation test method for pipeline corrosion - Google Patents
Simulation test method for pipeline corrosion Download PDFInfo
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- CN116952819A CN116952819A CN202310891727.2A CN202310891727A CN116952819A CN 116952819 A CN116952819 A CN 116952819A CN 202310891727 A CN202310891727 A CN 202310891727A CN 116952819 A CN116952819 A CN 116952819A
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- 230000007797 corrosion Effects 0.000 title claims abstract description 74
- 238000005260 corrosion Methods 0.000 title claims abstract description 74
- 238000004088 simulation Methods 0.000 title claims abstract description 49
- 238000010998 test method Methods 0.000 title claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 238000003860 storage Methods 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 16
- 239000003208 petroleum Substances 0.000 claims description 2
- 239000013535 sea water Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to a simulation test method of pipeline corrosion, which comprises the steps of adopting a simulation test device, wherein the device comprises a shell, a heating storage tank, a high-pressure metering pump and a simulation pipeline are arranged in the shell, and the simulation test of the corrosion amount of the pipeline on site is conveniently and rapidly realized through simulation of the pipeline on site. The invention does not need to go to the pipeline site, only adopts the simulation device to simulate and detect the pipeline site parameters, realizes the detection of the pipeline corrosion amount, is convenient and quick, and can accurately reflect the corrosion condition of the pipeline on site. The problem of on-site pipeline, especially on-site pipeline corrosion test difficulty under severe conditions is solved.
Description
Technical Field
The invention relates to a simulation test method for pipeline corrosion, and belongs to the technical field of pipeline corrosion tests.
Background
In industrial production or material transfer processes, pipelines are often used, and metal pipelines are one of the common pipelines. With the continuous operation of the pipeline, the pipeline is corroded more rapidly under the action of severe environment and corrosive medium. Therefore, concern over pipe corrosion is critical to safe production.
Pipeline corrosion detection refers to in-pipeline detection for the purpose of detecting metal loss such as pipe wall corrosion. The method is a basic method for knowing the damage condition of the in-service pipeline in the working environment and ensuring the detection of defects and damage before serious problems occur in the pipeline. Traditional methods for detecting pipeline damage are excavation inspection or pipeline pressure testing, which are costly and typically require down-transportation. The corrosion detector utilizing the magnetic leakage technology and the ultrasonic technology is used for detecting the inside of the pipeline, and the size and the position of the damage such as the corrosion pit, the stress corrosion crack, the fatigue crack and the like can be detected.
CN102768228A discloses a method for measuring corrosion of an online pipeline, comprising: before corrosion measurement, a processor firstly finds and stores a plurality of frequency points with minimum interference and correction parameters; the processor informs the frequency conversion signal source to apply excitation signals outwards at the frequency point with the minimum interference during corrosion measurement, the processor superimposes the acquired signals in the time domain and the frequency domain, the resistance ratio of the resistance of the measured body and the temperature compensation sheet at the frequency point is used as a measurement result, the stored correction coefficient is used for correcting the measurement result, and the corrosion rate of the measured body is calculated according to the corrected measurement result.
However, for numerous pipeline sites, especially pipeline sites under severe conditions, such as: offshore oil pipelines, high-temperature high-pressure water and gas pipelines and the like have great difficulty in on-site detection. Therefore, development of a corrosion test method simulating a field pipeline is imperative. For this purpose, the present invention is proposed.
Disclosure of Invention
Aiming at the defects of the prior art, in particular to the problem of difficult on-site pipeline corrosion test under severe conditions, the invention provides a simulation test method for pipeline corrosion.
The technical scheme of the invention is as follows:
the simulation test method of pipeline corrosion comprises the steps of adopting a simulation test device, wherein the device comprises a shell, a heating storage tank, a high-pressure metering pump and a simulation pipeline are arranged in the shell, the heating storage tank is connected with the high-pressure metering pump through a third connecting pipeline, the high-pressure metering pump is connected with the simulation pipeline through a first connecting pipeline, and the simulation pipeline is connected with the heating storage tank through a second connecting pipeline; the simulation pipeline is provided with a corrosion detection sensor, and the heating storage tank is provided with a temperature sensor and is connected with the heating controller;
the method comprises the following steps:
the simulated field pipeline transmission medium is put into a heating storage tank, and then the heating control of the transmission medium in the heating storage tank is realized through a temperature sensor and a heating controller, so that the temperature of the transmission medium is the same as that of the field pipeline medium; starting a high-pressure metering pump, realizing the circulation of a medium in a heating storage tank in a system consisting of the heating storage tank, the high-pressure metering pump and the simulation pipeline, and controlling the pressure and the flow rate in the simulation pipeline by controlling the flow rate of the high-pressure metering pump so as to enable the pressure and the flow rate to be the same as the working condition of the on-site pipeline; pipeline corrosion data is determined by testing of corrosion detection sensors.
According to the present invention, preferably, a first support plate is further provided inside the housing for supporting the heating controller.
According to the present invention, preferably, a second support plate is further provided inside the housing for supporting the analog pipe.
According to the present invention, preferably, the corrosion detection sensor is provided with two or more; further preferably, the simulated pipeline is provided with a elbow part, and the elbow part is provided with at least one corrosion detection sensor.
According to the present invention, preferably, the corrosion detection sensor is used for measuring the thickness of the pipe;
further preferably, the pipeline corrosion rate is calculated by the formula (1);
in the formula (1), V: the corrosion rate of the pipeline in mm/a; d, d 1 : the initial detection thickness of the pipeline is in mm; d, d 2 : the detection thickness of the pipeline is in mm; t: the service time of the pipeline is in a unit a.
According to the present invention, it is preferable that the corrosion detection sensor is connected to the server by a wire or wireless, and the corrosion amount is reflected from time to time.
According to the present invention, it is preferable that the pipe transmission medium is petroleum, sea water, high-temperature high-pressure steam, or the like.
The invention is not described in detail, but is in accordance with the prior art.
The invention has the beneficial effects that:
the invention does not need to go to the pipeline site, only adopts the simulation device to simulate and detect the pipeline site parameters, realizes the detection of the pipeline corrosion amount, is convenient and quick, and can accurately reflect the corrosion condition of the pipeline on site. The problem of on-site pipeline, especially on-site pipeline corrosion test difficulty under severe conditions is solved.
Drawings
FIG. 1 is a front view of the main structure of the simulation test apparatus of the present invention.
FIG. 2 is a left side view of the body structure of the simulation test apparatus of the present invention.
Wherein: 1. the device comprises a shell, 2, a heating storage tank, 3, a high-pressure metering pump, 4, a simulation pipeline, 5, a heating controller, 6, a first connecting pipeline, 7, a second connecting pipeline, 8, a third connecting pipeline, 9, a first supporting plate, 10, a second supporting plate, 11 and a temperature sensor.
Detailed Description
The invention will now be further illustrated by, but is not limited to, the following specific examples in connection with the accompanying drawings.
Example 1
The simulation test method of pipeline corrosion comprises the steps of adopting a simulation test device, as shown in fig. 1-2, wherein the simulation test device comprises a shell 1, a heating storage tank 2, a high-pressure metering pump 3 and a simulation pipeline 4 are arranged in the shell 1, the heating storage tank 2 is connected with the high-pressure metering pump 3 through a third connecting pipeline 8, the high-pressure metering pump 3 is connected with the simulation pipeline 4 through a first connecting pipeline 6, and the simulation pipeline 4 is connected with the heating storage tank 2 through a second connecting pipeline 7;
the simulation pipeline 4 is provided with a corrosion detection sensor, and the heating storage tank 2 is provided with a temperature sensor 11 and is connected with the heating controller 5;
the method comprises the following steps:
the simulated field pipeline transmission medium is put into the heating storage tank 2, and then the heating control of the transmission medium in the heating storage tank 2 is realized through the temperature sensor 11 and the heating controller 5, so that the temperature of the transmission medium is the same as that of the field pipeline medium; starting a high-pressure metering pump 3, realizing the circulation of a medium in the heating storage tank 2 in a system formed by the heating storage tank 2, the high-pressure metering pump 3 and the simulation pipeline 4, and controlling the pressure and the flow rate in the simulation pipeline 4 by controlling the flow rate of the high-pressure metering pump 3 so as to enable the pressure and the flow rate to be the same as the working condition of the field pipeline; pipeline corrosion data is determined by testing of corrosion detection sensors.
In this embodiment, the corrosion detection sensor is used to measure the thickness of the pipeline, and the corrosion rate of the pipeline is obtained by calculation according to formula (1);
in the formula (1), V: the corrosion rate of the pipeline in mm/a; d, d 1 : the initial detection thickness of the pipeline is in mm; d, d 2 : the detection thickness of the pipeline is in mm; t: the service time of the pipeline is in a unit a.
Example 2
As described in example 1, the difference is that:
the inside of the shell 1 is also provided with a first supporting plate 9 for supporting the heating controller 5.
Example 3
As described in example 2, the difference is that:
the inside of the shell 1 is also provided with a second supporting plate 10 for supporting the simulation pipeline 4.
Example 4
As described in example 3, the difference is that:
the two corrosion detection sensors are arranged, the simulation pipeline 4 is provided with a bent head part, the bent head part is provided with one corrosion detection sensor, and the horizontal position of the simulation pipeline 4 is provided with one corrosion detection sensor.
Example 5
As described in example 4, the difference is that:
the corrosion detection sensor is connected with the server in a wireless manner, so that the corrosion amount can be reflected in real time.
Test examples
The method of the embodiment 1 of the invention is used for simulating and testing the corrosion condition of a certain transmission pipeline. The transmission pipe related parameters are shown in table 1.
TABLE 1 actual parameters of a transport pipeline
| Original diameter of pipeline mm | 108 | Transmission pressure MPa | 0.38 |
| Original wall thickness of pipeline mm | 6.0 | Flow velocity m/s | 1.2 |
| Transmission medium | Crude oil with 40% water content | Length of pipe service d | 180 days |
| Transmission temperature °c | 96 | The current wall thickness of the pipeline is mm | 5.92 |
The simulation test was performed on the corrosion conditions of the field pipeline by the method described in example 1, and the simulation test operation parameters were the same as those of table 1. The test results are shown in Table 2.
Table 2 simulation test parameters of a certain transmission pipeline
| Original diameter of pipeline mm | 108 | Transmission pressure MPa | 0.38 |
| Original wall thickness of pipeline mm | 6.01 | Flow velocity m/s | 1.2 |
| Transmission medium | Crude oil with 40% water content | Simulation test time d | 180 days |
| Transmission temperature °c | 96 | Testing the wall thickness of the pipeline | 5.94 |
According to the formula (1), the actual corrosion rate of the pipeline is calculated to be 0.14mm/a, and the corrosion rate of the same part of a newly installed pipeline made of the same material in an oilfield site is calculated to be 0.16mm/a under the same running time and working condition.
Comparing the actual corrosion amount of the pipeline with the data of the simulated test corrosion amount, the method can be used for judging that: the error of the simulation test result is 12.5%, and the corrosion condition of the field pipeline can be accurately reflected. The testing method is convenient and quick, and solves the problem that the corrosion of the field pipeline is difficult to test under severe conditions.
Claims (8)
1. The simulation test method of the pipeline corrosion is characterized by comprising the steps of adopting a simulation test device, wherein the device comprises a shell, a heating storage tank, a high-pressure metering pump and a simulation pipeline are arranged in the shell, the heating storage tank is connected with the high-pressure metering pump through a third connecting pipeline, the high-pressure metering pump is connected with the simulation pipeline through a first connecting pipeline, and the simulation pipeline is connected with the heating storage tank through a second connecting pipeline; the simulation pipeline is provided with a corrosion detection sensor, and the heating storage tank is provided with a temperature sensor and is connected with the heating controller;
the method comprises the following steps:
the simulated field pipeline transmission medium is put into a heating storage tank, and then the heating control of the transmission medium in the heating storage tank is realized through a temperature sensor and a heating controller, so that the temperature of the transmission medium is the same as that of the field pipeline medium; starting a high-pressure metering pump, realizing the circulation of a medium in a heating storage tank in a system consisting of the heating storage tank, the high-pressure metering pump and the simulation pipeline, and controlling the pressure and the flow rate in the simulation pipeline by controlling the flow rate of the high-pressure metering pump so as to enable the pressure and the flow rate to be the same as the working condition of the on-site pipeline; pipeline corrosion data is determined by testing of corrosion detection sensors.
2. The method for simulating corrosion of a pipe according to claim 1, wherein a first support plate is further provided inside the housing for supporting the heating controller.
3. The method for simulating corrosion of a pipeline according to claim 1, wherein a second support plate is further provided inside the housing for supporting the simulated pipeline.
4. The method for simulating corrosion of a pipe according to claim 1, wherein said corrosion detecting sensor is provided with two or more.
5. The method for simulating corrosion of a pipeline according to claim 1, wherein the simulated pipeline is provided with a elbow portion, and the elbow portion is provided with at least one corrosion detection sensor.
6. The simulation test method of pipeline corrosion according to claim 1, wherein the corrosion detection sensor is used for measuring the thickness of the pipeline, and the pipeline corrosion rate is calculated by the formula (1);
in the formula (1), V: the corrosion rate of the pipeline in mm/a; d, d 1 : the initial detection thickness of the pipeline is in mm; d, d 2 : the detection thickness of the pipeline is in mm; t: the service time of the pipeline is in a unit a.
7. The simulation test method of pipeline corrosion according to claim 1, wherein the corrosion detection sensor is connected with a server through a wire or a wireless, so as to reflect the corrosion amount in real time.
8. The method for simulating corrosion of a pipeline according to claim 1, wherein the pipeline transmission medium is petroleum, sea water or high temperature and high pressure steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310891727.2A CN116952819A (en) | 2023-07-20 | 2023-07-20 | Simulation test method for pipeline corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310891727.2A CN116952819A (en) | 2023-07-20 | 2023-07-20 | Simulation test method for pipeline corrosion |
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| Publication Number | Publication Date |
|---|---|
| CN116952819A true CN116952819A (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310891727.2A Pending CN116952819A (en) | 2023-07-20 | 2023-07-20 | Simulation test method for pipeline corrosion |
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| CN (1) | CN116952819A (en) |
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- 2023-07-20 CN CN202310891727.2A patent/CN116952819A/en active Pending
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