CN107590324A - High-pressure gas double-wall pipe stress and elastic support thermal expansion curve assay method - Google Patents
High-pressure gas double-wall pipe stress and elastic support thermal expansion curve assay method Download PDFInfo
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- CN107590324A CN107590324A CN201710758343.8A CN201710758343A CN107590324A CN 107590324 A CN107590324 A CN 107590324A CN 201710758343 A CN201710758343 A CN 201710758343A CN 107590324 A CN107590324 A CN 107590324A
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Abstract
The present invention provides a kind of high-pressure gas double-wall pipe stress and elastic support thermal expansion curve assay method, according to actual condition, determine every technical parameter of double-wall pipe, so as to carry out high-pressure gas double-wall pipe move towards design, compensated in the place design L-shaped pipeline or Z-shaped pipeline of stress concentration and carry out finite Element Stress calculating, ensure high-pressure gas supply air line connection and reasonable arrangement, check whether stress and elastic support thermal expansion curve of the double-wall pipe under design conditions meet code requirement, again by the online stress-strain test system of high-pressure gas double-wall pipe to host-initiated, operation and the stress in stopping process and thermal expansion curve carry out test and contrasted with FEM calculation value, so that high-pressure gas supply air line arrangement is extremely reasonable.
Description
Technical field
The present invention relates to high-pressure gas double-wall pipe Stress calculation technical field, more particularly to a kind of high-pressure gas double-wall pipe
Stress and elastic support thermal expansion curve assay method.
Background technology
With the requirement that increasingly stricter discharge limits, shipowner increasingly payes attention to the economy and clean environment firendly of ship,
Presently the most ripe and economical alternative energy source is undoubtedly natural gas.With《International aerodynamic force ship rule》Day
Become ripe, make gas fuel Power Vessel more and more concerned, not only on the natural gas carrier vessel of world navigation, also large-scale
The fields such as container ship, oil tanker, large-scale ore carrier and cruise are also promoted, and dual fuel engine and gas engine are as new
Type ship power set are also developed rapidly.
Required according to related specifications, its gas supply system need to use double-walled pipeline form at machine, and inner tube is as combustion
Letter shoot road, outer tube (sleeve pipe) pass through the work of air exhauster, it is ensured that let out when combustion gas occurs in inner tube as divulging information and purging pipeline
During dew, the combustion gas of leakage can be excluded in time, prevent that gas concentration is too high, produce the danger of blast.
Pipeline of the high-pressure gas double-wall pipe as the conveying fuel gas such as natural gas or ethane, its limiting temperature is reachable-
90 DEG C, operating pressure reaches 42MPa, and whole piping thermal stress is big, therefore whole pipeline uses flexible design；Between inner tube and outer tube
Also connected using elastic support, absorb thermal expansion curve, external vibration and stress caused by the inner and outer pipes temperature difference using natural resiliency
Deng.But high-pressure gas supply air line whether connection and reasonable arrangement, and stress of the double-wall pipe under design conditions and elastic support heat
Whether expansion displacement meets code requirement, in the prior art without rational assay method.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of high-pressure gas double-wall pipe stress and elastic support thermal expansion position
Assay method is moved, to overcome the drawbacks described above of prior art.
To achieve the above object, the present invention provides a kind of high-pressure gas double-wall pipe stress and elastic support thermal expansion curve point
Evaluation method is analysed, high-pressure gas double-wall pipe includes outer tube and inner tube, and elastic support is between the outer tube and said inner tube, institute
State and fixed support and sliding support are additionally provided with outer tube, comprise the following steps：
S1, determine the allowable stress range of high-pressure gas double-wall pipe pipeline, the fatigue limit shift value of elastic support；
S2, according to actual condition, determine every technical parameter of double-wall pipe；
S3, the technical parameter according to step S2, carry out high-pressure gas double-wall pipe moves towards design, in the place of stress concentration
Design L-shaped pipeline or Z-shaped pipeline compensate；
S4, creates the FEM model of high-pressure gas double-wall pipe, and sequentially inputs every technical parameter in step S2；
S5, according to the position moved towards design and determine fixed support, sliding support and elastic support respectively of double-wall pipe, and
Fixed support, sliding support and three-dimensional coordinate point corresponding to elastic support, coordinate points are set to set up in FEM model respectively
Into rear input sliding support and the technical parameter of elastic support；
S6, FEM calculation is carried out, draw the thermal expansion of the stress value and elastic support of each node of high-pressure gas double-wall pipe
Shift value；
The stress value of each node of high-pressure gas double-wall pipe is calculated in S7, judgment step S6 whether in allowable stress range
Interior, whether the thermal expansion curve value of elastic support is less than fatigue limit shift value, as judged result is undesirable, repeats above-mentioned
Step S3 to S6, until judged result meets the requirements.
Preferably, in step S2, every technical parameter of double-wall pipe, including installation temperature, design temperature, design pressure,
Calculating standard, double-wall pipe external diameter, wall thickness, material, double-wall pipe internal flow density, insulating materials and thickness, elbow data, ship
The technical parameter of hogging and sagging and hull acceleration.
Preferably, in step S4, the finite element mould of high-pressure gas double-wall pipe is created using CAESARII Stress Analysis Softwares
Type.
Preferably, in step S5, the technical parameter of sliding support includes the frictional force of sliding support, the technology of elastic support
Parameter includes the rigidity of elastic support.
Preferably, including step S8, to move towards design arrangement high-pressure gas according to the double-wall pipe finally determined in step S7 double
Wall pipe, the stress value of each node of high-pressure gas double-wall pipe and the thermal expansion curve of elastic support are measured using strain measurement system
Value, it is ensured that measured value is less than FEM calculation value.
Preferably, high-pressure gas double-wall pipe includes double-walled pipe bend, and the strain measurement system includes being located on outer tube
Outer tube foil gauge, outer tube displacement transducer and fixed support foil gauge, set inner tube foil gauge on inner pipe and inner tube displacement passes
Sensor, elbow foil gauge, signal conditioner, statical strain indicator, data analysis system and the computer being located on double-walled pipe bend,
The outer tube foil gauge, outer tube displacement transducer, fixed support foil gauge, inner tube foil gauge, inner tube displacement transducer and elbow
Foil gauge is connected by cable with signal conditioner respectively, and the signal conditioner is connected with the statical strain indicator, described quiet
State deformeter is connected with the data analysis system, and the data analysis system is connected with the computer.
Preferably, the double-walled pipe bend includes outer pipe bend and interior pipe bend, and the outer tube foil gauge is located at close to institute
The position of outer pipe bend is stated, said inner tube foil gauge is located at close to the position of said inner tube elbow.
Preferably, the outer tube displacement transducer and said inner tube displacement transducer are close to the elastic support.
Preferably, the outer tube is provided with cock, and the cable in the double-wall pipe stretches out from the cock.
As described above, high-pressure gas double-wall pipe stress of the present invention and elastic support thermal expansion curve assay side
Method, have the advantages that：The present invention carries out finite Element Stress calculating to high-pressure gas double-wall pipe deployment scenarios, it is ensured that high pressure
Gas supply pipeline connection and reasonable arrangement, checks whether stress and elastic support thermal expansion curve of the double-wall pipe under design conditions meet
Code requirement, then by the online stress-strain test system of high-pressure gas double-wall pipe in host-initiated, operation and stopping process
Stress and thermal expansion curve carry out test contrasted with FEM calculation value so that high-pressure gas supply air line arrangement extremely
Rationally.
Brief description of the drawings
Fig. 1 arranges schematic diagram for strain measurement system in the present invention.
Fig. 2 moves towards schematic diagram for double-wall pipe in the present invention
Component label instructions
1 outer tube
11 outer tube foil gauges
12 outer tube displacement transducers
13 cocks
2 inner tubes
21 inner tube foil gauges
22 inner tube displacement transducers
3 elastic supports
4 fixed supports
41 fixed support foil gauges
5 sliding supports
61 signal conditioners
62 statical strain indicators
63 data analysis systems
64 computers
65 cables
7 double-walled pipe bends
71 elbow foil gauges
72 outer pipe bends
Pipe bend in 73
Embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., only coordinating specification to be taken off
The content shown, so that those skilled in the art understands and reads, the enforceable qualifications of the present invention are not limited to, therefore
Do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, do not influenceing the present invention
Under the effect of can be generated and the purpose that can reach, it all should still fall and obtain the model that can cover in disclosed technology contents
In enclosing.Meanwhile cited such as " on ", " under ", "left", "right", the term of " centre " in this specification, it is merely convenient to chat
That states understands, and is not used to limit the enforceable scope of the present invention, and its relativeness is altered or modified, and skill is being changed without essence
Held in art, when being also considered as the enforceable category of the present invention.
As depicted in figs. 1 and 2, the present invention provides a kind of high-pressure gas double-wall pipe stress and elastic support thermal expansion curve point
Analyse evaluation method, high-pressure gas double-wall pipe includes outer tube 1 and inner tube 2, elastic support 3 be located at the outer tube 1 and said inner tube 2 it
Between, the interference of elastic support 3 is arranged between outer tube 1 and inner tube 2, absorbs thermal expansion caused by the inner and outer pipes temperature difference using natural resiliency
Displacement, external vibration and stress etc., specifically refer to Application No. ZL201720007666.9, entitled double-walled tubular elastic
The Chinese utility model patent of support dynamic fatigue test device, in the patent fatigue limit position for also disclosing elastic support
Shifting value method of testing；Fixed support 4 and sliding support 5 are additionally provided with the outer tube 1, fixed support 4 and sliding support 5 are used for branch
Double-wall pipe is supportted, the position of sliding support 5 is arranged according to cabin space, and position is adjustable, and high-pressure gas double-wall pipe includes double-walled
Pipe bend 7.
High-pressure gas double-wall pipe stress and elastic support thermal expansion curve assay method comprise the following steps：
S1, with reference to high-pressure gas double-wall pipe pipeline stress technique standard, determine that the allowable of high-pressure gas double-wall pipe pipeline should
Power scope；Using the fatigue limit shift value of double-wall pipe elastic support dynamic fatigue test device testing elastic support.
S2, according to actual condition, determine every technical parameter of double-wall pipe.Every technical parameter of double-wall pipe, including peace
Fill temperature, the design temperature of outer tube 1 and inner tube 2, the design pressure of outer tube 1 and inner tube 2, calculate standard, outer tube 1 and inner tube 2
External diameter and wall thickness, the material of outer tube 1 and inner tube 2, internal flow density, insulating materials and thickness, the elbow of outer tube 1 and inner tube 2
The technical parameter of data, ship hogging and sagging and hull acceleration etc..
S3, the technical parameter according to step S2, carry out high-pressure gas double-wall pipe moves towards design, in the place of stress concentration
Design L-shaped pipeline or Z-shaped pipeline are compensated, and pipe design elbow is generally made to the shape of whole double-wall pipe in stress concentration
It is L-shaped or Z-shaped, so that whole pipeline has enough flexibilities.
S4, creates the FEM model of high-pressure gas double-wall pipe, and sequentially inputs every technical parameter in step S2.At this
In step, CAESARII Stress Analysis Softwares or ANSYS finite element analysis softwares etc. can be utilized to create high-pressure gas double-walled
The FEM model of pipe.
S5, fixed support 4, sliding support 5 and bullet are determined according to the landing point on design and ship that moves towards of double-wall pipe respectively
The position of property support 3, and set respectively three corresponding to fixed support 4, sliding support 5 and elastic support 3 in FEM model
Dimension coordinate point, coordinate points input the technical parameter of sliding support 5 and elastic support 3 after being provided with.The technology ginseng of sliding support 5
Number includes the frictional force of sliding support 5, and the technical parameter of elastic support 3 includes the rigidity of elastic support 3.
After S6, step S5 coordinate points and technical parameter are provided with, FEM calculation is carried out to high-pressure gas double-wall pipe,
The stress value of each node of high-pressure gas double-wall pipe and the thermal expansion curve value of elastic support 3 are drawn, wherein elastic support 3 is hot swollen
Swollen displacement is the shift differences of inner tube 2 corresponding to the place node of elastic support 3 and outer tube 1 in elastic support expansion direction；
The stress value of each node of high-pressure gas double-wall pipe is calculated in S7, judgment step S6 whether in allowable stress range
Interior, whether the thermal expansion curve value of elastic support 3 is less than fatigue limit shift value, as judged result is undesirable, in repetition
Step S3 to S6 is stated, until judged result meets the requirements.
S8, design arrangement high-pressure gas double-wall pipe is moved towards according to the double-wall pipe finally determined in step S7, surveyed using strain
The stress value of test system measurement each node of high-pressure gas double-wall pipe and the thermal expansion curve value of elastic support 3, it is ensured that measured value is small
In FEM calculation value.
A kind of preferred embodiment of strain measurement system presented below：
Strain measurement system includes outer tube foil gauge 11, outer tube displacement transducer 12 and the fixed support being located on outer tube 1
Foil gauge 41, the inner tube foil gauge 21 being located in inner tube 2 and inner tube displacement transducer 22, the elbow being located on double-walled pipe bend 7
Foil gauge 71, signal conditioner 61, statical strain indicator 62, data analysis system 63 and computer 64, the outer tube foil gauge 11,
Outer tube displacement transducer 12, fixed support foil gauge 41, inner tube foil gauge 21, inner tube displacement transducer 22 and elbow foil gauge 71
It is connected respectively by cable 65 with signal conditioner 61, the signal conditioner 61 is connected with the statical strain indicator 62, described
Statical strain indicator 62 is connected with the data analysis system 63, and the data analysis system 63 is connected with the computer 64.Its
Middle external tube foil gauge 11, inner tube foil gauge 21, elbow foil gauge 71 and fixed support foil gauge 41 are used to test adaptability to changes, outer tube
Displacement transducer 12 and inner tube displacement transducer 22 are used for the thermal expansion curve value for measuring elastic support 3；The data analysis system
The computer extender card that system 63 realizes data acquisition function, by the analog signal after signal condition become data signal pass through it is various
Interface is shown on computer 15, and data is analyzed；The signal conditioner 61 selects charge amplifier defeated to sensor
The voltage analog signal gone out is amplified, filtering；The computer 64 is used to record, store and analyze through data analysis system 63
The data of collection, the data stress and strain value that data analysis system obtains is shown by means of various computer software.
As illustrated in fig. 1, it is preferred that the double-walled pipe bend 7 includes outer pipe bend 72 and interior pipe bend 73, the outer tube should
Become piece 11 to be located at close to the position of the outer pipe bend 72, said inner tube foil gauge 21 is located at close to the position of said inner tube elbow 73
Put, 11 points of outer tube foil gauge be welded in high-pressure gas double-wall pipe outer tube 1 with 2 corresponding position of inner tube；The spot welding of elbow foil gauge 71
In the elbow of stress concentration；At the outer tube at fixed support 4 that 41 points of fixed support foil gauge is welded in stress concentration；Outer tube position
22 points of displacement sensor 12 and inner tube displacement transducer be welded in high-pressure gas double-wall pipe outer tube 1 with 2 corresponding position of inner tube, and
Close to elastic support 3.Preferably, the outer tube 1 is provided with cock 13, and the cock 13 is opened at outer pipe bend 72 or other
Near position to be measured, stretched out in the cable aperture that the cable 65 in the double-wall pipe opens up from the cock 13, and use filler
Letter seals.
High-pressure gas double-wall pipe stress-strain test mode is as follows
1. the straight length of outer tube 1, inner tube 2, outer pipe bend 72, elastic support 3 and cock that will be completed according to drawing making
13 are ready to；
2. the outer surface of inner tube 2 is cleaned out, the spot welding of inner tube foil gauge 21 is in inner tube specified location；
3. inner tube is inserted into outer pipe bend, it is set to reach specified location, the cable tail of inner tube foil gauge 21 is curved from outer tube
Drawn in cock 13 on first 72, it is good with cable packing box seal after lead is drawn at cock 13.
4. elastic support 3 is fixed on the specified location of inner tube 2
5. two straight lengths of outer tube 1 are installed to specified location, then two straight lengths of outer tube 1 are curved with outer tube respectively
First 72 argon arc welding is welded, and Non-Destructive Testing and tightness test are carried out to weld seam
6. the outer surface of outer tube 1 is cleaned out, 41 points of outer tube foil gauge 11, elbow foil gauge 71 and fixed support foil gauge
It is welded in outer tube specified location；
7. by outer tube foil gauge 11, inner tube foil gauge 21, the cable of elbow foil gauge 71 and fixed support foil gauge 41 is led
Line connection signal conditioner 61, statical strain indicator 62 and data analysis system 63；
8. data analysis system 63 carries out Treatment Analysis to the data of collection, the ess-strain value drawn is shown in computer
On 64.
9. contrast test value should be less than FEM calculation value
In summary, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (9)
1. a kind of high-pressure gas double-wall pipe stress and elastic support thermal expansion curve assay method, high-pressure gas double-wall pipe bag
Outer tube (1) and inner tube (2) are included, elastic support (3) is between the outer tube (1) and said inner tube (2), on the outer tube (1)
It is additionally provided with fixed support (4) and sliding support (5), it is characterised in that comprise the following steps：
S1, determine the allowable stress range of high-pressure gas double-wall pipe pipeline, the fatigue limit shift value of elastic support；
S2, according to actual condition, determine every technical parameter of double-wall pipe；
S3, the technical parameter according to step S2, carry out high-pressure gas double-wall pipe moves towards design, in the place design of stress concentration
L-shaped pipeline or Z-shaped pipeline compensate；
S4, creates the FEM model of high-pressure gas double-wall pipe, and sequentially inputs every technical parameter in step S2；
S5, according to the position moved towards design and determine fixed support (4), sliding support (5) and elastic support (3) respectively of double-wall pipe
Put, and fixed support (4), sliding support (5) and three-dimensional coordinate corresponding to elastic support (3) are set respectively in FEM model
Point, coordinate points input the technical parameter of sliding support (5) and elastic support (3) after being provided with；
S6, FEM calculation is carried out, draws the stress value of each node of high-pressure gas double-wall pipe and the thermal expansion position of elastic support (3)
Shifting value；
The stress value of each node of high-pressure gas double-wall pipe is calculated in S7, judgment step S6 whether in allowable stress range, bullet
Property support (3) thermal expansion curve value whether be less than fatigue limit shift value, as judged result is undesirable, repeat above-mentioned step
Rapid S3 to S6, until judged result meets the requirements.
2. high-pressure gas double-wall pipe stress according to claim 1 and elastic support thermal expansion curve assay method,
It is characterized in that：In step S2, every technical parameter of double-wall pipe, including installation temperature, design temperature, design pressure, calculating
Standard, double-wall pipe external diameter, wall thickness, material, double-wall pipe internal flow density, insulating materials and thickness, elbow data, ship hogging
In hang down and hull acceleration technical parameter.
3. high-pressure gas double-wall pipe stress according to claim 1 and elastic support thermal expansion curve assay method,
It is characterized in that：In step S4, the FEM model of high-pressure gas double-wall pipe is created using CAESARII Stress Analysis Softwares.
4. high-pressure gas double-wall pipe stress according to claim 1 and elastic support thermal expansion curve assay method,
It is characterized in that：In step S5, the technical parameter of sliding support (5) includes the frictional force of sliding support (5), elastic support (3)
Technical parameter include the rigidity of elastic support (3).
5. high-pressure gas double-wall pipe stress according to claim 1 and elastic support thermal expansion curve assay method,
It is characterized in that：Including step S8, design arrangement high-pressure gas double-wall pipe is moved towards according to the double-wall pipe finally determined in step S7,
The stress value of each node of high-pressure gas double-wall pipe and the thermal expansion curve value of elastic support (3) are measured using strain measurement system,
Ensure that measured value is less than FEM calculation value.
6. high-pressure gas double-wall pipe stress according to claim 5 and elastic support thermal expansion curve assay method,
It is characterized in that：High-pressure gas double-wall pipe includes double-walled pipe bend (7), and the strain measurement system includes being located on outer tube (1)
Outer tube foil gauge (11), outer tube displacement transducer (12) and fixed support foil gauge (41), the inner tube that is located in inner tube (2) should
Become piece (21) and inner tube displacement transducer (22), the elbow foil gauge (71), the signal conditioner that are located on double-walled pipe bend (7)
(61), statical strain indicator (62), data analysis system (63) and computer (64), the outer tube foil gauge (11), outer tube displacement
Sensor (12), fixed support foil gauge (41), inner tube foil gauge (21), inner tube displacement transducer (22) and elbow foil gauge
(71) it is connected respectively by cable (65) with signal conditioner (61), the signal conditioner (61) and the statical strain indicator
(62) connect, the statical strain indicator (62) is connected with the data analysis system (63), the data analysis system (63) and
Computer (64) connection.
7. high-pressure gas double-wall pipe stress according to claim 6 and elastic support thermal expansion curve assay method,
It is characterized in that：The double-walled pipe bend (7) includes outer pipe bend (72) and interior pipe bend (73), the outer tube foil gauge (11)
It is located at close to the position of the outer pipe bend (72), said inner tube foil gauge (21) is located at close to the position of said inner tube elbow (73)
Put.
8. high-pressure gas double-wall pipe stress according to claim 6 and elastic support thermal expansion curve assay method,
It is characterized in that：The outer tube displacement transducer (12) and said inner tube displacement transducer (22) are close to the elastic support
(3)。
9. high-pressure gas double-wall pipe stress according to claim 6 and elastic support thermal expansion curve assay method,
It is characterized in that：The outer tube (1) is provided with cock (13), and the cable (65) in double-wall pipe stretches out from the cock (13).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710758343.8A CN107590324B (en) | 2017-08-29 | 2017-08-29 | Analysis and evaluation method for stress of high-pressure gas double-wall pipe and thermal expansion displacement of elastic support |
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| CN201710758343.8A CN107590324B (en) | 2017-08-29 | 2017-08-29 | Analysis and evaluation method for stress of high-pressure gas double-wall pipe and thermal expansion displacement of elastic support |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108870086A (en) * | 2018-09-11 | 2018-11-23 | 中国石油工程建设有限公司 | A kind of straight gathering line thermal walking complex control system of length and method |
| CN110748702A (en) * | 2019-10-30 | 2020-02-04 | 广船国际有限公司 | Reinforced structure arrangement method of ship pipeline system |
| CN112149332A (en) * | 2020-09-27 | 2020-12-29 | 大唐东北电力试验研究院有限公司 | Safety state evaluation method for steam-water pipeline supporting and hanging system of thermal power plant |
| CN113127999A (en) * | 2021-05-13 | 2021-07-16 | 江南造船(集团)有限责任公司 | Stress and strength evaluation method of double-wall pipe flange |
| CN113128000A (en) * | 2021-05-13 | 2021-07-16 | 江南造船(集团)有限责任公司 | Method for evaluating stress and rigidity of double-wall pipe flange |
| CN113158379A (en) * | 2021-05-13 | 2021-07-23 | 江南造船(集团)有限责任公司 | Inherent frequency analysis and evaluation method for marine gas double-wall pipe |
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| EP3051198A1 (en) * | 2015-01-28 | 2016-08-03 | United Technologies Corporation | Doubled wall pipe flange and coupling configuration |
| CN206356749U (en) * | 2017-01-04 | 2017-07-28 | 江南造船(集团)有限责任公司 | High-pressure gas double-wall pipe weld monitoring system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3051198A1 (en) * | 2015-01-28 | 2016-08-03 | United Technologies Corporation | Doubled wall pipe flange and coupling configuration |
| CN206356749U (en) * | 2017-01-04 | 2017-07-28 | 江南造船(集团)有限责任公司 | High-pressure gas double-wall pipe weld monitoring system |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108870086A (en) * | 2018-09-11 | 2018-11-23 | 中国石油工程建设有限公司 | A kind of straight gathering line thermal walking complex control system of length and method |
| CN108870086B (en) * | 2018-09-11 | 2023-12-29 | 中国石油工程建设有限公司 | Long direct collection and transmission pipeline thermal displacement integrated control system and method |
| CN110748702A (en) * | 2019-10-30 | 2020-02-04 | 广船国际有限公司 | Reinforced structure arrangement method of ship pipeline system |
| CN110748702B (en) * | 2019-10-30 | 2021-05-28 | 广船国际有限公司 | Reinforced structure arrangement method of ship pipeline system |
| CN112149332A (en) * | 2020-09-27 | 2020-12-29 | 大唐东北电力试验研究院有限公司 | Safety state evaluation method for steam-water pipeline supporting and hanging system of thermal power plant |
| CN113127999A (en) * | 2021-05-13 | 2021-07-16 | 江南造船(集团)有限责任公司 | Stress and strength evaluation method of double-wall pipe flange |
| CN113128000A (en) * | 2021-05-13 | 2021-07-16 | 江南造船(集团)有限责任公司 | Method for evaluating stress and rigidity of double-wall pipe flange |
| CN113158379A (en) * | 2021-05-13 | 2021-07-23 | 江南造船(集团)有限责任公司 | Inherent frequency analysis and evaluation method for marine gas double-wall pipe |
| CN113128000B (en) * | 2021-05-13 | 2023-01-13 | 江南造船(集团)有限责任公司 | Method for evaluating stress and rigidity of double-wall pipe flange |
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| Publication number | Publication date |
|---|---|
| CN107590324B (en) | 2020-09-25 |
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