CN107268005B - Non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method - Google Patents
Non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method Download PDFInfo
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- CN107268005B CN107268005B CN201610212131.5A CN201610212131A CN107268005B CN 107268005 B CN107268005 B CN 107268005B CN 201610212131 A CN201610212131 A CN 201610212131A CN 107268005 B CN107268005 B CN 107268005B
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- pickling
- immersible pump
- pipeline
- bucket
- lubrication pipe
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/68—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous solutions with pH between 6 and 8
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
- C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
- C23G1/061—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors nitrogen-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
A kind of non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method, it is characterised in that the following steps are included: a, setting dry oil lubrication pipe flushing system, b, acid wash passivation include following rinsing step: (1) trying water, (2) degreasing, (3) pickling, (4) passivation, (5) drying.Non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method of the invention, which has, is assembled into pickling circuit using existing pipeline, online pickling is carried out with hand-held diving pump, save lease pickler expense, remove pipeline secondary installing duration and expense from, reach convenience, pickling double effects, pickle liquor handles the advantages of facilitating and substantially reducing Pickling Engineering cost.
Description
Technical field
The present invention relates to a kind of pipe pickling methods, specifically, being a kind of non-orientation silicon steel furnace roller centralized grease lubrication
Pipe pickling method.
Background technique
Non-orientation silicon steel dry oil lubrication pipeline is concentrated mainly on annealing furnace area, provides lubrication drier oil for furnace roller bearing, therefore,
It has the characteristics that main line is long, non-orientation silicon steel dry oil lubrication pipeline, is distributed in stove two sides, and drier oil branch pipe and distributor connect
It connects, then is drawn by distributor, is connect with copper pipe with furnace roller bearing.
Conventional pipelines acid washing method: being to be shorted to carry out at pickling circuit, then with pickler on ground after removing pipeline
Pickling again gets on Pipe installing after qualified.Non-orientation silicon steel furnace roller drier oil is piped overall length 2200m, is distributed stove two sides, every side
One into pipeline twice.Its main line is Φ 34*5mm, and 20# seamless steel pipe, branch pipe is Φ 16*2.5 mm, 20# seamless steel
Pipe, carries out fuel feeding with 6 dry oil pumps respectively.Because internal diameter of the pipeline is smaller, main pipe line is again long, with dedicated online pickler pickling
Available power will be caused to lose, and cause to waste.
Therefore known non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method there is above-mentioned various inconvenient and
Problem.
Summary of the invention
The purpose of the present invention is to propose a kind of simple, practical non-orientation silicon steel furnace roller centralized grease lubrication pipeline acid
Washing method.
To achieve the above object, the technical solution of the invention is as follows:
A kind of non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method, it is characterised in that the following steps are included:
A, dry oil lubrication pipe flushing system is set, comprising the following steps:
(1) separate in drier oil pipeline supervisor in non-orientation silicon steel furnace area and several independent dry oil lubrication pipe flushing systems are set
System, and dry oil lubrication pipe flushing system is rinsed one by one；
(2) drier oil pipeline branch pipe is temporarily shorted in each independent dry oil lubrication pipe flushing system, establishes drier oil profit
Slip pipe road flush loop, dry oil lubrication pipe flushing circuit are equipped with a system return mouth；
(3) each independent dry oil lubrication pipe flushing system provides an immersible pump；
(4) three plastic barrels of each independent dry oil lubrication pipe flushing system offer: No. 1 bucket, No. 2 buckets and No. 3 buckets, three
Plastic barrel is placed next to each other in ground；
B, acid wash passivation
One immersible pump is provided, the interface seamless pipe of Φ 48*3.2mm is drawn into bucket face, interface band flange face will
System pipeline to pickling, which connects with pump and makees falsework, to be fixed, including following rinsing step:
(1) water is tried, first plus 1.5m3 clear water is to No. 2 buckets, starts immersible pump, clear water is thrown into system pipeline and recycled, examine
It looks into whether system pipeline is revealed, and pays attention to inner bucket water position, if water level is too low, add water, immersible pump is kept to be immersed in clear water；
(2) industrial soda sodium hydroxide (NaOH) is poured into No. 2 buckets and is stirred, draws heat using workshop hot water pipeline by degreasing
Water prepares No. 2 bucket aqueous slkalis to concentration 9%-10%, then temperature >=40 °C start immersible pump and beat circulation, continue 3- into No. 2 buckets
4h stops dry oil pump, is ejected lye in system pipeline with compressed air, and remove part system pipe flushing circuit flange, inspection
System pipeline inner wall is looked into whether there are also greasy dirt, if any continuing to rinse；Such as nothing, degreasing terminates；
(3) immersible pump is changed to No. 1 bucket, i.e. acid wash drum from No. 2 buckets by pickling, and pickling formula of liquid is hydrogen chloride in acid wash drum
It (HCl) is 8%~10%, corrosion inhibiter 1%, remaining is water, and system pipeline is connect with immersible pump, starts immersible pump, to system pipes
Road carries out pickling, after continuing pickling 1h, stops immersible pump, is ejected acid solution in system pipeline with compressed air, removes system pipeline
Part flange port checks system pipeline inner wall, rustless with system pipeline inner wall, and exposing metallic luster is qualification, otherwise continues acid
It washes；After pickling is qualified, add ammonium hydroxide in No. 1 bucket, circulation is beaten in side ammonification waterside in system pipeline, and detects circulation ammonia with PH test paper
The pH value of aqueous solution stops plus ammonium hydroxide when PH reaches 7, stops immersible pump after recycling 5min, with compressed air by system
Ammonia spirit ejects in pipeline；
(4) it is passivated, immersible pump is changed into No. 3 buckets from No. 1 bucket, is i.e. passivation bucket, being passivated preparation of passivation solution in bucket is nitrous acid
Sodium (NaNO2) 10%~14%, surplus is water；Starting immersible pump is passivated circulation, duration after connection system pipeline
40min-60min stops immersible pump after passivation cycle, is ejected passivation cycle passivating solution with compressed air, checks system pipes
Road junction is qualification with the dark gray protective film that system pipeline inner wall forms one layer of resistance to oxidation；
(5) it dries up, after pickling, passivation operation, is carried out continuing purge system pipeline with compressed air, guarantee system pipes
The bye-pass moisture drying of every, road is qualification.
Non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method of the invention can also be arranged using technology below
It applies to further realize.
Method above-mentioned, wherein the immersible pump is sewage submersible pump.
Method above-mentioned, wherein the immersible pump is hand-held diving pump.
Method above-mentioned, wherein the restrainer is four ammonium of hexa-methylene (CH2) 6N4.
Method above-mentioned, wherein No. 1 bucket, No. 2 buckets and No. 3 buckets are all volume 2-3m3 plastic barrels.
After adopting the above technical scheme, non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method of the invention has
Following advantages:
1, it is assembled into pickling circuit using existing pipeline, carries out online pickling with hand-held diving pump, saves lease pickling
Cost of equipment removes pipeline secondary installing duration and expense from, reaches convenient, pickling double effects；
2, pickle liquor processing is convenient, and waste liquid direct barreled can be transported to treating stations processing after pickling；
3, Pickling Engineering cost is substantially reduced.
Detailed description of the invention
Fig. 1 is that independent dry oil lubrication pipe flushing system signal is arranged in separation in the drier oil pipeline supervisor of the embodiment of the present invention
Figure；
Fig. 2 is the pickling circuit diagram of the dry oil lubrication pipe flushing system of the embodiment of the present invention.
In figure: 1-9 pipeline is temporarily shorted, 10 branch pipes, 11 general pipeline, 12 system return mouths, 13 immersible pumps, No. 141 buckets, and 152
Number bucket, No. 163 buckets.
Specific embodiment
With reference to embodiments and its attached drawing further explains the present invention.
Embodiment 1
Non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method of the invention, it is characterised in that including following step
It is rapid:
A, dry oil lubrication pipe flushing system is set, comprising the following steps:
(1) separate in drier oil pipeline supervisor in non-orientation silicon steel furnace area and several independent dry oil lubrication pipe flushing systems are set
System, and dry oil lubrication pipe flushing system is rinsed one by one；
Referring now to Fig. 1 and Fig. 2, Fig. 1 is that independent drier oil profit is arranged in separation in the drier oil pipeline supervisor of the embodiment of the present invention
Slip pipe road rinse-system schematic diagram, Fig. 2 are the pickling circuit diagram of the dry oil lubrication pipe flushing system of the embodiment of the present invention.
(2) drier oil pipeline branch pipe is temporarily shorted in each independent dry oil lubrication pipe flushing system, establishes drier oil profit
Slip pipe road flush loop, dry oil lubrication pipe flushing circuit are equipped with a system return mouth；
(3) each independent dry oil lubrication pipe flushing system provides an immersible pump；The immersible pump is sewage submersible pump.
(4) three plastic barrels of each independent dry oil lubrication pipe flushing system offer: No. 1 bucket, No. 2 buckets and No. 3 buckets, three
Plastic barrel is placed next to each other in ground；No. 1 bucket, No. 2 buckets and No. 3 buckets are all volume 3m3 plastic barrels.
B, acid wash passivation
One immersible pump is provided, the interface seamless pipe of Φ 48*3.2mm is drawn into bucket face, interface band flange face will
System pipeline to pickling, which connects with pump and makees falsework, to be fixed, including following rinsing step:
(1) water is tried, first plus 1.5m3 clear water is to No. 2 buckets, starts immersible pump, clear water is thrown into system pipeline and recycled, examine
It looks into whether system pipeline is revealed, and pays attention to inner bucket water position, if water level is too low, add water, immersible pump is kept to be immersed in clear water；
(2) industrial soda NaOH is poured into No. 2 buckets and is stirred by degreasing, draws hot water into No. 2 buckets using workshop hot water pipeline,
No. 2 bucket aqueous slkalis are prepared to concentration 9%, 40 °C of temperature, then starts immersible pump and beats circulation, continue 4h, stop dry oil pump, with compression
Air ejects lye in system pipeline, and removes part system pipe flushing circuit flange, whether checks system pipeline inner wall
There are also greasy dirt, if any continuing to rinse；Such as nothing, degreasing terminates；
(3) immersible pump is changed to No. 1 bucket, i.e. acid wash drum from No. 2 buckets by pickling, and pickling formula of liquid is that HCl is in acid wash drum
10%, corrosion inhibiter 1%, remaining is water, and system pipeline is connect with immersible pump, starts immersible pump, carries out pickling to system pipeline,
After continuing pickling 1h, stop immersible pump, ejected acid solution in system pipeline with compressed air, removes system pipeline part flange port,
Check system pipeline inner wall, rustless with system pipeline inner wall, exposing metallic luster is qualification, otherwise continues pickling；Pickling is qualified
Afterwards, add ammonium hydroxide in No. 1 bucket, circulation is beaten in side ammonification waterside in system pipeline, and the acid of cyclic ammonia water solution is detected with PH test paper
Basicity stops plus ammonium hydroxide when PH reaches 7, stops immersible pump after recycling 5min, with compressed air by ammonium hydroxide in system pipeline
Solution ejection；The restrainer is four ammonium of hexa-methylene (CH2) 6N4.
(4) it is passivated, immersible pump is changed into No. 3 buckets from No. 1 bucket, is i.e. passivation bucket, be passivated preparation of passivation solution in bucket are as follows: nitrous acid
Sodium (NaNO2) 10%, surplus is water；Starting immersible pump is passivated circulation, duration 60min, passivation after connection system pipeline
Stop immersible pump after circulation terminates, ejected passivation cycle passivating solution with compressed air, system pipes road junction is checked, in system pipeline
The dark gray protective film that wall forms one layer of resistance to oxidation is qualification；
(5) it dries up, after pickling, passivation operation, is carried out continuing purge system pipeline with compressed air, guarantee system pipes
The bye-pass moisture drying of every, road is qualification.
Embodiment 2
In the present embodiment in addition to being hand-held diving pump substitution sewage submersible pump with immersible pump, remaining is the same as embodiment 1
The present invention has substantive distinguishing features and significant technological progress, and non-orientation silicon steel furnace roller of the invention concentrates drier oil profit
Slip pipe road acid washing method, since drier oil pipeline supervisor's caliber is smaller, pipeline is long, and it is small to carry out the big material of pickling with dedicated pickler
With, it causes to waste, and the present invention is used to carry out pickling, not only facilitated, but also pickling effect can be reached, and pickling cost substantially reduces,
Liquid waste processing is convenient, and waste liquid direct barreled can be transported to treating stations processing after pickling.
Above embodiments are used for illustrative purposes only, rather than limitation of the present invention, the technology people in relation to technical field
Member, without departing from the spirit and scope of the present invention, can also make various transformation or variation.Therefore, all equivalent
Technical solution also should belong to scope of the invention, should be limited by each claim.
Claims (3)
1. a kind of non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method, it is characterised in that the following steps are included:
A, dry oil lubrication pipe flushing system is set, comprising the following steps:
(1) separate in drier oil pipeline supervisor in non-orientation silicon steel furnace area and several independent dry oil lubrication pipe flushing systems be set,
And dry oil lubrication pipe flushing system is rinsed one by one；
(2) drier oil pipeline branch pipe is temporarily shorted in each independent dry oil lubrication pipe flushing system, establishes dry oil lubrication pipe
Road flush loop, dry oil lubrication pipe flushing circuit are equipped with a system return mouth；
(3) each independent dry oil lubrication pipe flushing system provides an immersible pump；
(4) each independent dry oil lubrication pipe flushing system provides three plastic barrels: No. 1 bucket, No. 2 buckets and No. 3 buckets, three plastics
Bucket is placed next to each other in ground, and No. 1 bucket, No. 2 buckets and No. 3 buckets are all volume 2-3m3 plastic barrels；
B, acid wash passivation
One immersible pump is provided, the interface seamless pipe of Φ 48*3.2mm is drawn into bucket face, interface band flange face will be to acid
The system pipeline washed connects with pump and makees falsework and fixes, including following rinsing step:
(1) water is tried, first plus 1.5m3 clear water is to No. 2 buckets, starts immersible pump, clear water is thrown into system pipeline and recycled, check system
Whether road under the overall leadership is revealed, and pays attention to inner bucket water position, if water level is too low, adds water, immersible pump is kept to be immersed in clear water；
(2) industrial soda sodium hydroxide is poured into No. 2 buckets and is stirred by degreasing, draws hot water into No. 2 buckets using workshop hot water pipeline,
No. 2 bucket aqueous slkalis are prepared to concentration 9%-10%, then temperature >=40 °C start immersible pump and beat circulation, continue 3-4h, stop diving under water
Pump, is ejected lye in system pipeline with compressed air, and remove part system pipe flushing circuit flange, checks system pipeline
Whether inner wall is there are also greasy dirt, if any continuing to rinse；Such as nothing, degreasing terminates；
(3) immersible pump is changed to No. 1 bucket, i.e. acid wash drum from No. 2 buckets by pickling, and it is 8% that pickling formula of liquid, which is hydrogen chloride, in acid wash drum
~10%, corrosion inhibiter 1%, remaining is water, and system pipeline is connect with immersible pump, starts immersible pump, carries out acid to system pipeline
It washes, after continuing pickling 1h, stops immersible pump, ejected acid solution in system pipeline with compressed air, remove system pipeline part flange
Mouthful, check system pipeline inner wall, rustless with system pipeline inner wall, exposing metallic luster is qualification, otherwise continues pickling；Pickling is closed
After lattice, ammonium hydroxide is added in No. 1 bucket, circulation is beaten in side ammonification waterside in system pipeline, and detects cyclic ammonia water solution with PH test paper
PH value, when PH reaches 7, stop plus ammonium hydroxide, recycle 5min after stop immersible pump, will be in system pipeline with compressed air
Ammonia spirit ejection, the restrainer are four ammonium of hexa-methylene；
(4) it is passivated, immersible pump is changed into No. 3 buckets from No. 1 bucket, is i.e. passivation bucket, be passivated preparation of passivation solution in bucket are as follows: sodium nitrite
10%~14%, surplus is water；Starting immersible pump is passivated circulation after connection system pipeline, and duration 40min-60min is blunt
Change stops immersible pump after circulation terminates, is ejected passivation cycle passivating solution with compressed air, system pipes road junction is checked, with system pipeline
The dark gray protective film that inner wall forms one layer of resistance to oxidation is qualification；
(5) it dries up, after pickling, passivation operation, is carried out continuing purge system pipeline with compressed air, guarantee that system pipeline is every
The drying of root bye-pass moisture is qualification.
2. non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method as described in claim 1, which is characterized in that described
Immersible pump is sewage submersible pump.
3. non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method as described in claim 1, which is characterized in that described
Immersible pump is hand-held diving pump.
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| CN201610212131.5A CN107268005B (en) | 2016-04-07 | 2016-04-07 | Non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method |
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| CN201610212131.5A CN107268005B (en) | 2016-04-07 | 2016-04-07 | Non-orientation silicon steel furnace roller centralized grease lubrication pipe pickling method |
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| CN107268005B true CN107268005B (en) | 2019-09-13 |
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| CN108360005A (en) * | 2018-04-04 | 2018-08-03 | 山西省工业设备安装集团有限公司 | A kind of online cycle pickling passivating method of carbon steel piping |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04289183A (en) * | 1991-03-19 | 1992-10-14 | Kawasaki Steel Corp | Steel pipe pickling device |
| CN102373477A (en) * | 2010-08-18 | 2012-03-14 | 中冶天工集团有限公司 | Online pickling process of hydraulic pipeline |
| CN104265997A (en) * | 2014-08-29 | 2015-01-07 | 中国二十冶集团有限公司 | Hydraulic pipeline pickling, flushing and pressure testing overall construction method |
| CN104668245A (en) * | 2013-11-27 | 2015-06-03 | 五冶集团上海有限公司 | Acid pickling blowing method of hydraulic pipeline |
-
2016
- 2016-04-07 CN CN201610212131.5A patent/CN107268005B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04289183A (en) * | 1991-03-19 | 1992-10-14 | Kawasaki Steel Corp | Steel pipe pickling device |
| CN102373477A (en) * | 2010-08-18 | 2012-03-14 | 中冶天工集团有限公司 | Online pickling process of hydraulic pipeline |
| CN104668245A (en) * | 2013-11-27 | 2015-06-03 | 五冶集团上海有限公司 | Acid pickling blowing method of hydraulic pipeline |
| CN104265997A (en) * | 2014-08-29 | 2015-01-07 | 中国二十冶集团有限公司 | Hydraulic pipeline pickling, flushing and pressure testing overall construction method |
Non-Patent Citations (1)
| Title |
|---|
| 液压***管路的酸洗方法;曹祥;《液压与气动》;20121231(第5期);全文 * |
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