CN201285349Y - Verification apparatus for super-high safety valve - Google Patents
Verification apparatus for super-high safety valve Download PDFInfo
- Publication number
- CN201285349Y CN201285349Y CNU2008201596888U CN200820159688U CN201285349Y CN 201285349 Y CN201285349 Y CN 201285349Y CN U2008201596888 U CNU2008201596888 U CN U2008201596888U CN 200820159688 U CN200820159688 U CN 200820159688U CN 201285349 Y CN201285349 Y CN 201285349Y
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- Prior art keywords
- high pressure
- ultra
- safety valve
- super
- pressure safety
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Abstract
The utility model relates to a checker of a super-high pressure safety valve, which fixes a super-high pressure safety valve on a workbench by a U-shaped bolt, and an outlet flange of the super-high pressure safety valve is arranged upward. A super-high pressure tube and a super-high safety valve are connected by a high-pressure flange. After an air bottle is sequentially compressed by a compressor and a super-high pressure pump, an air source is filled in an energy accumulator. Pure water is injected from the outlet of the super-high pressure safety valve into a valve chamber, a video monitor is arranged, and the position of the video monitor is adjusted. An operation area and a check equipment area are separated by a safety protection wall according to the requirements of the safety law. After preparation, a pressurizing valve and a pressure discharge valve of a control table are used for controlling the pressure of the system of the check device. The core content of the utility model is the recline clamping mode of the super-high safety valve, and the air bubble observation method of the water injection video and the check safety protection measure of the outlet flange of the super-high pressure safety valve. The checker of a super-high pressure safety valve has simple structure, strong operability and sensitive and reliable check, is economical and practical, and fills the blanks of the checker of a super-high pressure safety valve in China.
Description
Technical field
The utility model relates to the calibration equipment of ultra-high pressure safety valve, specifically relate to the set-pressure scope at 100MPa～350MPa, the safety valve inlet diameter is at 10～100mm, and medium is the calibration equipment of the direct load formula of the spring ultra-high pressure safety valve on pressure vessel, pressure pipeline and the plant equipment of air, water vapour, water and other chemical substance.
Background technology
Safety valve is a kind of automatic valve, does not utilize the power of medium itself to discharge the fluid of a load quantity by any external force, to prevent the over proof safety value of pressure.After pressure recovered normally, valve row was again closed and is stoped medium to continue to flow out.Safety valve as the safety attachment of special equipment, is to guarantee petroleum chemical enterprise's pressure vessel and pressure pipeline safety, prevents the last resort of major accident.The periodic check of safety valve comprises that content is set-pressure and sealing load test.Safety valve setting pressure is meant the predetermined pressure that safety valve begins to open under service condition, under this pressure, the power that makes valve opening that is produced by pressure medium under the service condition of regulation is also referred to as opening pressure usually with making flap remain on the mutual balance of power on the valve seat.Sealing load is meant the import static pressure when carrying out leakage test, measures the slip by the closing member sealing surface under this pressure.
Safety valve just is divided into low pressure, middle pressure, high pressure and UHV (ultra-high voltage) four classes by its nominal pressure, when nominal pressure is called UHV (ultra-high voltage) during greater than 100MPa.At present, domestic have how tame large-scale petrochemical enterprise to use ultra-high pressure safety valve, as raise sub-petrochemical industry-BASF, Zhongnanhai shell, Maoming petrochemical industry, Qilu Petrochemical, Beijing Yanshan Petrochemical, Daqing petrochemical etc., all is external import.Regulation " Annual Test of Safty Valves; general every year at least once " according to TSG ZF001-2006 " safety valve safety and technical supervision rules " B6.3.1 bar, the 1st regulation of existing safety valve testing standard GB/T 12243-2005 " spring Direct loaded safety valve " " this standard is applicable to that set-pressure is 0.1MPa～42MPa; flow diameter is more than or equal to steam boiler, pressure vessel and the pipeline safety valve of 8mm " is to the not relevant so far calibration equipment of ultra-high pressure safety valve.How ensureing safe in utilization and checkout procedure safety, is each management organization, inspection body and applying unit institute questions of common interest, and the Research Significance of calibration equipment and method of calibration is great.
Problems such as present stage, the ultra-high pressure safety valve calibration equipment is production domesticization not, and there is complex structure in external device, costs an arm and a leg, practicality is not strong.Domestic each applying unit has only the standby safety valve of external UHV (ultra-high voltage) of buying more, after abroad checking before the parking maintenance, changes use during Awaiting Overhaul.Four major problem can appear in operation like this: the first, cost height needs buy to be equipped with valve more, and checks price very expensive abroad; The second, the safety valve assembling is accurate, and sealing surface requires high, and long-distance transport easily causes the safety valve performance change, influences safe in utilization and ordinary production; Three, it is long to deliver to external round of visits, in emergency circumstances can't satisfy the production needs; Four, be difficult to guarantee to check once at least every year.In a word, do not have the UHV (ultra-high voltage) calibration equipment to affect the ordinary production of enterprise, have bigger potential safety hazard, the research of carrying out the ultra-high pressure safety valve verifying attachment is very necessary.
Demand at the check of petrochemical enterprise in China ultra-high pressure safety valve, the urgent enterprise security that solves uses problem, reduce inspection cost, improve the operability and the practicality of device, the calibration equipment of ultra-high pressure safety valve mainly is that the structure of device is formed and connected mode, is convenient to the opening encapsulation performance evaluation of ultra-high pressure safety valve and ensures test safety.
Summary of the invention
1, goal of the invention
The purpose of this utility model provides a kind of ultra-high pressure safety valve calibration equipment, this device has simple in structure, and strong operability can ensure the safe operation of ultra-high pressure safety valve, save financial cost, make the special equipment use and management meet the regulation of existing state's laws rules.
2, technical scheme
A kind of calibration equipment of ultra-high pressure safety valve, it is characterized in that this device comprises ultra-high pressure safety valve 1, workbench 2, common U-bolt 3, super high pressure bend 4, UHV (ultra-high voltage) flange 5, video surveillance devices 7, security protection wall 8, source of the gas 9, gas cylinder 10, compressor 11, super-pressure pump 12, accumulator 13, back-up valve 15 on the control desk 14 and blowdown valve 16, wherein ultra-high pressure safety valve 1 is lying on the workbench 2, discharge flange up, with common U-bolt 3 ultra-high pressure safety valve 1 is fixed on the workbench 2, UHV (ultra-high voltage) flange 5 is connected with ultra-high pressure safety valve 1, one end of super high pressure bend 4 is connected with UHV (ultra-high voltage) flange 5, the other end passes security protection wall 8 and is connected with control desk 14, one side of accumulator 13 is connected with control desk 14 by super high pressure bend 4, opposite side is connected with super-pressure pump 12 by super high pressure bend 4, compressor 11 1 sides are connected with gas cylinder 10 by super high pressure bend 4, opposite side is connected with super-pressure pump 12 by super high pressure bend 4, check is housed with source of the gas 9 in the gas cylinder 10, a video surveillance devices 7 is installed above ultra-high pressure safety valve 1 discharge flange.
1) calibration equipment of above-mentioned ultra-high pressure safety valve, the import of ultra-high pressure safety valve 1 is connected with UHV (ultra-high voltage) flange 5 usefulness bolts, the centre adds the UHV (ultra-high voltage) pad, in the outside, junction around coating butter, guarantee the sealing.
2) calibration equipment of above-mentioned ultra-high pressure safety valve, between described super high pressure bend 4 and UHV (ultra-high voltage) flange 5, control desk 14, accumulator 13, super-pressure pump 12, compressor 11 and the gas cylinder 10 all with being threaded, and coating butter around in the outside, junction, guarantee sealing.
3) calibration equipment of above-mentioned ultra-high pressure safety valve, described video surveillance devices 7, be installed in directly over the discharge flange of ultra-high pressure safety valve 1, and with can clear view the valve pocket of ultra-high pressure safety valve 1 be as the criterion, the film viewing screen of video surveillance devices 7 is placed on control desk 14 next doors, and the position is as the criterion with convenient the observation.
4) calibration equipment of above-mentioned ultra-high pressure safety valve, described verification is provided by gas cylinder 10 with source of the gas 9, be stored in the accumulator 13 after compressed machine 11 and super-pressure pump 12 second-compressed, the system demand pressure height is controlled by back-up valve on the control desk 14 15 and blowdown valve 16.
5) calibration equipment of above-mentioned ultra-high pressure safety valve, described security protection wall 8 is to make with reinforced concrete, the high 2100mm of wall, thick 400mm.
The verification principle of the calibration equipment of this ultra-high pressure safety valve is that ultra-high pressure safety valve 1 is lying on the worktable, discharge flange up, source of the gas 9 is to be provided by gas cylinder 10, be stored in the accumulator 13 after compressed machine 11 and super-pressure pump 12 twice supercharging, control the pressure height of whole checking system again by back-up valve on the control desk 14 15 and blowdown valve 16.In the valve pocket of ultra-high pressure safety valve 1 discharge flange, fill with pure water 6, by observing bubble leakage rate in the pure water 6, estimate the set-pressure and the sealing property of ultra-high pressure safety valve 1 after the pressurize of boosting step by step with this.On the safety prevention measure, set up security protection wall 8, video surveillance devices 7 is placed in the top of ultra-high pressure safety valve 1 discharge flange, and the checked operation personnel observe ultra-high pressure safety valve outlet bubble leakage situation by the film viewing screen of the video surveillance devices on the control desk 14 7 outside security protection wall 8.
The above-mentioned calibration equipment of a kind of usefulness carries out the method for calibration of ultra-high pressure safety valve, and its method step is as follows:
A, with the import and export of ultra-high pressure safety valve to be verified 1 before connecting with clean-out system clean, decontamination;
B, macro check ultra-high pressure safety valve 1 check that whether its parts are intact, have flawless, corrosion and mechanical damage;
C, in valve pocket, inject pure water 6 from ultra-high pressure safety valve 1 discharge flange, after static 5-8 minute, the bubble of emptying valve pocket inside;
D, by security protection wall 8, formulate perfect security system, verification equipment region and manually-operated zone isolation are opened, operating personnel operate outside security protection wall 8, observe by the film viewing screen of video surveillance devices 7;
After e, the source of the gas 9 compressed machines 11 that provided by gas cylinder 10 once compress, fill source of the gas 9 pressure accumulations by super-pressure pump 12 by super high pressure bend 4 secondary pressurization in accumulator 13 again;
F, confirm in the security protection wall 8 unmanned after, prepare the beginning test operation;
G, open the back-up valve 15 on the control desk 14, make the source of the gas 9 of accumulator 13 enter ultra-high pressure safety valve 1 by super high pressure bend 4;
H, carry out the segmentation pressurize of boosting by opening and closing 15 pairs of ultra-high pressure safety valves of back-up valve 1;
I, open interpretational criteria according to the ultra-high pressure safety valve of setting, observing bubble by the film viewing screen of video surveillance devices 7 be appearance continuously, then closes back-up valve 15 and stops to boost, and determines the opening pressure of ultra-high pressure safety valve 1;
J, carry out experiments of sealing performance, observe the bubble slip by the film viewing screen of video surveillance devices 7 equally, judge the sealing property of ultra-high pressure safety valve 1 with this with 90% of the set-pressure of ultra-high pressure safety valve 1;
After k, verification finish, by the blowdown valve on the control desk 4 16 with the pressure of ultra-high pressure safety valve 1 steadily unload be depressed into zero-bit after, dismounting connects UHV (ultra-high voltage) flange 5, the pure water 6 in emptying ultra-high pressure safety valve 1 valve pocket;
1, the good ultra-high pressure safety valve 1 of verification is hung approval plate, lead sealing, provided calibration tails and verification report.
3, beneficial effect
This ultra-high pressure safety valve calibration equipment is simple in structure, economical and practical, both accumbency ultra-high pressure safety valve avoid the clamping force requirement, propose again to pour water and utilize video monitor to ensure verification safety at discharge flange.Workable, the verification of this cover calibration equipment is sensitive reliable, has solved the practical challenges of China's present stage ultra-high pressure safety valve check, and the blank of China's ultra-high pressure safety valve calibration equipment has been filled up in the safe operation of support equipment.
Utilize this calibration equipment, the ultra-high pressure safety valve of parameter such as table 1 has been carried out set-pressure and experiments of sealing performance.
Table 1 ultra-high pressure safety valve parameter
Ultra-high pressure safety valve after verification came into operation on equipment 1 year, and following feedback information shows can satisfy requirements of one's work, can ensure the sensitive reliability service of ultra-high pressure safety valve.
Description of drawings
Fig. 1: ultra-high pressure safety valve calibration equipment structural representation.
Reference numeral: 1-ultra-high pressure safety valve, 2-workbench, 3-U-bolt, 4-super high pressure bend, 5-UHV (ultra-high voltage) flange, 6-pure water, 7-video surveillance devices, 8-security protection wall, 9-source of the gas, 10-gas cylinder, 11-compressor, 12-super-pressure pump, 13-accumulator, 14-control desk, 15-back-up valve, 16-blowdown valve.
Embodiment
The calibration equipment of ultra-high pressure safety valve, its structure be connected as follows:
Ultra-high pressure safety valve 1 is lying on the workbench 2, discharge flange up, with common U-bolt 3 ultra-high pressure safety valve 1 is fixed on the workbench 2, UHV (ultra-high voltage) flange 5 is connected with ultra-high pressure safety valve 1 usefulness bolt, one end of super high pressure bend 4 is threaded with UHV (ultra-high voltage) flange 5 usefulness, the other end passes security protection wall 8 and is connected with control desk 14, back-up valve 15 and blowdown valve 16 are housed on the control desk 14, one side of accumulator 13 is connected with control desk 14 by super high pressure bend 4, opposite side is connected with super-pressure pump 12 by super high pressure bend 4, check is provided by gas cylinder 10 with source of the gas 9, compressor 11 1 sides are connected with gas cylinder 10 by super high pressure bend 4, opposite side is connected with super-pressure pump 12 by super high pressure bend 4, super high pressure bend 4 and gas cylinder 10, compressor 11, super-pressure pump 12, accumulator 13 and control desk 14 all are threaded, one video surveillance devices 7 is installed directly over ultra-high pressure safety valve 1 discharge flange, and the film viewing screen of video surveillance devices 7 is placed on the next door of control desk 14.
The calibration equipment of ultra-high pressure safety valve is:
1, ultra-high pressure safety valve 1 is lying on the workbench 2, discharge flange up, fix ultra-high pressure safety valve 1 by common U-bolt 3, the suction flange of ultra-high pressure safety valve 1 to be verified is connected with UHV (ultra-high voltage) flange 5 usefulness bolts, the centre adds the UHV (ultra-high voltage) pad, coating butter around the outside, junction, guarantee sealing, ultra-high pressure safety valve 1 inlet size Φ 24mm, set-pressure 160MPa, actuating medium C2H4, working pressure 110MPa, 106 ℃ of working temperatures, workbench 2 materials are stainless steel 304, the length and width height is 2000 * 850 * 850mm, U-bolt 3 latus rectums are 200mm, M12, material is a stainless steel 304, UHV (ultra-high voltage) flange 5 materials are 316SS, interior external diameter Φ 6.4mm and Φ 165mm, thickness 40mm, middle UHV (ultra-high voltage) gasket material is 316SS, interior external diameter Φ 1.6mm and Φ 24mm, thickness are 5mm.
2, super high pressure bend 4 is threaded with UHV (ultra-high voltage) flange 5 usefulness, for verify firm in the outside, junction around coating butter, guarantee good seal, super high pressure bend 4 materials are that 316SS, interior external diameter are respectively Φ 1.6mm and Φ 6.4mm;
3, a video surveillance devices 7 is installed in ultra-high pressure safety valve 1 discharge flange top, be installed in directly over the discharge flange of ultra-high pressure safety valve 1, adjusting video surveillance devices 7 positions is as the criterion can observe the valve pocket of knowing ultra-high pressure safety valve 1, the film viewing screen of video surveillance devices 7 is placed on the next door of control desk 14, highly be 1.8m, observe bubble when being convenient to control, video surveillance devices 7 models are Olympus IV8435;
4, verification is a nitrogen with source of the gas 9, purity is 99.9%, by gas cylinder 10 through providing, be stored in the accumulator 13 after compressed machine 11 and super-pressure pump 12 second-compressed, the system demand pressure height is controlled by back-up valve on the control desk 14 15 and blowdown valve 16, source of the gas 9 is a nitrogen, and gas cylinder 10 models are WMA219-40-15, compressor 11, super-pressure pump 12 and accumulator 13 and control desk 14, comprise that back-up valve 15 and blowdown valve 16 are German UHDE company and manufacture and design separately, do not have concrete model, compressor 11 is a nitrogen compressor, maximum working pressure (MOP) 100MPa, ratio of compression 1: 150, super-pressure pump 12 gas maximum working pressure (MOP) 360MPa, liquid is 540MPa, the gas ratio of compression is 1: 796, accumulator 13 volume 0.0053m3, design pressure 540MPa, gas maximum working pressure (MOP) 360MPa, liquid are 540MPa.
5, for ensuring safety, set up security protection wall 8, its material is a reinforced concrete, the high 2100mm of wall, thick 400mm.
Claims (6)
1. the calibration equipment of a ultra-high pressure safety valve, it is characterized in that this device comprises ultra-high pressure safety valve (1), workbench (2), common U-bolt (3), super high pressure bend (4), UHV (ultra-high voltage) flange (5), video surveillance devices (7), security protection wall (8), source of the gas (9), gas cylinder (10), compressor (11), super-pressure pump (12), accumulator (13), back-up valve (15) on the control desk (14) and blowdown valve (16), wherein ultra-high pressure safety valve (1) is lying on the workbench (2), discharge flange up, with common U-bolt (3) ultra-high pressure safety valve (1) is fixed on the workbench (2), UHV (ultra-high voltage) flange (5) is connected with ultra-high pressure safety valve (1), one end of super high pressure bend (4) is connected with UHV (ultra-high voltage) flange (5), the other end passes security protection wall (8) and is connected with control desk (14), one side of accumulator (13) is connected with control desk (14) by super high pressure bend (4), opposite side is connected with super-pressure pump (12) by super high pressure bend (4), compressor (11) one sides are connected with gas cylinder (10) by super high pressure bend (4), opposite side is connected with super-pressure pump (12) by super high pressure bend (4), check is housed with source of the gas (9) in the gas cylinder (10), one video surveillance devices (7) is installed in ultra-high pressure safety valve (1) discharge flange top.
2. the calibration equipment of ultra-high pressure safety valve according to claim 1, the import that it is characterized in that described ultra-high pressure safety valve (1) is connected with bolt with UHV (ultra-high voltage) flange (5), the centre adds the UHV (ultra-high voltage) pad, in the outside, junction around coating butter, guarantee the sealing.
3. the calibration equipment of ultra-high pressure safety valve according to claim 1, it is characterized in that between described super high pressure bend (4) and UHV (ultra-high voltage) flange (5), control desk (14), accumulator (13), super-pressure pump (12), compressor (11) and the gas cylinder (10) all with being threaded, and coating butter around in the outside, junction, guarantee sealing.
4. the calibration equipment of ultra-high pressure safety valve according to claim 1, it is characterized in that described video surveillance devices (7), be installed in directly over the discharge flange of ultra-high pressure safety valve (1), and with can the clear view ultra-high pressure safety valve valve pocket of (1) be as the criterion, the film viewing screen of video surveillance devices (7) is placed on control desk (14) next door, and the position is as the criterion with convenient the observation.
5. the calibration equipment of ultra-high pressure safety valve according to claim 1, it is characterized in that described verification is to be provided by gas cylinder (10) with source of the gas (9), be stored in the accumulator (13) after compressed machine (11) and super-pressure pump (12) second-compressed, the system demand pressure height is controlled by back-up valve (15) on the control desk (14) and blowdown valve (16).
6. the calibration equipment of ultra-high pressure safety valve according to claim 1 is characterized in that described security protection wall (8) is to make with reinforced concrete, the high 2100mm of wall, thick 400mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201596888U CN201285349Y (en) | 2008-11-07 | 2008-11-07 | Verification apparatus for super-high safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201596888U CN201285349Y (en) | 2008-11-07 | 2008-11-07 | Verification apparatus for super-high safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201285349Y true CN201285349Y (en) | 2009-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201596888U Expired - Lifetime CN201285349Y (en) | 2008-11-07 | 2008-11-07 | Verification apparatus for super-high safety valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN201285349Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067244A (en) * | 2015-08-11 | 2015-11-18 | 上海中船三井造船柴油机有限公司 | Scavenging collector pipe safety valve working pressure test device and method |
| CN105443504A (en) * | 2015-12-18 | 2016-03-30 | 南京晨光集团有限责任公司 | Energy accumulator oil end gas permeation detection device |
| CN105715854A (en) * | 2014-12-03 | 2016-06-29 | 中国石油天然气股份有限公司 | Energy source accommodating equipment |
| CN113008546A (en) * | 2021-03-02 | 2021-06-22 | 上海化学工业检验检测有限公司 | Portable safety valve calibration equipment and calibration method |
-
2008
- 2008-11-07 CN CNU2008201596888U patent/CN201285349Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715854A (en) * | 2014-12-03 | 2016-06-29 | 中国石油天然气股份有限公司 | Energy source accommodating equipment |
| CN105067244A (en) * | 2015-08-11 | 2015-11-18 | 上海中船三井造船柴油机有限公司 | Scavenging collector pipe safety valve working pressure test device and method |
| CN105443504A (en) * | 2015-12-18 | 2016-03-30 | 南京晨光集团有限责任公司 | Energy accumulator oil end gas permeation detection device |
| CN113008546A (en) * | 2021-03-02 | 2021-06-22 | 上海化学工业检验检测有限公司 | Portable safety valve calibration equipment and calibration method |
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Legal Events
| Date | Code | Title | Description |
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Owner name: NANJING JINCHUANG NONFERROUS METALS TECHNOLOGY DEV Free format text: FORMER OWNER: NANJING BOILER + PRESSURE VESSEL SUPERVISION AND INSPECTION INSTITUTE Effective date: 20130318 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20130318 Address after: 210002, No. 739, Ann Sheng Road, Binjiang economic and Technological Development Zone, Jiangning District, Jiangsu, Nanjing Patentee after: Nanjing Jinchuang Non-Ferrous Metal Technology Development Co., Ltd. Address before: Nanjing City, Jiangsu province 210002 Hongwu Road No. 340 Patentee before: Nanjing Boiler & Pressure Vessel Supervision and Inspection Institute |
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| ASS | Succession or assignment of patent right |
Owner name: NANJING BOILER + PRESSURE VESSEL SUPERVISION AND I Free format text: FORMER OWNER: NANJING JINCHUANG NONFERROUS METALS TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20140527 |
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Free format text: CORRECT: ADDRESS; FROM: 210002 NANJING, JIANGSU PROVINCE TO: 210019 NANJING, JIANGSU PROVINCE |
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Effective date of registration: 20140527 Address after: 210019, 3 Jiangdong Street, Jialing, Jianye District, Jiangsu, Nanjing Patentee after: Nanjing Boiler & Pressure Vessel Supervision and Inspection Institute Address before: 210002, No. 739, Ann Sheng Road, Binjiang economic and Technological Development Zone, Jiangning District, Jiangsu, Nanjing Patentee before: Nanjing Jinchuang Non-Ferrous Metal Technology Development Co., Ltd. |
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| ASS | Succession or assignment of patent right |
Owner name: NANJING JINCHUANG NONFERROUS METALS TECHNOLOGY DEV Free format text: FORMER OWNER: NANJING BOILER + PRESSURE VESSEL SUPERVISION AND INSPECTION INSTITUTE Effective date: 20140828 |
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Free format text: CORRECT: ADDRESS; FROM: 210019 NANJING, JIANGSU PROVINCE TO: 210002 NANJING, JIANGSU PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140828 Address after: 210002, No. 739, Ann Sheng Road, Binjiang Economic Development Zone, Jiangning District, Jiangsu, Nanjing Patentee after: Nanjing Jinchuang Non-Ferrous Metal Technology Development Co., Ltd. Address before: 210019, 3 Jiangdong Street, Jialing, Jianye District, Jiangsu, Nanjing Patentee before: Nanjing Boiler & Pressure Vessel Supervision and Inspection Institute |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090805 |