CN201531685U - Seamless steel pipe - Google Patents
Seamless steel pipe Download PDFInfo
- Publication number
- CN201531685U CN201531685U CN2009200482282U CN200920048228U CN201531685U CN 201531685 U CN201531685 U CN 201531685U CN 2009200482282 U CN2009200482282 U CN 2009200482282U CN 200920048228 U CN200920048228 U CN 200920048228U CN 201531685 U CN201531685 U CN 201531685U
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- steel pipe
- seamless steel
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Abstract
The utility model provides a seamless steel pipe, which includes a body whose cross section is hollow, and an inner wall equipped inside the body and an outer wall arranged outside the body, and the utility model is characterized in that the inner wall of the seamless steel pipe is an acid cleaning layer, and the cross section is circular, and the seamless steel pipe includes two terminal ports, whose diameters are not identical; and the seamless steel pipe body uses SUS stainless steel material. Because the inner wall of the seamless steel pipe provided by the utility model is a acid cleaning layer, the pipe can be applied in processing equipment and delivery equipment in various water treatment apparatus.
Description
Technical field
The utility model relates to a kind of seamless steel pipe, relates in particular to a kind of seamless steel pipe that is applicable to various water treatment apparatus.
Background technique
Along with the raising of Consumer to safety and hygienic requirements, water system and go out in the treatment device the increasing carrier that adopts stainless-steel seamless pipe as the storage and the circulation of water, and water is to be directly connected to common people's the living safety and the important daily product of health, so very strict for the requirement of water pipe.
Original stainless steel material, by processing and perforation to pole, form final steel pipe, by assembling with steel pipe and other machinery and electronic component, manufacture the processing and the haulage device of food processing plant, edible oil or milk, and the packaging facilities of beverage and other liquid food and production, haulage device.
If the steel pipe inwall is smooth inadequately, then cause liquid residual and overstocked in steel duct easily, thereby produce bacterium etc., cause water or water treatment apparatus are produced harmful effect, also be unfavorable for the cleaning and the maintenance of water treatment apparatus.
In addition, because glassware for drinking water has subacidity, accumulating over a long period to have acidization to water pipe, and therefore acid resistance and the corrosion resistance to the book pipe has certain requirement.
The model utility content
At above-mentioned factor, the purpose of this utility model is to provide a kind of seamless steel pipe, is suitable in the water-treating equipment and water system of high request.
The technical solution of the utility model is a kind of seamless steel pipe, comprise that the cross section is the body of hollow, be arranged at intrinsic inwall and be arranged at this external outer wall, it is characterized in that, described seamless steel pipe internal wall is the pickling layer, and described seamless steel pipe outer wall is the pickling layer, and described cross section is circular, described seamless steel pipe comprises two ports, and the diameter of two ports is inconsistent.
In preferred embodiment of the utility model, described seamless steel pipe body is the SUS444 stainless steel material.
In preferred embodiment of the utility model, irregular particle on the described seamless steel pipe internal surface pickling layer.。
In preferred embodiment of the utility model, the length of described seamless steel pipe can be adjusted as required.
The utility model has the advantages that: because the seamless steel pipe internal surface has adopted pickling processes, and characteristic in conjunction with the SUS444 steel, the seamless steel pipe that makes the utility model disclose can be used on the process equipment and haulage device of various water treatment apparatus etc., and the seamless steel pipe of the utility model announcement, the diameter of two ports is inconsistent, thereby makes things convenient for the socket between the seamless steel pipe.
Description of drawings
Accompanying drawing 1 is the utility model embodiment's a steel pipe schematic representation;
Accompanying drawing 2 is the schematic representation of two ports in the utility model;
1 is the pickling layer among the figure, and 2 is body, and 3 are the pickling layer, and 4 is port a, and 5 is port b.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail, thereby protection domain of the present utility model is made more explicit defining so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that.
As illustrated in fig. 1 and 2, in the utility model, the cross section of steel pipe is circular, comprises body 2, is provided with pickling layer 1 at the outer wall of body 2, is provided with pickling layer 3 at the inwall of body 2.The port a4 of seamless steel pipe and the diameter of port b5 are inconsistent, and can be arranged to can socket between two ports.
The pickling layer is by seamless steel pipe is carried out forming after the pickling processes, under the effect of pickling solution, and the smoother that the pickling layer on seamless steel pipe surface becomes, and be formed with fine and close film, and decay resistance is improved.
Polishing is electropolishing to be carried out on the surface of seamless steel pipe form, and after polishing, the degree of finish on seamless steel pipe surface is than higher.
Because the diameter of two ports of seamless steel pipe is inconsistent, cause several seamless steel pipes when connecting, can directly carry out socket by big portlet, convenient and swift.Especially be applied in the less demanding occasion of sealability, perhaps between two pipes, carry out encapsulation process again.
Steel pipe is by the schematic structure of pole through perforation processing and acid cleaning process formation, and the body employing label of steel pipe is that the stainless steel of SUS444 is raw material, and the stainless performance of SUS444 is as follows:
SUS444 (00Cr18Mo2) is a kind of ultra-low carbon nitrogen, contain 18% chromium and 2% molybdenum, high anti-corrosion Ferritic Stainless Steel.This steel grade generally adopts niobium or titanium to carry out stabilization, the intergranular corrosion after can avoiding welding.Compare with SUS316L with Austenitic Stainless Steel such as SUS304, the sharpest edges of this steel grade are to have excellent anti-chlorine ion stress corrosion cracking ability, and the anti-chlorine ion pitting corrosion ability of this steel grade is better than SUS304, and are suitable with SUS316L.Therefore, this steel grade is particularly suitable for being applied to various water treatment apparatus.
The chemical composition of SUS444 is as follows: (unit: wt%)
| Standard | The trade mark | C ％ | N ％ | Cr ％ | Mn ％ | Mo ％ | Other |
| JIS G3459 | SUS444 | 0.025 | 0.025 | 17.00- 20.00 | 1.00 | 1.75- 2.50 | Nb or Ti or Zr:8* (C%+N%)-0.80 |
SUS444 has added the molybdenum element that improves anti-pitting corrosion ability;
SUS444 has added niobium or the titanium elements with static stabilization;
SUS444 has ultralow carbon nitrogen impurity element;
| The trade mark | Yield strength N/mm2 | Tensile strength N/mm2 | Specific elongation % | Vickers hardness | 180 ° of clod washes, d=2a |
| SUS444 typical case | 310 | 480 | 30 | 160 | Qualified |
| The SUS444 standard | ≥245 | ≥410 | ≥20 | ≤230 | Qualified |
[0028] The physical property of SUS444 is as follows:
| The trade mark | Density g/cm3 | Magnetic | Thermal conductivity, 100 ℃, W/m*K | Thermal expansion coefficient 0-100 ℃, mm/m*K |
| SUS444 | 7.75 | Have | 26.8 | 11.0*10-6 |
SUS444 density is low, can utilize area to increase
The SUS444 thermal conductivity is good, is easy to heat radiation
The SUS444 thermal expansion is few, and welding deformation is little
The corrosion resistance of SUS444:
Anti-chlorine ion stress corrosion cracking ability
Adopt test room's accelerate corrosion test method, test standard: GB/T 17898-1999 " stainless steel is the stress corrosion (cracking) test method in the fluidizing chlorination magnesium solution ".
The weld characteristics of SUS444:
| Recommend R | Avoid Q | |
| Welding method | TIG weldering, plasma welding, MIG weldering and laser beam welding (preferentially using pulse function) | Gas welding is as oxyacetylene |
| Welding consumables | The SUS444 mother metal is cut out bar or ER316L; The cleaning that keeps wlding | Non-ultralow-carbon wlding is as ER308 |
| Protection-gas welding | Ar or Ar+He mixed gas; Use back of the body protection gas | Nitrogen and hydrogen |
| The welding heat input | As far as possible little welding heat input is as low welding current, low weldingvoltage etc. | Weave bead; Too high weldingvoltage |
| Welded structure | Rationally arrange welding sequence, reduce welding and restrain | Excessive bevel for welding fit up gap |
| Other | Clear up bevel for welding with acetone before the weldering; The postwelding butt welded seam carries out acid wash passivation to be handled | Weld preheating; Postweld heat treatment |
In the utility model, after the steel pole processed, make the stainless-steel pipe of circular hollow, owing to adopt the mode of directly boring a hole, so steel pipe is seamless, and the diameter of two ports of steel pipe is inconsistent, thereby makes that the socket of different pipe ways is convenient.The internal surface of steel pipe makes that through pickling processes the degree of finish of internal surface is not high, and the surface has trickle concavo-convex particle to exist; And outer surface makes outer surface degree of finish very high through polishing treatment, and its developed surface is smooth plane.Steel pipe was formed with three-decker after advancing to handle at last, in conjunction with above-mentioned steel performance, so the steel pipe of the utility model announcement, be particularly suitable for being applied to various water treatment apparatus.
The above; it only is embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; any those of ordinary skill in the art are in the disclosed technical scope of the utility model; variation or the replacement that can expect without creative work all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claims were limited.
Claims (3)
1. seamless steel pipe, comprise that the cross section is the body of hollow, be arranged at intrinsic inwall and be arranged at this external outer wall, it is characterized in that, described seamless steel pipe internal wall is the pickling layer, and described seamless steel pipe outer wall is the pickling layer, and described cross section is circular, described seamless steel pipe comprises two ports, and the diameter of two ports is inconsistent.
2. seamless steel pipe according to claim 1 is characterized in that, described seamless steel pipe body is the SUS444 stainless steel material.
3. seamless steel pipe according to claim 2 is characterized in that, irregular particle on the described seamless steel pipe internal surface pickling layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200482282U CN201531685U (en) | 2009-09-17 | 2009-09-17 | Seamless steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200482282U CN201531685U (en) | 2009-09-17 | 2009-09-17 | Seamless steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201531685U true CN201531685U (en) | 2010-07-21 |
Family
ID=42527089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200482282U Expired - Fee Related CN201531685U (en) | 2009-09-17 | 2009-09-17 | Seamless steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201531685U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214421A (en) * | 2014-08-27 | 2014-12-17 | 无锡市华牧机械有限公司 | Construction process for stainless steel tube |
| CN108006974A (en) * | 2017-12-07 | 2018-05-08 | 巨浪(苏州)热水器有限公司 | A kind of water heater liner |
-
2009
- 2009-09-17 CN CN2009200482282U patent/CN201531685U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214421A (en) * | 2014-08-27 | 2014-12-17 | 无锡市华牧机械有限公司 | Construction process for stainless steel tube |
| CN108006974A (en) * | 2017-12-07 | 2018-05-08 | 巨浪(苏州)热水器有限公司 | A kind of water heater liner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100721 Termination date: 20140917 |
|
| EXPY | Termination of patent right or utility model |