CN104690482A - Repairing process of sealing surface of valve seat of high-pressure bypass main valve for ultra-supercritical thermal power generating unit - Google Patents
Repairing process of sealing surface of valve seat of high-pressure bypass main valve for ultra-supercritical thermal power generating unit Download PDFInfo
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- CN104690482A CN104690482A CN201510070376.4A CN201510070376A CN104690482A CN 104690482 A CN104690482 A CN 104690482A CN 201510070376 A CN201510070376 A CN 201510070376A CN 104690482 A CN104690482 A CN 104690482A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
- B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
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Abstract
The invention discloses a repairing process of a sealing surface of a valve seat of a high-pressure bypass main valve for an ultra-supercritical thermal power generating unit. The repairing process comprises the following steps: (1) manufacturing a false valve cover; (2) machining an inlet-end welding groove in the valve body; (3) machining an outlet-end welding groove in the valve body; (4) turning an original overlaying layer at the sealing surface of the valve seat of the valve body; (5) mounting the false valve cover on the valve body, and performing thermal pretreatment on the valve body provided with the false valve cover before overlaying; (6) overlaying a transitional layer; (7) overlaying a working layer; (8) detecting the hardness and the color; (9) performing hydrostatic testing to complete the repair of the whole sealing surface of the valve seat of the main valve. The repairing process of the sealing surface of the valve seat of the high-pressure bypass main valve for the ultra-supercritical thermal power generating unit has the benefits that by detecting the hardness and the color, the defects of cracks, pores and the like are avoided; the hardness value HRC of the sealing surface of the valve seat in the valve body is 40-42; the tightness of the sealing surface of the valve seat meets relevant technical requirements after a valve element and the valve seat are checked; the hydrostatic testing pressure is 42MPa and is higher than 1.5 times of the pressure, and the test is kept for two hours while no leakage is found.
Description
Technical field
The present invention relates to technique for overlaying field, particularly relate to the renovation technique of the high other main valve sealing surface of seat of a kind of ultra supercritical coal-fired unit.
Background technology
The superheater outlet operating pressure of the 1000MW ultra-supercritical coal-fired power generating units that power plant is used is 27.56MPa, and temperature is 605 DEG C.The main steam high pressure bypass duct main valve of ultra-supercritical coal-fired power generating units is distributed with four, and its entrance point valve body material is SA182-F92, and port of export valve body material is SA182-F91.Find during high other main valve Disintegration overhaul that sealing surface of seat wherein exists penetrating crack, the whole valve body of through crack is positioned at the weld-deposited cladding at sealing surface of seat place.Crackle causes valve sealing face tightness poor, and interior leakage is serious, directly affects the economical of generating set and normally runs with equipment.Because the material of valve body adopts SA182-F92/F91, its cost is higher, and as integral replacing, cost is larger.Thus a kind of appearance high other main valve sealing surface of seat being carried out to renovation technique is needed badly, to reduce the cost of overhaul.
By the domestic height not yet existed ultra supercritical coal-fired unit, main valve sealing surface of seat carries out renovation technique.
Summary of the invention
The object of the invention is to: the renovation technique that the high other main valve sealing surface of seat of a kind of ultra supercritical coal-fired unit is provided.
Technical problem solved by the invention can realize by the following technical solutions:
The renovation technique of the high other main valve valve seat of ultra supercritical coal-fired unit, comprises the following steps:
(1) cleaning scrubbing inspection is carried out to valve body, each spot size of mapping valve body, and make false valve gap;
(2) adopt the valve gap end of chuck clamping valve body, correct the perpendicular degree of cylindrical of the entrance point of valve body, and press the entrance point bevel for welding of JB/T395-2002 standard processing valve body;
(3) adopt the valve gap end of chuck clamping valve body, correct the perpendicular degree of cylindrical of the port of export of valve body, and press the port of export bevel for welding of JB/T395-2002 standard processing valve body;
(4) adopt the chuck clamping entrance point of valve body or the port of export of valve body, correct the cylindrical of the valve gap end of valve body, endoporus and plane, ensure its perpendicularity and concentricity thereof, then the initial pile layer at the sealing surface of seat place of turning valve body;
(5) false valve gap is installed on valve body, the valve body being provided with false valve gap is carried out the pre-heat treatment before built-up welding, with hot percentage elongation lower than 150 DEG C of calculating per hour, the heating-up temperature of the pre-heat treatment is 300 DEG C ~ 350 DEG C again, heat time is 2.5h ~ 8h, and temperature retention time is 5h ~ 10h;
(6) adopt the Ni-based wlding of ENiCrMo-3 to carry out built-up welding transition zone, transition zone built-up welding thickness is 3mm, and built-up welding interlayer temperature controls at 300 DEG C ~ 350 DEG C;
(7) mode of SMAW is adopted to carry out work built-up welding, wlding adopts stellite Stellite6, and weld deposit process Current Control is at 400A ~ 500A, and voltage is 30V ~ 40V, speed of welding is 200mm/min ~ 300mm/min, and working lining built-up welding thickness is 5mm;
(8) removing surface of built-up welding working lining is clean, then carry out hardness and coloration detection, after meeting the requirements through hardness and coloration detection, carry out machined and grinding, ensure the perpendicularity in process and concentricity;
(9) finally spool and valve seat are carried out sealing surface check, and complete the water pressure test, complete the reparation of whole main valve sealing surface of seat.
In a preferred embodiment of the invention, also comprised before step (5) and coloration detection is carried out to the turning position of valve body, if find there is crackle or gas hole defect in the turning position of valve body, milling tools is adopted to polish, until defect polishing is clean, turning position is polished into rounding off simultaneously, avoids welding dead angle, reach build-up welding repair process requirement.
In a preferred embodiment of the invention, the sealing surface of seat also comprised before step (8) in the valve body after to reparation carries out post weld heat treatment to eliminate internal stress, with hot percentage elongation lower than 150 DEG C of calculating per hour, being heated to temperature is 700 DEG C ~ 800 DEG C, heat time is 6h ~ 10h, temperature retention time is 5h ~ 10h, then cools to room temperature with the furnace.
Owing to have employed technical scheme as above, beneficial effect of the present invention is: through hardness and coloration detection, the defect such as flawless and pore, sealing surface of seat hardness number HRC in valve body is 40 ~ 42, sealing surface of seat tightness after spool and valve seat are checked all reaches associated specifications, and hydraulic test pressure is 42MPa, is greater than 1.5 times of pressure, and keep two hours, do not find to leak.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, setting forth the present invention further below.
Embodiment 1
The renovation technique of the high other main valve valve seat of ultra supercritical coal-fired unit of the present embodiment, comprises the following steps:
(1) before machined, carry out cleaning scrubbing inspection to valve body, each spot size of mapping valve body, and make false valve gap, wherein, the control errors of false valve gap and valve body fit dimension is at (-0.02-0.05).
(2) adopt the valve gap end of chuck clamping valve body, correct the perpendicular degree of cylindrical of the entrance point of valve body, and press the entrance point bevel for welding of JB/T395-2002 standard processing valve body.Before machined work, bracing frame should be carried out and ensure to install firmly, guarantee turning equipment safe handling and add safety in man-hour, in addition, the valve gap end of valve body arranging cushion block, preventing from pressing from both sides the valve gap end face damaging valve body.
(3) adopt the valve gap end of chuck clamping valve body, correct the perpendicular degree of cylindrical of the port of export of valve body, and press the port of export bevel for welding of JB/T395-2002 standard processing valve body.The valve gap end of valve body arranges cushion block, prevents from pressing from both sides the valve gap end face damaging valve body.
(4) the chuck clamping entrance point of valve body or the port of export of valve body is adopted, correct the cylindrical of the valve gap end of valve body, endoporus and plane, ensure its perpendicularity and concentricity thereof, then the initial pile layer at the sealing surface of seat place of turning valve body, working width and depth dimensions should meet the requirement of sealing surface of seat remaining thickness, but must guarantee that original overlay cladding turning is clean.In addition, the entrance point of the valve body of valve body or the port of export of valve body arrange cushion block, prevent folder from damaging the inlet end face of valve body or the exit end face of valve body.
(5) carry out coloration detection to the turning position of valve body, if find there is crackle or gas hole defect in the turning position of valve body, adopts milling tools to polish, until defect polishing is clean, it adopts coloration detection to confirm equally.Turning position is polished into rounding off simultaneously, avoids welding dead angle, reach build-up welding repair process requirement.
(6) false valve gap is installed on valve body, then the valve body being provided with false valve gap is put into electric furnace and carry out the pre-heat treatment before built-up welding, with the 100 DEG C of calculating per hour of hot percentage elongation, the heating-up temperature of the pre-heat treatment is 300 DEG C, and the heat time is 3h, and temperature retention time is 7h.Valve body, under the supporting role of false valve gap, prevents the appearance of valve body temperature distortion phenomenon effectively.
(7) because valve body material is SA182-F92/F91, as direct built-up welding Si Taili cobalt-base alloys easily produces the delamination phenomenon of binding site.So nickel-bass alloy material can be used to carry out transition through test, built-up welding transition zone also should simplify as far as possible.Transition zone welding material should be selected can the working condition requirement of high other main valve, the welding material ENiCrMo-3 of Ni-based 625 alloy series can keep excellent high-temperature behavior below 700 DEG C, and its elevated temperature strength, high-temperature oxidation resistance, high-temperature corrosion-resistance performance are obviously better than the welding material ENiCrFe-3 in Ni-based WE182 series.In the present embodiment, adopt the Ni-based wlding of ENiCrMo-3 to carry out built-up welding transition zone, transition zone built-up welding thickness is 3mm, and built-up welding interlayer temperature controls at 300 DEG C.Meanwhile, except valve gap place is as except welding operating position, should stop to ventilate and exhaust opening existence in other positions, and use infrared thermometer to carry out monitoring temperature at any time in transition zone built-up welding gap.In addition, in order to avoid causing built-up welding transition zone to ftracture because of alternating hot and cold stress, should ensure that welding place is less than 30 DEG C with the temperature difference at the place of weldering.
(8) adopt the mode of SMAW to carry out work built-up welding, wlding adopts stellite Stellite6, and weld deposit process Current Control is at 450A, and voltage is 35V, and speed of welding is 250mm/min, and working lining built-up welding thickness is 5mm.Stellite Stellite6 has certain " red hardness " under 800 DEG C of high temperature, can ensure that high other main valve sealing surface of seat has good wearability, abrasion resistance, corrosion resistance under the steam flush condition of 605 DEG C.In addition, due to the complex structure of valve body, rigidity is large, stress distribution situation is different, can produce very large circumferential stress and alternating hot and cold stress, thus should be noted in weld deposit process: a, note striking and receive arc, prevents pore and crater crack; B, control molten bath in the same size, even, ensure processing dimension; C, welding direction must be consistent, welding along clockwise direction; D, backstep sequence, subregion welding.
(9) carry out post weld heat treatment to eliminate internal stress to the sealing surface of seat in the valve body after reparation, with the 100 DEG C of calculating per hour of hot percentage elongation, being heated to temperature is 750 DEG C, and the heat time is 7.5h, and temperature retention time is 7h, then cools to room temperature with the furnace.It mainly adopts overall electrical heating, high tempering, and wherein the parameter such as temperature, constant temperature time, warming and cooling rate of high tempering must take into account valve body and built-up welding working lining.
(10) removing surface of built-up welding working lining is clean, then carry out hardness and coloration detection, after meeting the requirements through hardness and coloration detection, carry out machined and grinding, ensure the perpendicularity in process and concentricity;
(11) finally spool and valve seat are carried out sealing surface check, and complete the water pressure test, complete the reparation of whole main valve sealing surface of seat.
According to above step, sealing surface of seat in valve body is through hardness and coloration detection, the defect such as flawless and pore, sealing surface of seat hardness number HRC in valve body is 42, sealing surface of seat tightness after spool and valve seat are checked all reaches associated specifications, and hydraulic test pressure is 42MPa, is greater than 1.5 times of pressure, and keep two hours, do not find to leak.
Embodiment 2
The renovation technique of the high other main valve valve seat of ultra supercritical coal-fired unit of the present embodiment, comprises the following steps:
(1) before machined, cleaning scrubbing inspection is carried out to valve body, each spot size of mapping valve body, and make false valve gap.
(2) adopt the valve gap end of chuck clamping valve body, correct the perpendicular degree of cylindrical of the entrance point of valve body, and press the entrance point bevel for welding of JB/T395-2002 standard processing valve body.
(3) adopt the valve gap end of chuck clamping valve body, correct the perpendicular degree of cylindrical of the port of export of valve body, and press the port of export bevel for welding of JB/T395-2002 standard processing valve body.
(4) the chuck clamping entrance point of valve body or the port of export of valve body is adopted, correct the cylindrical of the valve gap end of valve body, endoporus and plane, ensure its perpendicularity and concentricity thereof, then the initial pile layer at the sealing surface of seat place of turning valve body, working width and depth dimensions should meet the requirement of sealing surface of seat remaining thickness, but must guarantee that original overlay cladding turning is clean.
(5) carry out coloration detection to the turning position of valve body, if find there is crackle or gas hole defect in the turning position of valve body, adopts milling tools to polish, until defect polishing is clean, it adopts coloration detection to confirm equally.Turning position is polished into rounding off simultaneously, avoids welding dead angle, reach build-up welding repair process requirement.
(6) false valve gap is installed on valve body, then the valve body being provided with false valve gap is put into electric furnace and carry out the pre-heat treatment before built-up welding, with the 100 DEG C of calculating per hour of hot percentage elongation, the heating-up temperature of the pre-heat treatment is 350 DEG C, and the heat time is 3.5h, and temperature retention time is 5h.
(7) adopt the Ni-based wlding of ENiCrMo-3 to carry out built-up welding transition zone, transition zone built-up welding thickness is 3mm, and built-up welding interlayer temperature controls at 300 DEG C.
(8) adopt the mode of SMAW to carry out work built-up welding, wlding adopts stellite Stellite6, and weld deposit process Current Control is at 400A, and voltage is 30V, and speed of welding is 200mm/min, and working lining built-up welding thickness is 5mm.
(9) carry out post weld heat treatment to eliminate internal stress to the sealing surface of seat in the valve body after reparation, with the 100 DEG C of calculating per hour of hot percentage elongation, being heated to temperature is 800 DEG C, and the heat time is 8h, and temperature retention time is 5h, then cools to room temperature with the furnace.
(10) removing surface of built-up welding working lining is clean, then carry out hardness and coloration detection;
(11) finally spool and valve seat are carried out sealing surface check, and complete the water pressure test, complete the reparation of whole main valve sealing surface of seat.
According to above step, sealing surface of seat in valve body is through hardness and coloration detection, the defect such as flawless and pore, sealing surface of seat hardness number HRC in valve body is 40, sealing surface of seat tightness after spool and valve seat are checked all reaches associated specifications, and hydraulic test pressure is 42MPa, is greater than 1 times of pressure, and keep two hours, do not find to leak.
Embodiment 3
The renovation technique of the high other main valve valve seat of ultra supercritical coal-fired unit of the present embodiment, comprises the following steps:
(1) before machined, cleaning scrubbing inspection is carried out to valve body, each spot size of mapping valve body, and make false valve gap.
(2) adopt the valve gap end of chuck clamping valve body, correct the perpendicular degree of cylindrical of the entrance point of valve body, and press the entrance point bevel for welding of JB/T395-2002 standard processing valve body.
(3) adopt the valve gap end of chuck clamping valve body, correct the perpendicular degree of cylindrical of the port of export of valve body, and press the port of export bevel for welding of JB/T395-2002 standard processing valve body.
(4) the chuck clamping entrance point of valve body or the port of export of valve body is adopted, correct the cylindrical of the valve gap end of valve body, endoporus and plane, ensure its perpendicularity and concentricity thereof, then the initial pile layer at the sealing surface of seat place of turning valve body, working width and depth dimensions should meet the requirement of sealing surface of seat remaining thickness, but must guarantee that original overlay cladding turning is clean.
(5) carry out coloration detection to the turning position of valve body, if find there is crackle or gas hole defect in the turning position of valve body, adopts milling tools to polish, until defect polishing is clean, it adopts coloration detection to confirm equally.Turning position is polished into rounding off simultaneously, avoids welding dead angle, reach build-up welding repair process requirement.
(6) false valve gap is installed on valve body, then the valve body being provided with false valve gap is put into electric furnace and carry out the pre-heat treatment before built-up welding, with the 50 DEG C of calculating per hour of hot percentage elongation, the heating-up temperature of the pre-heat treatment is 350 DEG C, and the heat time is 7h, and temperature retention time is 10h.
(7) adopt the Ni-based wlding of ENiCrMo-3 to carry out built-up welding transition zone, transition zone built-up welding thickness is 3mm, and built-up welding interlayer temperature controls at 350 DEG C.
(8) adopt the mode of SMAW to carry out work built-up welding, wlding adopts stellite Stellite6, and weld deposit process Current Control is at 500A, and voltage is 40V, and speed of welding is 300mm/min, and working lining built-up welding thickness is 5mm.
(9) carry out post weld heat treatment to eliminate internal stress to the sealing surface of seat in the valve body after reparation, with the 100 DEG C of calculating per hour of hot percentage elongation, being heated to temperature is 800 DEG C, and the heat time is 8h, and temperature retention time is 10h, then cools to room temperature with the furnace.
(10) removing surface of built-up welding working lining is clean, then carry out hardness and coloration detection;
(11) finally spool and valve seat are carried out sealing surface check, and complete the water pressure test, complete the reparation of whole main valve sealing surface of seat.
According to above step, sealing surface of seat in valve body is through hardness and coloration detection, the defect such as flawless and pore, sealing surface of seat hardness number HRC in valve body is 40, sealing surface of seat tightness after spool and valve seat are checked all reaches associated specifications, and hydraulic test pressure is 42MPa, is greater than 1.2 times of pressure, and keep two hours, do not find to leak.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (3)
1. the renovation technique of the high other main valve valve seat of ultra supercritical coal-fired unit, is characterized in that, comprise the following steps:
(1) cleaning scrubbing inspection is carried out to valve body, each spot size of mapping valve body, and make false valve gap;
(2) adopt the valve gap end of chuck clamping valve body, correct the perpendicular degree of cylindrical of the entrance point of valve body, and press the entrance point bevel for welding of JB/T395-2002 standard processing valve body;
(3) adopt the valve gap end of chuck clamping valve body, correct the perpendicular degree of cylindrical of the port of export of valve body, and press the port of export bevel for welding of JB/T395-2002 standard processing valve body;
(4) adopt the chuck clamping entrance point of valve body or the port of export of valve body, correct the cylindrical of the valve gap end of valve body, endoporus and plane, ensure its perpendicularity and concentricity thereof, then the initial pile layer at the sealing surface of seat place of turning valve body;
(5) false valve gap is installed on valve body, the valve body being provided with false valve gap is carried out the pre-heat treatment before built-up welding, with hot percentage elongation lower than 150 DEG C of calculating per hour, the heating-up temperature of the pre-heat treatment is 300 DEG C ~ 350 DEG C again, heat time is 2.5h ~ 8h, and temperature retention time is 5h ~ 10h;
(6) adopt the Ni-based wlding of ENiCrMo-3 to carry out built-up welding transition zone, transition zone built-up welding thickness is 3mm, and built-up welding interlayer temperature controls at 300 DEG C ~ 350 DEG C;
(7) mode of SMAW is adopted to carry out work built-up welding, wlding adopts stellite Stellite6, and weld deposit process Current Control is at 400A ~ 500A, and voltage is 30V ~ 40V, speed of welding is 200mm/min ~ 300mm/min, and working lining built-up welding thickness is 5mm;
(8) removing surface of built-up welding working lining is clean, then carry out hardness and coloration detection, after meeting the requirements through hardness and coloration detection, carry out machined and grinding, ensure the perpendicularity in process and concentricity;
(9) finally spool and valve seat are carried out sealing surface check, and complete the water pressure test, complete the reparation of whole main valve sealing surface of seat.
2. the renovation technique of the high other main valve valve seat of ultra supercritical coal-fired unit as claimed in claim 1, it is characterized in that, also comprised before step (5) and coloration detection is carried out to the turning position of valve body, if find there is crackle or gas hole defect in the turning position of valve body, adopt milling tools to polish, until defect polishing is clean, turning position is polished into rounding off simultaneously, avoid welding dead angle, reach build-up welding repair process requirement.
3. the renovation technique of the high other main valve valve seat of ultra supercritical coal-fired unit as claimed in claim 1, it is characterized in that, the sealing surface of seat also comprised before step (8) in the valve body after to reparation carries out post weld heat treatment to eliminate internal stress, with hot percentage elongation lower than 150 DEG C of calculating per hour, being heated to temperature is 700 DEG C ~ 800 DEG C, heat time is 6h ~ 10h, and temperature retention time is 5h ~ 10h, then cools to room temperature with the furnace.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2823457A1 (en) * | 2001-04-13 | 2002-10-18 | Pecquet Tesson Et Cie | METHOD FOR REPAIRING A VALVE SEAT AND EQUIPMENT FOR IMPLEMENTING THE METHOD |
| RU2010127047A (en) * | 2010-07-01 | 2012-01-10 | Государственное образовательное учреждение высшего профессионального образования "Ярославский государственный технический универси | METHOD FOR MANUFACTURING OR RESTORING SADDLE VALVES OF CAST IRON HEADS OF INTERNAL COMBUSTION ENGINE CYLINDERS BY SURFACE METHOD |
| CN103521939A (en) * | 2013-10-31 | 2014-01-22 | 南通市电站阀门有限公司 | Valve sealing face repairing process method |
| CN103639643A (en) * | 2013-11-27 | 2014-03-19 | 江苏力沛电力工程技术服务有限公司 | Repair technology for valve sealing surface |
-
2015
- 2015-02-10 CN CN201510070376.4A patent/CN104690482B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2823457A1 (en) * | 2001-04-13 | 2002-10-18 | Pecquet Tesson Et Cie | METHOD FOR REPAIRING A VALVE SEAT AND EQUIPMENT FOR IMPLEMENTING THE METHOD |
| RU2010127047A (en) * | 2010-07-01 | 2012-01-10 | Государственное образовательное учреждение высшего профессионального образования "Ярославский государственный технический универси | METHOD FOR MANUFACTURING OR RESTORING SADDLE VALVES OF CAST IRON HEADS OF INTERNAL COMBUSTION ENGINE CYLINDERS BY SURFACE METHOD |
| CN103521939A (en) * | 2013-10-31 | 2014-01-22 | 南通市电站阀门有限公司 | Valve sealing face repairing process method |
| CN103639643A (en) * | 2013-11-27 | 2014-03-19 | 江苏力沛电力工程技术服务有限公司 | Repair technology for valve sealing surface |
Non-Patent Citations (2)
| Title |
|---|
| 田平: "电站高温高压阀门密封面的修复", 《冶金动力》 * |
| 赵健等: "进口350 MW 汽轮机中压调阀密封面微弧焊修复", 《山西电力》 * |
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Effective date of registration: 20170302 Address after: 201413 Shanghai city Fengxian District new Siping Road No. 1333 Patentee after: Shanghai Pingan High-pressure Adjust Valve Co., Ltd. Patentee after: Shanghai Ya An Power Station Auxiliary Equipment Co., Ltd. Address before: 201413 Shanghai city Fengxian District new Siping Road No. 1333 Patentee before: Shanghai Pingan High-pressure Adjust Valve Co., Ltd. |