Intelligent industrial pipeline grade judgment method and system based on expert logic mode

Abstract

The invention discloses an intelligent industrial pipeline grade judgment method and system based on an expert logic mode, and belongs to the field of industrial pipeline safety supervision. The method comprises the following steps: constructing a medium library containing various characteristic tags and key parameters of a medium; receiving user input parameters; performing preliminary judgment based on the input parameters, if the input parameters do not accord with a supervision threshold, directly judging that supervision is not needed, otherwise, entering a medium characteristic judgment process; sequentially and independently judging acute toxicity, inflammability, corrosivity, explosiveness and liquefied gas according to expert logic rules, and respectively outputting GC1, GC2 or an intermediate result which does not need to be supervised; and finally, summarizing each intermediate result, and outputting the highest grade as the final grade of the industrial pipeline according to the priority that GC1 > GC2 > does not need to be supervised, so as to solve the problems that new and old specifications are difficult to join, the judgment process is tedious, the intelligent degree is insufficient and the like.

Description

Technical Field

[0001] This invention relates to the field of industrial pipeline safety supervision technology, and more specifically to an intelligent industrial pipeline level determination method and system based on expert logic model. Background Technology

[0002] Industrial pipelines are widely used in petrochemical, energy and other fields, and their safety supervision is of paramount importance. Currently, the classification of industrial pipelines is mainly based on standards such as the "Special Equipment Catalog" and "Pressure Piping Specification for Industrial Pipelines" (GB / T20801-2020). This is done manually by consulting multiple specifications and gradually analyzing the characteristics of the medium and pipeline parameters, which is inefficient, prone to errors, and has a high professional threshold.

[0003] Although some attempts have been made to achieve intelligent classification, such as the intelligent industrial pipeline classification system and method disclosed in application number 202410986993.8, there are significant differences between the old standard GB / T20801-2020 and the new standard "Technical Specification for Safety of Industrial Pipelines" (TSG31-2025), which will be implemented on January 1, 2026, in terms of classification, definition of media characteristics, and judgment logic. For example, the old method classifies industrial pipelines into four levels: GC1, GC2, GC3, and no supervision required, while the new standard only classifies them into three levels: GC1, GC2, and no supervision required. The definitions and classification criteria for acutely toxic, flammable, and corrosive media in the old method also differ from those in the new standard. In addition, the old method still relies on manual calibration or simple conditional judgment in the identification of media phase and liquefied gas state, which is not scientific and accurate enough.

[0004] Therefore, how to achieve efficient, accurate, and intelligent industrial pipeline classification after the implementation of the new standards has become an urgent problem to be solved in this field. Summary of the Invention

[0005] In view of this, the present invention provides an intelligent industrial pipeline grade determination method and system based on expert logic mode to solve problems such as difficulty in connecting old and new standards, cumbersome determination process, and insufficient level of intelligence.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An intelligent industrial pipeline classification method based on expert logic models includes: A media library is constructed, and characteristic labels are set for each media. The characteristic labels include acute toxicity category, flammability category, corrosiveness label, explosiveness label, vapor label, oxygen label, liquefied gas label, as well as the boiling point temperature, critical temperature, flash point, lower explosive limit and upper explosive limit of the media. Receive user-inputted industrial pipeline usage parameters, which include medium name, nominal diameter, maximum working pressure, design pressure, maximum working temperature, and design temperature; Based on the initial assessment of industrial pipeline usage parameters, if the maximum working pressure is <0.1MPa or the nominal diameter is <50mm, it is determined that no supervision is required; otherwise, the process proceeds to the medium characteristics assessment, including: Acute toxicity, flammability, corrosivity, explosiveness, and liquefied gas are assessed separately. Each assessment process is based on the characteristic tags in the media library and the usage parameters, and outputs intermediate results of industrial pipeline grade GC1, industrial pipeline grade GC2, or no supervision required according to expert logic rules. The intermediate results are summarized, and the highest priority level is output as the final level of the industrial pipeline, according to the order of priority: Industrial Pipeline Level GC1 > Industrial Pipeline Level GC2 > No Regulation Required.

[0007] Furthermore, the acute toxicity assessment process includes: If the acute toxicity of the medium is Category 1, then output Industrial Pipeline Class GC1; If the acute toxicity of the medium is Category 2 and the maximum operating temperature is ≥ the boiling point temperature of the medium, then the output industrial pipeline class GC1 is applied. If the maximum operating temperature is less than the boiling point temperature of the medium, then when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃, the output will be GC1 for industrial pipelines; otherwise, the output will be GC2 for industrial pipelines. If the acute toxicity of the medium is Category 3, then the output should be Industrial Pipeline Class GC1 when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, the output should be Industrial Pipeline Class GC2.

[0008] Furthermore, the flammability determination process includes: First, determine the relationship between the maximum operating temperature and the boiling point temperature of the medium; When the maximum operating temperature is greater than or equal to the boiling point temperature of the medium, if the flammability of the medium is Category 1, Category 2 or chemically unstable gas, and the design pressure is greater than or equal to 4 MPa, then the output should be GC1 for industrial pipelines; otherwise, when P is greater than or equal to 10 MPa or the design pressure is greater than or equal to 4 MPa and the design temperature is greater than or equal to 400℃, the output should be GC2 for industrial pipelines. When the maximum operating temperature is less than the boiling point of the medium, if the flammability of the medium is category 1 or category 2 and the design pressure is ≥4MPa, then the industrial pipeline rating GC1 is output; otherwise, the rating is determined for category 3 or category 4, and the corresponding rating is output based on the comparison between the flash point and the maximum operating temperature and the pressure-temperature conditions.

[0009] Furthermore, the explosiveness determination process includes: If the medium LEL < 10% or UEL - LEL ≥ 20%, then when the design pressure is ≥ 10MPa or the design pressure is ≥ 4MPa and the design temperature is ≥ 400℃, the output will be GC1 for industrial pipelines; otherwise, the output will be GC2. If the above-mentioned explosive conditions are not met, then when the maximum working temperature is greater than or equal to the boiling point temperature of the medium, the pipeline with a maximum working pressure greater than or equal to 1.6 MPa shall be output as industrial pipeline grade GC1 or industrial pipeline grade GC2 according to the pressure-temperature condition; the pipeline with a maximum working pressure less than 1.6 MPa and a nominal diameter greater than or equal to 150 mm shall be output as industrial pipeline grade GC1; otherwise, no supervision is required.

[0010] Furthermore, the liquefied gas determination process includes: If the medium is steam or oxygen, output GC1 when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, output industrial pipeline grade GC2. If the medium is liquefied gas and the maximum operating temperature is less than the critical temperature, then the output should be GC1 for industrial pipelines when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, the output should be GC2 for industrial pipelines.

[0011] An intelligent industrial pipeline classification system based on expert logic models includes: Construction Module: Constructs a media library and sets characteristic labels for each media. The characteristic labels include acute toxicity category, flammability category, corrosiveness label, explosiveness label, vapor label, oxygen label, liquefied gas label, as well as the boiling point temperature, critical temperature, flash point, lower explosive limit, and upper explosive limit of the media. Receiving module: Receives industrial pipeline usage parameters input by the user, including medium name, nominal diameter, maximum working pressure, design pressure, maximum working temperature, and design temperature; Preliminary Judgment Module: Based on the industrial pipeline's operating parameters, a preliminary judgment is made. If the maximum working pressure is <0.1MPa or the nominal diameter is <50mm, it is determined that no supervision is required; otherwise, the process proceeds to the media characteristic judgment unit, including: The acute toxicity assessment subunit, flammability assessment subunit, corrosivity assessment subunit, explosiveness assessment subunit, and liquefied gas subunit perform acute toxicity assessment, flammability assessment, corrosivity assessment, explosiveness assessment, and liquefied gas assessment, respectively. Each assessment process is based on the characteristic tags in the media library and the usage parameters, and outputs intermediate results of industrial pipeline level GC1, industrial pipeline level GC2, or no supervision required according to expert logic rules. Final judgment module: Summarize the intermediate results and output the highest level as the final level of the industrial pipeline according to the priority of industrial pipeline level GC1 > industrial pipeline level GC2 > no supervision required.

[0012] Furthermore, the acute toxicity assessment subunit assessment process includes: If the acute toxicity of the medium is Category 1, then output Industrial Pipeline Class GC1; If the acute toxicity of the medium is Category 2 and the maximum operating temperature is ≥ the boiling point temperature of the medium, then the output industrial pipeline class GC1 is applied. If the maximum operating temperature is less than the boiling point temperature of the medium, then when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃, the output will be GC1 for industrial pipelines; otherwise, the output will be GC2 for industrial pipelines. If the acute toxicity of the medium is Category 3, then the output should be Industrial Pipeline Class GC1 when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, the output should be Industrial Pipeline Class GC2.

[0013] Furthermore, the flammability determination subunit's determination process includes: First, determine the relationship between the maximum operating temperature and the boiling point temperature of the medium; When the maximum operating temperature is greater than or equal to the boiling point temperature of the medium, if the flammability of the medium is Category 1, Category 2 or chemically unstable gas, and the design pressure is greater than or equal to 4 MPa, then the output should be GC1 for industrial pipelines; otherwise, when P is greater than or equal to 10 MPa or the design pressure is greater than or equal to 4 MPa and the design temperature is greater than or equal to 400℃, the output should be GC2 for industrial pipelines. When the maximum operating temperature is less than the boiling point of the medium, if the flammability of the medium is category 1 or category 2 and the design pressure is ≥4MPa, then the industrial pipeline rating GC1 is output; otherwise, the rating is determined for category 3 or category 4, and the corresponding rating is output based on the comparison between the flash point and the maximum operating temperature and the pressure-temperature conditions.

[0014] Furthermore, the explosiveness determination subunit's determination process includes: If the medium LEL < 10% or UEL - LEL ≥ 20%, then when the design pressure is ≥ 10MPa or the design pressure is ≥ 4MPa and the design temperature is ≥ 400℃, the output will be GC1 for industrial pipelines; otherwise, the output will be GC2. If the above-mentioned explosive conditions are not met, then when the maximum working temperature is greater than or equal to the boiling point temperature of the medium, the pipeline with a maximum working pressure greater than or equal to 1.6 MPa shall be output as industrial pipeline grade GC1 or industrial pipeline grade GC2 according to the pressure-temperature condition; the pipeline with a maximum working pressure less than 1.6 MPa and a nominal diameter greater than or equal to 150 mm shall be output as industrial pipeline grade GC1; otherwise, no supervision is required.

[0015] Furthermore, the liquefied gas subunit judgment process includes: If the medium is steam or oxygen, output GC1 when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, output industrial pipeline grade GC2. If the medium is liquefied gas and the maximum operating temperature is less than the critical temperature, then the output should be GC1 for industrial pipelines when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, the output should be GC2 for industrial pipelines.

[0016] As can be seen from the above technical solution, compared with the prior art, the present invention provides an intelligent industrial pipeline grade determination method and system based on expert logic model, with the following specific beneficial effects: (1) The judgment logic is constructed based on the new standard, which solves the applicability problem during the transition period between the old and new standards.

[0017] (2) By introducing boiling point temperature (t~s~) and critical temperature (T~c~) to dynamically determine the phase state of the medium and the state of liquefied gas, it is more scientific and closer to actual working conditions than the method of relying on static calibration or simple condition judgment in the previous application.

[0018] (3) Users only need to input a few parameters, and the system will automatically call the media library and perform complex logic judgments, which greatly reduces the amount of manual work and improves the efficiency and consistency of judgment.

[0019] (4) The media library can be expanded as standards are updated, and the system logic is easy to maintain and upgrade. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the method flow provided by the present invention; Figure 2 The logic diagram for determining the grade of industrial pipelines provided by this invention; Figure 3 A preliminary judgment logic diagram provided for this invention; Figure 4 The acute toxicity logic diagram provided for this invention; Figure 5 The flammability logic diagram provided by this invention; Figure 6A logic diagram of liquefied gas provided for this invention; Figure 7 The following is a flowchart of the logic for determining the -196℃ nitrogen pipeline provided by this invention; Figure 8 The present invention provides a logic flowchart for determining the 100℃ nitrogen pipeline. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: See Figure 1 Embodiment 1 of this invention discloses an intelligent industrial pipeline grade determination method based on expert logic model, comprising: A media library is constructed, and characteristic labels are set for each media. The characteristic labels include acute toxicity category, flammability category, corrosiveness label, explosiveness label, vapor label, oxygen label, liquefied gas label, as well as the boiling point temperature, critical temperature, flash point, lower explosive limit and upper explosive limit of the media. Receive user-inputted industrial pipeline usage parameters, which include medium name, nominal diameter, maximum working pressure, design pressure, maximum working temperature, and design temperature; Based on the initial assessment of industrial pipeline usage parameters, if the maximum working pressure is <0.1MPa or the nominal diameter is <50mm, it is determined that no supervision is required; otherwise, the process proceeds to the medium characteristics assessment, including: Acute toxicity, flammability, corrosivity, explosiveness, and liquefied gas are assessed separately. Each assessment process is based on the characteristic tags in the media library and the usage parameters, and outputs intermediate results of industrial pipeline grade GC1, industrial pipeline grade GC2, or no supervision required according to expert logic rules. The intermediate results are summarized, and the highest priority level is output as the final level of the industrial pipeline, according to the order of priority: Industrial Pipeline Level GC1 > Industrial Pipeline Level GC2 > No Regulation Required.

[0024] In one specific embodiment, all media included in the media library are tagged with characteristic labels. These characteristics include acute toxicity (classified into Category 1, Category 2, and Category 3), flammability (gaseous media are classified into Category 1, Category 2, and chemically unstable gas categories A and B; liquid media are classified into Category 1, Category 2, Category 3, and Category 4), corrosivity, explosiveness, vapor, oxygen, and liquefied gases. Furthermore, based on the technical requirements for industrial pipeline classification and referring to the technical conditions in the new pipeline regulations, the included media characteristics also include the boiling point temperature (t). s Critical temperature (T) c ), flash point (t) f This invention provides medium parameters such as the upper explosive limit (UEL) and lower explosive limit (LEL). Users of this invention only need to input the industrial pipeline usage parameters [including medium name, nominal diameter (DN), maximum working pressure (P...]. w Design pressure (P), maximum operating temperature (T) w [There are 6 types of industrial pipeline grades, including design temperature (T)], which can be used to directly obtain the industrial pipeline grade.

[0025] The specific implementation logic is as follows: Figure 2 The logic diagram for determining the industrial pipeline grade is shown below. The gray boxes in the parameter input pool mainly contain the industrial pipeline usage parameters that users need to fill in, including the medium name, nominal diameter (DN), and maximum working pressure (P). w Design pressure (P), maximum operating temperature (T) w ), Design temperature (T); the diamond-shaped boxes represent the system's judgment logic, where the pink diamond indicates that the characteristics of this type of medium have been calibrated in the system's medium library. This parameter is bound to the medium name in this medium database through the medium name, and the system can directly reference and judge it; the blue diamond-shaped boxes represent the basic parameters input by the user and the characteristic data of the medium in the medium library system [such as boiling point temperature (T)]. s ), flash point (t) f Critical temperature (T) c The comparison of [etc.] (explosiveness is determined directly by the upper and lower explosive limits in the media library, with reference to system logic). The media characteristic data is also in this media library and does not need to be queried by the user. The red logic line indicates that the industrial pipeline is classified as GC1, the orange logic line indicates that the industrial pipeline is classified as GC2, and the green logic line indicates that the industrial pipeline is classified as not requiring supervision. In the final result pool, by summarizing no more than 5 judgment results, and following the logic of GC1 > GC2 > not requiring supervision, the maximum value is output as the final level of the industrial pipeline.

[0026] After the industrial pipeline usage parameters are entered, the system will proceed to a preliminary judgment based on the directory. wIndustrial pipelines with a pressure <0.1MPa or DN <50mm are deemed to be industrial pipelines that do not require regulation. When P w When the pressure is ≥0.1MPa and the DN is ≥50mm, the system determines the industrial pipeline grade based on the characteristics of the medium, such as acute toxicity, flammability, corrosiveness, explosiveness, and liquefied gas. Industrial pipelines with acute toxicity of the medium classified as Category 1 are classified as GC1; those with acute toxicity of the medium not falling within Category 1 are classified as Category 2. Industrial pipelines with acute toxicity of the medium classified as Category 2, and T... w ≥t s When, it is determined to be GC1, T w <t s If P≥10MPa, or P≥4MPa and T≥400℃ [hereinafter referred to as "New Pipeline Regulation A1.1 (3) Judgment Conditions"], the industrial pipeline is judged as GC1; otherwise, the industrial pipeline is judged as GC2. If the acute toxicity of the medium is not within the range of Category 2, the judgment logic for acute toxicity of the medium is terminated. If the acute toxicity of the medium is Category 3, the industrial pipeline that meets the judgment conditions of New Pipeline Regulation A1.1 (3) is judged as GC1; otherwise, the industrial pipeline is judged as GC2. If the acute toxicity of the medium is not within the range of Category 3, the judgment logic is terminated. When determining the flammability of a medium, the first step is to perform a T test. w ≥t s Determine whether to place T w ≥t s Industrial pipelines with flammability classified as Category 1, Category 2, or chemically unstable, and with P ≥ 4 MPa, are classified as GC1. If they meet the criteria of the new pipeline regulation A1.1 (3), they are classified as GC1; otherwise, they are classified as GC2. T w <t s Flammability category 1 or 2, and when P ≥ 4 MPa, it is classified as GC1, T w <t s When the flammability of a medium is not within the range of Category 1 or Category 2, it is judged to be classified as Category 3; when T w <t s Industrial pipelines with a flammability category of 3 are classified as GC1 if they meet the judgment criteria of the new pipeline regulation A1.1(3); otherwise, they are classified as GC2. w <t s When the flammability of a medium is not within the range of categories 1, 2, or 3, it is judged to be in category 4 of flammability; when T w <t s Industrial pipes with a flammability category of 4, and T w ≥t f When T meets the judgment conditions of the new pipeline regulation A1.1(3), it is judged as GC1; otherwise, the industrial pipeline is judged as GC2. w <ts Industrial pipes with a flammability category of 4, and T w <t f The logic for determining the end of an industrial pipeline; When the medium is corrosive, the judgment condition that meets the new pipe regulation A1.1 (3) is GC1; otherwise, the industrial pipeline is judged as GC2; the judgment logic ends for industrial pipelines where the medium is not corrosive. Industrial pipelines with a media explosiveness LEL < 10% or UEL-LEL ≥ 20% are classified as GC1 if they meet the judgment conditions of the new pipeline regulation A1.1 (3); otherwise, they are classified as GC2. Industrial pipelines that do not meet the explosiveness LEL < 10% or UEL-LEL ≥ 20% enter the boiling point judgment logic; when T w ≥t s At that time, for P w Industrial pipelines with a pressure ≥1.6MPa are classified as GC1 if they meet the judgment criteria of the new pipeline regulation A1.1(3); otherwise, they are classified as GC2. For P w Industrial pipelines with a pressure of <1.6MPa and industrial pipelines with a DN≥150mm are classified as GC2; otherwise, they are classified as not requiring supervision. When determining the medium of liquefied gas, industrial pipelines whose medium is steam or oxygen are classified as GC1 if they meet the judgment conditions of the new pipeline regulation A1.1(3); otherwise, industrial pipelines are classified as GC2. If the medium is not steam or oxygen, the judgment of critical temperature and boiling point is applied. w <T c Industrial pipelines that meet the judgment conditions of the new pipeline regulation A1.1(3) are classified as GC1; otherwise, they are classified as GC2. liquefied gas media that do not meet the T... w <T c The logic for determining the end of an industrial pipeline.

[0027] Output results: Summarize the above results (no more than 5), and finally output the maximum value in the order of GC1 > GC2 > No supervision required.

[0028] Symbol explanation: Design temperature: T, the set metal temperature of the component (average temperature along the metal cross section of the component) under normal operating conditions, in °C; Maximum operating temperature: T w Under normal operating conditions, the highest metal temperature of the components in the pipeline is ℃; Design pressure: P, the maximum working pressure of the pipeline during operation, in MPa; Maximum working pressure: P w The maximum working pressure of the pipeline during normal operation, in MPa; Nominal diameter: DN, refers to the standardized pipe diameter series, in mm; boiling point temperature of medium: t s The temperature at which the saturated vapor pressure of a liquid equals the external pressure. When this temperature is exceeded, the medium begins to exist in the pipe as a gas-liquid coexistence. (℃) Critical temperature of medium: T c The highest temperature at which the medium exists in liquid form. Above this temperature, the medium exists only in gaseous form in the pipeline. (℃) Medium flash point: t f The lowest temperature at which a mixture of vapor and air on the surface of a flammable liquid can produce a flash fire upon contact with a flame is ℃. Lower Explosive Limit (LEL): The lowest concentration (%) of a flammable gas, vapor, or dust mixed with air that will explode upon contact with an ignition source. Upper Limit of Explosion (UEL): The highest concentration at which a flammable mixture can explode upon contact with an ignition source.

[0029] Specifically, the media included in the media library are first tagged. Users of this invention need to first tagged the media name, nominal diameter (DN), and maximum working pressure (P). w Design pressure (P), maximum operating temperature (T) w The design temperature (T) is entered into the system, where the medium name, nominal diameter (DN), design pressure (P), and design temperature (T) are necessary parameters set for this system. When the maximum working pressure (P) w If not filled in, use the design pressure (P) for calculation, and the maximum operating temperature (T) w If not filled in, use the design temperature (T) for calculation. Then use... Figure 2 The logic diagram for determining the industrial pipeline grade is used for calculation. The technical effects of this invention will be demonstrated from four important logical operation perspectives: "preliminary judgment", "acute toxicity", "flammability" and "liquefied gas".

[0030] Preliminary assessment of the technical effect, such as Figure 3 The initial judgment is shown in the logic diagram. From... Figure 3 The initial logic diagram shows that when the maximum working pressure (P) is reached... w ), maximum working pressure (P) w When the parameters are filled in as required, logical operations will be performed based on the entered parameters first. If neither of these two parameters is entered, the corresponding design parameters will be automatically substituted for logical operations.

[0031] Acute toxicity technology effects such as Figure 4 The acute toxicity logic diagram is shown below. From... Figure 4The acute toxicity logic diagram shows that allyl cyanide is known to have an acute toxicity category of 2 and a boiling point of 116℃. Therefore, when the maximum operating temperature (T...) is... w > Boiling point temperature (t) s When the maximum operating temperature (T) is reached, the industrial pipeline is classified as GC1; when the maximum operating temperature (T) is reached, the pipeline is classified as GC1. w < Boiling point temperature (t) s When the industrial pipeline is classified as GC2, the pipeline level is determined to be GC2.

[0032] Flammability technology effect such as Figure 5 The flammability logic diagram is shown below. Figure 5 As can be seen from the flammability logic diagram, 2-propanol is known to be flammable in category 2 and has a boiling point of 82.5℃. Therefore, when the design pressure (P) ≥ 4MPa, the industrial pipeline is classified as GC1; when the design pressure (P) < 4MPa, the industrial pipeline is classified as GC2.

[0033] The effects of liquefied gas technology are as follows Figure 6 The logic diagram for liquefied gas is shown below. Figure 6 As can be seen from the liquefied gas logic diagram, given that the boiling point of nitrogen is -195.8℃, when the design temperature (T) is -196℃, the pipeline exists in a liquid nitrogen state, and the industrial pipeline level is determined to be GC2; when the design temperature (T) is 100℃, the industrial pipeline level is determined to be no longer subject to regulation.

[0034] On the other hand, Embodiment 1 of the present invention also discloses an intelligent industrial pipeline classification system based on expert logic model, comprising: Construction Module: Constructs a media library and sets characteristic labels for each media. The characteristic labels include acute toxicity category, flammability category, corrosiveness label, explosiveness label, vapor label, oxygen label, liquefied gas label, as well as the boiling point temperature, critical temperature, flash point, lower explosive limit, and upper explosive limit of the media. Receiving module: Receives industrial pipeline usage parameters input by the user, including medium name, nominal diameter, maximum working pressure, design pressure, maximum working temperature, and design temperature; Preliminary Judgment Module: Based on the industrial pipeline's operating parameters, a preliminary judgment is made. If the maximum working pressure is <0.1MPa or the nominal diameter is <50mm, it is determined that no supervision is required; otherwise, the process proceeds to the media characteristic judgment unit, including: The acute toxicity assessment subunit, flammability assessment subunit, corrosivity assessment subunit, explosiveness assessment subunit, and liquefied gas subunit perform acute toxicity assessment, flammability assessment, corrosivity assessment, explosiveness assessment, and liquefied gas assessment, respectively. Each assessment process is based on the characteristic tags in the media library and the usage parameters, and outputs intermediate results of industrial pipeline level GC1, industrial pipeline level GC2, or no supervision required according to expert logic rules. Final judgment module: Summarize the intermediate results and output the highest level as the final level of the industrial pipeline according to the priority of industrial pipeline level GC1 > industrial pipeline level GC2 > no supervision required.

[0035] Furthermore, the acute toxicity assessment subunit assessment process includes: If the acute toxicity of the medium is Category 1, then output Industrial Pipeline Class GC1; If the acute toxicity of the medium is Category 2 and the maximum operating temperature is ≥ the boiling point temperature of the medium, then the output industrial pipeline class GC1 is applied. If the maximum operating temperature is less than the boiling point temperature of the medium, then when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃, the output will be GC1 for industrial pipelines; otherwise, the output will be GC2 for industrial pipelines. If the acute toxicity of the medium is Category 3, then the output should be Industrial Pipeline Class GC1 when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, the output should be Industrial Pipeline Class GC2.

[0036] Furthermore, the flammability determination subunit's determination process includes: First, determine the relationship between the maximum operating temperature and the boiling point temperature of the medium; When the maximum operating temperature is greater than or equal to the boiling point temperature of the medium, if the flammability of the medium is Category 1, Category 2 or chemically unstable gas, and the design pressure is greater than or equal to 4 MPa, then the output should be GC1 for industrial pipelines; otherwise, when P is greater than or equal to 10 MPa or the design pressure is greater than or equal to 4 MPa and the design temperature is greater than or equal to 400℃, the output should be GC2 for industrial pipelines. When the maximum operating temperature is less than the boiling point of the medium, if the flammability of the medium is category 1 or category 2 and the design pressure is ≥4MPa, then the industrial pipeline rating GC1 is output; otherwise, the rating is determined for category 3 or category 4, and the corresponding rating is output based on the comparison between the flash point and the maximum operating temperature and the pressure-temperature conditions.

[0037] Furthermore, the explosiveness determination subunit's determination process includes: If the medium LEL < 10% or UEL - LEL ≥ 20%, then when the design pressure is ≥ 10MPa or the design pressure is ≥ 4MPa and the design temperature is ≥ 400℃, the output will be GC1 for industrial pipelines; otherwise, the output will be GC2. If the above-mentioned explosive conditions are not met, then when the maximum working temperature is greater than or equal to the boiling point temperature of the medium, the pipeline with a maximum working pressure greater than or equal to 1.6 MPa shall be output as industrial pipeline grade GC1 or industrial pipeline grade GC2 according to the pressure-temperature condition; the pipeline with a maximum working pressure less than 1.6 MPa and a nominal diameter greater than or equal to 150 mm shall be output as industrial pipeline grade GC1; otherwise, no supervision is required.

[0038] Furthermore, the liquefied gas subunit judgment process includes: If the medium is steam or oxygen, output GC1 when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, output industrial pipeline grade GC2. If the medium is liquefied gas and the maximum operating temperature is less than the critical temperature, then the output should be GC1 for industrial pipelines when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, the output should be GC2 for industrial pipelines.

[0039] Example 2: In this embodiment 2, all media included in the media library are tagged with characteristic labels. These characteristics include acute toxicity (classified into Category 1, Category 2, and Category 3), flammability (gaseous media are classified into Category 1, Category 2, and chemically unstable gas categories A and B; liquid media are classified into Category 1, Category 2, Category 3, and Category 4), corrosivity, explosiveness, vapor, oxygen, and liquefied gases. Furthermore, based on the technical requirements for industrial pipeline classification and referring to the technical conditions in the new pipeline regulations, the included media characteristics also include the boiling point temperature (t). s ), critical temperature of the medium (T) c ), medium flash point (t) f The invention specifies media parameters such as the upper explosive limit (UEL) and lower explosive limit (LEL). Users of this invention only need to input the industrial pipeline usage parameters [including media name, nominal diameter (DN), maximum working pressure (P...]. w Design pressure (P), maximum operating temperature (T) w [There are 6 types of design temperatures (T)], from which the industrial pipeline grade can be directly obtained. The specific implementation logic is as follows: Figure 2 Logic diagram for determining the grade of industrial pipelines.

[0040] After the industrial pipeline usage parameters are entered, the system will proceed to a preliminary judgment based on the directory. w Industrial pipelines with a pressure <0.1MPa or DN <50mm are deemed to be industrial pipelines that do not require regulation. When Pw When the pressure is ≥0.1MPa and the DN is ≥50mm, the system determines the industrial pipeline grade based on the characteristics of the medium, such as acute toxicity, flammability, corrosiveness, explosiveness, and liquefied gas. Industrial pipelines with acute toxicity of the medium classified as Category 1 are classified as GC1; those with acute toxicity of the medium not falling within Category 1 are classified as Category 2. Industrial pipelines with acute toxicity of the medium classified as Category 2, and T... w ≥t s When, it is determined to be GC1, T w <t s If P≥10MPa, or P≥4MPa and T≥400℃ [hereinafter referred to as "New Pipeline Regulation A1.1 (3) Judgment Conditions"], the industrial pipeline is judged as GC1; otherwise, the industrial pipeline is judged as GC2. If the acute toxicity of the medium is not within the range of Category 2, the judgment logic for acute toxicity of the medium is terminated. If the acute toxicity of the medium is Category 3, the industrial pipeline that meets the judgment conditions of New Pipeline Regulation A1.1 (3) is judged as GC1; otherwise, the industrial pipeline is judged as GC2. If the acute toxicity of the medium is not within the range of Category 3, the judgment logic is terminated. When determining the flammability of a medium, the first step is to perform a T test. w ≥t s Determine whether to place T w ≥t s Industrial pipelines with flammability classified as Category 1, Category 2, or chemically unstable, and with P ≥ 4 MPa, are classified as GC1. If they meet the criteria of the new pipeline regulation A1.1 (3), they are classified as GC1; otherwise, they are classified as GC2. T w <t s Flammability category 1 or 2, and when P ≥ 4 MPa, it is classified as GC1, T w <t s When the flammability of a medium is not within the range of Category 1 or Category 2, it is judged to be classified as Category 3; when T w <t s Industrial pipelines with a flammability category of 3 are classified as GC1 if they meet the judgment criteria of the new pipeline regulation A1.1(3); otherwise, they are classified as GC2. w <t s When the flammability of a medium is not within the range of categories 1, 2, or 3, it is judged to be in category 4 of flammability; when T w <t s Industrial pipes with a flammability category of 4, and T w ≥t f When T meets the judgment conditions of the new pipeline regulation A1.1(3), it is judged as GC1; otherwise, the industrial pipeline is judged as GC2. w <t s Industrial pipes with a flammability category of 4, and T w <tf The logic for determining the end of an industrial pipeline; When the medium is corrosive, the judgment condition that meets the new pipe regulation A1.1 (3) is GC1; otherwise, the industrial pipeline is judged as GC2; the judgment logic ends for industrial pipelines where the medium is not corrosive. Industrial pipelines with a media explosiveness LEL < 10% or UEL-LEL ≥ 20% are classified as GC1 if they meet the judgment conditions of the new pipeline regulation A1.1 (3); otherwise, they are classified as GC2. Industrial pipelines that do not meet the explosiveness LEL < 10% or UEL-LEL ≥ 20% enter the boiling point judgment logic; when T w ≥t s At that time, for P w Industrial pipelines with a pressure ≥1.6MPa are classified as GC1 if they meet the judgment criteria of the new pipeline regulation A1.1(3); otherwise, they are classified as GC2. For P w Industrial pipelines with a pressure of <1.6MPa and industrial pipelines with a DN≥150mm are classified as GC2; otherwise, they are classified as not requiring supervision. When determining the medium of liquefied gas, industrial pipelines whose medium is steam or oxygen are classified as GC1 if they meet the judgment conditions of the new pipeline regulation A1.1(3); otherwise, industrial pipelines are classified as GC2. If the medium is not steam or oxygen, the judgment of critical temperature and boiling point is applied. w <T c Industrial pipelines that meet the judgment conditions of the new pipeline regulation A1.1(3) are classified as GC1; otherwise, they are classified as GC2. liquefied gas media that do not meet the T... w <T c The logic for determining the end of an industrial pipeline.

[0041] Output results: Summarize the above results (no more than 5), and finally output the maximum value in the order of GC1 > GC2 > No supervision required.

[0042] Symbol explanation: Design temperature: T, the set metal temperature of the component (average temperature along the metal cross section of the component) under normal operating conditions, in °C; Maximum operating temperature: T w Under normal operating conditions, the highest metal temperature of the components in the pipeline is ℃; Design pressure: P, the maximum working pressure of the pipeline during operation, in MPa; Maximum working pressure: P w The maximum working pressure of the pipeline during normal operation, in MPa; Nominal diameter: DN, refers to the standardized pipe diameter series, in mm; boiling point temperature of medium: t sThe temperature at which the saturated vapor pressure of a liquid equals the external pressure. When this temperature is exceeded, the medium begins to exist in the pipe as a gas-liquid coexistence. (℃) Critical temperature of medium: T c The highest temperature at which the medium exists in liquid form. Above this temperature, the medium exists only in gaseous form in the pipeline. (℃) Medium flash point: t f The lowest temperature at which a mixture of vapor and air on the surface of a flammable liquid can produce a flash fire upon contact with a flame is ℃. Lower Explosive Limit (LEL): The lowest concentration (%) of a flammable gas, vapor, or dust mixed with air that will explode upon contact with an ignition source. Upper Limit of Explosion (UEL): The highest concentration at which a flammable mixture can explode upon contact with an ignition source.

[0043] by Figure 6 For the liquefied gas logic diagram: when the nominal pipe diameter (DN) is 80mm, the design pressure (P) is 1.5MPa, the design temperature (T) is -196℃, and the medium is nitrogen [boiling point (t)]... s The critical temperature is -195.8℃, and the critical temperature (T) is... c The temperature is -147.0℃. In the initial judgment logic box, based on the maximum working pressure (P... w (If the maximum working pressure is not specified, the operating logic will be based on the design pressure). Based on the nominal diameter (DN) requirement, the pipeline simultaneously enters the logic judgment process for acute toxicity, flammability, corrosiveness, explosiveness, and liquefied gas. The judgment process is as follows: Figure 7 The flowchart shown is for the -196℃ nitrogen pipeline judgment logic.

[0044] In the logic for judging acute toxicity, flammability, and corrosivity, since nitrogen does not possess these properties, the logic in these three areas is terminated and no result is output.

[0045] In the explosiveness logic judgment, since nitrogen is not explosive, the final (operating temperature, if not specified, follows the design temperature operation logic) T is used. w ≥ (boiling point) t s In the logical judgment, since T=T at this time w <t s If so, then the pipeline is deemed not to require supervision.

[0046] In the logical judgment of liquefied gases, nitrogen is classified as a liquefied gas based on the included media library, referring to "Classification and Labelling Specifications for Chemicals Part 6: Pressurized Gases" (GB 30000.6-2013) and "Safety Technical Regulations for Gas Cylinders" (TSG 23-2021). Therefore, in the logical judgment of liquefied gases, because T... w <Tc Since P < 4 MPa, the pipeline is determined to be of GC2 grade.

[0047] Combining the two results above, the final output for this pipeline level is GC2.

[0048] When the nominal diameter of the pipe (DN) is 80mm, the design pressure (P) is 1.5MPa, the design temperature (T) is 100℃, and the medium is nitrogen (boiling point (t)... s The critical temperature is -195.8℃, and the critical temperature (T) is... c (The temperature is -147.0℃). In the preliminary judgment logic box, based on the maximum working pressure (P) w (If the maximum working pressure is not specified, the operating logic will be based on the design pressure). Based on the nominal diameter (DN) requirement, the pipeline simultaneously enters the logic judgment process for acute toxicity, flammability, corrosiveness, explosiveness, and liquefied gas. The judgment process is as follows: Figure 8 The flowchart shown is the logic flow for determining the 100℃ nitrogen pipeline.

[0049] In the logic for judging acute toxicity, flammability, and corrosivity, since nitrogen does not possess these properties, the logic in these three areas terminates, resulting in no output. In the judgment of liquefied gases, because T... w >T c Therefore, there is no output in this logical flow.

[0050] In the logical judgment of explosiveness, due to T w >t s P w <1.6MPa, DN<150mm, this pipeline is determined to be exempt from supervision.

[0051] The pipeline was ultimately determined to be ineligible for regulation.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent industrial pipeline classification method based on expert logic model, characterized in that, include: A media library is constructed, and characteristic labels are set for each media. The characteristic labels include acute toxicity category, flammability category, corrosiveness label, explosiveness label, vapor label, oxygen label, liquefied gas label, as well as the boiling point temperature, critical temperature, flash point, lower explosive limit and upper explosive limit of the media. Receive user-inputted industrial pipeline usage parameters, which include medium name, nominal diameter, maximum working pressure, design pressure, maximum working temperature, and design temperature; Based on the initial judgment of the industrial pipeline usage parameters, if the maximum working pressure is <0.1MPa or the nominal diameter is <50mm, it is determined that no supervision is required. Otherwise, proceed to the media characteristic determination process, including: Acute toxicity, flammability, corrosivity, explosiveness, and liquefied gas are assessed separately. Each assessment process is based on the characteristic tags in the media library and the usage parameters, and outputs intermediate results of industrial pipeline grade GC1, industrial pipeline grade GC2, or no supervision required according to expert logic rules. The intermediate results are summarized, and the highest priority level is output as the final level of the industrial pipeline, according to the order of priority: Industrial Pipeline Level GC1 > Industrial Pipeline Level GC2 > No Regulation Required.

2. The intelligent industrial pipeline grade determination method based on expert logic model according to claim 1, characterized in that, The acute toxicity assessment process includes: If the acute toxicity of the medium is Category 1, then output Industrial Pipeline Class GC1; If the acute toxicity of the medium is Category 2 and the maximum operating temperature is ≥ the boiling point temperature of the medium, then the output industrial pipeline class GC1 is applied. If the maximum operating temperature is less than the boiling point temperature of the medium, then when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃, the output will be GC1 for industrial pipelines; otherwise, the output will be GC2 for industrial pipelines. If the acute toxicity of the medium is Category 3, then the output should be Industrial Pipeline Class GC1 when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, the output should be Industrial Pipeline Class GC2.

3. The intelligent industrial pipeline grade determination method based on expert logic model according to claim 1, characterized in that, The flammability determination process includes: First, determine the relationship between the maximum operating temperature and the boiling point temperature of the medium; When the maximum operating temperature is greater than or equal to the boiling point temperature of the medium, if the flammability of the medium is Category 1, Category 2 or chemically unstable gas, and the design pressure is greater than or equal to 4 MPa, then the output should be GC1 for industrial pipelines; otherwise, when P is greater than or equal to 10 MPa or the design pressure is greater than or equal to 4 MPa and the design temperature is greater than or equal to 400℃, the output should be GC2 for industrial pipelines. When the maximum operating temperature is less than the boiling point of the medium, if the flammability of the medium is category 1 or category 2 and the design pressure is ≥4MPa, then the industrial pipeline rating GC1 is output; otherwise, the rating is determined for category 3 or category 4, and the corresponding rating is output based on the comparison between the flash point and the maximum operating temperature and the pressure-temperature conditions.

4. The intelligent industrial pipeline grade determination method based on expert logic model according to claim 1, characterized in that, The explosiveness determination process includes: If the medium LEL < 10% or UEL - LEL ≥ 20%, then when the design pressure is ≥ 10MPa or the design pressure is ≥ 4MPa and the design temperature is ≥ 400℃, the output will be GC1 for industrial pipelines; otherwise, the output will be GC2. If the above-mentioned explosive conditions are not met, then when the maximum working temperature is greater than or equal to the boiling point temperature of the medium, the pipeline with a maximum working pressure greater than or equal to 1.6 MPa shall be output as industrial pipeline grade GC1 or industrial pipeline grade GC2 according to the pressure-temperature condition; the pipeline with a maximum working pressure less than 1.6 MPa and a nominal diameter greater than or equal to 150 mm shall be output as industrial pipeline grade GC1; otherwise, no supervision is required.

5. The intelligent industrial pipeline grade determination method based on expert logic model according to claim 1, characterized in that, The liquefied gas determination process includes: If the medium is steam or oxygen, output GC1 when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, output industrial pipeline grade GC2. If the medium is liquefied gas and the maximum operating temperature is less than the critical temperature, then the output should be GC1 for industrial pipelines when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, the output should be GC2 for industrial pipelines.

6. An intelligent industrial pipeline classification system based on expert logic model, characterized in that, include: Construction Module: Constructs a media library and sets characteristic labels for each media. The characteristic labels include acute toxicity category, flammability category, corrosiveness label, explosiveness label, vapor label, oxygen label, liquefied gas label, as well as the boiling point temperature, critical temperature, flash point, lower explosive limit, and upper explosive limit of the media. Receiving module: Receives industrial pipeline usage parameters input by the user, including medium name, nominal diameter, maximum working pressure, design pressure, maximum working temperature, and design temperature; Preliminary judgment module: Based on the usage parameters of industrial pipelines, a preliminary judgment is made. If the maximum working pressure is <0.1MPa or the nominal diameter is <50mm, it is determined that no supervision is required. Otherwise, proceed to the media characteristic determination process unit, including: The acute toxicity assessment subunit, flammability assessment subunit, corrosivity assessment subunit, explosiveness assessment subunit, and liquefied gas subunit perform acute toxicity assessment, flammability assessment, corrosivity assessment, explosiveness assessment, and liquefied gas assessment, respectively. Each assessment process is based on the characteristic tags in the media library and the usage parameters, and outputs intermediate results of industrial pipeline level GC1, industrial pipeline level GC2, or no supervision required according to expert logic rules. Final judgment module: Summarize the intermediate results and output the highest level as the final level of the industrial pipeline according to the priority of industrial pipeline level GC1 > industrial pipeline level GC2 > no supervision required.

7. The intelligent industrial pipeline classification system based on expert logic model according to claim 6, characterized in that, The acute toxicity assessment subunit assessment process includes: If the acute toxicity of the medium is Category 1, then output Industrial Pipeline Class GC1; If the acute toxicity of the medium is Category 2 and the maximum operating temperature is ≥ the boiling point temperature of the medium, then the output industrial pipeline class GC1 is applied. If the maximum operating temperature is less than the boiling point temperature of the medium, then when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃, the output will be GC1 for industrial pipelines; otherwise, the output will be GC2 for industrial pipelines. If the acute toxicity of the medium is Category 3, then the output should be Industrial Pipeline Class GC1 when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, the output should be Industrial Pipeline Class GC2.

8. The intelligent industrial pipeline classification system based on expert logic model according to claim 6, characterized in that, The flammability determination subunit's determination process includes: First, determine the relationship between the maximum operating temperature and the boiling point temperature of the medium; When the maximum operating temperature is greater than or equal to the boiling point temperature of the medium, if the flammability of the medium is Category 1, Category 2 or chemically unstable gas, and the design pressure is greater than or equal to 4 MPa, then the output should be GC1 for industrial pipelines; otherwise, when P is greater than or equal to 10 MPa or the design pressure is greater than or equal to 4 MPa and the design temperature is greater than or equal to 400℃, the output should be GC2 for industrial pipelines. When the maximum operating temperature is less than the boiling point of the medium, if the flammability of the medium is category 1 or category 2 and the design pressure is ≥4MPa, then the industrial pipeline rating GC1 is output; otherwise, the rating is determined for category 3 or category 4, and the corresponding rating is output based on the comparison between the flash point and the maximum operating temperature and the pressure-temperature conditions.

9. The intelligent industrial pipeline classification system based on expert logic model according to claim 6, characterized in that, The explosiveness determination subunit's determination process includes: If the medium LEL < 10% or UEL - LEL ≥ 20%, then when the design pressure is ≥ 10MPa or the design pressure is ≥ 4MPa and the design temperature is ≥ 400℃, the output will be GC1 for industrial pipelines; otherwise, the output will be GC2. If the above-mentioned explosive conditions are not met, then when the maximum working temperature is greater than or equal to the boiling point temperature of the medium, the pipeline with a maximum working pressure greater than or equal to 1.6 MPa shall be output as industrial pipeline grade GC1 or industrial pipeline grade GC2 according to the pressure-temperature condition; the pipeline with a maximum working pressure less than 1.6 MPa and a nominal diameter greater than or equal to 150 mm shall be output as industrial pipeline grade GC1; otherwise, no supervision is required.

10. The intelligent industrial pipeline grade determination method based on expert logic model according to claim 6, characterized in that, The liquefied gas subunit judgment process includes: If the medium is steam or oxygen, output GC1 when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, output industrial pipeline grade GC2. If the medium is liquefied gas and the maximum operating temperature is less than the critical temperature, then the output should be GC1 for industrial pipelines when the design pressure is ≥10MPa or the design pressure is ≥4MPa and the design temperature is ≥400℃; otherwise, the output should be GC2 for industrial pipelines.

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