Pipeline pressure test cleaning process

Abstract

The invention discloses a pipeline pressure test cleaning process, and relates to the technical field of compressor pipelines. The pipeline pressure test cleaning process comprises the following steps that two blind plates, an air compressor and a pressure gauge are provided, the two blind plates are installed at an air inlet and an air outlet of a to-be-detected pipeline respectively, the air compressor is communicated with the interior of the to-be-detected pipeline, and the pressure gauge is used for detecting the air pressure in the to-be-detected pipeline; opening the air compressor to introduce gas into the pipeline to be detected; detecting the strength of the pipeline to be detected; the sealing performance of the to-be-detected pipeline is detected; and when the strength and the sealing performance of the to-be-detected pipeline meet the requirements, cleaning the interior of the to-be-detected pipeline. According to the technical scheme provided by the invention, the quality of the pipeline is detected firstly, and then the welding slag of the pipeline is cleaned after the quality of the pipeline meets the requirement, so that the welding slag is prevented from falling into the compressor to influence the normal operation of the compressor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor piping, in particular to a piping pressure test and cleaning process. BACKGROUND

[0002] Most of the compressor inter-piping are pressure piping and the piping cleanliness requirement is very high, the general contractor and the owner require to check the cleanliness of the piping before the installation of the compressor piping, and the installation can be carried out only after the check is qualified.

[0003] The piping may be spliced by multiple sections, and there may be gas leakage, welding slag or oxide skin and other problems at the welding positions. When the piping is connected with the compressor, the welding slag or oxide skin may fall into the interior of the compressor, thus affecting the normal operation of the compressor. SUMMARY

[0004] The main purpose of the present application is to provide a piping pressure test and cleaning process, which aims to prevent the welding slag or oxide skin from affecting the operation of the compressor.

[0005] To achieve the above purpose, the piping pressure test and cleaning process provided by the present application is used for detecting and cleaning the piping, and comprises the following steps: providing two blind plates, an air compressor and a pressure gauge, the two blind plates are respectively installed at the gas inlet and gas outlet of the piping to be detected, the air compressor is in communication with the interior of the piping to be detected, and the pressure gauge is used for detecting the air pressure in the interior of the piping to be detected; turning on the air compressor to introduce gas into the interior of the piping to be detected; detecting the strength of the piping to be detected; detecting the sealing property of the piping to be detected; and cleaning the interior of the piping to be detected when the strength and sealing property of the piping to be detected both meet the requirements.

[0006] In an embodiment, the step of detecting the strength of the piping to be detected comprises:

[0007] According to the type of the piping to be detected, the air pressure in the interior of the piping to be detected is adjusted to the corresponding detection parameter by the air compressor.

[0008] When the piping to be detected is damaged, the piping to be detected is repaired and the step of providing the two blind plates, the air compressor and the pressure gauge, the two blind plates being respectively installed at the gas inlet and gas outlet of the piping to be detected, the air compressor being in communication with the interior of the piping to be detected, and the pressure gauge being used for detecting the air pressure in the interior of the piping to be detected is returned to.

[0009] When the piping to be detected is not damaged, it is determined that the strength of the piping to be detected meets the requirements.

[0010] In an embodiment, the step of adjusting the air pressure inside the pipeline to be detected to the corresponding detection parameter by the air compressor according to the type of the pipeline to be detected comprises:

[0011] When the pipeline to be detected is a metal pipeline, the air pressure inside the metal pipeline is adjusted to A by the air compressor, A is 1.15 times the design pressure;

[0012] When the pipeline to be detected is a vacuum pipeline, the air pressure inside the metal pipeline is adjusted to B by the air compressor, B is 0.20 MPa.

[0013] In an embodiment, the step of detecting the tightness of the pipeline to be detected comprises:

[0014] A foaming agent is arranged at the welding position of the pipeline to be detected;

[0015] The air inside the pipeline to be detected is adjusted by the air compressor;

[0016] Whether the tightness of the pipeline to be detected meets the requirements is determined by observing whether bubbles are generated in the foaming agent.

[0017] In an embodiment, the step of determining whether the tightness of the pipeline to be detected meets the requirements by observing whether bubbles are generated in the foaming agent comprises:

[0018] When no bubbles are generated in the foaming agent, it is determined that the tightness of the pipeline to be detected meets the requirements;

[0019] When bubbles are generated in the foaming agent, it is determined that the tightness of the pipeline to be detected does not meet the requirements, the inside of the pipeline to be detected is depressurized, the pipeline to be detected is repaired, and the step of “providing two blind plates, an air compressor and a pressure gauge, the two blind plates are respectively arranged at the air inlet and air outlet of the pipeline to be detected, the air compressor is in communication with the inside of the pipeline to be detected, and the pressure gauge is used to detect the air pressure inside the pipeline to be detected” is returned.

[0020] In an embodiment, the step of adjusting the air inside the pipeline to be detected by the air compressor comprises:

[0021] The air pressure inside the pipeline to be detected is adjusted to 50% of the preset air pressure by the air compressor;

[0022] The air pressure inside the pipeline to be detected is increased by 10% of the preset air pressure each time by the air compressor, and the pressure is stabilized for 3 minutes;

[0023] The air pressure inside the pipeline to be detected is increased to the preset air pressure by the air compressor, and the pressure is stabilized for 10 minutes;

[0024] The air pressure in the pipeline to be detected is reduced to the design air pressure by the air compressor.

[0025] In an embodiment, when the strength and sealing performance of the pipeline to be detected meet the requirements, the step of cleaning the inside of the pipeline to be detected comprises:

[0026] When the nominal diameter of the pipeline to be detected is greater than 500 mm and no filter is arranged inside the pipeline to be detected, a manhole is arranged on the side wall of the pipeline to be detected for a person to enter the inside of the pipeline to be detected for cleaning.

[0027] After the inside of the pipeline to be detected is cleaned by a person, a blind flange is installed at the manhole to block the manhole.

[0028] In an embodiment, when the strength and sealing performance of the pipeline to be detected meet the requirements, the step of cleaning the inside of the pipeline to be detected comprises:

[0029] When the nominal diameter of the pipeline to be detected is less than or equal to 500 mm and no filter is arranged inside the pipeline to be detected, the blind plate installed on the pipeline to be detected is removed, the air compressor is installed at the air inlet of the pipeline to be detected and blows air into the air inlet, and the air speed is greater than 20 m / s.

[0030] In an embodiment, when the strength and sealing performance of the pipeline to be detected meet the requirements, the step of cleaning the inside of the pipeline to be detected comprises:

[0031] When a filter is arranged inside the pipeline to be detected, the blind plate installed on the pipeline to be detected is removed.

[0032] The air outlet of the pipeline to be detected is provided with barley paper, and the air inlet of the pipeline to be detected is pressurized to break the barley paper.

[0033] In an embodiment, when the strength and sealing performance of the pipeline to be detected meet the requirements, the step of cleaning the inside of the pipeline to be detected comprises:

[0034] When the pipeline to be detected extends in the up-down direction.

[0035] An endoscope for observing the inside of the pipeline to be detected and a hammer for knocking the outside of the pipeline to be detected are provided.

[0036] The technical scheme of the present application detects the quality of the pipeline first, and then cleans the welding slag of the pipeline when the quality of the pipeline meets the requirements, so as to avoid that the welding slag falls into the inside of the compressor and affects the normal operation of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without any creative effort.

[0038] Figure 1 The flowchart of the first embodiment of the pipeline pressure test cleaning process of the present application is shown in the figure.

[0039] Figure 2 The flowchart of the second embodiment of the pipeline pressure test cleaning process of the present application is shown in the figure.

[0040] Figure 3 The flowchart of the third embodiment of the pipeline pressure test cleaning process of the present application is shown in the figure.

[0041] Figure 4 The flowchart of the fourth embodiment of the pipeline pressure test cleaning process of the present application is shown in the figure.

[0042] Figure 5 The flowchart of the fifth embodiment of the pipeline pressure test cleaning process of the present application is shown in the figure.

[0043] Figure 6 The flowchart of the sixth embodiment of the pipeline pressure test cleaning process of the present application is shown in the figure.

[0044] Figure 7 The flowchart of the seventh embodiment of the pipeline pressure test cleaning process of the present application is shown in the figure.

[0045] Figure 8 The flowchart of the eighth embodiment of the pipeline pressure test cleaning process of the present application is shown in the figure.

[0046] Figure 9 The flowchart of the ninth embodiment of the pipeline pressure test cleaning process of the present application is shown in the figure.

[0047] Figure 10 The flowchart of the tenth embodiment of the pipeline pressure test cleaning process of the present application is shown in the figure.

[0048] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0049] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of the present application.

[0050] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0051] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel solutions are included, for example, "A and / or B" includes A solution, or B solution, or A and B solutions. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0052] Most of the compressor inter-pipe pipes are pressure pipes, and the pipe cleanliness requirement is very high. The general contractor and the owner require that the pipe cleanliness be checked before the compressor pipe installation, and the installation can be carried out only after the check is qualified. The pipe may be spliced by multiple sections, and there may be gas leakage, welding slag or oxide skin and other problems at the welding positions. When the pipe is connected with the compressor, the welding slag or oxide skin may fall into the interior of the compressor, thereby affecting the normal operation of the compressor.

[0053] The present application provides a pipeline pressure test cleaning process, which refers to Figure 1 , Figure 1 The present application provides a pipeline pressure test cleaning process, which refers to

[0054] Step S10: providing two blind plates, an air compressor and a pressure gauge, the two blind plates are respectively installed at the gas inlet and the gas outlet of the to-be-detected pipeline, the air compressor is in communication with the interior of the to-be-detected pipeline, and the pressure gauge is used for detecting the internal gas pressure of the to-be-detected pipeline.

[0055] Step S20: opening the air compressor to the inside of the pipeline to be detected;

[0056] Step S30: detecting the strength of the pipeline to be detected;

[0057] Step S40: detecting the sealing property of the pipeline to be detected;

[0058] Step S50: when the strength and sealing property of the pipeline to be detected meet the requirements, cleaning the inside of the pipeline to be detected.

[0059] Before the pipeline is installed on the compressor, the pipeline needs to be detected to check whether the strength meets the requirements and whether there is leakage. When the strength and air tightness meet the requirements, the pipeline can be connected with the compressor. In order to prevent the welding slag at the welding position of the pipeline from falling into the inside of the compressor, the welding position needs to be cleaned. In order to perform the strength detection, air tightness detection, slag cleaning, and scale removal, two blind plates, an air compressor, and a pressure gauge are provided. The two blind plates are respectively installed at the gas inlet and gas outlet of the pipeline to be detected, so that a closed space is formed in the inside of the pipeline. The air compressor is connected with the inside of the pipeline to be detected. The pipeline of the air compressor can pass through the blind plate and be connected with the inside of the pipeline to be detected, so that the inside of the pipeline to be detected is pressurized. The pressure gauge is used to detect the air pressure in the inside of the pipeline to be detected. The air compressor is started and stopped by observing the pressure gauge. When the air pressure in the inside of the pipeline to be detected reaches a certain degree, the strength and air tightness of the pipeline to be detected are detected. When the strength and sealing property of the pipeline to be detected meet the requirements, it is determined that the pipeline to be detected can be connected with the compressor. At this time, it is necessary to clean the inside of the pipeline to be detected.

[0060] Since there are multiple pipelines connected with the compressor, the materials and uses of different pipelines are different, and the use scenes are different, the strength test requirements of the pipelines are different. The present application provides a pipeline pressure test and cleaning process. Figure 2 , Figure 2 FIG. 2 is a flowchart of a second embodiment of the pipeline pressure test and cleaning process of the present application.

[0061] Step S30 includes the following steps:

[0062] Step S31: according to the type of the pipeline to be detected, the air pressure in the inside of the pipeline to be detected is adjusted to the corresponding detection parameter by the air compressor.

[0063] Step S32: when the to-be-tested pipeline is damaged, repairing the to-be-tested pipeline, and returning to the step of "providing two blind plates, an air compressor and a pressure gauge, the two blind plates are respectively arranged at the air inlet and air outlet of the to-be-tested pipeline, the air compressor is communicated with the inside of the to-be-tested pipeline, and the pressure gauge is used for detecting the air pressure in the to-be-tested pipeline";

[0064] Step S33: when the to-be-tested pipeline is not damaged, determining that the strength of the to-be-tested pipeline meets the requirement.

[0065] After the inside of the to-be-tested pipeline is pressurized, if the to-be-tested pipeline is not disconnected at the connection and the pipe wall is not damaged, it indicates that the strength of the to-be-tested pipeline meets the requirement. At this time, the next step of the air tightness test can be performed. If the to-be-tested pipeline is disconnected at the connection and the pipe wall is damaged, the damaged pipeline during the strength test needs to be repaired or a new pipeline is replaced to retest the strength.

[0066] The pipeline includes a metal pipeline and a vacuum pipeline, and different pipelines are tested in different ways due to different testing pressures of pipelines with different materials and purposes.

[0067] The present application provides a pipeline pressure test and cleaning process, referring to Figure 3 , Figure 3 The present application provides a pipeline pressure test and cleaning process, referring to

[0068] Step S31 includes the following steps:

[0069] Step S311: when the to-be-tested pipeline is a metal pipeline, the air pressure in the metal pipeline is adjusted to A by the air compressor, and A is 1.15 times the design pressure;

[0070] Step S312: when the to-be-tested pipeline is a vacuum pipeline, the air pressure in the metal pipeline is adjusted to B by the air compressor, and B is 0.20 MPa.

[0071] Generally, the air pressure in the pipeline will fluctuate during the operation of the compressor. Sometimes, the air pressure is large. In order to ensure that the pipeline can withstand the influence of the peak value of the air pressure, the test pressure is 1.15 times the design pressure during the test. For the pipeline used in the vacuum environment, the test pressure is generally 0.20 MPa. In addition, if the pipeline is a metal pipeline and a vacuum pipeline, the larger test pressure is used for testing.

[0072] In order to perform the sealing test, it is convenient to observe the air tightness of the pipeline. The present application provides a pipeline pressure test and cleaning process, referring to Figure 4 , Figure 4 The present application provides a pipeline pressure test and cleaning process, referring to

[0073] Step S40 comprises the following steps:

[0074] Step S41: setting a foaming agent at the welding position of the pipeline to be detected;

[0075] Step S42: adjusting the gas in the pipeline to be detected by the air compressor;

[0076] Step S43: determining whether the pipeline to be detected meets the requirements of air tightness by observing whether bubbles are generated in the foaming agent.

[0077] By whether bubbles are generated in the foaming agent, it can be determined whether the pipeline is air-tight, and thus the air tightness can be determined by eyes. In addition, it can also be determined by whether the pressure indicator number in the pipeline changes.

[0078] The present application provides a pipeline pressure test cleaning process, referring to Figure 5 , Figure 5 The present application provides a pipeline pressure test cleaning process, referring to

[0079] Step S43 comprises the following steps:

[0080] Step S431: when no bubbles are generated in the foaming agent, determining that the pipeline to be detected meets the requirements of air tightness;

[0081] Step S432: when bubbles are generated in the foaming agent, determining that the pipeline to be detected does not meet the requirements of air tightness, depressurizing the inside of the pipeline to be detected, repairing the pipeline to be detected, and returning to the step of "providing two blind plates, an air compressor and a pressure gauge, the two blind plates are respectively installed at the gas inlet and gas outlet of the pipeline to be detected, the air compressor is in communication with the inside of the pipeline to be detected, and the pressure gauge is used to detect the air pressure in the pipeline to be detected".

[0082] When no bubbles are generated in the foaming agent, it means that the pipeline does not have air leakage, and the quality of the pipeline is good. The inside of the pipeline can be cleaned, and after cleaning, the pipeline can be connected with the compressor. When bubbles are generated in the foaming agent, it means that the pipeline is damaged or the welding position is not welded well, and the pipeline needs to be repaired or replaced. The repaired or replaced pipeline needs to be tested again for strength and air tightness.

[0083] Since the pipeline may have quality problems, if the air pressure is directly increased to the preset air pressure, the pipeline will suddenly be under a large air pressure, which will cause the air leakage part of the pipeline to be damaged more, and increase the strength of the pipeline repair.

[0084] The present application provides a pipeline pressure test cleaning process, referring to Figure 6 ,Figure 6 A flowchart of a sixth embodiment of the pipeline pressure test cleaning process of the present application is shown.

[0085] Step S42 includes the following steps:

[0086] Step S421: Adjust the air pressure in the pipeline to be detected to 50% of the preset air pressure by the air compressor;

[0087] Step S422: Increase the air pressure in the pipeline to be detected by 10% of the preset air pressure each time, and stabilize for 3 minutes;

[0088] Step S423: Increase the air pressure in the pipeline to be detected to the preset air pressure by the air compressor, and stabilize for 10 minutes;

[0089] Step S424: Decrease the air pressure in the pipeline to be detected to the design air pressure by the air compressor.

[0090] First, increase the air pressure to 50% of the preset air pressure, then increase the air pressure by 10% of the preset air pressure each time, and stabilize for 3 minutes. During the stabilization, observe whether bubbles are generated in the foaming agent, or use a pressure gauge to understand whether the air pressure inside the pipeline changes before and after stabilization. During the stabilization process, the temperature and pressure inside the pipeline will gradually stabilize. Only after the temperature and pressure stabilize can accurate leak detection be performed. If the pressure is directly increased to the preset air pressure without stabilization, it may cause excessive impact on the pipeline, resulting in structural damage or rupture. Therefore, the setting of the stabilization time can avoid sudden damage caused by sudden pressure rise.

[0091] When the pipe diameter is large, a gas pressure pump plus a booster device cannot generate a large enough high-pressure gas flow to flush the scale and welding slag in the large pipe diameter pipeline.

[0092] The present application proposes a pipeline pressure test cleaning process, referring to Figure 7 , Figure 7 A flowchart of a seventh embodiment of the pipeline pressure test cleaning process of the present application is shown.

[0093] Step S50 includes the following steps:

[0094] Step S51: When the nominal diameter of the pipeline to be detected is greater than 500 mm and no filter is arranged inside the pipeline to be detected, a manhole is formed in the side wall of the pipeline to be detected for a person to enter the inside of the pipeline to be detected for cleaning;

[0095] Step S52: After the inside of the pipeline to be detected is cleaned by a person, a blind flange is installed at the manhole to block the manhole.

[0096] In order to effectively clean the oxide skin and welding slag inside the large-diameter pipeline, a manhole is arranged on the pipeline, so that the worker can enter the pipeline to clean it. Since there is no filter inside the pipeline, the worker can clean all parts of the pipeline. In addition, the pipeline has an air inlet and an air outlet, and the worker can enter the pipeline through the air inlet or the air outlet. Since the pipeline does not extend in a straight line, it may be bent in several sections. In order to clean each bent section of the pipeline, a manhole is arranged on the pipeline to allow the worker to directly enter the inside of the bent section.

[0097] When the pipe diameter of the pipeline to be detected is small, the worker cannot enter the inside of the pipeline.

[0098] The present application provides a pipeline pressure test cleaning process, referring to Figure 8 , Figure 8 The present application provides a pipeline pressure test cleaning process, referring to ,

[0099] Step S50 includes the following steps:

[0100] Step S53: When the nominal diameter of the pipeline to be detected is less than or equal to 500 mm and no filter is arranged inside the pipeline to be detected, remove the blind plate installed on the pipeline to be detected, install the air compressor on the air inlet of the pipeline to be detected and blow air into the air inlet, and the air speed is greater than 20 m / s.

[0101] When the pipe diameter is small and there is no filter inside, the inside of the pipeline can be cleaned by the blowing device.

[0102] When there is a filter inside the pipeline, the high-pressure airflow generated by the air compressor + booster will be greatly attenuated when passing through the filter, and the pipeline inside the filter cannot be cleaned.

[0103] The present application provides a pipeline pressure test cleaning process, referring to Figure 9 , Figure 9 The present application provides a pipeline pressure test cleaning process, referring to ,

[0104] Step S50 includes the following steps:

[0105] Step S54: When a filter is arranged inside the pipeline to be detected, remove the blind plate installed on the pipeline to be detected;

[0106] Step S55: The air outlet of the pipeline to be detected is provided with barley paper, and the air inlet of the pipeline to be detected is pressurized to break the barley paper.

[0107] The air inlet of the pipeline to be detected is pressurized to break the paper, and the high-speed airflow generated by the explosion is used to clean the inside of the detection pipeline. The strength of the high-speed airflow is attenuated when passing through the filter, but it is still sufficient to clean the oxide skin and welding slag. Generally, the thickness of the paper is 3 mm, and the air pressure of the air inlet is 3-5 MPa.

[0108] When the nominal diameter of the pipeline to be detected is greater than 500 mm and extends in the vertical direction, the staff cannot enter the inside of the pipeline (cannot stand), so another cleaning method is needed.

[0109] The present application provides a pipeline pressure test cleaning process, referring to Figure 10 , Figure 10 The flowchart of the tenth embodiment of the pipeline pressure test cleaning process of the present application is shown.

[0110] Step S50 includes the following steps:

[0111] Step S56: When the pipeline to be detected extends in the up-down direction,

[0112] Step S57: Provide an endoscope and a hammer, the endoscope is used to observe the inside of the pipeline to be detected, and the hammer is used to knock the outside of the pipeline to be detected.

[0113] By knocking the outside of the pipeline to be detected, the oxide skin and welding slag on the inside of the pipeline to be detected are shaken off, achieving cleaning.

[0114] The above is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or direct / indirect application in other related technical fields within the technical concept of the present application, including the contents of the present application specification and drawings, are included in the patent protection scope of the present application.

Claims

1. A pigging process for testing and cleaning a pipeline, characterized in that, The pipeline pressure test cleaning process comprises the following steps: Providing two blind plates, an air compressor and a pressure gauge, the two blind plates are respectively installed at the gas inlet and outlet of the pipeline to be detected, the air compressor is in communication with the inside of the pipeline to be detected, and the pressure gauge is used to detect the air pressure inside the pipeline to be detected; Turning on the air compressor to introduce gas into the inside of the pipeline to be detected; Detecting the strength of the pipeline to be detected; Detecting the sealing property of the pipeline to be detected; When the strength and sealing property of the pipeline to be detected meet the requirements, cleaning the inside of the pipeline to be detected.

2. The pigging process of claim 1, wherein, The step of detecting the strength of the pipeline to be detected comprises: According to the type of the pipeline to be detected, adjusting the air pressure inside the pipeline to be detected to the corresponding detection parameter by the air compressor; When the pipeline to be detected is damaged, repairing the pipeline to be detected and returning to the step of providing two blind plates, an air compressor and a pressure gauge, the two blind plates are respectively installed at the gas inlet and outlet of the pipeline to be detected, the air compressor is in communication with the inside of the pipeline to be detected, and the pressure gauge is used to detect the air pressure inside the pipeline to be detected; When the pipeline to be detected is not damaged, determining that the strength of the pipeline to be detected meets the requirements.

3. The pigging process of claim 2, wherein the pipeline comprises metal pipelines and vacuum pipelines. The step of adjusting the air pressure inside the pipeline to be detected to the corresponding detection parameter by the air compressor according to the type of the pipeline to be detected comprises: When the pipeline to be detected is a metal pipeline, adjusting the air pressure inside the metal pipeline to A by the air compressor, A is 1.15 times of the design pressure; When the pipeline to be detected is a vacuum pipeline, adjusting the air pressure inside the metal pipeline to B by the air compressor, B is 0.20 MPa.

4. The pipe hydrostatic pressure testing and cleaning process of claim 1 wherein, The step of detecting the sealing property of the pipeline to be detected comprises: Providing a foaming agent at the welding position of the pipeline to be detected; Adjusting the gas inside the pipeline to be detected by the air compressor; Determining whether the air tightness of the pipeline to be detected meets the requirements by observing whether bubbles are generated in the foaming agent.

5. The pigging process of claim 4, wherein, The step of determining whether the air tightness of the pipeline to be detected meets the requirements by observing whether bubbles are generated in the foaming agent comprises: When no bubbles are generated in the foaming agent, determining that the air tightness of the pipeline to be detected meets the requirements; When bubbles are generated in the foaming agent, determining that the air tightness of the pipeline to be detected does not meet the requirements, releasing the pressure inside the pipeline to be detected, repairing the pipeline to be detected, and returning to the step of providing two blind plates, an air compressor and a pressure gauge, the two blind plates are respectively installed at the gas inlet and outlet of the pipeline to be detected, the air compressor is in communication with the inside of the pipeline to be detected, and the pressure gauge is used to detect the air pressure inside the pipeline to be detected.

6. The pipe hydrostatic pressure testing and cleaning process as defined in claim 4 wherein, The step of adjusting the gas inside the pipeline to be detected by the air compressor comprises: Adjusting the air pressure inside the pipeline to be detected to 50% of the preset air pressure by the air compressor; Increasing the air pressure inside the pipeline to be detected by 10% of the preset air pressure each time by the air compressor, and stabilizing the pressure for 3 minutes. Lifting the air pressure in the pipeline to be detected to the preset air pressure by the air compressor, and stabilizing the pressure for 10 minutes; Lifting the air pressure in the pipeline to be detected to the preset air pressure by the air compressor, and stabilizing the pressure for 10 minutes; 7. The pipe hydrostatic pressure testing and cleaning process as defined in claim 1 wherein, When the strength and sealing property of the pipeline to be detected meet the requirements, the step of cleaning the inside of the pipeline to be detected comprises: When the nominal diameter of the pipeline to be detected is greater than 500 mm and no filter is arranged inside the pipeline to be detected, a manhole is arranged on the side wall of the pipeline to be detected for a person to enter the inside of the pipeline to be detected for cleaning; After the inside of the pipeline to be detected is cleaned by a person, a blind flange is installed at the manhole to block the manhole.

8. The pipe hydrostatic pressure testing and cleaning process as defined in claim 1 wherein, When the strength and sealing property of the pipeline to be detected meet the requirements, the step of cleaning the inside of the pipeline to be detected comprises: When the nominal diameter of the pipeline to be detected is less than or equal to 500 mm and no filter is arranged inside the pipeline to be detected, the blind plate installed on the pipeline to be detected is removed, the air compressor is installed at the air inlet of the pipeline to be detected and blows air into the air inlet, and the air speed is greater than 20 m / s.

9. The pipe hydrostatic pressure testing and cleaning process as defined in claim 1 wherein, When the strength and sealing property of the pipeline to be detected meet the requirements, the step of cleaning the inside of the pipeline to be detected comprises: When a filter is arranged inside the pipeline to be detected, the blind plate installed on the pipeline to be detected is removed; The air outlet of the pipeline to be detected is provided with barley paper, and the air inlet of the pipeline to be detected is pressurized to break the barley paper.

10. The pipe hydrostatic pressure testing and cleaning process as defined in claim 1 wherein, When the strength and sealing property of the pipeline to be detected meet the requirements, the step of cleaning the inside of the pipeline to be detected comprises: When the pipeline to be detected extends in the up-down direction; An endoscope for observing the inside of the pipeline to be detected and a hammer for knocking the outside of the pipeline to be detected are provided.

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