WO2002090817A1 - Process for pipe internal anticorrosive and anti-erosive protection by means of squirted plastics and products resulting from this process - Google Patents
Process for pipe internal anticorrosive and anti-erosive protection by means of squirted plastics and products resulting from this process Download PDFInfo
- Publication number
- WO2002090817A1 WO2002090817A1 PCT/RO2001/000019 RO0100019W WO02090817A1 WO 2002090817 A1 WO2002090817 A1 WO 2002090817A1 RO 0100019 W RO0100019 W RO 0100019W WO 02090817 A1 WO02090817 A1 WO 02090817A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- squirted
- steel
- plastics
- pipes
- erosive
- Prior art date
Links
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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe
- F16L58/1036—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe the coating being a preformed pipe
-
- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1657—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section lengths of rigid pipe being inserted
Definitions
- Tightened joining between two modulated curve segments or one modulated curve segment and one straight pipe section can be achieved by welding at pipe steel tube level and by using a self-sealing set at plastic tube level, in the case of non-uniform internal diameter pipes or by welding or sticking plastics in the case of uniform internal diameter pipesv
- - Picture 2 Steel tube protected on the inside by squirted plastics, used to make non-uniform internal diameter pipes
- - Picture 3 Steel tube protected on the inside by squirted plastics, used to make uniform internal diameter pipes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The invention refers to a process for the internal anticorrosive and anti-erosive protection of tubular steel material by using squired plastics and the resulting material can be used in the oil industry, for instance. This process, according to the invention, consists of isolating on the inside a piece of tubular steel material by squirted plastic tube that is centered and maintained at a certain distance from an internal wall of the tubular steel material, so that it creates an annular space obstructed at both ends, at one end, it is provided with a communicating window between the annular space and the exterior, so that the air can be evacuated from the annular space while at the other end a mineral binder is being injected through a hole made in the tubular steel material. The product, according to the invention is obtained by applying this process, that includes a steel tube (3), provided with a lateral opening (4) at one end, inside which an equally long tube (2) made of squirted plastics is introduced, two fixing buttons (1) are attached on the exterior surface of the tube (2) and they come in contact with the steel tube (3) internal wall, so that an annular space is created between the two tubes (3 and 2), at both ends, out of which one sealing system (7) has a circumference discontinuance allowing communication between the annular space and the exterior, between two successive steel tubes (3), provided with the squirted plastic tubes (2) either a self-sealing set (8) or a mounting nipple (11) can be attached.
Description
PROCESS FOR PIPE INTERNAL ANTICORROSIVE AND
ANTI-EROSIVE PROTECTION BY MEANS OF SQUIRTED PLASTICS
AND PRODUCTS RESULTING FROM THIS PROCESS
It refers- to- a- rocess for internal anticorrosive and anti-erosive protection, of steel- pipes, steel curves and any tubular steel structures (manifold pumps, tanks, mark posts and s θfl-y by means of squirted plastics, an to he roduete resultin -Jfrem-this- process:
There is. aJ nαwiLprocess applied for the r_._.nn__itioτ__ng of old, worn out steel pipes (BJ 112783/1996), consisting of the sectioning of he worn out pipe into segments of a- certain length^ and attaching a-thread to-each of their ends-in order to-join-the steel tubes into a pipe. After having threaded and cleaned it on the inside, the steel tube is rotate while its interior i covered- w ir a synthetic resirr layer,- their a plastic tuber is~ mtrβduced-an while-pouring additional synthetic resin^ first mixed with-san sawdust or concrete. One end of the plastic tube thus introduced has the pipe's nominal diameter and at the^rther en there i^a plug- with: ^ smaller diameter serthat it fits-herr___etically-the- plasfi tube S-nominal diameter end, secured in the second-steel tube. _ The known process has the following disadvantages:
- it requires a difficult and^xpensive threadingoperation;
- it does not ensure an efficient fixing, of the plastic tube into the steel pipe,, which
- synthetic resins^- a- difficul t handle, toxic and extremely- ex _«nsive- chemical- product are needed for the relative attachment oFthe plastic tube into the steel pipe;
- great tolerances- as- to- the- geometrical- shape- and- the- sizes- stipulated- by- the— technical standards in force represent a major obstacle to the hermetic hydraulic fixin of the tubes.
The process, for pipe internal anti corrosive, and antberosive- protection, _accQrding_tQ ther invention, consists of introducing a laslic tube^intr_raτreiLheι new υr υld~steel Lube, after having first attaGhed-certainritems fixing buttons, by welding-or sticking themonto- the exterior surface of the plastic tube. These fixing buttons are made of the same material as the plastic tube- and once- introducedr inter the- steel tube the plastic- tuber hardens- there by injecting under- pressure a mineral binder- through- a- side- hole- of the- steel tube. Prior to this operation, the annular space between the plastic tube exterior surface- and the- steel tube-internal surface- had beerr totally obstructed- with a sealing system atone end and partially-obstructed at the, other end in-θxder_tθ- aUαw the air to-be_^ evacuated during the mineral binder injection. Once the hinder injected and hardened, the injeetiθft hole is welded-shut and the plastic tube endsrare adjusted and processed in- order to allow certain sealing items to be mounted at plastic tube level.
Pipe orientation changes can be achieved by using steel curves protected on the inside, made both of modulated segments of curve that have internal anticorrosive and anti-erosive protection by means of squirted plastics and of linear pipe sections.
Tightened joining between two straight pipe sections can be achieved by welding at steel tube level and by using a self-healing set at plastic tube level, in the case of non- uniform internal diameter pipes or a mounting nipple in the case of uniform internal diameter pipes.
Tightened joining between two modulated curve segments or one modulated curve segment and one straight pipe section can be achieved by welding at pipe steel tube level and by using a self-sealing set at plastic tube level, in the case of non-uniform internal diameter pipes or by welding or sticking plastics in the case of uniform internal diameter pipesv
The process of internal anticorrosive and anti-erosive protection of steel pipes by means of squirted plastics, according to the invention, eliminates the disadvantages listed above, because:
- it also allows the steel tubes to be welded together when making pipes protected on the inside by squirted plastics;
- it replaces toxic, difficult to handle and expensive synthetic resins with a non- toxic, easy to handle and very economic mineral binder;
- it ensures a perfect fixing of the squirted plastic tube within the steel tube because the plastic tubes are equipped with fixing buttons and the mineral binder is injected under pressure into the annular space between the steel and the plastic tubes;
- it replaces the sealing plugs of the plastic tubes that are ineffective, difficult to make for the required geometrical shapes and sizes, with self-sealing sets or mounting nipples;
- it allows the creation of curves, forked tubes and other geometrical shapes made out of modulated segments or items;
- the process can be applied when making very flexible pipes, either threaded or non-threaded, by using both new steel tubes and old, worn out steel tubes no longer in use;
- the pipes obtained by applying this process have a longer operation life than the steel pipe operation life.
Here follows an example of the way the process for steel pipes anticorrosive and anti- erosive protection by means of squirted plastics can be applied, according to the invention, and also related to pictures 1 ÷ 9, representing:
- Picture 1: General layout of the assemblage for the plastic tube fixing into the steel tube;
- Picture 2: Steel tube protected on the inside by squirted plastics, used to make non-uniform internal diameter pipes;
- Picture 3: Steel tube protected on the inside by squirted plastics, used to make uniform internal diameter pipes;
- Picture 4: Modulated 15° segment, used to create curves of various sizes, protected on the inside by squirted plastics and used for non-uniform internal diameter pipes;
- Picture 5: Modulated 15° segment, used to create curves of various sizes, protected on the inside by squirted plastics and used for uniform internal diameter pipes;
- Picture 6: Self-sealing set, used to make non-uniform internal diameter pipes and curves;
- Picture 7: Mounting nipple, used to make uniform internal diameter pipes;
- Picture 8: General layout of a pipe with a curve protected on the inside by squirted plastics and with a non-uniform internal diameter;
- Picture 9: General layout of a pipe with a curve protected on the inside by squirted plastics and with a uniform internal diameter.
The process for the steel pipes internal anticorrosive and anti-erosive protection by means of squirted plastics, according to the invention, consists of the attachment of fixing buttons, 1, by welding or sticking them onto the exterior surface of a plastic tube, 2, that is introduced into a steel tube, 3, with a lateral opening, 4, at one of the ends of the steel tube, 3, through which a mineral binder, 5, is injected after having totally obstructed the annular space between the plastic tube, 2, and the steel tube, 3, with a sealing system, 6, at the one end, and a sealing system, 7, at the other end, is designed to allow the air to be evacuated through the upper side during the injection of the binder (picture 1).
After the injection of the binder is finished and the binder hardens, the injection hole is welded shut, and the plastic tube ends are adjusted and processed in order to allow the sealing items to be mounted (self-sealing set, 8, or mounting nipple, 11), (pictures 2 and
3).
Pipe orientation changes can be achieved by using steel curves that have internal anticorrosive and anti-erosive protection by means of squirted plastics, made by welding together, at the steel tube level, modulated segments of curve protected on the inside (pictures 4 and 5), sealed at the plastic pipe level by means of joining elements, if necessary, with the self-sealing set, 8, or binding or welding, 12, plastic tubes (pictures 8 and 9). The entire range of pipe orientation changes required can be achieved by varying the number of segments, as well as the values of their sectioning angles from the tube axis.
Tightened joining between two elements of the pipe that can be straight sections, modulated curve segments or a straight pipe section and a modulated curve segment is achieved at squirted plastic tube level, 2, by means of a sealing set, 8, (picture 6), for non-uniform diameter pipes and by welding, 9, at steel tube level, 3 (picture 8).
In case you want to make steel pipes protected on the inside by squirted plastics, but with uniform internal diameter throughout the pipe (pipes that can be scraped), hermetic joining is achieved at squirted plastics level, along the straight segment, by means of mounting nipples, 11, (picture 7) and welding, 9, at steel tube level, (picture 9). The hermetic joining between the modulated segments forming a uniform internal diameter curve (pipes that can be scraped) is achieved at squirted plastic tube level, 2, by binding or welding, 12, and at steel segment level, 3, by welding, 9, (picture 9).
In order for the structure of the self-sealing set, 8, and of the mounting nipple, 11, materials to remain unaltered by the temperature of the steel tube, 3, welding area they are covered with a foliated ring, 10, made of a thermo-tolerant material. There is a steel plate ring, 13, mounted over the plate ring, 10, so that it should result a steel support at the welding root, 9.
The steel pipes protected on the inside by means of squirted plastics against corrosion and erosion made according to the process described so far have the following characteristics:
- its operation life is longer than steel pipe operation life,
- it has high pressure resistance, thus allowing larger flows at the same diameter during exploitation,
- higher resistance in the case of accidental internal or external stresses,
- low capacity losses, due to the smooth internal surface,
- there cannot appear any mineral scales on the internal surface,
- the underground line does not require any special arrangements,
- the plastic tube is safely sealed due to the sealing items used, the self-sealing set or the mounting nipple.
Claims
1. Process for the internal anticorrosive and anti-erosive steel pipe protection by means of squirted plastics,, characterized by the attachment of a variable number of fixing buttons ( 1 ) by use of welding or sticking outside a squήled plastictubc (2), introduced into a steel tube (3), with a lateral opening (4) at one end of the steel tube (3), through which a mineral binder (5) is infected after having totally obstructed the annular space between the steel tube (3) and the plastic tube- (4) by the sealing system (6) at one end and having at the other end partially obstructed the annular space with the sealing system (7), made so as to allow the air to be evacuated through its upper side during the injection of the mineral binder (5), and after its injection, and hardening, botl ends of the plastic tube are adjusted if they are too long and are processed so as tσ allow^ the sealing items- to be mounted, the self-sealingset (8) or the mounting nipple (11).
2. Process for the internal anticorrosive and anti-erosive steel pipe protection by means of squirted plastics, according to requirement 1, characterized by the fact the hermetic joining at squirted plastic tube level is done by means of self-sealing sets (8), for pipes that do not require a constant value for the internal diameter (pipes that cannot be scraped) or by means of the mounting nipple (11), for pipes that require a constant value for the internal diameter throughout their length (pipes that can be scraped).
3-. Process, for the internal anticorrosive and anti-erosive steel pipe, protection by means of squirted plastics, according to requirement 1, characterized by the fact the pipe orientation changes can be achieved by using new steel curves with the same anticorrosive and anti-erosive protection^ made of modulated curve segments- that arc sealed- by means of either self-sealing- sets (8) or mounting nipples (11).
4. Process for the internaL anticorrosive and anti-erosive steel pipe protectiorL by means of squirted pla tics, according to requiiemenl 1, chai aclei ized bythe fact it can apply both to the production of new steel pipes made of new steel tubes and to the production of new steel pipes by reconditioning old, worn out steel pipes no longer in use.
. Products resulted from applying this process for the internal anticorrosive and anti-erosive steel pipe protection by means of squirted plastics, according to requirement 1, characterized by the fact they can be attached by welding or sticking a variable number of fixing buttons (1) on the outside of a plastic squirted plastic tube (2), that is introduced into a steel tube (3) and hardened by the injection of a mineral binder (5); after this mineral binder is injected and hardens, both ends of the plastic tube are adjusted if they are too long and are processed so as to allow the sealing items to be mounted, either the self-sealing set (8) or the mounting nipple (11).
, Products resulted from applying this- process for the internal anticorrosive and anti-erosive steel pipe protection by means of squirted plastics, required for the orientation changes of pipes, steel curves protected on thcinside against corrosiorr ancLerosion-by meansof squirted plastics, characterized by the fact they are made by welding joined (9) at steel pipe level (3) modulated segments of curves protected o the inside and sealed at plastic tube level (2) by means of joining elements, either using the self? sealin _set-(8.). or by welding-and-binding ( 2.) thc plastkrtube
Hermetic joining oftwo pipe items at plastic tube levels by using either the sel searing set (8) (for non^mriform internal diameterpipes that cannot be scraped) or the mounting nipple (11) (for uniform internal diameter pipes that can be scraped).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ROA200100510A RO121235B1 (en) | 2001-05-10 | 2001-05-10 | Process for the internal corrosion- and erosion-proof protection of pipes and pipes made by carrying on the process |
| ROA200100510 | 2001-05-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002090817A1 true WO2002090817A1 (en) | 2002-11-14 |
Family
ID=20129435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/RO2001/000019 WO2002090817A1 (en) | 2001-05-10 | 2001-10-04 | Process for pipe internal anticorrosive and anti-erosive protection by means of squirted plastics and products resulting from this process |
Country Status (2)
| Country | Link |
|---|---|
| RO (1) | RO121235B1 (en) |
| WO (1) | WO2002090817A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013086192A1 (en) * | 2011-12-06 | 2013-06-13 | Berry Metal Company | Method to repair compromised inlet outlet piping |
| CN103982748A (en) * | 2014-06-10 | 2014-08-13 | 武汉中地管通非开挖科技有限公司 | Improved repair method for stainless steel lining of pipeline |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0297385A1 (en) * | 1987-06-30 | 1989-01-04 | Chevron Research And Technology Company | Pipeline rehabilitation method utilizing articulated gasketed joint pipe |
| FR2656821A1 (en) * | 1990-01-10 | 1991-07-12 | Hurner Sarl | |
| EP0569185A1 (en) * | 1992-04-27 | 1993-11-10 | CHANNELINE SEWER SYSTEMS Ltd. | Improvements in the lining of sewers and the like |
| CH683205A5 (en) * | 1990-01-31 | 1994-01-31 | Franz Schuster Dipl Ing | Construction element for sealing walkable canals |
-
2001
- 2001-05-10 RO ROA200100510A patent/RO121235B1/en unknown
- 2001-10-04 WO PCT/RO2001/000019 patent/WO2002090817A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0297385A1 (en) * | 1987-06-30 | 1989-01-04 | Chevron Research And Technology Company | Pipeline rehabilitation method utilizing articulated gasketed joint pipe |
| FR2656821A1 (en) * | 1990-01-10 | 1991-07-12 | Hurner Sarl | |
| CH683205A5 (en) * | 1990-01-31 | 1994-01-31 | Franz Schuster Dipl Ing | Construction element for sealing walkable canals |
| EP0569185A1 (en) * | 1992-04-27 | 1993-11-10 | CHANNELINE SEWER SYSTEMS Ltd. | Improvements in the lining of sewers and the like |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013086192A1 (en) * | 2011-12-06 | 2013-06-13 | Berry Metal Company | Method to repair compromised inlet outlet piping |
| CN103998847A (en) * | 2011-12-06 | 2014-08-20 | 贝里金属公司 | Method to repair compromised inlet outlet piping |
| CN103982748A (en) * | 2014-06-10 | 2014-08-13 | 武汉中地管通非开挖科技有限公司 | Improved repair method for stainless steel lining of pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| RO121235B1 (en) | 2007-01-30 |
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