CN1216247C - Corrosion-control method of carbon steel tube - Google Patents
Corrosion-control method of carbon steel tube Download PDFInfo
- Publication number
- CN1216247C CN1216247C CN 02149223 CN02149223A CN1216247C CN 1216247 C CN1216247 C CN 1216247C CN 02149223 CN02149223 CN 02149223 CN 02149223 A CN02149223 A CN 02149223A CN 1216247 C CN1216247 C CN 1216247C
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- carbon steel
- tube
- corrosion
- welding
- 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
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The present invention discloses a corrosion resistant method for a carbon steel pipeline, which relates to the corrosion problem of the inner wall of a pipeline in an oil field. Although various protection techniques exist at present, the combination properties of the various protection techniques are poor, and particularly, an inner liner is easy to fall off. The inner liner can be burned out when welding. An opening is difficult to repair on the spot, and welding corrosion is serious. The corrosion resistant method of the present invention comprises: an epoxy resin protection layer is melted at the inner wall of a pipe, and connection transition in the connection position of pipes is carried out by stainless steel. A welding position can be rendered by stainless steel, and a stainless steel short pipe can also be welded into the connection position. The protection technique has the characteristics of excellent corrosion resistance, excellent pressure resistance, excellent temperature resistance, obvious resistance reduction and energy consumption reduction, convenient installation and maintenance, low manufacturing cost and long service life.
Description
Technical field
The present invention relates to the corrosion-resistant field of pipeline, relate in particular to the anticorrosion of inner-walls of duct.
Background technique
For Corrosion of Pipeline, especially the corrosion of oil field pipe, outside the pipe and weld joint all can take place in the pipe, through big quantity research for many years, protection question to the pipe outer wall solves substantially, the solution but the protection question of inner-walls of duct and weld seam also is far from is because the difference of fed sheet of a media in the pipe is had higher requirement to managing interior the protection with weld seam.At present the steel that adopts is moulded in conjunction with pipeline because steel and very big as the thermal expansion coefficient difference of the plastics of liner, steel, mould easy disengagement, or plastics are by Metal Cutting, flange or welding mouth cracking, had a strong impact on working life, the anti-aging and anti-extraneous destructive characteristics of glass steel pipeline is poor, and oil resistant does not ooze, be difficult for repairing, can not be with and press maintenance, the execution conditions harshness, these protective measures can reduce rate of corrosion, but when also having the field welding construction liner is burnt out, and the liner patch technology does not pass a test, it is not up to standard to eliminate rust, and easily causes the holiday of coating or comes off, and has finally quickened weld corrosion, though invented intelligent repaired mouth robot, also can't check construction quality, both increase difficulty of construction, not guarantee interior benefit quality again, these several protecting method are seldom used in the oil field.In order to prevent to corrode the perforation harm that brings, the employing that has thick walled tube, though can slow down corrosion failure, the cost multiplication in 2,3 years only working life, fails fundamentally to stop corrosion.The application area of another kind of steel skeleton plastic clad pipe also has been subjected to certain limitation, is the narrow limitation of temperature on the one hand, is not anti-extraneous destruction on the other hand.In view of the foregoing, must work out the better protecting method of a kind of combination property uses for on-the-spot.
Summary of the invention
The purpose of this invention is to provide a kind of energy and be fit to the carbon steel piping protecting method that use in the oil field, this method will satisfy certain intensity, have ageing-resistant, oil resistant oozes, the heatproof degree changes, combination force is strong and the good characteristics of anti-weld seam corrosivity.
Carbon steel piping anti-corrosion method of the present invention is to connect transition in the joint of carbon steel tube with stainless steel, and pipeline is heated to 220-230 ℃, clinkering one deck epoxy resin thin layer on tube wall.
Connect a kind of mode of transition with stainless steel, be weld to be felt secure with stainless steel, promptly in the 150-200mm at pipe coupling place scope, eliminate rust, the thick stainless steel of surfacing one deck 75-1000 μ m is again to wall rust cleaning, heating pipe again, with epoxy powder clinkering one layer thickness on tube wall is the protective coating of 350-500 μ m, the machining groove uses the welding rod identical with the surfacing material to do the weld seam bottoming then, does conventional carbon steel piping welding at last at the groove place.
Connect the another kind of mode of transition with stainless steel, be to be solded into one section stainless steel short tube in the joint, promptly earlier to carbon steel tube and stainless steel short tube processing bevel for welding, the stainless steel short tube is solded in the interface of two carbon steel tubes with the two-phase welding rod again, then tube wall is eliminated rust, heating pipe is used epoxy powder thick protective coating of clinkering one deck 350-500 μ m on tube wall again.
The present invention has following advantage:
1, superior corrosion resistance energy
Because the carbon steel tube part is coated by epoxy resin layer entirely, prevented the corrosion of carbon steel tube wall, the joint is a stainless steel weld joint, perhaps also be welded with the stainless steel short tube, all conditions to the oilfield transportation system medium can both adapt to, the problem that does not have the liner repaired mouth, the whole piece pipeline has good barrier propterty.
2, good pressure-resistant performance
Because all weld seams that are exposed in the pipe are stainless steel weld joint, and are the same with Ordinary Steel withstand voltage, also can use under negative pressure state.
3, inner wall smooth can the drag reduction consumption reduction
The epoxy resin layer of inner wall smooth, absolute roughness are less than 0.01mm, and friction factor is minimum, long-term use can not change, surperficial non flouling behaviour, and stream decreases littler by 1/4～1/5 than common steel tube, thereby reduced conveying energy consumption, under the certain prerequisite of throughput rate, can dwindle caliber; Under the constant prerequisite of pressure, can reduce the power of pump; Also can prolong scraper-running frequency, reduce time of pigging.
4, heat resistance is good
Applicable temperature is-40～200 ℃, can adapt to all requirements to temperature of oil-gas gathering and transportation pipeline.
5, installation, maintenance is convenient
Construction is the same with the construction of carbon steel tube at the scene, needn't procuring equipment in addition, can be with press operation during repairing, also the not company of stopping production and shutoff.
6, the low life-span of cost is long
Cost only is 1.3-1.4 a times of common steel tube, is lower than the cost of glass fibre reinforced plastics and steelframe plastic composite pipe, and working life and this, two kinds of pipelines were identical, is 4-5 times of carbon steel tube.
7, applied range
Not only can be applicable to oil field gathering and transportation, notes, backwater are handled, and also can be used in chemical system and the municipal engineering.
Embodiment
The present invention can divide two sections to carry out when using on engineering, and leading portion carries out in factory earlier, and back segment carries out to the scene again.The stainless steel of doing the weld seam bottoming with stainless steel connects transition technology, elder generation is with the inner tube wall degreasing in factory, derusting by sandblasting in the 150-200mm of pipe coupling place scope, to pipe end inwall heating in medium frequency, again in the inhomogeneous surfacing stainless steel of heating place 75-1000 μ m, in-line wall derusting by sandblasting then, heating in medium frequency is to 220-230 ℃ again, be sprayed on inner tube wall with epoxy powder, make the thick epoxy protective coating of inner tube wall clinkering one deck 350-500 μ m, the mechanical groove opening in cooling back.At the scene groove is cleared up, under the argon arc protection, used the welding rod identical to carry out the weld seam bottoming, the last routine welding of carrying out carbon steel piping at the groove place with the surfacing material.Connect transition technology with the stainless steel that is solded into the stainless steel short tube; elder generation is to the inner tube wall degreasing in factory; to carbon steel tube and stainless steel short tube groove opening; under the argon arc protection; with the two-phase welding wire carbon steel tube and stainless steel short tube are welded together; with the preheating oven air with the pipe preheating; then to the pipe derusting by sandblasting; rust cleaning reaches the Sa2.5 level; surface roughness is 30-50 μ m; again the pipe heating in medium frequency is arrived 220-230 ℃, be sprayed on inner tube wall, make the thick epoxy protective coating of tube wall clinkering one deck 350-500 μ m with epoxy resin.At the scene above-mentioned pipe is welded into complete pipeline with the two-phase welding wire under the argon arc protection.
Claims (3)
1, carbon steel piping anti-corrosion method is characterized by in the joint of carbon steel tube and connects transition with stainless steel, and pipeline is heated to 220-230 ℃ of clinkering one deck epoxy resin thin layer on tube wall.
2, carbon steel piping anti-corrosion method according to claim 1, it is characterized by in the joint of carbon steel tube and connect transition with stainless steel, be weld to be felt secure with stainless steel, promptly eliminate rust at the pipe coupling place earlier, the surfacing stainless steel, thickness is 75-1000 μ m, then the inner tube wall face is eliminated rust, heating pipe, with epoxy powder clinkering one layer thickness on tube wall is the protective coating of 350-500 μ m, use mechanical bevelling again, use the stainless steel electrode identical to do the weld seam bottoming, carry out the routine welding of carbon steel piping at last with the surfacing material.
3, carbon steel piping anti-corrosion method according to claim 1, it is characterized by in the joint of carbon steel tube and connect transition with stainless steel, be to be solded into one section stainless steel short tube in the joint, promptly earlier to carbon steel tube and Stainless Steel Tube processing bevel for welding, the stainless steel short tube is solded in the interface of two carbon steel tubes with two-way welding rod, then to tube wall rust cleaning, heating pipe again is with the protective coating of epoxy powder clinkering one deck 350-500 μ m on tube wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02149223 CN1216247C (en) | 2002-11-06 | 2002-11-06 | Corrosion-control method of carbon steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02149223 CN1216247C (en) | 2002-11-06 | 2002-11-06 | Corrosion-control method of carbon steel tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1499122A CN1499122A (en) | 2004-05-26 |
| CN1216247C true CN1216247C (en) | 2005-08-24 |
Family
ID=34233557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02149223 Expired - Fee Related CN1216247C (en) | 2002-11-06 | 2002-11-06 | Corrosion-control method of carbon steel tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1216247C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504104B (en) * | 2008-10-16 | 2013-07-10 | 吴发东 | Mouth compensating method for pipeline corrosion protection layer and integrated mouth compensating machine |
| WO2016010782A1 (en) * | 2014-07-16 | 2016-01-21 | Chemetics Inc. | Method of welding ferritic stainless steel to carbon steel using a filler material made of duplex stainless stell; corresponding welded article |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255207B (en) * | 2017-08-10 | 2018-07-10 | 四川久远科技股份有限公司 | A kind of Pipeline joint anticorrosion winding band and construction method |
| CN109128561A (en) * | 2018-10-30 | 2019-01-04 | 广船国际有限公司 | A kind of installation method of steamer pipeline |
-
2002
- 2002-11-06 CN CN 02149223 patent/CN1216247C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504104B (en) * | 2008-10-16 | 2013-07-10 | 吴发东 | Mouth compensating method for pipeline corrosion protection layer and integrated mouth compensating machine |
| WO2016010782A1 (en) * | 2014-07-16 | 2016-01-21 | Chemetics Inc. | Method of welding ferritic stainless steel to carbon steel using a filler material made of duplex stainless stell; corresponding welded article |
| CN106536111A (en) * | 2014-07-16 | 2017-03-22 | 凯密迪公司 | Method of welding ferritic stainless steel to carbon steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1499122A (en) | 2004-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111113841A (en) | 3LPE winding system of steel pipe fitting | |
| CN101694261A (en) | Internal repaired mouth construction process of internal coating pipeline | |
| CN1216247C (en) | Corrosion-control method of carbon steel tube | |
| CN104896218A (en) | Bimetal composite pipe end connecting device | |
| CN208074296U (en) | A kind of flaring lining stainless steel anti-corrosion drag-reducing abrasion-resisting composite steel tube pipeline | |
| CN1247817C (en) | Method for protecting inner wall of anti-corrosion pipeline joint by using sacrificial anode | |
| CN204201307U (en) | The high temperature resistant integral embedded type composite pipe of a kind of anti-spot corrosion | |
| CN202349420U (en) | Corrosion-resisting pipeline joint formed by welding of steel pipes made of different materials | |
| CN201836559U (en) | Thread seal joint for connecting bimetal tube with external diameter being not less than 30mm | |
| CN211203163U (en) | Ceramic lining composite steel pipe with corrosion resistance | |
| CN213333096U (en) | Pipeline and pipeline system | |
| CN112082014A (en) | Corrosion-resistant connecting joint for oil-gas conveying non-metal pipeline and connecting method | |
| CN102141179B (en) | Electric hot-melt fastening type pipe fitting | |
| CN208041342U (en) | The stainless steel composite pipe road connected is made of stainless steel short tube | |
| CN212616847U (en) | Corrosion-resistant connecting joint for oil and gas conveying non-metallic pipeline | |
| CN201672200U (en) | External enhanced hot-melt fastening pipe fitting | |
| CN1737263A (en) | Snow melting panel | |
| CN212080384U (en) | Novel composite pipeline | |
| CN215763888U (en) | Pipeline connector | |
| CN219734496U (en) | Titanium alloy composite pipe | |
| CN111251634A (en) | Pipe externally wound continuous fiber prepreg tape reinforced inclined joint elbow and manufacturing method thereof | |
| CN2516795Y (en) | Steel-plastic composited pipe with cladding material | |
| CN208041343U (en) | It is a kind of to make the stainless steel composite pipe road connected of compound short tube | |
| CN2641428Y (en) | Plastic coated steel pipe and joint used for fire extinguishing | |
| CN216201630U (en) | High-temperature anti-corrosion lining plate for ceramic pipeline |
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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |