CN104235528A - Molten sulfur transport pipeline - Google Patents
Molten sulfur transport pipeline Download PDFInfo
- Publication number
- CN104235528A CN104235528A CN201310240427.4A CN201310240427A CN104235528A CN 104235528 A CN104235528 A CN 104235528A CN 201310240427 A CN201310240427 A CN 201310240427A CN 104235528 A CN104235528 A CN 104235528A
- Authority
- CN
- China
- Prior art keywords
- molten sulfur
- pipeline
- resin layer
- polypropylene resin
- outside
- 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
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
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a molten sulfur transport pipeline which comprises a lining made of glass fiber reinforced plastics. A polypropylene resin layer sleeves the outside of the lining made of the glass fiber reinforced plastics, and an outer carbon steel pipe is arranged on the outside of the polypropylene resin layer. The molten sulfur transport pipeline has the advantages that the lining made of the glass fiber reinforced plastics is excellent in mechanical property and corrosion resistance and can bear friction force generated when molten sulfur flows and the corrosiveness of the molten sulfur, the polypropylene resin layer which sleeves the outside of the lining can effectively stop the molten sulfur from further corroding the pipeline even when the lining made of the glass fiber reinforced plastics peels off and is perforated, and the outer carbon steel pipe which is arranged on the outermost layer of the pipeline can realize effects of a support and further can effectively protect the pipeline against being damaged by external force; the molten sulfur transport pipeline is simple in structure and easy to manufacture and can be used for a long time, and enterprises cannot be shut down due to damage to the pipeline.
Description
Technical field
The present invention relates to gas washing in SA production field, refer to a kind of Molten sulphur conveying pipe especially.
Background technique
Molten sulphur has a small amount of H in handling and storage process
2s gas is run out of, and causes environmental pollution.H
2s gas has obvious corrosive action to iron:
(1) microstructure
Counter stress corrosion cracking receptance raises by following order:
Untempered martensitic structure after tissue → quenching after spheroidized carbide tissue in ferrite → complete Quench and temper tissue → normalizing and tempering tissue → normalizing.
(2) intensity and hardness
With the rising of yield strength, the ratio of critical stress and yield strength declines, and namely Sensitivity of Stress Corrosion increases.
The raising of material hardness, improves the receptance of sulphide stress corrosion.
(3) alloying element and heat treatment
Carbon (C): the receptance that can improve the stress-corrosion cracking of steel in sulphide.
Nickel (Ni): the resistivity that can reduce its counter stress corrosion cracking in sulfide hydrogen solution.
Chromium (Cr): it is generally acknowledged the steel used in sulfide hydrogen solution is feasible containing chromium 0.5% ~ 13%, because they can obtain stable tissue after heat treatment.
Manganese (Mn): manganese element is a kind of element of easy segregation, research manganese is very important in the effect of sulfide corrosion dehiscence process.When line of segragation Mn, C content are once reach certain proportion, producing at steel and in equipment welding process, producing the microstructure of martensite/bainite high-strength degree, low toughness, show very high hardness, to the anti-H of equipment
2s is disadvantageous.
(4) cold working
The cold deformation produced such as to bite through cold rolling, cold forging, clod wash or other manufacturing process and machinery, not only make the hardness in cold deformation district increase, but also the residual stress that generation one is very large, sometimes up to the yield strength of steel, thus can cause H
2s is responsive.Steel are along with the increase of cold working amount in general, and hardness increases, H
2the receptance of S strengthens.
Summary of the invention
For solving the problem, the invention provides a kind of Molten sulphur conveying pipe.
Concrete solution is: a kind of Molten sulphur conveying pipe, comprises frp lining, and the outer sheathed polypropylene resin layer of frp lining, polypropylene resin layer is outside equipped with carbon steel outer tube.
Further, described polypropylene resin layer is coated in outside frp lining, and carbon steel outer tube hot charging is outside polypropylene resin layer.
Frp lining has good mechanical characteristic and anti-corrosion capacity; the frictional force produced when can bear Molten sulphur flowing and its corrosivity; even if frp lining peels off and forms perforation; being set in its outer polypropylene resin layer also can stop Molten sulphur further to be corroded pipeline effectively; be arranged on outermost carbon steel outer tube except the effect playing support, outside destroy can also be subject to by available protecting pipeline.
Structure of the present invention is simple, is easy to make, and can use for a long time, and enterprise can not stop work because of Pipeline damage.
Accompanying drawing explanation
Fig. 1 is scheme of installation of the present invention.
1. frp lining 2. polypropylene resin layer 3. carbon steel outer tube
Embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated.
As shown in Figure 1, a kind of Molten sulphur conveying pipe, comprise frp lining 1, the outer sheathed polypropylene resin layer 2 of frp lining 1, polypropylene resin layer 2 is outside equipped with carbon steel outer tube 3, described polypropylene resin layer 2 is coated in outside frp lining 1, and carbon steel outer tube 3 hot charging is outside polypropylene resin layer 2.
Frp lining 1 has good mechanical characteristic and anti-corrosion capacity; the frictional force produced when can bear Molten sulphur flowing and its corrosivity; even if frp lining 1 peels off and forms perforation; being set in its outer polypropylene resin layer 2 also can stop Molten sulphur further to be corroded pipeline effectively; be arranged on outermost carbon steel outer tube 3 except the effect playing support, outside destroy can also be subject to by available protecting pipeline.
Structure of the present invention is simple, is easy to make, and can use for a long time, and enterprise can not stop work because of Pipeline damage.
Claims (2)
1. a Molten sulphur conveying pipe, is characterized in that: comprise frp lining, and the outer sheathed polypropylene resin layer of frp lining, polypropylene resin layer is outside equipped with carbon steel outer tube.
2. a kind of Molten sulphur conveying pipe according to claim 1, is characterized in that: described polypropylene resin layer is coated in outside frp lining, and carbon steel outer tube hot charging is outside polypropylene resin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310240427.4A CN104235528A (en) | 2013-06-18 | 2013-06-18 | Molten sulfur transport pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310240427.4A CN104235528A (en) | 2013-06-18 | 2013-06-18 | Molten sulfur transport pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104235528A true CN104235528A (en) | 2014-12-24 |
Family
ID=52224161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310240427.4A Pending CN104235528A (en) | 2013-06-18 | 2013-06-18 | Molten sulfur transport pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104235528A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481892A (en) * | 2015-09-02 | 2017-03-08 | 江苏宏泰橡胶助剂有限公司 | A kind of improved Molten sulphur conveying pipe |
| CN106481893A (en) * | 2015-09-02 | 2017-03-08 | 江苏宏泰橡胶助剂有限公司 | A kind of Molten sulphur conveying pipe |
-
2013
- 2013-06-18 CN CN201310240427.4A patent/CN104235528A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481892A (en) * | 2015-09-02 | 2017-03-08 | 江苏宏泰橡胶助剂有限公司 | A kind of improved Molten sulphur conveying pipe |
| CN106481893A (en) * | 2015-09-02 | 2017-03-08 | 江苏宏泰橡胶助剂有限公司 | A kind of Molten sulphur conveying pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141224 |