CN101829705A - Process for producing rising pipe in heat exchanging reforming furnace - Google Patents
Process for producing rising pipe in heat exchanging reforming furnace Download PDFInfo
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- CN101829705A CN101829705A CN 201010190944 CN201010190944A CN101829705A CN 101829705 A CN101829705 A CN 101829705A CN 201010190944 CN201010190944 CN 201010190944 CN 201010190944 A CN201010190944 A CN 201010190944A CN 101829705 A CN101829705 A CN 101829705A
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- CN
- China
- Prior art keywords
- rising pipe
- tedge
- heat exchanging
- extruding
- reforming furnace
- 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.)
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Abstract
The invention relates to a process producing a rising pipe in a heat exchanging reforming furnace, comprising the following steps of smelting in an intermediate-frequency furnace, casting centrifugally, punching holes, extruding with cross rolls, extruding with a sizing machine, cooling with a cooling bed, accurately machining and obtaining the finished product. Compared with the complex process and equipment for rolling the rising pipe, the process and the equipment for centrifugally casting the rising pipe is simple and can save the cost and improve the benefit.
Description
Technical field:
The present invention relates to the manufacturing process of tedge in the heat-exchanged reformer, belong to the manufacturing field that smelts.
Background technology:
Tedge in the heat-exchanged reformer is used for one section reformed gas is outputed to the secondary reformer stove, and its working condition is high temperature, pressure-bearing, severe corrosive, so the requirement of material is relatively stricter.The Incoloy800H tubing of roll forming is used for tedge, is characterized in anticorrosive, high temperature creep-resisting and has certain high temperature intensity, is widely used in the industry.Yet pursuing and obtaining higher income with better quality is the basic of Business survival and development.The manufacture craft of rolled pipe and equipment complexity, and external import is adopted in the rolled pipe of Incoloy800H material, so it is costly, easily there is the even phenomenon of wall unevenness in the tubing of roll forming, inequality at high temperature, pressure-bearing, corrosive environment lower wall thickness can cause the stress distribution inequality, thereby has reduced the service life of tedge.The Incoloy800H material is heated to 500 ℃ sensitization phenomenon can occur between 750 ℃ the time, and the sensitization metal is subjected to the intercrystalline corrosion of some corrosive medium easily.
Summary of the invention:
Purpose of the present invention is exactly the manufacturing process that tedge in a kind of heat-exchanged reformer will be provided, and it can improve high temperature creep-resisting, stress corrosion resistant, anti-sensitization phenomenon and its service life of tedge to greatest extent.The object of the present invention is achieved like this, the manufacturing process of tedge in the heat-exchanged reformer, and it is by intermediate frequency furnace smelting → spun casting → punching → intersection roller extruding → sizing mill extruding → cold bed cooling → machine finishing → finished product.The present invention adopts spun cast pipe to have superior mechanical performance, and can reduce the manufacturing cost of tedge, changes rolling Incoloy800H tubing into the ZG10Ni32Cr20Nb spun cast pipe to improve mechanical performance and to reduce manufacturing cost
The specific embodiment:
The manufacturing process of tedge in the heat-exchanged reformer of the present invention, it is by intermediate frequency furnace smelting → spun casting → punching → intersection roller extruding → sizing mill extruding → cold bed cooling → machine finishing → finished product.During concrete enforcement, adopt the centrifugal casting tedge, because centrifugal casting is moulding in the mould tube of at a high speed rotation, be subjected to the doubly (severe of the severe/gravitational field of G=centrifugal force field of G during metal forming, the G of tedge generally gets about 120) gravity, in addition perpendicular to the continuously outwards radiating mode of mould wall, the directional solidification crystallization of metal, form fine and close columnar crystal structure, improved the mechanical performance of tedge.ZG10Ni32Cr20Nb compares Incoloy800H, and the crystal grain thinning element ti that metal interpolation element nb is wherein compared among the Incoloy800H more can embody its crystal grain thinning, the superiority of prevention intercrystalline corrosion.Spun cast pipe is used for tedge, and inside and outside hole, casting back is by machined, and the cast tube wall thickness that obtains is even, has reduced stress and has concentrated.Rolling mill practice is compared with centrifugal casting with equipment, rolling mill practice equipment complexity, and the centrifugal casting technique level is simple, saves cost, improves income.
Claims (1)
1. the manufacturing process of tedge in the heat-exchanged reformer, it is by intermediate frequency furnace smelting → spun casting → punching → intersection roller extruding → sizing mill extruding → cold bed cooling → machine finishing → finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010190944 CN101829705A (en) | 2010-05-25 | 2010-05-25 | Process for producing rising pipe in heat exchanging reforming furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010190944 CN101829705A (en) | 2010-05-25 | 2010-05-25 | Process for producing rising pipe in heat exchanging reforming furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101829705A true CN101829705A (en) | 2010-09-15 |
Family
ID=42714004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010190944 Pending CN101829705A (en) | 2010-05-25 | 2010-05-25 | Process for producing rising pipe in heat exchanging reforming furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101829705A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142420A (en) * | 1996-06-14 | 1997-02-12 | 张玉华 | Manufacture of alloy steel, special steel and high temperature alloy pipes |
| CN1211480A (en) * | 1998-07-10 | 1999-03-24 | 辽河石油勘探局石油化工总厂 | Centrifugal casting manufacturing technique for radiating exit collector pipe |
| US6250340B1 (en) * | 1998-08-20 | 2001-06-26 | Doncasters Plc | Alloy pipes and methods of making same |
| CN1414130A (en) * | 2002-09-27 | 2003-04-30 | 玛努尔(烟台)工业有限公司 | Fe-Cr-Ni cast alloy haring both creep deformation and toughness and its manufacturing method |
-
2010
- 2010-05-25 CN CN 201010190944 patent/CN101829705A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142420A (en) * | 1996-06-14 | 1997-02-12 | 张玉华 | Manufacture of alloy steel, special steel and high temperature alloy pipes |
| CN1211480A (en) * | 1998-07-10 | 1999-03-24 | 辽河石油勘探局石油化工总厂 | Centrifugal casting manufacturing technique for radiating exit collector pipe |
| US6250340B1 (en) * | 1998-08-20 | 2001-06-26 | Doncasters Plc | Alloy pipes and methods of making same |
| CN1414130A (en) * | 2002-09-27 | 2003-04-30 | 玛努尔(烟台)工业有限公司 | Fe-Cr-Ni cast alloy haring both creep deformation and toughness and its manufacturing method |
Non-Patent Citations (1)
| Title |
|---|
| 《炼油设计》 19961031 姚稷天 制氢转化炉出口集合管的代用材料 33-36 1 第26卷, 第5期 2 * |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100915 |