CN1322265C - Gas pipe-line composite reinforcement construction and construction method thereof - Google Patents
Gas pipe-line composite reinforcement construction and construction method thereof Download PDFInfo
- Publication number
- CN1322265C CN1322265C CNB2004100933448A CN200410093344A CN1322265C CN 1322265 C CN1322265 C CN 1322265C CN B2004100933448 A CNB2004100933448 A CN B2004100933448A CN 200410093344 A CN200410093344 A CN 200410093344A CN 1322265 C CN1322265 C CN 1322265C
- Authority
- CN
- China
- Prior art keywords
- pipeline
- layer
- gas pipe
- reinforcement
- stiffener
- 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.)
- Expired - Fee Related
Links
Abstract
The present invention relates to a composite reinforcement structure of a coal gas pipeline and a construction method thereof. The reinforcement structure is coated outside a coal pipeline needing to be maintained, and comprises a main reinforcement piece and an auxiliary piece, wherein the main reinforcement piece is orderly composed of a protection layer of composite material, a composite material working layer embedded with a glass fiber reinforcement layer and a bottom adhesive layer for bonding the main reinforcement piece on the coal gas pipeline. An additive with effective corrosion inhibition effect is added to the bottom adhesive layer. The auxiliary piece comprises a reinforcement keel band and/or a special reinforcement piece suitable for the special requirement of the pipeline. The present invention comprises the construction steps: the thickness of a maintenance pipeline is measured, and the surface treatment and the leakage stopping treatment are carried out; a special position of the pipeline is treated, or the special reinforcement piece is fixed to the special position of the pipeline; the stainless steel keel band is attached; the bottom adhesive layer is coated, and the working layer and the reinforcement layer are covered; the protection layer is bonded. The reinforcement structure of the present invention has the advantages of light weight, high specific strength, low cost, easy construction, favorable anticorrosion performance, no open flame under construction, no high temperature and no influence on the pipeline, and has the function of corrosion inhibition.
Description
Technical field
The present invention relates to on-line maintenance technology the strengthening structure when specifically finger carries out on-line maintenance to the overhead gas pipe that is corroded at the labour overhead gas pipe.
Background technique
Gas pipe line can produce serious corrosion phenomenon owing to the length that is subjected to the various corrosive materials in the coal gas corrodes all the year round, washes away, and brings hidden danger to safety in production.But because the general equal equipment pipeline not of coal gas trunk line pipeline, its significance does not allow again to shut down, stop the supple of gas or steam, and can not take the way of pipe interior maintenance, therefore requires to keep in repair under the state that band temperate zone pressure is not stopped.Present method for maintaining is to carry out reinforcement at the duct bottom 1/3 part welding 6mm steel plate that damages.Because damage and often be accompanied by pipe perforation and gas leakage, there is potential safety hazard in the naked light during welding; Simultaneously, the Plate Steel that gets on of welding brings bigger additional load to the support of supporting flue; Moreover, because welding high temperature forms the variation of thermal stress and metallographic structure on pipeline, can quicken Corrosion of Pipeline.
Summary of the invention
The objective of the invention is to propose a kind of gas pipe-line composite reinforcement construction and method of construction thereof, this strengthening structure is to adopt composite material, when existing gas pipe line is keeped in repair, not only has anticorrosive effect, and in light weight, the specific strength height is not generally employed naked light in the construction, no high temperature, no thermal stress can overcome the deficiencies in the prior art.
Another object of the present invention is to propose a kind of gas pipe-line composite reinforcement construction with corrosion inhibition, owing to added inhibition ingredient in the primer of this strengthening structure, can slow down the expansion in parent corrosive pipeline zone, thereby slow down Corrosion of Pipeline speed.
Design of the present invention is: because the operating conditions of strengthening structure is abominable, so, strengthening structure is not only to satisfy various requirement with a kind of homogenous material, but select for use the material of different qualities compound, form a kind of anticorrosion and composite structure strengthening action of having concurrently, so not only performance is easy to adjust and control, also is beneficial to reduce cost, and simplifies the operation.
A kind of gas pipe-line composite reinforcement construction of the present invention, be coated on outside the gas pipe line that needs maintenance, comprise main stiffener and auxiliary, described main stiffener successively by the composite material protective coating, be embedded with the composite material work layer of glass fibre reinforced layer and the primer layer that main stiffener is adhered on the gas pipe line formed; Described auxiliary comprises the reinforcement keel band that can strengthen pipeline body intensity and/or the special-purpose stiffener that adapts to the pipeline ad hoc requirement.
Described main stiffener is made up of protective coating, working lining and reinforced layer, primer layer: wherein
Protective coating-outermost surface, good by anti-atmospheric aging, water repelling property, can weaken ultraviolet ray the composite material of the degradation of adhesive is made, working lining is played protective action;
Working lining-mesosphere is made by composite material corrosion-resistant, that intensity is high, the life-span is long, and the mechanical structure of original pipeline is played strengthening action, is embedded with reinforced layer therebetween;
Reinforced layer-be embedded in the middle of the working lining is glass fibre reinforcement net and the stiffening rib layer of cloth of one deck through special processing, can effectively strengthen the bearing capacity of working lining, alleviates stress and concentrates, and plays the effect that strengthens the working lining physical and mechanical properties;
Primer layer-innermost layer, its effect are that whole stiffener is bonded on the gas pipe line body, can satisfy the requirement with transition of adhering to steel, and the linear expansion coeffcient close with steel, good chemical stability and corrosion resistance are arranged.
Can also be in primer layer suitably interpolation do not participate in the adhesive chemical reaction, to the additive of pipeline steel main body to effective corrosion mitigating effect, after the tube wall perforation, the aggressive medium contact glue-line of pipe interior, with recessive corrosion inhibitor effect wherein, around perforation, form the inhibition atmosphere, can slow down the expansion in parent corrosive pipeline zone, thereby slow down the coal gas medium Corrosion of Pipeline speed.
The main component of described corrosion inhibition additive is sodium carbonate (NaCO
3), potash bichromate (K
2Cr
2O
7), plutonium carbonate ammonium (C
6H
11NH
2)
2H
2CO
3Based on the primer base-material, its addition is by weight: sodium carbonate 0.3-0.6%, potash bichromate 0.5-3%, plutonium carbonate be ammonium 0.8-1%.Because described corrosion inhibitor is enclosed in the working lining of parent pipeline outer wall and main stiffener effectively, corrosion inhibitor is inoperative when the parent pipeline is puncherless, when the parent pipeline produces local perforations, media, condensed water in the pipe etc. contact with corrosion inhibitor in the primer layer, produce regional corrosion inhibition, slowed down parent Corrosion of Pipeline speed.
Described reinforcement keel band is made up of the direct corrosion-resistant stainless steel band and the special-purpose tight locking button of banding on pipeline body, reinforcement keel band and the main stiffener of banding on pipeline body carries out reinforcement to the mechanical structure of original pipeline jointly, guarantees that pipeline keeps certain overall construction intensity and pipeline does not take place caves in.
Guarantee that pipeline keeps certain overall construction intensity and pipeline does not take place caves in by force.
Described special-purpose stiffener is the pointed special stiffener designed according to different repairing positions.
The method of construction of gas pipe line strengthening structure, its construction sequence is:
(1) to keeping in repair the pipeline body thickness measuring and carrying out surface treatment and the leak stopping processing;
(2) privileged sites of pipeline are handled or the special-purpose stiffener of fixing tube privileged sites;
(3) stamp stainless steel keel band;
(4) coat primer layer, working lining and reinforced layer are covered in the shop,
(5) bonding protective coating.
Compare with welding 6mm steel plate holder benefit, the invention has the advantages that: in light weight, the specific strength height, with low cost, easy construction has corrosion inhibition, and antiseptic property is good.Its weight only is 1/10～1/12 of steel plate, can effectively alleviate the impost load at duty pipeline network; Because repairing the overwhelming majority is operation under the normal temperature, need not to employ naked light, thereby reduce disaster hidden-trouble and Yin Gaowen changes to thermal stress and the metallographic structure that in-service pipeline causes, effectively prolonged pipeline working life; And under the effect at corrosion inhibitor after the tube wall perforation, can slow down the expansion in parent corrosive pipeline zone, slow down the coal gas medium Corrosion of Pipeline speed.
Description of drawings
Now the invention will be further described in conjunction with several embodiments and accompanying drawing thereof.
Fig. 1 is a straight length strengthening structure schematic representation of the present invention;
Fig. 2 is a bend loss strengthening structure schematic representation;
Fig. 3 is conduit bracket supporting position strengthening structure schematic representation;
Fig. 4 is a STEAM TRAP connection part strengthening structure schematic representation.
Among the figure: 1 gas pipe line body, 2 primer layers, 3 reinforced layers, 4 working linings, 5 protective coatings, 6 stainless steel keel bands, 7 keel are with lock to link closely, the splicing welding joint of 8 bend pipe bodies, 9 interior reinforced layers, 10 wear-resisting steel plates, 11 composite layers, 12 pipe-supporting carriages, 13 waste pipes, piece together steel plate taper joint, 16 spot welding positions, A master's stiffener for 15 pairs.
Embodiment
Embodiment 1: straight length strengthening structure (see figure 1)
When the gas pipe line straight length is repaired, adopt main stiffener A and reinforcement keel band 6 to be used.Described main stiffener A is coated on outside the gas pipe line that needs maintenance, by protective coating 5, working lining 4 and reinforced layer 3, and on the primer layer pipeline body 1, jointly the mechanical structure of original pipeline is carried out reinforcement with main stiffener A.The outermost surface of main stiffener A is a protective coating 5, and is good by anti-atmospheric aging, water repelling property, can weaken ultraviolet ray the composite material of the degradation of adhesive is made; The centre is a working lining 4, make by intensity height, composite material corrosion-resistant, that the life-span is long, can play strengthening action to original pipeline, to guarantee the bulk strength of pipeline, accompany reinforced layer 3 in the working lining, reinforced layer is glass fiber mesh and the fibre cloth through special processing that is added in the working lining, can effectively strengthen the bearing capacity of working lining, the intensity of enhancing working lining, innermost layer is a primer layer 2, by primer layer main stiffener is sticked on the gas pipe line body 1.
During repairing, to keeping in repair pipeline body 1 thickness measuring and carrying out surface treatment and the leak stopping processing, stamp stainless steel keel band 6 then earlier, coat primer layer 2 again, working lining 4 and reinforced layer 3, last bonding protective coating 5 are covered in the shop.
Embodiment 2: bend loss strengthening structure (see figure 2).
To the repairing of bend loss, earlier corner bead 8 places to be handled especially, with main stiffener A bend loss is repaired again.Promptly elder generation is at weld seam 8 places of crooked pipeline body; increase the interior reinforced layer 9 that one deck adopts glass fibre and structure glue to make; its outermost protective coating 5 then is to be spliced according to the prefabricated component that pipe shape cuts out, to guarantee that working lining 4 is formed effectively protection.
Embodiment 3: conduit bracket supporting position strengthening structure (see figure 3)
Aerial pipeline will support with carriage 12 every a segment distance, owing to expand with heat and contract with cold, pipeline 1 can produce slippage at the bearing bracket place, so the stiffener at bearing bracket place has specific (special) requirements to wear resistance.When being repaired, this position adopt main stiffener A and special-purpose stiffener to be used.The main stiffener A that is adopted is similar to the main stiffener of straight length, and special-purpose stiffener is made up of wear-resisting steel plate 10 and composite layer 11.
During repairing, with composite layer 11 wear-resisting steel plate 10 is sticked on the gas pipe line body 1 of supporting bracket 12 tops earlier, use corrosion-resistant stainless steel reinforcement keel band 6 fastening again.Composite layer 11 plays sealing and corrosion resistant effect; liner 10 of wear-resisting steel plates between pipeline 1 and supporting bracket 12 play 11 effects of protection composite layer; the one side that wear-resisting steel plate contacts with carriage will be passed through special electroplating processes, the wearing and tearing when sliding to reduce pipeline.
Embodiment 4: STEAM TRAP connection part strengthening structure (see figure 4)
STEAM TRAP is the device that is used for getting rid of condensed water in the gaspipe network and other sewage in the pipeline, and the corrosion in this zone is often comparatively serious.When being repaired, this position adopt main stiffener A and special-purpose stiffener to be used.Main stiffener is similar to straight length, special-purpose stiffener is a pair of assembly steel plate taper joint 15, this joint is consistent with the shape of STEAM TRAP connection part, its skin is formed assembly by half slit bamboo or chopped wood of two symmetries, each half slit bamboo or chopped wood is welded by half sheet straight tube 15a and the tubaeform Taper Pipe 15b of half sheet, described straight-tube portion is vertical mutually with the center line of conical pipe part, and internal layer is a composite layer, plays bonding, anticorrosion and impermeable role.
During construction, fully utilize gluing, spot welding taper joint 15 is fixed on the STEAM TRAP joint, again coated with the main stiffener of straight length.
Claims (9)
1. a gas pipe-line composite reinforcement construction is coated on outside the gas pipe line that needs maintenance, it is characterized in that this strengthening structure comprises:
-main stiffener: from outside to inside for the composite material protective coating, be embedded with the composite material work layer of reinforced layer and the primer layer that main stiffener is adhered on the gas pipe line formed; Described protective coating also can weaken ultraviolet ray by a kind of ageing-resistant, anti-water the degradation composite material of adhesive is made, described working lining by a kind of corrosion-resistant, can make the high strength composite that original pipeline plays strengthening action, reinforced layer is wherein made by glass fibre reinforcement net, the stiffening rib cloth of the bearing capacity that can effectively strengthen working lining;
-auxiliary: comprise with described main stiffener and jointly original pipeline carried out the reinforcement keel band of reinforcement, and be used between pipeline and supporting bracket special-purpose stiffener be used for the special-purpose stiffener of STEAM TRAP connection part.
2. gas pipe-line composite reinforcement construction according to claim 1, it is characterized in that: being added with sodium carbonate, potash bichromate, carbonic acid hexamethylene ammonium in the described primer layer is the corrosion inhibition additive of main component, described corrosion inhibitor is enclosed in the working lining between pipeline outer wall and the main stiffener effectively, when pipeline produces local perforations, medium, condensed water in the pipe contact with this corrosion inhibitor, produce regional corrosion inhibition, slowed down Corrosion of Pipeline speed.
3. gas pipe-line composite reinforcement construction according to claim 2 is characterized in that the addition of the corrosion inhibitor in the described primer layer is by weight: sodium carbonate 0.3-0.6%, potash bichromate 0.5-3%, carbonic acid hexamethylene ammonium 0.8-1%.
4. gas pipe-line composite reinforcement construction according to claim 1, it is characterized in that: described reinforcement keel band is made up of the direct corrosion-resistant stainless steel band and the tight locking button of banding on pipeline body, and described keel band links closely direct banding on pipeline body by keel are with lock.
5. gas pipe-line composite reinforcement construction according to claim 1, it is characterized in that: the outermost surface that is used for the described main stiffener of crooked pipeline is the prefabricated protective coating that cutting is spliced according to the crooked pipeline shape, within it layer interior reinforced layer that has one deck to be made by glass fibre and structure glue in the weld joint of crooked pipeline body.
6. gas pipe-line composite reinforcement construction according to claim 1, it is characterized in that the stiffener that is used between pipeline and supporting bracket is made up of composite layer and wear-resisting steel plate, this stiffener mat composite layer is bonded on the gas pipe line body of supporting bracket top, and is fastened on the gas pipe line body with reinforcement keel band.
7. gas pipe-line composite reinforcement construction according to claim 6 is characterized in that: the one side that described wear-resisting steel plate contacts with carriage is an electrodeposited coating.
8. gas pipe-line composite reinforcement construction according to claim 1, it is characterized in that: the special-purpose stiffener that is used for the STEAM TRAP connection part is the taper joint of a pair of assembly steel plate, this joint is consistent with the shape of STEAM TRAP connection part, its skin is formed assembly by half slit bamboo or chopped wood of two symmetries, each half slit bamboo or chopped wood is welded by half sheet straight tube and the tubaeform Taper Pipe of half sheet, described straight-tube portion is vertical mutually with the center line of conical pipe part, and internal layer is a composite layer.
9. the method for construction of a gas pipe-line composite reinforcement construction, its construction sequence is:
(1) to keeping in repair the pipeline body thickness measuring and carrying out surface treatment and the leak stopping processing;
(2) privileged sites of pipeline are handled or the stiffener of fixing tube privileged sites;
(3) stamp stainless steel keel band;
(4) coat primer layer, working lining and reinforced layer are covered in the shop;
(5) bonding protective coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100933448A CN1322265C (en) | 2004-12-21 | 2004-12-21 | Gas pipe-line composite reinforcement construction and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100933448A CN1322265C (en) | 2004-12-21 | 2004-12-21 | Gas pipe-line composite reinforcement construction and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1632363A CN1632363A (en) | 2005-06-29 |
| CN1322265C true CN1322265C (en) | 2007-06-20 |
Family
ID=34847718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100933448A Expired - Fee Related CN1322265C (en) | 2004-12-21 | 2004-12-21 | Gas pipe-line composite reinforcement construction and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1322265C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205999B (en) * | 2007-01-15 | 2011-04-13 | 北京安科管道工程科技有限公司 | Renovation reinforcement, reinforced and/or crack arrest technique for pipe |
| CN101579774B (en) * | 2008-05-15 | 2011-06-22 | 中国石油天然气股份有限公司 | On-line repairing-reinforcing structure for oil pipelines |
| CN102192383B (en) * | 2010-03-01 | 2012-11-07 | 五冶集团上海有限公司 | Online repair method for asbestos type expansion joint of pipeline |
| CN107588280B (en) * | 2017-10-24 | 2019-02-15 | 上海煤气第一管线工程有限公司 | Natural gas line expansive cylinder stopping transportation pressure method for blocking |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS542426Y1 (en) * | 1969-06-16 | 1979-02-01 | ||
| US4172912A (en) * | 1973-06-15 | 1979-10-30 | Sumitomo Metal Industries Limited | Process for adhering polyethylene to steel substrates |
| JPS58131931U (en) * | 1982-03-02 | 1983-09-06 | 松岡 信二 | Seal tape with markings for winding direction |
| CN85200472U (en) * | 1985-04-01 | 1985-12-20 | 刘公岛 | Wire with flat core and its cover |
| CN85200915U (en) * | 1985-04-01 | 1986-02-05 | 梁子材 | Multifunctional arithmetic toy |
| JPH06166140A (en) * | 1992-10-01 | 1994-06-14 | Sekisui Chem Co Ltd | Laminate and production thereof |
| US5348801A (en) * | 1992-05-22 | 1994-09-20 | Snam S.P.A. | Tape for reinforcing pressure-supporting hollow bodies and a method for repairing deteriorated pipes |
| JPH07186356A (en) * | 1986-10-20 | 1995-07-25 | Raychem Sa:Nv | Production of thermally recoverable article |
| CN1158582A (en) * | 1994-09-22 | 1997-09-03 | 斯南普罗吉蒂联合股票公司 | Method for restoring the functionality of equipment subjected to heavy corrosion in a plant for the prodn. of urea |
| CN1171986A (en) * | 1997-05-29 | 1998-02-04 | 王保东 | Method for manufacturing or repairing hydro-cylinder and pipeline using composite material |
| CN2339546Y (en) * | 1998-06-13 | 1999-09-22 | 中科(南宁)防化学腐蚀设计研究所 | Anti-corrosion anti-leakage heat-insulation oil-storage tank |
| CN2349210Y (en) * | 1998-11-20 | 1999-11-17 | 夏博平 | Butyl adhesive tape for sealing |
| CN1293157A (en) * | 1999-10-13 | 2001-05-02 | 任恒福 | Allochroic antiscale |
| JP2001175174A (en) * | 1999-12-17 | 2001-06-29 | Kyosei:Kk | Display tape with adhesive |
| JP2002097428A (en) * | 2000-09-25 | 2002-04-02 | Sekisui Chem Co Ltd | Water-stopping pressure-sensitive adhesive tape |
| CN2565886Y (en) * | 2002-08-29 | 2003-08-13 | 罗荣才 | Roof thermo-insulated water-proof covering plate |
| CN1457973A (en) * | 2003-05-30 | 2003-11-26 | 北京东方慧辰碳纤维科技有限公司 | Fiber reinforced drawn and extruded pipe with woven structure and its preparing method |
| CN1530463A (en) * | 2003-03-13 | 2004-09-22 | 中国第一汽车集团公司 | Non-nitrite water base antirusting agent |
-
2004
- 2004-12-21 CN CNB2004100933448A patent/CN1322265C/en not_active Expired - Fee Related
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS542426Y1 (en) * | 1969-06-16 | 1979-02-01 | ||
| US4172912A (en) * | 1973-06-15 | 1979-10-30 | Sumitomo Metal Industries Limited | Process for adhering polyethylene to steel substrates |
| JPS58131931U (en) * | 1982-03-02 | 1983-09-06 | 松岡 信二 | Seal tape with markings for winding direction |
| CN85200472U (en) * | 1985-04-01 | 1985-12-20 | 刘公岛 | Wire with flat core and its cover |
| CN85200915U (en) * | 1985-04-01 | 1986-02-05 | 梁子材 | Multifunctional arithmetic toy |
| JPH07186356A (en) * | 1986-10-20 | 1995-07-25 | Raychem Sa:Nv | Production of thermally recoverable article |
| US5445848A (en) * | 1992-05-22 | 1995-08-29 | Snam S.P.A. | Tape for reinforcing pressure-supporting hollow bodies and a method for repairing deteriorated pipes |
| US5348801A (en) * | 1992-05-22 | 1994-09-20 | Snam S.P.A. | Tape for reinforcing pressure-supporting hollow bodies and a method for repairing deteriorated pipes |
| JPH06166140A (en) * | 1992-10-01 | 1994-06-14 | Sekisui Chem Co Ltd | Laminate and production thereof |
| CN1158582A (en) * | 1994-09-22 | 1997-09-03 | 斯南普罗吉蒂联合股票公司 | Method for restoring the functionality of equipment subjected to heavy corrosion in a plant for the prodn. of urea |
| CN1171986A (en) * | 1997-05-29 | 1998-02-04 | 王保东 | Method for manufacturing or repairing hydro-cylinder and pipeline using composite material |
| CN2339546Y (en) * | 1998-06-13 | 1999-09-22 | 中科(南宁)防化学腐蚀设计研究所 | Anti-corrosion anti-leakage heat-insulation oil-storage tank |
| CN2349210Y (en) * | 1998-11-20 | 1999-11-17 | 夏博平 | Butyl adhesive tape for sealing |
| CN1293157A (en) * | 1999-10-13 | 2001-05-02 | 任恒福 | Allochroic antiscale |
| JP2001175174A (en) * | 1999-12-17 | 2001-06-29 | Kyosei:Kk | Display tape with adhesive |
| JP2002097428A (en) * | 2000-09-25 | 2002-04-02 | Sekisui Chem Co Ltd | Water-stopping pressure-sensitive adhesive tape |
| CN2565886Y (en) * | 2002-08-29 | 2003-08-13 | 罗荣才 | Roof thermo-insulated water-proof covering plate |
| CN1530463A (en) * | 2003-03-13 | 2004-09-22 | 中国第一汽车集团公司 | Non-nitrite water base antirusting agent |
| CN1457973A (en) * | 2003-05-30 | 2003-11-26 | 北京东方慧辰碳纤维科技有限公司 | Fiber reinforced drawn and extruded pipe with woven structure and its preparing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1632363A (en) | 2005-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2006034653A1 (en) | Carbon fiber composite for repairing and reinforcing pipelines having defects and the method of application | |
| CN101694261B (en) | Internal repaired mouth construction process of internal coating pipeline | |
| CN1322265C (en) | Gas pipe-line composite reinforcement construction and construction method thereof | |
| CN2890572Y (en) | Composite reinforcement structure for gas pipe | |
| CN111442139A (en) | Plastic-coated pipe cabin penetrating piece and welding method | |
| CN211159246U (en) | Flue gas desulfurization device | |
| CN210568513U (en) | Maintenance anti-corrosion structure of metal chimney leakage area | |
| CN103850514A (en) | Structure and method for anti-corrosive treatment of pure titanium plates of chimney steel inner cylinder and steel structure flue | |
| CN216112558U (en) | Composite steel pipe with zinc plated outside and plastic coated inside | |
| CN210344658U (en) | Carbonization wear-resistant elbow | |
| CN210196787U (en) | Corrosion-resistant stainless steel accessory for chemical industry | |
| CN210266233U (en) | Aluminium-plastic composite pipe | |
| JP2002054766A (en) | Steel pipe covered with highly anticorrosion metal and manufacturing method therefor | |
| CN211502010U (en) | Flexible expansion joint for desulfurization flue system | |
| CN211423591U (en) | Durable composite galvanized steel pipe | |
| CN216896189U (en) | Composite layer steel pipe | |
| CN220581890U (en) | Plastic-coated anticorrosion nodular cast iron pipe containing carbon steel lining | |
| CN216078829U (en) | High-modulus PPR shock-absorbing pipe fitting | |
| CN220957197U (en) | Steel belt three-layer polyethylene wear-resistant corrugated pipe for buried drainage | |
| CN217272857U (en) | Anti-corrosion pipeline for petroleum and natural gas transportation | |
| JP2932458B2 (en) | How to repair equipment containers such as existing boilers at the installation site | |
| CN217736637U (en) | Nonmetal compensator | |
| SU625090A1 (en) | Tee fitting | |
| CN213745474U (en) | Metal corrugated compensator | |
| CN115449792B (en) | Metal fiber felt-based self-fluxing alloy and aluminized composite protective layer for heating surface of boiler pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081205 Address after: No. 889, Yang Yang Road, Shanghai, Baoshan District Patentee after: Baogang Development Co., Ltd. Address before: No. 360, Lane 2, Pu Pu Road, Shanghai, Baoshan District Patentee before: Shanghai Baosteel Comprehensive Development Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: BAOGANG DEVELOPMENT CO., LTD. Free format text: FORMER OWNER: SHANGHAI BAOSHAN IRON + STEEL CO., LTD. Effective date: 20081205 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070620 Termination date: 20191221 |