CN101585038A - Stainless steel pipe cleaning method - Google Patents
Stainless steel pipe cleaning method Download PDFInfo
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- CN101585038A CN101585038A CNA2009103038512A CN200910303851A CN101585038A CN 101585038 A CN101585038 A CN 101585038A CN A2009103038512 A CNA2009103038512 A CN A2009103038512A CN 200910303851 A CN200910303851 A CN 200910303851A CN 101585038 A CN101585038 A CN 101585038A
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Abstract
The invention discloses a kind of stainless steel pipe cleaning method, it is characterized in that may further comprise the steps: (1) carries out ungrease treatment to stainless steel pipes; (2) clean with the high pressure pure water; (3) use the acid solution cleaning treatment; (4) clean with the high pressure pure water; (5) use nitrogen drying; (6) pipe interior inspection, qualifiedly seal protection.The present invention can guarantee that stainless steel pipes obtains good profiled surface and corrosion resistance; can guarantee simultaneously that stainless steel pipes obtains good cleannes; can effectively remove the oxide layer of weld seam and heat affected area; remove pipeline inside and outside dust and disparate metals particle; obtain the surface of the work of clean dried; guarantee to obtain cleannes in favorable surface quality and the pipe, and be applicable to the stainless steel pipes of major diameter or minor diameter.
Description
Technical field
The present invention relates to stainless steel pipes moulding engineering field, especially a kind of is the surface treatment of welding back butt welded seam and heat affected area, to guarantee to obtain good profiled surface and corrosion resistance, guarantee to obtain the stainless steel pipe cleaning method of good cleannes simultaneously, for example power conduit system such as the gas pipeline of gas turbine, fire resistant oil pipeline.
Background technology
At present, the stainless steel pipes sub-assembly generally includes elements such as steel pipe, pipe fitting, flange, in pipeline shaping, assembling, welding process, can form the oxide layer of weld seam and heat affected area, some greases, dust and disparate metals particle also can be adhered in the surface simultaneously, these factors all can influence workpiece surface quality, reduce its corrosion resistance, entering foreign matter simultaneously in the pipe will directly influence the serviceability of pipeline (power conduit all needs higher cleannes, guarantees the degree of purity of its medium).Therefore, generally all to adopt corresponding cleaning technology other foreign matter, to guarantee the serviceability of product to remove oxide layer and to adhere to.
Cleaning method commonly used at present has infusion method (mixed solution of nitric acid+hydrofluoric acid), semar technique (pickling paste of certain proportion prescription).
The oxide of weld seam and heat affected area can be effectively removed in the immersion of the mixed solution of nitric acid+hydrofluoric acid, simultaneously there is passivation on the surface, can obtain favorable surface quality.But can not be with dust and disparate metals particle removal, the inner surface of pipeline cleannes can not get guaranteeing.The pickling paste semar technique is only applicable to the large-diameter pipeline surfaces externally and internally, just can't implement the small diameter pipeline inner surface.And above cleaning method all can not effectively be removed foreign object in pipe.
Summary of the invention
The purpose of this invention is to provide a kind of stainless steel tube that makes and have cleannes in favorable surface quality and the pipe, and can remove the stainless steel pipe cleaning method of the inside and outside foreign matter of pipe.
In order to achieve the above object, the present invention adopts following technical scheme: a kind of stainless steel pipe cleaning method may further comprise the steps: (1), stainless steel pipes is carried out ungrease treatment; (2), clean with the high pressure pure water; (3), use the acid solution cleaning treatment; (4), clean with the high pressure pure water; (5), use nitrogen drying; (6) pipe interior inspection, qualifiedly seal protection.
Described ungrease treatment is, it is that 60-80 ℃, mass percent are that 15% the NaOH aqueous solution soaked 0.5-1.5 hour that stainless steel pipes is put into temperature.
Described pickling processes is that the mixed aqueous solution of stainless steel pipes being put into nitric acid and hydrofluoric acid soaked 30-60 minute.
The nitric acid mass percent is that 18-22%, hydrofluoric acid mass percent are 2.1-2.8% in described nitric acid and the hydrofluoric acid mixed aqueous solution, and all the other are water.
High pressure pure water described in step (2) and the step (4) cleans to adopting 80-100kgf/cm
2The high pressure pure water stainless steel pipes is cleaned.
In the cleaning method of the present invention, high pressure pure water cleaning step, nitrogen drying step have been introduced simultaneously.The high pressure pure water clean the mesohigh pure water from the peristome of its stainless steel pipes to internal spray, cleaning, simultaneously also will be to its outer jet, cleaning, remove dust and disparate metals particle by water jet attached to the pipeline surfaces externally and internally, remove foreign object in pipe.Dry up managing inside and outside surface with pure compressed nitrogen in the nitrogen drying, guarantee to wash the inside and outside dry tack free of back pipe, cleaning, obtain good workpiece surface quality.
The invention has the beneficial effects as follows: the present invention can guarantee that stainless steel pipes obtains good profiled surface and corrosion resistance; can guarantee simultaneously that stainless steel pipes obtains good cleannes; can effectively remove the oxide layer of weld seam and heat affected area; remove pipeline inside and outside dust and disparate metals particle; obtain the surface of the work of clean dried; guarantee to obtain cleannes in favorable surface quality and the pipe, and be applicable to the stainless steel pipes of major diameter or minor diameter.
The specific embodiment
A kind of stainless steel pipe cleaning method may further comprise the steps: (1), stainless steel pipes is carried out ungrease treatment, remove grease; (2), clean, remove the inside and outside foreign matter of pipe,, can not increase new foreign matter, avoided the stress corrosion of chlorion simultaneously stainless steel material owing to adopt pure water to clean with the high pressure pure water; (3), use the acid solution cleaning treatment, remove the oxide of weld seam and heat affected area, simultaneously there is passivation on the surface; (4), clean, remove and be retained in the acid solution of pipe on inside and outside,, can not increase new foreign matter, avoided the stress corrosion of chlorion simultaneously stainless steel material owing to adopt pure water to clean with the high pressure pure water; (5), use the purified nitrogen air dry, avoided the secondary pollution of medium to workpiece; (6) pipe interior inspection, qualifiedly seal protection.
Described ungrease treatment is, it is that 60-80 ℃, mass percent are that 15% the NaOH aqueous solution soaked 0.5-1.5 hour that stainless steel pipes is put into temperature.
Described pickling processes is that the mixed aqueous solution of stainless steel pipes being put into nitric acid and hydrofluoric acid soaked 30-60 minute.
The nitric acid mass percent is that 18-22%, hydrofluoric acid mass percent are 2.1-2.8% in described nitric acid and the hydrofluoric acid mixed aqueous solution, and all the other are water.
High pressure pure water described in step (2) and the step (4) cleans to adopting 80-100kgf/cm
2The high pressure pure water stainless steel pipes is cleaned.
Embodiment 1:
With the gas pipeline is the example explanation:
Material A316L, specification Φ 26.7 * 2.9, the space multistory bend pipe.
1), ungrease treatment: it is 60 ℃ that workpiece (stainless steel pipes) is put into temperature, and mass percent is to soak 0.5h in 15% the NaOH solution.
2), the high pressure pure water cleans: with the stainless steel pipes pressure after the ungrease treatment is 80～100kgf/cm
2The high pressure pure water from the peristome of stainless steel pipes to internal spray, cleaning, operate in two ends and carry out repeatedly.With the inside of endoscopy workpiece, internal check is underproof to be repeated again after finishing.Simultaneously also will spray, clean the outside of stainless steel pipes, check the outside of workpiece after finishing with the visual detection method, visual examination is underproof to be repeated again.
3), pickling processes: the mixed aqueous solution of high pressure pure water cleaned stainless steel pipeline being put into nitric acid and hydrofluoric acid soaks 30min.In nitric acid and hydrofluoric acid mixed aqueous solution, HNO3 (nitric acid) mass percent is 18%, HF (hydrofluoric acid) mass percent is 2.1%, and other is a water.
4), the high pressure pure water cleans: with the stainless steel pipes pressure after the pickling processes is 80～100kgf/cm
2The high pressure pure water from its peristome to internal spray, cleaning, operate in two ends and carry out repeatedly, simultaneously also to spray, clean the outside of stainless steel pipes.Check the pH value of stainless steel pipes surface liquid with the PH test paper, pH value 6～8 is qualified, checks underproofly to repeat again.
5), nitrogen drying: dry up managing inside and outside surface with pure compressed nitrogen, guarantee to wash the inside and outside dry tack free of back pipe.
6), pipe interior inspection: check to managing inside rapidly after the drying that foreign matter is confirmed (use endoscope).
Seal protection after qualified: use stainless steel sleeve pipe, polyethylene pipe box or glued board line up to seal, and stick corresponding pipe arrangement mark.
Embodiment 2:
With the gas pipeline is the example explanation:
Material A316L, specification Φ 60.3 * 3.9, the space multistory bend pipe.
1), ungrease treatment: it is 80 ℃ that workpiece (stainless steel pipes) is put into temperature, and mass percent is to soak 1.5h in 15% the NaOH solution.
2), the high pressure pure water cleans: with the stainless steel pipes pressure after the ungrease treatment is 80～100kgf/cm
2The high pressure pure water from the peristome of stainless steel pipes to internal spray, cleaning, operate in two ends and carry out repeatedly.With the inside of endoscopy workpiece, internal check is underproof to be repeated again after finishing.Simultaneously also will spray, clean the outside of stainless steel pipes, check the outside of workpiece after finishing with the visual detection method, visual examination is underproof to be repeated again.
3), pickling processes: the mixed aqueous solution of high pressure pure water cleaned stainless steel pipeline being put into nitric acid and hydrofluoric acid soaks 60min.In nitric acid and hydrofluoric acid mixed aqueous solution, HNO3 (nitric acid) mass percent is 18%, HF (hydrofluoric acid) mass percent is 2.4%, and other is a water.
4), the high pressure pure water cleans: with the stainless steel pipes pressure after the pickling processes is 80～100kgf/cm
2The high pressure pure water from its peristome to internal spray, cleaning, operate in two ends and carry out repeatedly, simultaneously also to spray, clean the outside of stainless steel pipes.Check the pH value of stainless steel pipes surface liquid with the PH test paper, pH value 6～8 is qualified, checks underproofly to repeat again.
5), nitrogen drying: dry up managing inside and outside surface with pure compressed nitrogen, guarantee to wash the inside and outside dry tack free of back pipe.
6), pipe interior inspection: check to managing inside rapidly after the drying that foreign matter is confirmed (use endoscope).
Seal protection after qualified: use stainless steel sleeve pipe, polyethylene pipe box or glued board line up to seal, and stick corresponding pipe arrangement mark.
Embodiment 3:
With the fire resistant oil pipeline is the example explanation:
Material A304, specification Φ 33.4 * 4.5, the space multistory bend pipe.
1), ungrease treatment: it is 60 ℃ that workpiece (stainless steel pipes) is put into temperature, and mass percent is to soak 0.5h in 15% the KOH solution.
2), the high pressure pure water cleans: with the stainless steel pipes pressure after the ungrease treatment is 80～100kgf/cm
2The high pressure pure water from the peristome of stainless steel pipes to internal spray, cleaning, operate in two ends and carry out repeatedly.With the inside of endoscopy workpiece, internal check is underproof to be repeated again after finishing.Simultaneously also will spray, clean the outside of stainless steel pipes, check the outside of workpiece after finishing with the visual detection method, visual examination is underproof to be repeated again.In this step, also can spray stainless steel pipes with other pressure that is fit to.
3), acid solution is handled: the mixed aqueous solution of high pressure pure water cleaned stainless steel pipeline being put into nitric acid and hydrofluoric acid soaks 60min.In nitric acid and hydrofluoric acid mixed aqueous solution, HNO3 (nitric acid) mass percent is 20%, HF (hydrofluoric acid) mass percent is 2.4%, and other is a water.
4), the high pressure pure water cleans: with the stainless steel pipes pressure after the pickling processes is 80～100kgf/cm
2The high pressure pure water from its peristome to internal spray, cleaning, operate in two ends and carry out repeatedly, simultaneously also to spray, clean the outside of stainless steel pipes.With the pH value of PH test paper inspection stainless steel pipes surface liquid, pH value 6～8 is qualified, and internal check is underproof to be repeated again.In this step, also can spray stainless steel pipes with other pressure that is fit to.
5), nitrogen drying: dry up managing inside and outside surface with pure compressed nitrogen, guarantee to wash the inside and outside dry tack free of back pipe.
6), pipe interior inspection: check to managing inside rapidly after the drying that foreign matter is confirmed (use endoscope).
Seal protection after qualified: use stainless steel sleeve pipe, polyethylene pipe box or glued board line up to seal, and stick corresponding pipe arrangement mark.
Embodiment 4:
With the fire resistant oil pipeline is the example explanation:
Material A304, specification Φ 42.2 * 4.9, the space multistory bend pipe.
1), ungrease treatment: it is 70 ℃ that workpiece (stainless steel pipes) is put into temperature, and mass percent is to soak 1h in 15% the KOH solution.
2), the high pressure pure water cleans: with the stainless steel pipes pressure after the ungrease treatment is 80～100kgf/cm
2The high pressure pure water from the peristome of stainless steel pipes to internal spray, cleaning, operate in two ends and carry out repeatedly.With the inside of endoscopy workpiece, internal check is underproof to be repeated again after finishing.Simultaneously also will spray, clean the outside of stainless steel pipes, check the outside of workpiece after finishing with the visual detection method, visual examination is underproof to be repeated again.In this step, also can spray stainless steel pipes with other pressure that is fit to.
3), pickling processes: the mixed aqueous solution of high pressure pure water cleaned stainless steel pipeline being put into nitric acid and hydrofluoric acid soaks 60min.In nitric acid and hydrofluoric acid mixed aqueous solution, HNO3 (nitric acid) mass percent is 22%, HF (hydrofluoric acid) mass percent is 2.2%, and other is a water.
4), the high pressure pure water cleans: with the stainless steel pipes pressure after the pickling processes is 80～100kgf/cm
2The high pressure pure water from its peristome to internal spray, cleaning, operate in two ends and carry out repeatedly, simultaneously also to spray, clean the outside of stainless steel pipes.Check the pH value of the surface liquid of stainless steel pipes with the PH test paper, pH value 6～8 is qualified, and internal check is underproof to be repeated again.In this step, also can spray stainless steel pipes with other pressure that is fit to.
5), nitrogen drying: dry up managing inside and outside surface with pure compressed nitrogen, guarantee to wash the inside and outside dry tack free of back pipe.
6), pipe interior inspection: check to managing inside rapidly after the drying that foreign matter is confirmed (use endoscope).
Seal protection after qualified: use stainless steel sleeve pipe, polyethylene pipe box or glued board line up to seal, and stick corresponding pipe arrangement mark.
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
The present invention is not limited to the aforesaid specific embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (5)
1. stainless steel pipe cleaning method is characterized in that may further comprise the steps: (1), stainless steel pipes is carried out ungrease treatment; (2), clean with the high pressure pure water; (3), use the acid solution cleaning treatment; (4), clean with the high pressure pure water; (5), use nitrogen drying; (6) pipe interior inspection, qualifiedly seal protection.
2. stainless steel pipe cleaning method according to claim 1 is characterized in that: described ungrease treatment is, it is that 60-80 ℃, mass percent are that 15% the NaOH aqueous solution soaked 0.5-1.5 hour that stainless steel pipes is put into temperature.
3. stainless steel pipe cleaning method according to claim 1 is characterized in that: described pickling processes is that the mixed aqueous solution of stainless steel pipes being put into nitric acid and hydrofluoric acid soaked 30-60 minute.
4. stainless steel pipe cleaning method according to claim 3 is characterized in that: the nitric acid mass percent is that 18-22%, hydrofluoric acid mass percent are 2.1-2.8% in described nitric acid and the hydrofluoric acid mixed aqueous solution, and all the other are water.
5. stainless steel pipe cleaning method according to claim 1 is characterized in that: the high pressure pure water that high pressure pure water described in step (2) and the step (4) cleans to adopting 80-100kgf/cm2 cleans stainless steel pipes.
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| CNA2009103038512A CN101585038A (en) | 2009-06-30 | 2009-06-30 | Stainless steel pipe cleaning method |
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| CNA2009103038512A CN101585038A (en) | 2009-06-30 | 2009-06-30 | Stainless steel pipe cleaning method |
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Cited By (17)
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|---|---|---|---|---|
| CN101937728A (en) * | 2010-07-29 | 2011-01-05 | 上海瑞纽机械装备制造有限公司 | Method for processing tube support plate of steam generator of pressurized water reactor (PWR) nuclear power plant |
| CN102008856A (en) * | 2010-09-29 | 2011-04-13 | 南京梅山冶金发展有限公司 | Method for cleaning filter core of filter for lubricating system |
| CN102231357A (en) * | 2011-05-12 | 2011-11-02 | 陕西建工集团设备安装工程有限公司 | Construction method for controlling cleanliness of electronic-grade multicrystal-silicon process pipe |
| CN102274843A (en) * | 2011-05-30 | 2011-12-14 | 天津金牛电源材料有限责任公司 | Cleaning method for package barrel for electrolyte for lithium ion battery |
| CN102965675A (en) * | 2011-09-01 | 2013-03-13 | 沈阳远大铝业工程有限公司 | Pickling passivation method of stainless steel |
| WO2013097271A1 (en) * | 2011-12-25 | 2013-07-04 | 许继集团有限公司 | Hermetic evaporative cooling tower for direct-current electricity transmission, manufacturing method and rinsing method of same |
| CN103272805A (en) * | 2013-05-29 | 2013-09-04 | 国家电网公司 | Cleaning method of cooling water system in converter valve |
| CN104014565A (en) * | 2014-06-18 | 2014-09-03 | 东方电气集团东方电机有限公司 | Method for cleaning pipe of evaporative cooling system |
| CN104032322A (en) * | 2014-06-24 | 2014-09-10 | 浙江久立特材科技股份有限公司 | Degreasing cleaning process for steel tubes |
| CN104226649A (en) * | 2014-07-28 | 2014-12-24 | 宁国市大泉机械有限公司 | Method of cleaning inner wall of pipeline |
| CN106319501A (en) * | 2015-07-06 | 2017-01-11 | 苏州宇力管业有限公司 | Passivation technology for stainless steel flange |
| CN104722542B (en) * | 2013-12-24 | 2017-01-11 | 上海梅山钢铁股份有限公司 | Method for circularly flushing carbon steel pipes of refined cooling system |
| CN106835160A (en) * | 2016-12-29 | 2017-06-13 | 芜湖乐普汽车科技有限公司 | The cleaning method of stainless steel pipe |
| CN108941026A (en) * | 2018-05-10 | 2018-12-07 | 安徽北斗人防工程防护设备有限公司 | A kind of method that valve part degreasing is deoiled |
| CN109731859A (en) * | 2019-01-11 | 2019-05-10 | 湖州胜纯管道有限公司 | A kind of stainless steel pipe cleaning method |
| CN110938829A (en) * | 2019-11-21 | 2020-03-31 | 上海宝冶集团有限公司 | Method for cleaning interior of space curved surface refrigeration pipeline |
| CN112495953A (en) * | 2020-12-23 | 2021-03-16 | 华能山东石岛湾核电有限公司 | Method for cleaning main steam pipeline of high-temperature reactor |
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2009
- 2009-06-30 CN CNA2009103038512A patent/CN101585038A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101937728A (en) * | 2010-07-29 | 2011-01-05 | 上海瑞纽机械装备制造有限公司 | Method for processing tube support plate of steam generator of pressurized water reactor (PWR) nuclear power plant |
| CN101937728B (en) * | 2010-07-29 | 2013-01-23 | 上海瑞纽机械装备制造有限公司 | Method for processing tube support plate of steam generator of pressurized water reactor (PWR) nuclear power plant |
| CN102008856B (en) * | 2010-09-29 | 2014-07-30 | 南京梅山冶金发展有限公司 | Method for cleaning filter core of filter for lubricating system |
| CN102008856A (en) * | 2010-09-29 | 2011-04-13 | 南京梅山冶金发展有限公司 | Method for cleaning filter core of filter for lubricating system |
| CN102231357A (en) * | 2011-05-12 | 2011-11-02 | 陕西建工集团设备安装工程有限公司 | Construction method for controlling cleanliness of electronic-grade multicrystal-silicon process pipe |
| CN102231357B (en) * | 2011-05-12 | 2012-09-12 | 陕西建工集团设备安装工程有限公司 | Construction method for controlling cleanliness of electronic-grade multicrystal-silicon process pipe |
| CN102274843A (en) * | 2011-05-30 | 2011-12-14 | 天津金牛电源材料有限责任公司 | Cleaning method for package barrel for electrolyte for lithium ion battery |
| CN102965675A (en) * | 2011-09-01 | 2013-03-13 | 沈阳远大铝业工程有限公司 | Pickling passivation method of stainless steel |
| CN102965675B (en) * | 2011-09-01 | 2015-05-13 | 沈阳远大铝业工程有限公司 | Pickling passivation method of stainless steel |
| WO2013097271A1 (en) * | 2011-12-25 | 2013-07-04 | 许继集团有限公司 | Hermetic evaporative cooling tower for direct-current electricity transmission, manufacturing method and rinsing method of same |
| CN103272805A (en) * | 2013-05-29 | 2013-09-04 | 国家电网公司 | Cleaning method of cooling water system in converter valve |
| CN103272805B (en) * | 2013-05-29 | 2015-03-11 | 国家电网公司 | Cleaning method of cooling water system in converter valve |
| CN104722542B (en) * | 2013-12-24 | 2017-01-11 | 上海梅山钢铁股份有限公司 | Method for circularly flushing carbon steel pipes of refined cooling system |
| CN104014565A (en) * | 2014-06-18 | 2014-09-03 | 东方电气集团东方电机有限公司 | Method for cleaning pipe of evaporative cooling system |
| CN104014565B (en) * | 2014-06-18 | 2016-05-25 | 东方电气集团东方电机有限公司 | A kind of cleaning method of evaporative cooling system pipeline |
| CN104032322A (en) * | 2014-06-24 | 2014-09-10 | 浙江久立特材科技股份有限公司 | Degreasing cleaning process for steel tubes |
| CN104226649A (en) * | 2014-07-28 | 2014-12-24 | 宁国市大泉机械有限公司 | Method of cleaning inner wall of pipeline |
| CN106319501A (en) * | 2015-07-06 | 2017-01-11 | 苏州宇力管业有限公司 | Passivation technology for stainless steel flange |
| CN106835160A (en) * | 2016-12-29 | 2017-06-13 | 芜湖乐普汽车科技有限公司 | The cleaning method of stainless steel pipe |
| CN108941026A (en) * | 2018-05-10 | 2018-12-07 | 安徽北斗人防工程防护设备有限公司 | A kind of method that valve part degreasing is deoiled |
| CN109731859A (en) * | 2019-01-11 | 2019-05-10 | 湖州胜纯管道有限公司 | A kind of stainless steel pipe cleaning method |
| CN110938829A (en) * | 2019-11-21 | 2020-03-31 | 上海宝冶集团有限公司 | Method for cleaning interior of space curved surface refrigeration pipeline |
| CN112495953A (en) * | 2020-12-23 | 2021-03-16 | 华能山东石岛湾核电有限公司 | Method for cleaning main steam pipeline of high-temperature reactor |
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