CN114165681A - Cold insulation construction method for LNG duplex tube set - Google Patents
Cold insulation construction method for LNG duplex tube set Download PDFInfo
- Publication number
- CN114165681A CN114165681A CN202111420629.8A CN202111420629A CN114165681A CN 114165681 A CN114165681 A CN 114165681A CN 202111420629 A CN202111420629 A CN 202111420629A CN 114165681 A CN114165681 A CN 114165681A
- Authority
- CN
- China
- Prior art keywords
- cold insulation
- insulation layer
- lng
- layer
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 113
- 238000010276 construction Methods 0.000 title claims abstract description 32
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000011888 foil Substances 0.000 claims description 14
- 239000011491 glass wool Substances 0.000 claims description 10
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 10
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 239000004814 polyurethane Substances 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000003566 sealing material Substances 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 239000004035 construction material Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 68
- 239000012774 insulation material Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/021—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves
- F16L59/022—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves with a single slit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/021—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves
- F16L59/024—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves composed of two half sleeves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a cold insulation construction method of an LNG duplex tube set, wherein the LNG duplex tube set comprises two pipelines which are symmetrically arranged and a cold insulation layer for wrapping each pipeline, and the cold insulation layer sequentially comprises a first cold insulation layer and a second cold insulation layer from inside to outside; positioning and arranging two pipelines at a center distance through a hole distance positioner, and then removing the hole distance positioner; wrapping a first cold insulation layer at the outer edge of each pipeline; wrapping a second cold insulation layer at the outer edge of the first cold insulation layer of each pipeline; and bonding and wrapping the two pipelines. The method of simultaneously coating two pipelines is adopted, so that the cold insulation construction time is shortened, and the construction efficiency is improved; the construction material is few, support is few, aluminum plate material is few, material saving, and the cold insulation effect is good, has improved cold insulation effect and later maintenance work, reduces the maintenance cost.
Description
Technical Field
The invention relates to the technical field of cold insulation construction of LNG low-temperature pipelines, in particular to a cold insulation construction method of an LNG duplex tube set.
Background
The cold insulation construction of the low-temperature pipeline is an important link in a low-temperature pipeline engineering project, the pipeline can be protected to continuously convey low-temperature media, and heat exchange with surrounding media is prevented so as to avoid loss. The cold insulation device of the pipeline generally comprises a cold insulation layer, a moisture-proof layer, a protective layer, a pipeline support and the like. In the traditional LNG pipeline construction, especially in the cold insulation construction of duplex pipe groups (the medium is the same, the working condition is consistent, and the cold insulation requirement is consistent), a single-pipe independent coating mode is adopted, and after one pipeline finishes cold insulation coating and supporting, the construction of the other pipeline can be carried out. Therefore, the construction amount and the construction consumables are relatively large, and the subsequent maintenance cost is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a cold insulation construction method of an LNG duplex pipe set, which can improve the cold insulation construction efficiency and effect.
In order to achieve the purpose, the cold insulation construction method of the LNG duplex tube set comprises the steps that the LNG duplex tube set comprises two pipelines which are symmetrically arranged and a cold insulation layer used for wrapping each pipeline, and the cold insulation layer sequentially comprises a first cold insulation layer and a second cold insulation layer from inside to outside; the concrete construction process is as follows:
1) positioning and arranging two pipelines at a center distance through a hole distance positioner, and then removing the hole distance positioner;
2) wrapping a first cold insulation layer at the outer edge of each pipeline;
3) wrapping a second cold insulation layer at the outer edge of the first cold insulation layer of each pipeline;
4) and bonding and wrapping the two pipelines.
Furthermore, the method also comprises the step of laying a layer of aluminum foil paper on the outer layer of the two cold insulation layers.
Furthermore, a layer of aluminum plate is paved outside the aluminum foil paper.
Furthermore, the aluminum plate is padded with a tetrafluoroethylene plate below the aluminum plate, and channel steel is padded below the tetrafluoroethylene plate.
Further, in step 1), the pitch locator includes a positioning plate and positioning holes symmetrically formed at two ends of the positioning plate, and the center pitch of the two positioning holes is (the outer radius of the single pipe + the thickness of the cold insulation layer) × 2.
Further, the specific implementation process of the step 2) is as follows:
preparing two groups of first cold insulation layers by using a PIR material, wherein each group of first cold insulation layers comprises two arc-shaped rings with the same size, and the inner diameter of each arc-shaped ring is the same as the outer diameter of the pipeline;
wrapping two arc rings in a group on the excircle of a pipeline, and leaving a first layer of gap between the two arc rings, wherein the first layer of gap is positioned in the vertical direction; filling and bonding the first layer of gaps by using glass wool coated with polyurethane adhesive; after the bonding is finished, wrapping and fixing the first cold insulation layer by using an aluminum foil paper strip until the first cold insulation layer is tightly attached; the other pipe is wrapped in the same way.
Further, the specific implementation process of the step 3) is as follows:
preparing two groups of second cold insulation layers by using a PIR material, wherein each group of second cold insulation layers comprises two U-shaped rings with the same size, and the side surface of the inner end of each U-shaped ring and the bottom surface of the inner end are both planes; the inner circle radius of each U-shaped ring is the same as the outer circle radius of the arc-shaped ring;
wrapping two U-shaped rings in one group on the outer circle of a first layer of cold insulation layer of a pipeline, and reserving a second gap between the two U-shaped rings, wherein the second gap is positioned in the horizontal direction; filling the second gap with glass wool coated with polyurethane binder; the wrapping method of the second cold insulation layer of the other pipeline is the same.
Further, the specific implementation process of the step 4) is as follows:
after the two pipelines are coated by the second cold insulation layer, a third gap is reserved between the inner end horizontal planes of the two groups of second cold insulation layers, and the third gap is filled with glass wool coated with polyurethane adhesive; after the two cold insulation layers are bonded, the aluminum foil paper strips for external use on the second cold insulation layer are wrapped and fixed until the second cold insulation layer is tightly attached.
Further, the joint position of the aluminum plate is arranged below the pipeline, the joint is in an arch bridge type overlapping mode, the lowest point of the arch bridge type overlapping is fixed through a rivet, and meanwhile, the rivet and the lap joint are coated with sealing materials.
Furthermore, a U-shaped groove is formed in the middle of the tetrafluoroethylene plate, and the rivet is located in the U-shaped groove.
Compared with the prior art, the invention has the following advantages: the method for simultaneously coating two pipelines is adopted, so that the cold insulation construction time is shortened, and the construction efficiency is improved; the construction material is few, support is few, aluminum plate material is few, material saving, and the cold insulation effect is good, has improved cold insulation effect and later maintenance work, reduces the maintenance cost.
Drawings
FIG. 1 is a schematic view of a positioning structure of two pipes and a pitch locator;
FIG. 2 is a schematic view of a first cold insulation layer wrapping structure;
FIG. 3 is a schematic fill view of FIG. 2;
FIG. 4 is a schematic view of a second cold insulation layer wrapping structure;
FIG. 5 is a schematic view of the completion of wrapping two second cold insulation layers;
FIG. 6 is a schematic diagram of the bonding of two second cold-insulation layers;
FIG. 7 is a schematic view of an aluminum foil wrap;
FIG. 8 is a schematic view of an aluminum plate wrapping;
figure 9 is a schematic view of a tetrafluoroethylene sheet and channel support.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The cold insulation construction method of the LNG duplex tube set comprises two pipelines which are symmetrically arranged and a cold insulation layer used for wrapping each pipeline, wherein the cold insulation layer sequentially comprises a first cold insulation layer and a second cold insulation layer from inside to outside. The concrete construction process is as follows:
1) as shown in fig. 1, two pipelines 1 are arranged with center distance by a pitch locator 2, and then the pitch locator is removed
The pitch locator comprises a locating plate and locating holes symmetrically arranged at two ends of the locating plate, and the central pitch of the two locating holes is (the excircle radius of a single pipeline plus the thickness of a cold insulation layer) multiplied by 2.
2) The outer edge of each pipeline is wrapped with a first cold insulation layer 6
The specific implementation process shown in fig. 2 and 3 is as follows:
preparing two groups of first cold insulation layers 6 by using a PIR material (PIR is polyester foam), wherein each group of first cold insulation layers 6 comprises two arc-shaped rings 4 with the same size, and the inner diameter of each arc-shaped ring 4 is the same as the outer diameter of the pipeline 1;
wrapping two arc rings in a group on the excircle of a pipeline, and leaving a first layer gap 4 of 3-5 mm between the two arc rings, wherein the first layer gap 4 is positioned in the vertical direction; meanwhile, filling and bonding are carried out on the first layer gap 4 by using glass wool 5 coated with polyurethane adhesive; after the bonding is finished, the first cold insulation layer 6 is wrapped and fixed by an aluminum foil paper strip until the first cold insulation layer 6 is tightly attached. The other pipe is wrapped in the same way.
The glass wool has good elasticity and good heat insulation performance, and can actively adapt to the thermal expansion and cold contraction deformation of the PIR cold insulation material.
3) The outer edge of the first cold insulation layer of each pipeline is wrapped by the second cold insulation layer
The specific implementation process shown in fig. 4 is as follows:
preparing two groups of second cold insulation layers 9 by using a PIR material, wherein each group of second cold insulation layers 9 comprises two U-shaped rings 7 with the same size, and the side surface of the inner end and the bottom surface of the inner end of each U-shaped ring 7 are both planes; the inner circle radius of each U-shaped ring 7 is the same as the outer circle radius of the arc-shaped ring 4;
wrapping two U-shaped rings 7 in one group on the outer circle of a first cold insulation layer 6 of a pipeline, wherein a second gap 8 with the thickness of 3-5 mm is reserved between the two U-shaped rings 7, and the second gap 8 is positioned in the horizontal direction, so that the first gap 4 of the first cold insulation layer 6 and the second gap 8 of a second cold insulation layer 9 are staggered by 90 degrees; meanwhile, the second gap 8 is filled with glass wool 5 coated with polyurethane adhesive, so that the upper U-shaped ring 7 and the lower U-shaped ring 7 can be tightly attached to the first cold insulation layer 6; the wrapping method of the second cold insulation layer of the other pipeline is the same.
4) Two pipelines are bonded and wrapped
The specific process shown in fig. 5 and 6 is as follows:
after the two pipelines 2 are coated by the second cold insulation layers 9, a third gap 10 of 3-5 mm is reserved between the inner end horizontal planes of the two second cold insulation layers 9, and glass wool 5 coated with polyurethane adhesive is filled in the third gap 10 to ensure firm bonding; after the two cold insulation layers are bonded, the second cold insulation layer 9 is wrapped and fixed by an aluminum foil paper strip until the second cold insulation layer 9 is tightly attached.
5) A layer of aluminum foil paper 11 is laid on the outer layer of the two cold insulation layers
As shown in fig. 7, a layer of aluminum foil paper is used as a moisture-proof layer to cover all the PIR cold-insulation material, so as to prevent external rainwater and moisture from entering and avoid influencing the heat insulation performance of the PIR cold-insulation material.
6) A layer of 3-5 mm aluminum plate 12 is laid outside the aluminum foil paper 11
The joint position of the aluminum plate 12 is arranged below the pipeline as shown in fig. 8, so that the pipeline is prevented from being washed by rainwater; the joint type is an arch bridge type lap joint, the lowest point of the arch bridge type lap joint is fixed by a rivet 13, and meanwhile, the rivet 13 and the lap joint are coated with sealing materials to prevent rainwater from permeating.
7) The tetrafluoroethylene sheet 14 is padded under the aluminum sheet
As shown in fig. 9, the tetrafluoroethylene sheet 14 has a U-shaped groove in the middle, which reduces the contact area between the upper surface and the aluminum sheet and improves the stability of the support; the rivet 13 is located U type inslot, plays certain sealed and guard action to the rivet, further prevents the rainwater infiltration.
8) The tetrafluoroethylene sheet is padded with channel steel 15
And supporting by using channel steel as shown in fig. 9 again, so that the pipeline and the support are movably connected, and the cold-shrinkage deformation of the pipeline is automatically adapted.
Claims (10)
1. A cold insulation construction method of an LNG duplex pipe set is characterized by comprising the following steps: the LNG duplex tube set comprises two pipelines which are symmetrically arranged and a cold insulation layer used for wrapping each pipeline, and the cold insulation layer sequentially comprises a first cold insulation layer and a second cold insulation layer from inside to outside; the concrete construction process is as follows:
1) positioning and arranging two pipelines at a center distance through a hole distance positioner, and then removing the hole distance positioner;
2) wrapping a first cold insulation layer at the outer edge of each pipeline;
3) wrapping a second cold insulation layer at the outer edge of the first cold insulation layer of each pipeline;
4) and bonding and wrapping the two pipelines.
2. The cold insulation construction method of the LNG duplex tube bank as claimed in claim 1, wherein: and the outer layer of the two cold insulation layers is paved with a layer of aluminum foil paper.
3. The cold insulation construction method of the LNG duplex tube bank as claimed in claim 2, wherein: and a layer of aluminum plate is laid outside the aluminum foil paper.
4. The cold insulation construction method of the LNG duplex tube bank as claimed in claim 3, wherein: still include to fill up the tetrafluoroethylene board in aluminum plate's below, fill up the channel-section steel under the tetrafluoroethylene board.
5. The cold insulation construction method of the LNG duplex tube bank as claimed in claim 1, wherein: in the step 1), the pitch locator includes a locating plate and locating holes symmetrically formed at two ends of the locating plate, and the center pitch of the two locating holes is (the excircle radius of a single pipeline plus the thickness of the cold insulation layer) × 2.
6. The cold insulation construction method of the LNG duplex tube bank as claimed in claim 1, wherein: the specific implementation process of the step 2) is as follows:
preparing two groups of first cold insulation layers by using a PIR material, wherein each group of first cold insulation layers comprises two arc-shaped rings with the same size, and the inner diameter of each arc-shaped ring is the same as the outer diameter of the pipeline;
wrapping two arc rings in a group on the excircle of a pipeline, and leaving a first layer of gap between the two arc rings, wherein the first layer of gap is positioned in the vertical direction; filling and bonding the first layer of gaps by using glass wool coated with polyurethane adhesive; after the bonding is finished, wrapping and fixing the first cold insulation layer by using an aluminum foil paper strip until the first cold insulation layer is tightly attached; the other pipe is wrapped in the same way.
7. The cold insulation construction method of the LNG duplex tube bank as claimed in claim 1, wherein: the specific implementation process of the step 3) is as follows:
preparing two groups of second cold insulation layers by using a PIR material, wherein each group of second cold insulation layers comprises two U-shaped rings with the same size, and the side surface of the inner end of each U-shaped ring and the bottom surface of the inner end are both planes; the inner circle radius of each U-shaped ring is the same as the outer circle radius of the arc-shaped ring;
wrapping two U-shaped rings in one group on the outer circle of a first layer of cold insulation layer of a pipeline, and reserving a second gap between the two U-shaped rings, wherein the second gap is positioned in the horizontal direction; filling the second gap with glass wool coated with polyurethane binder; the wrapping method of the second cold insulation layer of the other pipeline is the same.
8. The cold insulation construction method of the LNG duplex tube bank as claimed in claim 1, wherein: the specific implementation process of the step 4) is as follows:
after the two pipelines are coated by the second cold insulation layer, a third gap is reserved between the inner end horizontal planes of the two groups of second cold insulation layers, and the third gap is filled with glass wool coated with polyurethane adhesive; after the two cold insulation layers are bonded, the aluminum foil paper strips for external use on the second cold insulation layer are wrapped and fixed until the second cold insulation layer is tightly attached.
9. The cold insulation construction method of the LNG duplex tube bank as claimed in claim 3, wherein: the joint position of the aluminum plate is arranged below the pipeline, the joint is in an arch bridge type lap joint mode, the lowest point of the arch bridge type lap joint is fixed through a rivet, and meanwhile, the rivet and the lap joint position are coated with sealing materials.
10. The cold insulation construction method of the LNG duplex tube bank as claimed in claim 4, wherein: the middle of the tetrafluoroethylene plate is provided with a U-shaped groove, and the rivet is positioned in the U-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111420629.8A CN114165681A (en) | 2021-11-26 | 2021-11-26 | Cold insulation construction method for LNG duplex tube set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111420629.8A CN114165681A (en) | 2021-11-26 | 2021-11-26 | Cold insulation construction method for LNG duplex tube set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114165681A true CN114165681A (en) | 2022-03-11 |
Family
ID=80481071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111420629.8A Pending CN114165681A (en) | 2021-11-26 | 2021-11-26 | Cold insulation construction method for LNG duplex tube set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114165681A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1325788A (en) * | 1970-08-07 | 1973-08-08 | Quassowski Kempf I | Insulated pipe and a method for the laying of pipes |
| EP0670451A2 (en) * | 1994-03-03 | 1995-09-06 | Anton Steindl | Multi-pipe assembly |
| EP1213527A2 (en) * | 2000-12-05 | 2002-06-12 | Roland Baumann | Device for the insulation of multiple pipes |
| CN104896216A (en) * | 2014-03-06 | 2015-09-09 | 文安上元中宇科技有限公司 | High-density polyethylene corrugated outer protection pipe and double pipe heat insulation pipeline |
| CN109027526A (en) * | 2018-09-13 | 2018-12-18 | 山东艾菲尔管业有限公司 | Central heating prefabricated thermal insulation plastic conduit |
| CN208474641U (en) * | 2018-05-21 | 2019-02-05 | 山东汇通能源利用集团有限公司 | It is a kind of for improving the supporting structure of LNG cryogenic piping cold insulation effect |
| CN109606568A (en) * | 2018-07-26 | 2019-04-12 | 沪东中华造船(集团)有限公司 | A kind of sealing structure of Type B containment system collets junction |
| CN208764472U (en) * | 2018-09-13 | 2019-04-19 | 临沂市阳光热力有限公司 | A kind of jet chimney bracket of low-loss |
| CN209540224U (en) * | 2018-11-23 | 2019-10-25 | 昊天节能装备有限责任公司 | A kind of two-tube small-bore insulating tube |
| CN111720630A (en) * | 2020-06-12 | 2020-09-29 | 江苏中圣管道工程技术有限公司 | LNG low-temperature prefabricated cold insulation pipe and manufacturing method thereof |
-
2021
- 2021-11-26 CN CN202111420629.8A patent/CN114165681A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1325788A (en) * | 1970-08-07 | 1973-08-08 | Quassowski Kempf I | Insulated pipe and a method for the laying of pipes |
| EP0670451A2 (en) * | 1994-03-03 | 1995-09-06 | Anton Steindl | Multi-pipe assembly |
| EP1213527A2 (en) * | 2000-12-05 | 2002-06-12 | Roland Baumann | Device for the insulation of multiple pipes |
| CN104896216A (en) * | 2014-03-06 | 2015-09-09 | 文安上元中宇科技有限公司 | High-density polyethylene corrugated outer protection pipe and double pipe heat insulation pipeline |
| CN208474641U (en) * | 2018-05-21 | 2019-02-05 | 山东汇通能源利用集团有限公司 | It is a kind of for improving the supporting structure of LNG cryogenic piping cold insulation effect |
| CN109606568A (en) * | 2018-07-26 | 2019-04-12 | 沪东中华造船(集团)有限公司 | A kind of sealing structure of Type B containment system collets junction |
| CN109027526A (en) * | 2018-09-13 | 2018-12-18 | 山东艾菲尔管业有限公司 | Central heating prefabricated thermal insulation plastic conduit |
| CN208764472U (en) * | 2018-09-13 | 2019-04-19 | 临沂市阳光热力有限公司 | A kind of jet chimney bracket of low-loss |
| CN209540224U (en) * | 2018-11-23 | 2019-10-25 | 昊天节能装备有限责任公司 | A kind of two-tube small-bore insulating tube |
| CN111720630A (en) * | 2020-06-12 | 2020-09-29 | 江苏中圣管道工程技术有限公司 | LNG low-temperature prefabricated cold insulation pipe and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 戴斌: "LNG场站低温工艺设备及管道安装工程实践", 《安装工程》, vol. 38, no. 5, 31 May 2016 (2016-05-31), pages 602 - 604 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7226243B2 (en) | Load-bearing, lightweight, and compact super-insulation system | |
| JPH01210690A (en) | Conduit for transferring cryogenic medium | |
| WO2006034653A1 (en) | Carbon fiber composite for repairing and reinforcing pipelines having defects and the method of application | |
| CN113266711A (en) | Prefabricated soft thermal insulation pipe | |
| CN103231869B (en) | Thermal insulation structure of thermal medium storage tank and thermal medium pipe of solar photo-thermal power generation system | |
| CN104110556B (en) | Joint coating repairing anticorrosion layer structure for in-service pipeline | |
| CN103912734A (en) | Directly buried prefabricated heat-insulation high-temperature hot water tube and production method thereof | |
| CN103383053B (en) | The insulating structure part of pipeline | |
| CN210800458U (en) | Flexible joint for prefabricated overhead heat-insulation pipe | |
| CN110469748B (en) | Prefabricated overhead low-energy-consumption steam pipe network long-distance conveying system | |
| CN114165681A (en) | Cold insulation construction method for LNG duplex tube set | |
| CN213954578U (en) | Intermittent prefabricated overhead heat-insulating pipe | |
| CN214744196U (en) | Soft and hard combined type heat preservation structure of overhead steam pipeline | |
| CN114811270B (en) | High-efficiency heat-preservation and heat-insulation material and preparation method thereof | |
| CN101832448B (en) | Heat insulation layer structure | |
| CN210240925U (en) | Buried medium pipeline with anti-freezing and damp-proof effects | |
| CN213576249U (en) | Pipeline insulation structure | |
| CN105179849A (en) | Anti-sedimentation joint structure of buried heat preservation steel pipes and construction method of anti-sedimentation joint structure | |
| CN201982883U (en) | Polyurethane heat insulation joint for steel pipe protect | |
| CN117386896B (en) | Environment-friendly prefabricated heat-insulating pipeline based on foaming hardening in sleeve and preparation method thereof | |
| CN117386895B (en) | Environment-friendly prefabricated heat-insulating pipeline based on double-layer hardening protective layers and preparation method thereof | |
| CN217634594U (en) | Non-corrosion double-protection direct-buried steam composite heat-insulation pipe | |
| CN220452976U (en) | Prefabricated high-temperature steam heat preservation pipe | |
| CN216242990U (en) | Strength-enhanced polyester ammonia direct-buried heat-insulation pipe | |
| CN212203619U (en) | Heat insulation pipeline for heat supply pipe network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |