CN105320994A - Oil and gas pipeline safety assessment method and device - Google Patents
Oil and gas pipeline safety assessment method and device Download PDFInfo
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- CN105320994A CN105320994A CN201410370827.1A CN201410370827A CN105320994A CN 105320994 A CN105320994 A CN 105320994A CN 201410370827 A CN201410370827 A CN 201410370827A CN 105320994 A CN105320994 A CN 105320994A
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Abstract
The invention discloses an oil and gas pipeline safety assessment method and device, which belongs to the field of safety assessment. The method comprises the steps that weak magnetic detection is carried out on each measurement point in a number of measurement points on a first oil and gas pipeline; the measurement points with stress greater than a preset numerical value are determined as stress concentration points; according to the stress concentration points, the first oil and gas pipeline is divided into a number of second oil and gas pipelines; scanning thickness measuring is carried out on each second oil and gas pipeline in a number of second oil and gas pipelines; the minimum thickness is selected from the thickness of each second oil and gas pipeline and is used as the minimum thickness of the first oil and gas pipeline; according to the minimum thickness of the first oil and gas pipeline, the safe work pressure of the first oil and gas pipeline is calculated; and according to the safe work pressure of the first oil and gas pipeline, safety assessment is carried out on the first oil and gas pipeline. The device comprises a first determining module, a detection module, a second determining module, a thickness measurement module, a selection module, a calculation module and an assessment module. According to the invention, safety assessment can be carried out on potential damage of the oil and gas pipeline.
Description
Technical field
The present invention relates to safety assessment field, particularly the method and apparatus assessed of a kind of oil-gas pipeline safety.
Background technology
Along with the develop rapidly of world economy, grow with each passing day to the demand of petroleum gas, as the transmission mode that petroleum gas is the most economic and safe, pipeline transmission is developed fast.But oil and gas pipes may cause various damage because of factors such as burn into mechanical loss, geologic hazards during use, carries out safety assessment to oil and gas pipes, for support equipment reliability service and personal safety significant.
Prior art provides the method for a kind of oil-gas pipeline safety assessment, Ke Yiwei: the change of the heat caused by the material internal structure exception of oil and gas pipes or defect, sound, optical, electrical, magnetic etc., judges the whether existence damage of oil and gas pipes.Such as, adopt rays method to take oil and gas pipes, and check whether oil and gas pipes exists damage according to shooting results.When the existence damage of oil and gas pipes, determine that oil and gas pipes exists safety problem; When the inside of the various materials of oil and gas pipes or surface do not exist damage, determine that oil and gas pipes does not exist safety problem.
Realizing in process of the present invention, inventor finds that prior art at least exists following problem:
The macroscopic damage that can only show for oil and gas pipes due to safety evaluation method of the prior art carries out safety assessment, safety assessment can not be carried out to the damage that oil and gas pipes is potential, thus illustrate that the safety evaluation method based on conventional Dynamic Non-Destruction Measurement in prior art has limitation.
Summary of the invention
In order to make the problem of solution prior art, the invention provides the method and apparatus of a kind of oil-gas pipeline safety assessment.Technical scheme is as follows:
On the one hand, the invention provides the method for a kind of oil-gas pipeline safety assessment, described method comprises:
Determine the multiple measurement points on the first oil and gas pipes, described multiple measurement point is evenly distributed on described first oil and gas pipes;
Weak Magnetic testi is carried out to each measurement point in described multiple measurement point, obtains the stress that described each measurement point is corresponding;
Measurement point stress being greater than default value is defined as stress concentration point, and according to described stress concentration point, described first oil and gas pipes is divided into multiple second oil and gas pipes;
Scanning thickness measuring is carried out to each second oil and gas pipes in described multiple second oil and gas pipes, obtains the thickness of described each second oil and gas pipes;
The minimum thickness of minimum thickness as described first oil and gas pipes is selected from the thickness of described each second oil and gas pipes;
The safe-working pressure of described first oil and gas pipes is calculated according to the minimum thickness of described first oil and gas pipes;
Safe-working pressure according to described first oil and gas pipes carries out safety assessment to described first oil and gas pipes.
Preferably, the described minimum thickness according to described first oil and gas pipes calculates the safe-working pressure of described first oil and gas pipes, comprising:
Obtain standard thickness corresponding to described first oil and gas pipes, normal intensity design ratio, standard weld coefficient and standard yield strength;
Calculate the ratio of described minimum thickness and described standard thickness, obtain thickness parameter;
Current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength is calculated according to described thickness parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength;
Calculate the product of current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength, obtain the maximum stress that described first oil and gas pipes can bear;
Calculate the product of maximum stress, described minimum thickness and the numerical value 2 that described first oil and gas pipes can bear;
Calculate the ratio of the overall diameter of described product and described first oil and gas pipes, obtain the safe-working pressure of described oil and gas pipes.
Preferably, the described minimum thickness according to described first oil and gas pipes calculates the safe-working pressure of described first oil and gas pipes, comprising:
Obtain guideline life corresponding to described first oil and gas pipes, normal intensity design system, standard weld coefficient and standard yield strength and current tenure of use;
Calculate the ratio of described current tenure of use and described guideline life, obtain time limit parameter;
Current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength is calculated according to described time limit parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength;
Calculate the product of current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength, obtain the maximum stress that described first oil and gas pipes can bear;
Calculate the product of maximum stress, described minimum thickness and the numerical value 2 that described first oil and gas pipes can bear;
Calculate the ratio of the overall diameter of described product and described first oil and gas pipes, obtain the safe-working pressure of described oil and gas pipes.
Preferably, described Intensity Design coefficient, weld joint factor and the yield strength corresponding according to current described first oil and gas pipes of described time limit parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength calculating, comprising:
Obtain the position residing for described first oil and gas pipes, according to described position acquisition environmental parameter;
Current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength is calculated according to described environmental parameter, described time limit parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength.
Preferably, the described multiple measurement points determined on the first oil and gas pipes, comprising:
First oil and gas pipes determines multiple circumference, and the distance between every two adjacent circumferential in described multiple circumference is equal;
Each in described multiple circumference circumferentially determines multiple measurement points that interval is equal, and line between in described every two adjacent circumferential one measurement point circumferentially and another each measurement point is circumferentially not parallel with the central shaft of described first oil and gas pipes.
On the other hand, the invention provides the device of a kind of oil-gas pipeline safety assessment, described device comprises:
First determination module, for determining the multiple measurement points on the first oil and gas pipes, described multiple measurement point is evenly distributed on described first oil and gas pipes;
Detection module, for carrying out weak Magnetic testi to each measurement point in described multiple measurement point, obtains the stress that described each measurement point is corresponding;
Second determination module, is defined as stress concentration point for measurement point stress being greater than default value, and according to described stress concentration point, described first oil and gas pipes is divided into multiple second oil and gas pipes;
Thickness measuring module, for carrying out scanning thickness measuring to each second oil and gas pipes in described multiple second oil and gas pipes, obtains the thickness of described each second oil and gas pipes;
Choose module, for selecting the minimum thickness of minimum thickness as described first oil and gas pipes in the thickness from described each second oil and gas pipes;
Computing module, for calculating the safe-working pressure of described first oil and gas pipes according to the minimum thickness of described first oil and gas pipes;
Evaluation module, carries out safety assessment for the safe-working pressure according to described first oil and gas pipes to described first oil and gas pipes.
Preferably, described computing module, comprising:
First acquiring unit, for obtaining standard thickness corresponding to described first oil and gas pipes, normal intensity design ratio, standard weld coefficient and standard yield strength;
First computing unit, for calculating the ratio of described minimum thickness and described standard thickness, obtains thickness parameter;
Second computing unit, for calculating current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength according to described thickness parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength;
3rd computing unit, for calculating the product of current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength, obtains the maximum stress that described first oil and gas pipes can bear;
4th computing unit, for calculating the product of maximum stress, described minimum thickness and numerical value 2 that described first oil and gas pipes can bear;
5th computing unit, for calculating the ratio of the overall diameter of described product and described first oil and gas pipes, obtains the safe-working pressure of described oil and gas pipes.
Preferably, described computing module, comprising:
Second acquisition unit, for obtaining guideline life corresponding to described first oil and gas pipes, normal intensity design system, standard weld coefficient and standard yield strength and current tenure of use;
6th computing unit, for calculating the ratio of described current tenure of use and described guideline life, obtains time limit parameter;
7th computing unit, for calculating current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength according to described time limit parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength;
8th computing unit, for calculating the product of current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength, obtains the maximum stress that described first oil and gas pipes can bear;
9th computing unit, for calculating the product of maximum stress, described minimum thickness and numerical value 2 that described first oil and gas pipes can bear;
Tenth computing unit, for calculating the ratio of the overall diameter of described product and described first oil and gas pipes, obtains the safe-working pressure of described oil and gas pipes.
Preferably, described 7th computing unit, comprising:
Obtain subelement, for obtaining the position residing for described first oil and gas pipes, according to described position acquisition environmental parameter;
Computation subunit, for calculating current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength according to described environmental parameter, described time limit parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength.
Preferably, described first determination module, comprising:
First determining unit, for determining multiple circumference on the first oil and gas pipes, the distance between every two adjacent circumferential in described multiple circumference is equal;
Second determining unit, circumferentially determine for each in described multiple circumference multiple measurement points that interval is equal, and line between in described every two adjacent circumferential one measurement point circumferentially and another each measurement point is circumferentially not parallel with the central shaft of described first oil and gas pipes.
In embodiments of the present invention, determine the multiple measurement points on the first oil and gas pipes, multiple measurement point is evenly distributed on the first oil and gas pipes; Weak Magnetic testi is carried out to each measurement point in multiple measurement point, obtains the stress that each measurement point is corresponding; Measurement point stress being greater than default value is defined as stress concentration point, and according to stress concentration point, the first oil and gas pipes is divided into multiple second oil and gas pipes; Scanning thickness measuring is carried out to each second oil and gas pipes in multiple second oil and gas pipes, obtains the thickness of each second oil and gas pipes; The minimum thickness of minimum thickness as the first oil and gas pipes is selected from the thickness of each second oil and gas pipes; The safe-working pressure of the first oil and gas pipes is calculated according to the minimum thickness of the first oil and gas pipes; Safe-working pressure according to the first oil and gas pipes carries out safety assessment to the first oil and gas pipes, thus safety assessment is carried out in the damage that can realize oil and gas pipes is potential, and the method is safe and reliable, is suitable for the safety assessment of long-distance oil & gas pipeline.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of a kind of oil-gas pipeline safety assessment that the embodiment of the present invention 1 provides;
Fig. 2-1 is the method flow diagram of a kind of oil-gas pipeline safety assessment that the embodiment of the present invention 2 provides;
Fig. 2-2 is schematic diagram of the multiple measurement points on determination first oil and gas pipes that provides of the embodiment of the present invention 2;
Fig. 3 is the apparatus structure schematic diagram of a kind of oil-gas pipeline safety assessment that the embodiment of the present invention 3 provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment 1
Embodiments provide the method for a kind of oil-gas pipeline safety assessment.See Fig. 1, wherein, the method comprises:
Step 101: determine the multiple measurement points on the first oil and gas pipes, multiple measurement point is evenly distributed on the first oil and gas pipes;
Step 102: weak Magnetic testi is carried out to each measurement point in multiple measurement point, obtains the stress that each measurement point is corresponding;
Step 103: measurement point stress being greater than default value is defined as stress concentration point, and according to stress concentration point, the first oil and gas pipes is divided into multiple second oil and gas pipes;
Step 104: scanning thickness measuring is carried out to each second oil and gas pipes in multiple second oil and gas pipes, obtains the thickness of each second oil and gas pipes;
Step 105: select the minimum thickness of minimum thickness as the first oil and gas pipes from the thickness of each second oil and gas pipes;
Step 106: the safe-working pressure calculating the first oil and gas pipes according to the minimum thickness of the first oil and gas pipes;
Step 107: the safe-working pressure according to the first oil and gas pipes carries out safety assessment to the first oil and gas pipes.
In embodiments of the present invention, determine the multiple measurement points on the first oil and gas pipes, multiple measurement point is evenly distributed on the first oil and gas pipes; Weak Magnetic testi is carried out to each measurement point in multiple measurement point, obtains the stress that each measurement point is corresponding; Measurement point stress being greater than default value is defined as stress concentration point, and according to stress concentration point, the first oil and gas pipes is divided into multiple second oil and gas pipes; Scanning thickness measuring is carried out to each second oil and gas pipes in multiple second oil and gas pipes, obtains the thickness of each second oil and gas pipes; The minimum thickness of minimum thickness as the first oil and gas pipes is selected from the thickness of each second oil and gas pipes; The safe-working pressure of the first oil and gas pipes is calculated according to the minimum thickness of the first oil and gas pipes; Safe-working pressure according to the first oil and gas pipes carries out safety assessment to the first oil and gas pipes, thus safety assessment is carried out in the damage that can realize oil and gas pipes is potential, and the method is safe and reliable, is suitable for the safety assessment of long-distance oil & gas pipeline.
Embodiment 2
Embodiments provide the method for a kind of oil-gas pipeline safety assessment.See Fig. 2-1, wherein, the method comprises:
Step 201: determine the multiple measurement points on the first oil and gas pipes, multiple measurement point is evenly distributed on the first oil and gas pipes;
First oil and gas pipes is oil and gas pipes to be assessed, when carrying out safety assessment to the first oil and gas pipes, first on the first oil and gas pipes, determining multiple measurement point, detecting multiple measurement point.Determine that the multiple measurement points on the first oil and gas pipes can be realized by following steps (1) and (2), comprising:
(1) distance between every two adjacent circumferential: determine multiple circumference on the first oil and gas pipes, in multiple circumference is equal;
Particularly, sample devices determines circumference of sampling, and terminal is connected with sample devices, and terminal control sample devices determines multiple circumference according to the sampling circumference determined on the first oil and gas pipes.
(2) line between one: each in multiple circumference circumferentially determines multiple measurement points that interval is equal, and in every two adjacent circumferential measurement point circumferentially and another each measurement point is circumferentially not parallel with the central shaft of the first oil and gas pipes.
Particularly, sample devices circumferentially determines sampled point in sampling, and ensures that the line between in every two adjacent circumferential one sampled point circumferentially and another each sampled point is circumferentially not parallel with the central shaft of the first oil and gas pipes; Terminal control sample devices circumferentially determines multiple measurement points that interval is equal, see Fig. 2-2 according to each in multiple circumference of the sampled point determined.
Wherein, the line between one in every two adjacent circumferential measurement point circumferentially and another each measurement point is circumferentially not parallel with the central shaft of the first oil and gas pipes, thus multiple measurement point can be made to be evenly distributed on the first oil and gas pipes.
Step 202: weak Magnetic testi is carried out to each measurement point in multiple measurement point, obtains the stress that each measurement point is corresponding;
Wherein, weak Magnetic testi utilizes the change of Magnetic memory testing Weak magentic-field to judge the change of oil and gas pipes upper stress; Stress refers to the additional internal force that unit area is born.Magnetic Memory is the characteristics intrinsic after geometric configuration is formed of steel, and the Weak magentic-field formed changes with the change of stress.
Wherein, step 202 is specially: the medium of the first oil and gas pipes conveying promotes detecting device at the first oil and gas pipes internal slide, by detecting device detect each measurement point in multiple measurement points of the first oil and gas pipes weak magnetic signal, and the weak magnetic signal of detection is sent to the weak magnetic sensor being arranged on oil and gas pipes outside surface; Weak magnetic sensor receives the weak magnetic signal that detecting device sends, and obtains stress corresponding to each measurement point according to the weak magnetic signal received.
Wherein, in embodiments of the present invention, the stress larger oil and gas pipes of weak magnetic signal existed is larger.
Step 203: measurement point stress being greater than default value is defined as stress concentration point, and according to stress concentration point, the first oil and gas pipes is divided into multiple second oil and gas pipes;
Wherein, stress concentrates the phenomenon referring to that oil and gas pipes enlarges markedly due to subrange internal stress that extraneous factor or self factor such as geometric configuration, physical dimension are undergone mutation and caused.
Wherein, step 203 is specially: judge whether the stress of measurement point is greater than default value, if so, is defined as stress concentration point; If not, non-stressed centrostigma is defined as.Oil and gas pipes between adjacent two stress is defined as the second oil and gas pipes, thus the first oil and gas pipes is divided into multiple second oil and gas pipes.
In this step, also can determine adjacent two stress, be respectively the first stress and the second stress; Determine first circumference at the first stress place and second circumference at the second stress place; Oil and gas pipes between first circumference and the second circumference is defined as the second oil and gas pipes, thus the first oil and gas pipes is divided into multiple second oil and gas pipes.
Wherein, default value can carry out arranging and changing according to the system performance of the first oil and gas pipes, in embodiments of the present invention, is not specifically limited default value.
Further, in embodiments of the present invention, classification can be carried out according to the size of the weak magnetic signal of each measurement point, the weak magnetic signal in the first preset range is classified as stress levels 1; Weak magnetic signal in the second preset range is classified as stress levels 2; Weak magnetic signal in the 3rd preset range is classified as stress levels 3; Weak magnetic signal in the 4th preset range is classified as stress levels 4; Weak magnetic signal in the 5th preset range is classified as stress levels 5; Weak magnetic signal in the 6th preset range is classified as stress levels 6.
Wherein, first preset range, the second preset range, the 3rd preset range, the 4th preset range, the 5th preset range and the 6th preset range can carry out arranging and changing according to the performance of the first oil and gas pipes, in embodiments of the present invention, the value of the first preset range, the second preset range, the 3rd preset range, the 4th preset range, the 5th preset range and the 6th preset range is not specifically limited.
Such as, in embodiments of the present invention, the first preset range is 800-2000nT (nanoteslas, receive tesla), then stress levels 1 is normal presence stress phenomena; Second preset range is 2000-3000nT, then stress levels 2 is stress Relatively centralized point; 3rd preset range is 3000-4000nT, then stress levels 3 is stress ratio comparatively centrostigma; 4th preset range is 4000-5000nT, then stress levels 4 is stress concentration point; 5th preset range is 5000-6000nT, then stress levels 5 is the stronger centrostigma of stress; 6th preset range is 6000-7000nT, then stress levels 6 is the strong centrostigma of stress; Stress levels 4, stress levels 5 and stress levels 6 are defined as stress concentration point.
Step 204: scanning thickness measuring is carried out to each second oil and gas pipes in multiple second oil and gas pipes, obtains the thickness of each second oil and gas pipes;
Particularly, 100% body C is carried out to each second oil and gas pipes in multiple second oil and gas pipes and scans thickness measuring, obtain the thickness of each second oil and gas pipes.
Step 205: select the minimum thickness of minimum thickness as the first oil and gas pipes from the thickness of each second oil and gas pipes;
Step 206: the safe-working pressure calculating the first oil and gas pipes according to the minimum thickness of the first oil and gas pipes;
Wherein, safe-working pressure is the working pressure that oil and gas pipes can bear in normal operation.
Wherein, step 206 can be realized by first kind of way or the second way, for the first implementation, can pass through following steps (1) to (6) and realize, comprise:
(1): obtain standard thickness corresponding to the first oil and gas pipes, normal intensity design ratio, standard weld coefficient and standard yield strength;
Wherein, thickness when standard thickness refers to that oil and gas pipes dispatches from the factory; The Intensity Design system that normal intensity design ratio is corresponding when referring to that oil and gas pipes dispatches from the factory; The weld joint factor that standard weld coefficient is corresponding when referring to that oil and gas pipes dispatches from the factory; Yield strength corresponding when standard yield strength refers to that oil and gas pipes dispatches from the factory.
Wherein, normal intensity design ratio, standard weld coefficient and standard yield strength can carry out arranging and changing according to standard, are not specifically limited in embodiments of the present invention to normal intensity design ratio, standard weld coefficient and standard yield strength.
Such as, according to the regulation of standard GB50253-2003 " Oil Transportation Pipeline Engineering design specifications " and standard SY/T0015.1-98 " crude oil and natural-gas transfer pipeline Crossing Engineering design specifications ", general area outside transfer station, normal intensity design ratio F gets 0.72.According to the regulation of standard GB50253-2003 " Oil Transportation Pipeline Engineering design specifications ", grade of steel is that the Steel tube standard weld joint factor E of L450 gets 1.0.When assessing oil and gas pipes, standard yield strength σ s gets 450 megapascal (MPa) MPa.
(2): the ratio calculating minimum thickness and standard thickness, obtains thickness parameter;
In use, thickness is lossy for first oil and gas pipes, calculates the ratio of minimum thickness and standard thickness in this step, obtains the thickness parameter of the first oil and gas pipes.
(3): calculate current first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength according to thickness parameter, normal intensity design ratio, standard weld coefficient and standard yield strength;
The product of calculated thickness parameter and normal intensity design ratio, obtains the Intensity Design coefficient that current first oil and gas pipes is corresponding; The product of calculated thickness parameter and standard weld coefficient, obtains the weld joint factor that current first oil and gas pipes is corresponding; The product of calculated thickness parameter and standard yield strength, obtains the yield strength that current first oil and gas pipes is corresponding.
(4): the product calculating current first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength, obtains the maximum stress that the first oil and gas pipes can bear;
Calculate the product of current first oil and gas pipes corresponding Intensity Design coefficient F, weld joint factor E and yield strength σ s; Using the maximum stress that product can bear as the first oil and gas pipes.
Wherein, in embodiments of the present invention, the maximum stress that the first oil and gas pipes can bear is [σ]=FE σ
s.
(5): the product calculating maximum stress, minimum thickness and the numerical value 2 that the first oil and gas pipes can bear;
(6): the ratio calculating the overall diameter of product and the first oil and gas pipes, obtains the safe-working pressure of oil and gas pipes.
Calculate the minimum thickness t of maximum stress σ that the first oil and gas pipes can bear, the first oil and gas pipes
minwith the product of numerical value 2; Calculate the ratio P of the overall diameter D of product and the first oil and gas pipes; Using the safe-working pressure of ratio P as the first oil and gas pipes.
Wherein, in embodiments of the present invention, safe-working pressure P=2 × [the σ] × t of the first oil and gas pipes
min÷ D.[σ]=FE σ
s, then safe-working pressure P=2 × FE σ of the first oil and gas pipes
s× t
min÷ D.
Wherein, the minimum thickness of the maximum stress that can bear according to the first oil and gas pipes and the first oil and gas pipes measures the overall diameter D of the first oil and gas pipes before calculating the safe-working pressure of the first oil and gas pipes.
Further, in embodiments of the present invention, calculate the safe-working pressure of the first oil and gas pipes according to the minimum thickness of the first oil and gas pipes, select representative, dangerous high and the first more serious oil and gas pipes of damage to carry out safety assessment, make appraisal procedure more reliable.
Such as, the overall diameter of the first oil and gas pipes is 457mm, and minimum thickness is 6.97mm, and the Intensity Design coefficient F that current first oil and gas pipes is corresponding is 0.72, and weld joint factor E is 1.0, yield strength σ
sfor 450MPa, then the maximum stress that the first oil and gas pipes can bear is [σ]=FE σ
s=0.72 × 1.0 × 450=324N.Safe-working pressure P=2 × [the σ] × t of the first oil and gas pipes
min÷ D=2 × 324 × 6.97 ÷ 457=9.9MPa.Then the safe-working pressure of the first oil and gas pipes is 9.9MPa.
For the second implementation, following steps (A) to (F) can be passed through and realize, comprise:
(A): obtain guideline life corresponding to the first oil and gas pipes, normal intensity design system, standard weld coefficient and standard yield strength and current tenure of use;
Wherein, guideline life refers to the operable time limit of oil and gas pipes; The Intensity Design system that normal intensity design ratio is corresponding when referring to that oil and gas pipes dispatches from the factory; The weld joint factor that standard weld coefficient is corresponding when referring to that oil and gas pipes dispatches from the factory; Yield strength corresponding when standard yield strength refers to that oil and gas pipes dispatches from the factory.
Wherein, normal intensity design ratio, standard weld coefficient and standard yield strength can carry out arranging and changing according to standard, are not specifically limited in embodiments of the present invention to normal intensity design ratio, standard weld coefficient and standard yield strength.
Such as, according to the regulation of standard GB50253-2003 " Oil Transportation Pipeline Engineering design specifications " and standard SY/T0015.1-98 " crude oil and natural-gas transfer pipeline Crossing Engineering design specifications ", general area outside transfer station, normal intensity design ratio F gets 0.72.According to the regulation of standard GB50253-2003 " Oil Transportation Pipeline Engineering design specifications ", grade of steel is that the Steel tube standard weld joint factor E of L450 gets 1.0.When assessing oil and gas pipes, standard yield strength σ
sget 450 megapascal (MPa) MPa.
(B): the ratio calculating current tenure of use and guideline life, time limit parameter is obtained;
The time of the use of the first oil and gas pipes is longer, the security of the first oil and gas pipes is poorer, in this step, obtain the time of making the product of the first oil and gas pipes, according to the time of making the product and the current time of the first oil and gas pipes, calculate the current tenure of use of the first oil and gas pipes, calculate the ratio of current tenure of use and guideline life, obtain time limit parameter.
Calculate the difference at the time of making the product of current time and the first oil and gas pipes, can directly using the current tenure of use of this difference as the first oil and gas pipes; If this difference is not integer, can using the current tenure of use of the integral part of this difference as the first oil and gas pipes, also the integral part of this difference can be added one as current tenure of use of the first oil and gas pipes.
(C): calculate current first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength according to time limit parameter, normal intensity design ratio, standard weld coefficient and standard yield strength;
Step (C) can pass through following steps (C-1) and (C-2) realizes, and comprising:
(C-1): obtain the position residing for the first oil and gas pipes, according to position acquisition environmental parameter;
Before this step, the corresponding relation of memory location and environmental parameter; In this step, obtain the position residing for the first oil and gas pipes, from the corresponding relation of position and environmental parameter, obtain environmental parameter according to this position.
(C-2): environmentally parameter, time limit parameter, normal intensity design ratio, standard weld coefficient and standard yield strength calculate current first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength.
The product of computing environment parameter, time limit parameter and normal intensity design ratio, obtains the Intensity Design coefficient that current first oil and gas pipes is corresponding; The product of computing environment parameter, time limit parameter and standard weld coefficient, obtains the weld joint factor that current first oil and gas pipes is corresponding; The product of computing environment parameter, time limit parameter and standard yield strength, obtains the yield strength that current first oil and gas pipes is corresponding.
(D): the product calculating current first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength, obtains the maximum stress that the first oil and gas pipes can bear;
(E): the product calculating maximum stress, minimum thickness and the numerical value 2 that the first oil and gas pipes can bear;
(F): the ratio calculating the overall diameter of product and the first oil and gas pipes, obtains the safe-working pressure of oil and gas pipes.
Step 207: judge whether the safe-working pressure of the first oil and gas pipes is greater than the current of oil and gas pipes and bears working pressure, if so, performs step 208; If not, step 209 is performed;
Step 208: determine that the first oil and gas pipes is safe, terminates;
Step 209: determine that the first oil and gas pipes is unsafe.
Such as, the safe-working pressure of the first oil and gas pipes is 9.9MPa, when the first oil and gas pipes current bear working pressure be greater than 9.9MPa time, determine that this first oil and gas pipes is unsafe; When the first oil and gas pipes current bear working pressure be not more than 9.9MPa time, determine that this first oil and gas pipes is safe.
In embodiments of the present invention, determine the multiple measurement points on the first oil and gas pipes, multiple measurement point is evenly distributed on the first oil and gas pipes; Weak Magnetic testi is carried out to each measurement point in multiple measurement point, obtains the stress that each measurement point is corresponding; Measurement point stress being greater than default value is defined as stress concentration point, and according to stress concentration point, the first oil and gas pipes is divided into multiple second oil and gas pipes; Scanning thickness measuring is carried out to each second oil and gas pipes in multiple second oil and gas pipes, obtains the thickness of each second oil and gas pipes; The minimum thickness of minimum thickness as the first oil and gas pipes is selected from the thickness of each second oil and gas pipes; The safe-working pressure of the first oil and gas pipes is calculated according to the minimum thickness of the first oil and gas pipes; Safe-working pressure according to the first oil and gas pipes carries out safety assessment to the first oil and gas pipes, thus safety assessment is carried out in the damage that can realize oil and gas pipes is potential, and the method is safe and reliable, is suitable for the safety assessment of long-distance oil & gas pipeline.
Embodiment 3
The invention provides the apparatus structure schematic diagram of a kind of oil-gas pipeline safety assessment.See Fig. 3, wherein, this device comprises:
First determination module 301, for determining the multiple measurement points on the first oil and gas pipes, multiple measurement point is evenly distributed on the first oil and gas pipes;
Detection module 302, for carrying out weak Magnetic testi to each measurement point in multiple measurement point, obtains the stress that each measurement point is corresponding;
Second determination module 303, is defined as stress concentration point for measurement point stress being greater than default value, and according to stress concentration point, the first oil and gas pipes is divided into multiple second oil and gas pipes;
Thickness measuring module 304, for carrying out scanning thickness measuring to each second oil and gas pipes in multiple second oil and gas pipes, obtains the thickness of each second oil and gas pipes;
Choose module 305, for selecting the minimum thickness of minimum thickness as the first oil and gas pipes in the thickness from each second oil and gas pipes;
Computing module 306, for calculating the safe-working pressure of the first oil and gas pipes according to the minimum thickness of the first oil and gas pipes;
Evaluation module 307, carries out safety assessment for the safe-working pressure according to the first oil and gas pipes to the first oil and gas pipes.
Preferably, computing module 306, comprising:
First acquiring unit, for obtaining standard thickness corresponding to the first oil and gas pipes, normal intensity design ratio, standard weld coefficient and standard yield strength;
First computing unit, for calculating the ratio of minimum thickness and standard thickness, obtains thickness parameter;
Second computing unit, for calculating current first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength according to thickness parameter, normal intensity design ratio, standard weld coefficient and standard yield strength;
3rd computing unit, for calculating the product of current first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength, obtains the maximum stress that the first oil and gas pipes can bear;
4th computing unit, for calculating the product of maximum stress, minimum thickness and the numerical value 2 that the first oil and gas pipes can bear;
5th computing unit, for calculating the ratio of the overall diameter of product and the first oil and gas pipes, obtains the safe-working pressure of oil and gas pipes.
Preferably, computing module 306, comprising:
Second acquisition unit, for obtaining guideline life corresponding to the first oil and gas pipes, normal intensity design system, standard weld coefficient and standard yield strength and current tenure of use;
6th computing unit, for calculating the ratio of current tenure of use and guideline life, obtains time limit parameter;
7th computing unit, for calculating current first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength according to time limit parameter, normal intensity design ratio, standard weld coefficient and standard yield strength;
8th computing unit, for calculating the product of current first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength, obtains the maximum stress that the first oil and gas pipes can bear;
9th computing unit, for calculating the product of maximum stress, minimum thickness and the numerical value 2 that the first oil and gas pipes can bear;
Tenth computing unit, for calculating the ratio of the overall diameter of product and the first oil and gas pipes, obtains the safe-working pressure of oil and gas pipes.
Preferably, the 7th computing unit, comprising:
Obtain subelement, for obtaining the position residing for the first oil and gas pipes, according to position acquisition environmental parameter;
Computation subunit, for environmentally parameter, time limit parameter, normal intensity design ratio, standard weld coefficient and standard yield strength calculate current first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength.
Preferably, the first determination module 301, comprising:
First determining unit, for determining multiple circumference on the first oil and gas pipes, the distance between every two adjacent circumferential in multiple circumference is equal;
Second determining unit, circumferentially determine for each in multiple circumference multiple measurement points that interval is equal, and line between in every two adjacent circumferential one measurement point circumferentially and another each measurement point is circumferentially not parallel with the central shaft of the first oil and gas pipes.
First determination module 301 also comprises: sampling unit, determines multiple circumference for controlling the first determining unit on the first oil and gas pipes, also circumferentially determines for controlling each in multiple circumference of the second determining unit multiple measurement points that interval is equal.
In embodiments of the present invention, determine the multiple measurement points on the first oil and gas pipes, multiple measurement point is evenly distributed on the first oil and gas pipes; Weak Magnetic testi is carried out to each measurement point in multiple measurement point, obtains the stress that each measurement point is corresponding; Measurement point stress being greater than default value is defined as stress concentration point, and according to stress concentration point, the first oil and gas pipes is divided into multiple second oil and gas pipes; Scanning thickness measuring is carried out to each second oil and gas pipes in multiple second oil and gas pipes, obtains the thickness of each second oil and gas pipes; The minimum thickness of minimum thickness as the first oil and gas pipes is selected from the thickness of each second oil and gas pipes; The safe-working pressure of the first oil and gas pipes is calculated according to the minimum thickness of the first oil and gas pipes; Safe-working pressure according to the first oil and gas pipes carries out safety assessment to the first oil and gas pipes, thus safety assessment is carried out in the damage that can realize oil and gas pipes is potential, and the method is safe and reliable, is suitable for the safety assessment of long-distance oil & gas pipeline.
It should be noted that: the device of the oil-gas pipeline safety assessment that above-described embodiment provides is when oil-gas pipeline safety is assessed, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, inner structure by device is divided into different functional modules, to complete all or part of function described above.In addition, the embodiment of the method that the device of the oil-gas pipeline safety assessment that above-described embodiment provides and oil-gas pipeline safety are assessed belongs to same design, and its specific implementation process refers to embodiment of the method, repeats no more here.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method for oil-gas pipeline safety assessment, it is characterized in that, described method comprises:
Determine the multiple measurement points on the first oil and gas pipes, described multiple measurement point is evenly distributed on described first oil and gas pipes;
Weak Magnetic testi is carried out to each measurement point in described multiple measurement point, obtains the stress that described each measurement point is corresponding;
Measurement point stress being greater than default value is defined as stress concentration point, and according to described stress concentration point, described first oil and gas pipes is divided into multiple second oil and gas pipes;
Scanning thickness measuring is carried out to each second oil and gas pipes in described multiple second oil and gas pipes, obtains the thickness of described each second oil and gas pipes;
The minimum thickness of minimum thickness as described first oil and gas pipes is selected from the thickness of described each second oil and gas pipes;
The safe-working pressure of described first oil and gas pipes is calculated according to the minimum thickness of described first oil and gas pipes;
Safe-working pressure according to described first oil and gas pipes carries out safety assessment to described first oil and gas pipes.
2. the method for claim 1, is characterized in that, the described minimum thickness according to described first oil and gas pipes calculates the safe-working pressure of described first oil and gas pipes, comprising:
Obtain standard thickness corresponding to described first oil and gas pipes, normal intensity design ratio, standard weld coefficient and standard yield strength;
Calculate the ratio of described minimum thickness and described standard thickness, obtain thickness parameter;
Current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength is calculated according to described thickness parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength;
Calculate the product of current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength, obtain the maximum stress that described first oil and gas pipes can bear;
Calculate the product of maximum stress, described minimum thickness and the numerical value 2 that described first oil and gas pipes can bear;
Calculate the ratio of the overall diameter of described product and described first oil and gas pipes, obtain the safe-working pressure of described oil and gas pipes.
3. the method for claim 1, is characterized in that, the described minimum thickness according to described first oil and gas pipes calculates the safe-working pressure of described first oil and gas pipes, comprising:
Obtain guideline life corresponding to described first oil and gas pipes, normal intensity design system, standard weld coefficient and standard yield strength and current tenure of use;
Calculate the ratio of described current tenure of use and described guideline life, obtain time limit parameter;
Current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength is calculated according to described time limit parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength;
Calculate the product of current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength, obtain the maximum stress that described first oil and gas pipes can bear;
Calculate the product of maximum stress, described minimum thickness and the numerical value 2 that described first oil and gas pipes can bear;
Calculate the ratio of the overall diameter of described product and described first oil and gas pipes, obtain the safe-working pressure of described oil and gas pipes.
4. method as claimed in claim 3, it is characterized in that, described Intensity Design coefficient, weld joint factor and the yield strength corresponding according to current described first oil and gas pipes of described time limit parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength calculating, comprising:
Obtain the position residing for described first oil and gas pipes, according to described position acquisition environmental parameter;
Current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength is calculated according to described environmental parameter, described time limit parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength.
5. the method for claim 1, is characterized in that, the described multiple measurement points determined on the first oil and gas pipes, comprising:
First oil and gas pipes determines multiple circumference, and the distance between every two adjacent circumferential in described multiple circumference is equal;
Each in described multiple circumference circumferentially determines multiple measurement points that interval is equal, and line between in described every two adjacent circumferential one measurement point circumferentially and another each measurement point is circumferentially not parallel with the central shaft of described first oil and gas pipes.
6. a device for oil-gas pipeline safety assessment, it is characterized in that, described device comprises:
First determination module, for determining the multiple measurement points on the first oil and gas pipes, described multiple measurement point is evenly distributed on described first oil and gas pipes;
Detection module, for carrying out weak Magnetic testi to each measurement point in described multiple measurement point, obtains the stress that described each measurement point is corresponding;
Second determination module, is defined as stress concentration point for measurement point stress being greater than default value, and according to described stress concentration point, described first oil and gas pipes is divided into multiple second oil and gas pipes;
Thickness measuring module, for carrying out scanning thickness measuring to each second oil and gas pipes in described multiple second oil and gas pipes, obtains the thickness of described each second oil and gas pipes;
Choose module, for selecting the minimum thickness of minimum thickness as described first oil and gas pipes in the thickness from described each second oil and gas pipes;
Computing module, for calculating the safe-working pressure of described first oil and gas pipes according to the minimum thickness of described first oil and gas pipes;
Evaluation module, carries out safety assessment for the safe-working pressure according to described first oil and gas pipes to described first oil and gas pipes.
7. device as claimed in claim 6, it is characterized in that, described computing module, comprising:
First acquiring unit, for obtaining standard thickness corresponding to described first oil and gas pipes, normal intensity design ratio, standard weld coefficient and standard yield strength;
First computing unit, for calculating the ratio of described minimum thickness and described standard thickness, obtains thickness parameter;
Second computing unit, for calculating current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength according to described thickness parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength;
3rd computing unit, for calculating the product of current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength, obtains the maximum stress that described first oil and gas pipes can bear;
4th computing unit, for calculating the product of maximum stress, described minimum thickness and numerical value 2 that described first oil and gas pipes can bear;
5th computing unit, for calculating the ratio of the overall diameter of described product and described first oil and gas pipes, obtains the safe-working pressure of described oil and gas pipes.
8. device as claimed in claim 6, it is characterized in that, described computing module, comprising:
Second acquisition unit, for obtaining guideline life corresponding to described first oil and gas pipes, normal intensity design system, standard weld coefficient and standard yield strength and current tenure of use;
6th computing unit, for calculating the ratio of described current tenure of use and described guideline life, obtains time limit parameter;
7th computing unit, for calculating current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength according to described time limit parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength;
8th computing unit, for calculating the product of current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength, obtains the maximum stress that described first oil and gas pipes can bear;
9th computing unit, for calculating the product of maximum stress, described minimum thickness and numerical value 2 that described first oil and gas pipes can bear;
Tenth computing unit, for calculating the ratio of the overall diameter of described product and described first oil and gas pipes, obtains the safe-working pressure of described oil and gas pipes.
9. device as claimed in claim 8, it is characterized in that, described 7th computing unit, comprising:
Obtain subelement, for obtaining the position residing for described first oil and gas pipes, according to described position acquisition environmental parameter;
Computation subunit, for calculating current described first oil and gas pipes corresponding Intensity Design coefficient, weld joint factor and yield strength according to described environmental parameter, described time limit parameter, described normal intensity design ratio, described standard weld coefficient and described standard yield strength.
10. device as claimed in claim 6, it is characterized in that, described first determination module, comprising:
First determining unit, for determining multiple circumference on the first oil and gas pipes, the distance between every two adjacent circumferential in described multiple circumference is equal;
Second determining unit, circumferentially determine for each in described multiple circumference multiple measurement points that interval is equal, and line between in described every two adjacent circumferential one measurement point circumferentially and another each measurement point is circumferentially not parallel with the central shaft of described first oil and gas pipes.
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