CN101870031A - Construction method for welding furnace tube and dissimilar steel - Google Patents
Construction method for welding furnace tube and dissimilar steel Download PDFInfo
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- CN101870031A CN101870031A CN201010223966A CN201010223966A CN101870031A CN 101870031 A CN101870031 A CN 101870031A CN 201010223966 A CN201010223966 A CN 201010223966A CN 201010223966 A CN201010223966 A CN 201010223966A CN 101870031 A CN101870031 A CN 101870031A
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Abstract
The invention relates to a construction method of a furnace tube and a dissimilar steel, comprising the following steps: adopting a special fixture to assemble welded bonds, cleaning weldments, filling argon in a pipeline for replacement, welding the pipeline layer by layer, checking appearance after welding, performing weld bond repair and rework on unqualified pipelines, carrying out PT and RT detection after qualification confirmation, and carrying out thermal treatment on the welded bonds; hoisting in place after hardness test, ball passing test and strength test are qualified; and detecting system gas tightness, issuing completion documents. The invention can realize furnace tube conversion from entire import to localization, lowers equipment acquisition value, facilitates transportation, and can ensure construction period and quality in the overhauling process in a chemical industry factory. By repeated simulation tests and construction of similar projects, the welding and thermal treatment technologies of dissimilar steels are comprehensively mastered, thus obtaining excellent economical and social benefits and meeting the requirements of proprietors.
Description
Technical field
The present invention relates to the welding method of pipe fitting in the building engineering construction, refer in particular to a kind of boiler tube and dissimilar steel welding procedure method.
Background technology
In recent years, for satisfying the requirement of devices such as petrochemical industry and chemical fertilizer industry, the application of centrifugal casting furnace tube has had very big progress, and these boiler tubes mostly bear high temperature (up to 1200 ℃), high pressure (up to 4Mpa), and it is working under the long period continuously, so very tight to the welding quality requirement.The HK-40 boiler tube is exactly typical Ni-based austenitic stainless steel, is widely used in the reburner in chemical plant.Reduce because crack furnance radiation section furnace tube stretches out the portion temperature of burner hearth,, use Cr-Mo low-alloy steel flange usually for economical with materials.Therefore, exploitation HK40O boiler tube and 15CrMo dissimilar steel Welder method are the needs that petrochemical industry is built.Large-scale oil plant at home, along with the arrival of service life of equipment, the reburner radiant tube is introduced to absorb to field fabrication by full import development is installed.Transform the width of cloth as 250 tons of/year oil refining apparatus hydrogenation of China Petrochemical Industry's Chang Ling oil plant hydrogen manufacturing conversion furnace and penetrate the HK-40 boiler tube of pipe employing U.S. company import and the homemade on-the-spot welding of 15CrMo hubbed flange.This stove is the visual plant of oil plant, and the quality of welding quality is to service life of boiler tube and prevent that booster has very big influence under the high temperature.
Summary of the invention
The objective of the invention is to be improved and innovate at the shortcoming that exists in the background technology and problem, a kind of very strong operability that has is provided, the welding of HK400 centrifugal casting furnace tube and 15CrMo dissimilar steel and heat treatment is had the boiler tube and the dissimilar steel welding procedure method of directive function.
The inventive method may further comprise the steps:
1) at first adopts the special mould clamp group to weld bond, guarantee the concentricity of butt joint.
2) clear up weldment then, argon filling displacement in pipeline is successively welded pipeline, does visual examination after weld, and the underproof weld bond that carries out is reprocessed, and confirms to carry out PT, RT detection after qualified, carries out weld bond heat treatment then, and concrete operations are as follows:
With acetone groove and both sides thereof are removed totally before a, the weldering, and wrapped asbestos board, adopt little electric current, high weldering speed, string(er) bead welding in the groove both sides; The striking of welding is carried out in groove, and welding gun is supplied gas in advance during the starting the arc, and adopts high-frequency arc strike, should use current attenuation and gas shield device during the breath arc, and the welding arc crater must fill up, and during welding, the high temperature gummed tape that sticks on the groove place is with welding with opening; Every layer of postwelding removed welding slag, and answers each laminar surface defective of scrutiny, and qualified back preheating can be welded sublevel, and the joint of every layer of welding bead all should stagger, and a layer temperature control is no more than 150 ℃, whenever layer by layer between joint should stagger, should fill up arc crater when receiving arc;
The heat treatment of b, weld seam: adopt the electrical heating method furnace tubing, the oxy-acetylene heating flange, and use the thermocouple assay temperature, to 150-200 ℃, constant temperature 30 minutes evenly heats in distance weld bond 100mm before the weldering, prevent hot-spot, should be incubated near the thermal treatment zone, to reduce heat loss; Postwelding in time carries out after heat, is benchmark with the weld bond center on flange, heating in being not less than three times of weld widths, by less than 220 ℃/time the speed heating, rise to 300-350 ℃, constant temperature slowly cooled to room temperature and can untie heat tape after 1 hour.
3) carry out hardness test, through ball test, strength test again, can lift after all tests, the pass the test and put in place.
4) carry out system's air-tightness at last and detect, provide completion information and promptly finish.
The described boiler tube of the inventive method is the HK400 boiler tube.Described dissimilar steel is the 15CrMo dissimilar steel.
Advantage of the present invention and beneficial effect:
The present invention can change the full import boiler tube in past to production domesticization, reduce equipment purchasing and be worth, and convenient transportation can guarantee the duration in the maintenance engineering of chemical plant, ensure the quality of products.And, grasped this dissimilar steel welding and heat treated technology by the repeatedly construction of simulated test, similar engineering comprehensively, and obtained good economic benefit and social benefit, reach owner's requirement, the market of having stood firm.
The present invention obtains many successes and uses in China Petrochemical Industry's Chang Ling oil plant 500 tons of/year oil refining apparatus hydrogenation hydrogen manufacturing conversion furnace and the hydrogen manufacturing reburner transformation of Ba Ling branch company of China Petrochemical Industry, and obtains chemical industry petrochemical industry construction system solder technology and welding equipment exchanging meeting argumentative writing and choose prize such as three.500 tons of/year oil refining apparatus hydrogenation of China Petrochemical Industry's Chang Ling oil plant hydrogen manufacturing conversion furnace is chosen as national outstanding welding engineering by Chinese engineering construction welding association.
Description of drawings
Fig. 1 is a process chart of the present invention.
Groove type structural representation when Fig. 2 welds for the present invention.
Fig. 3 is a jig group butt welding mouth structure schematic diagram of the present invention.
Description of reference numerals: 1, adhesive plaster sealing, 2, groove, 3, argon shield.
The specific embodiment
Specific embodiment:
1, adopts the special mould clamp group to weld bond, both can guarantee the concentricity of boiler tube and flange, can carry out bottom back of weld argon-filled protection again.
2, the oil removal in groove and the both sides 20mm width range thereof is clean before the weldering with acetone, until silvery white metal true qualities occurring.Cleaning tool should be special-purpose and be kept clean, and prevents to contact with iron the carburizing phenomenon to occur.And in the scope of each 100 millimeters width of groove both sides, wrap asbestos board and prevent spatter thing damage mother metal.Adopt little electric current, high weldering speed, string(er) bead welding.
3, the boiler tube root run is the key that influences the whole welding line quality, and tack weld should conscientiously be checked, if any defectives such as lack of penetration, crackles, should remove, and weld again.
4, the striking of boiler tube welding must be carried out in groove, forbids not allow to have the vestige of arc scratch mother metal at boiler tube surface striking or examination electric current outside workpiece grooves.
5, during the starting the arc, welding gun must be supplied gas in advance, and adopts high-frequency arc strike, during the breath arc, should use current attenuation and gas shield device, and the welding arc crater must fill up, and during welding, the high temperature gummed tape that sticks on the groove place should be with welding with opening.
6, every layer of postwelding must in time be removed welding slag, and answers each laminar surface defective of scrutiny, and qualified back preheating can be welded sublevel, the joint of every layer of welding bead all should stagger, layer temperature control is no more than 150 ℃, and the weld seam of 15CrMo pipeline is as interrupting preheating again when welding again for some reason.Whenever layer by layer between joint should stagger, should fill up arc crater when receiving arc.
7, employed grinding wheel can only be exclusively used in the mill stainless steel, and the instrument of used wire brush and removing welding slag is made by stainless steel without exception.
8, the heat treatment of weld seam should be avoided HK-40 as far as possible and easily produce the transformation of б phase fragility in the time of 475 ℃, guarantees that again the 15CrMoo postwelding slowly cools off, and eliminates hydrogen in the weld seam, reduces joint fragility.We adopt the electrical heating method furnace tubing, the oxy-acetylene heating flange, and use the thermocouple assay temperature, to 150-200 ℃, constant temperature 30 minutes evenly heats in distance weld bond 100mm, prevents hot-spot before the weldering, should be incubated near the thermal treatment zone, to reduce heat loss.Postwelding in time carries out after heat.On flange, be benchmark with the weld bond center, heating in being not less than three times of weld widths, by less than 220 ℃/time the speed heating, rise to 300-350 ℃, constant temperature slowly cooled to room temperature and can untie heat tape after 1 hour.
9, weld seam mechanical performance test:
In visual examination. after penetrant inspection and radiographic inspection are qualified, carry out the test specimen mechanical test.
Microscopic structure:
15CrMo side heat affected area ferrite+pearlite
Weld metal zone austenite+MC
HK-40 side heat affected area austenite+б phase
Mother metal austenite+б phase.
Technological principle of the present invention:
The present invention has mainly introduced qualification of welding procedure, welding conditions and site operation main points on the basis of these two kinds of dissimilar steel being carried out necessary weldability analysis.
1, hydrogenation hydrogen manufacturing conversion furnace technological parameter:
T goes out=and 800 ℃ of T go into=and 500
P goes out=and 2.05Mpa P goes into=2.35Mpa
The width of cloth is penetrated pipe Φ 127 * 12 * 127m totally 60 120 road weld bonds.
HK-40 belongs to austenitic heat-resistance steel, the width of cloth section of penetrating that is widely used in petrochemical industry hydrogenation hydrogen manufacturing conversion furnace, it has good antioxygenic property, the anti-carburizing energy, elevated temperature strength and plasticity, because the crystal grain of founding materials is thick, makes creep resistant fracture strength (being creep rupture strength) higher than compact grained, its design and use life-span was generally 100,000 hours.Usually use nickel-base welding rod, adopt little electric current, weldering fast, cooling fast, postwelding does not need heat treatment.
15CrMo is a pearlite heatproof steel, has good heat resistance and non-oxidizability, but when welding if cooling velocity is fast, then easily form hardened structure, joint fragility increases.Therefore require preheating before the weldering, postwelding requires heat treatment, to eliminate welding stress and to improve joint performance.
The chemical analysis of HK-40 and 15CrMo, physical property is as follows:
As seen from the above, the thermal conductivity factor of two kinds of materials, linear expansion coefficient and chemical analysis have than big-difference, so the welding composition and the changes of properties of head is a more complicated, easily produce heat cracking, and wherein normal temperature and the high-temp plastic of HK-40 is little, so want the content of harmful elements such as strict restriction P, S, reduce the generation of б phase.
2, qualification of welding procedure:
In order to guarantee that weld seam at high temperature has good stable and heat resistance, strict chemical analysis and the metallographic structure of controlling and guaranteeing weld seam answered in anti-hydrogen-type corrosion, and the generation that suppresses the б phase makes it to be not less than the high-temperature behavior of mother metal.We have selected for use the Inconel82 welding wire of U.S.'s import and ERNiCrFe-3 welding rod (Inconel182) to adopt argon arc welding bottoming, manual electric arc welding capping.The chemical analysis of welding wire, welding rod is as follows:
| Chemical analysis | C | Si | Mn | P | S | Cr | Ni? | ?Ti |
| Welding rod Inconel 182 | 0.066 | 0.52 | 6.71 | 0.005 | 0.006 | 14.29 | 67.15 | 0.43 |
| Welding wire Inconel 82 | 0.056 | 0.21 | 2.76 | 0.005 | 0.010 | 18.85 | 73.25 | 0.41 |
Welding conditions:
The plant of the inventive method:
1, radiant tube (HK-40) should be done qualification of welding procedure earlier before welding with W.N flange (15CrMo), mother metal chemical analysis, mechanical performance, and Metallographic Analysis, welding rod welding wire chemical analysis is analyzed.
2, strict wlding keeping, clear Xian, provide, receive, recovery system.Accomplish the personal management, write down complete.The purity of argon gas is not less than 99.99%.
3, construction equipment:
| Sequence number | The machinery title | Model | | Quantity | Remarks | |
| 1 | | 50t | Platform | 1 | ? | |
| 2 | Autocrane | 12t | |
1 | ? | |
| 3 | Double passenger-cargo | 1t | Platform | 1 | ? | |
| 4 | |
2~10t | Individual | 5 | ? | |
| 5 | Jack | 16t | Individual | 1 | ? | |
| 6 | Abrasive wheel cutting | Φ400 | Platform | 2 | ? | |
| 7 | Hydraulic test | SY600 | Platform | 1 | ? | |
| 8 | Electric hammer | 2IC2--22 | |
1 | ? | |
| 9 | All kinds of electric welding machines | ? | Platform | 8 | ? | |
| 10 | Welding rod drying box | ? | |
1 | ? | |
| 11 | X-ray flaw detector | ? | |
1 | ? | |
| 12 | Hoist | 5t | Platform | 2 | ? | |
| 13 | Coaster | ? | Individual | 4 | ? | |
| 14 | Fairlead | ? | Individual | 2 | ? | |
| 15 | Steel wire rope | ? | m | 500 | ? | |
| 16 | All kinds of wire clips, suspension ring etc. | ? | Individual | 20 | ? |
| Sequence number | The machinery title | Model | Unit | Quantity | Remarks |
| 17 | Channel-section steel | [16 | m | 65 | ? |
| 18 | Steel pipe | φ76 | m | 20 | ? |
| 19 | Sleeper | ? | Root | 300 | ? |
Quality control of the present invention:
1, bear the welder of this stove welding, must be through passing the examination, and hold the quality certification of respective item, and there is the welder of the quality certification not carry out the boiler tube welding continuous half a year, should take an examination again.
2, groove face should be smooth, and groove and both sides 20mm polish metallic luster with the planted agent and do not allow defectives such as oxide skin, crackle, interlayer, and the groove of boiler tube and flange is also answered dyeing inspection, do not allow to occur processing or manufacturing defect.
3, safeguard procedures are taked at the scene: windproof, rainproof, antifreeze.
When 4, weldering occurs touching tungsten, should stop welding, welding again after cleaning out.The time send argon gas earlier in welding, back striking, welding is fast should receive arc earlier when finishing, after stop the supple of gas or steam, to note filling up arc crater during the receipts arc.
5, strengthen quality monitoring, the per pass operation is checked by the special messenger, in strict accordance with the construction of technology guiding book, can carry out next procedure after last process is qualified.
6, face of weld does not allow defectives such as crackle, pore, arc crater, slag inclusion; The weld seam undercut degree of depth is not more than 0.5mm, and undercut length in both sides is less than 10% of this fusion length; Weld seam and mother metal are answered rounding off, must not be lower than mother metal, and weld reinforcement is not more than 1.5mm, and unfitness of butt weld should be less than 0.25mm.Weld width is no more than bevelled edge 2mm with every limit and is advisable.
7, the 15CrMo flange is carried out 100% ultrasonic examination, note finding crackle.The groove of all butt joint weld bonds, root layer welding bead, face of weld answer 100% to carry out penetrant inspection.Penetrant inspection is undertaken by the regulation of appendix H standard among the GB150-89, and all butt welds must be carried out the 100%X radiographic inspection, and meets the II grade standard in " steel melting banjo fixing butt jointing radiography and quality grading " GB3323-87 standard.
8, the ball (Di is an ips) of diameter 〉=0.98Di is adopted in logical ball inspection, guarantees that the weld bond inwall is concordant, prevents that the hydrogen gas stream collision root of weld from producing electrostatic spark.
9, tested for hardness immediately after the heat treatment, weld metal zone, heat affected area hardness should be not more than 125% of mother metal hardness.
10, radiant tube should be in Non-Destructive Testing, carries out the single tube water pressure test after post weld heat treatment is qualified, can hang in the stove after the water pressure test is qualified.
11, the pressure testing water wants clean, and the total content of chlorion should must not contain harmful impurity less than 25ppm in the water.Water temperature must not be lower than 5 ℃, otherwise antifreezing measures must be arranged.
12, the water pressure test must be with two Pressure gauges that range is identical and calibrated, and manometric range is 2 times of test pressure.
13, should slowly boost during pressure testing, after reaching test pressure 23.52Mpa, stop pressing 10 minutes, with do not have the range estimation of leakage do not have be deformed into qualified.Then pressure is reduced to 18.8Mpa, the position, place is checked, do not have with range estimation and leak to qualified.Boost and pressure release speed should slowly carry out, the pressure testing state must not knock.
14, boiler tube hangs in the stove with after discharge, down pigtail pipe are communicated with and carries out the close test of system gas, smears suds and checks weld bond.
Workforce Planning of the present invention:
Administrative staff: 3 people breakout men: 15 people riveter: 5 people
The welder: 6 people play heavy industry, scaffolder: the 10 people worker that detects a flaw: 2 people
Maintenance electrician: 1 people driver, loop wheel machine hand: 2 people assist the worker: 8 people.
Embodiment of the present invention only is the description that preferred implementation of the present invention is carried out; be not that design of the present invention and scope are limited; under the prerequisite that does not break away from design philosophy of the present invention; engineers and technicians make technical scheme of the present invention in this area various modification and improvement all should fall into protection scope of the present invention.
Claims (3)
1. boiler tube and dissimilar steel welding procedure method is characterized in that may further comprise the steps:
1) at first adopts the special mould clamp group to weld bond, guarantee the concentricity of butt joint;
2) clear up weldment then, argon filling displacement in pipeline is successively welded pipeline, does visual examination after weld, and the underproof weld bond that carries out is reprocessed, and confirms to carry out PT, RT detection after qualified, carries out weld bond heat treatment then, and concrete operations are as follows:
With acetone groove and both sides thereof are removed totally before a, the weldering, and wrapped asbestos board, adopt little electric current, high weldering speed, string(er) bead welding in the groove both sides; The striking of welding is carried out in groove, and welding gun is supplied gas in advance during the starting the arc, and adopts high-frequency arc strike, should use current attenuation and gas shield device during the breath arc, and the welding arc crater must fill up, and during welding, the high temperature gummed tape that sticks on the groove place is with welding with opening; Every layer of postwelding removed welding slag, and answers each laminar surface defective of scrutiny, and qualified back preheating can be welded sublevel, and the joint of every layer of welding bead all should stagger, and a layer temperature control is no more than 150 ℃, whenever layer by layer between joint should stagger, should fill up arc crater when receiving arc;
The heat treatment of b, weld seam: adopt the electrical heating method furnace tubing, the oxy-acetylene heating flange, and use the thermocouple assay temperature, to 150-200 ℃, constant temperature 30 minutes evenly heats in distance weld bond 100mm before the weldering, prevent hot-spot, should be incubated near the thermal treatment zone, to reduce heat loss; Postwelding in time carries out after heat, is benchmark with the weld bond center on flange, heating in being not less than three times of weld widths, by less than 220 ℃/time the speed heating, rise to 300-350 ℃, constant temperature slowly cooled to room temperature and can untie heat tape after 1 hour;
3) carry out hardness test, through ball test, strength test again, can lift after all tests, the pass the test and put in place;
4) carry out system's air-tightness at last and detect, provide completion information and promptly finish.
2. boiler tube according to claim 1 and dissimilar steel welding procedure method is characterized in that described boiler tube is the HK400 boiler tube.
3. boiler tube according to claim 1 and dissimilar steel welding procedure method is characterized in that described dissimilar steel is the 15CrMo dissimilar steel.
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| CN201010223966.3A CN101870031B (en) | 2010-07-12 | 2010-07-12 | Construction method for welding furnace tube and dissimilar steel |
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| CN201010223966.3A CN101870031B (en) | 2010-07-12 | 2010-07-12 | Construction method for welding furnace tube and dissimilar steel |
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Cited By (10)
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| CN102873462A (en) * | 2012-10-13 | 2013-01-16 | 南通国电电站阀门有限公司 | Process for welding swing check valve and matching pipe |
| CN103567610A (en) * | 2013-10-19 | 2014-02-12 | 沈阳黎明航空发动机(集团)有限责任公司 | Fuel oil header pipe process pin oil leakage repairing method |
| CN104308336A (en) * | 2014-09-15 | 2015-01-28 | 安徽鸿路钢结构(集团)股份有限公司 | Steel welding process |
| CN108247186A (en) * | 2017-12-18 | 2018-07-06 | 无锡海核装备科技有限公司 | For the different steel weld method of pearlite heatproof steel and austenitic stainless steel |
| CN108620716A (en) * | 2018-04-26 | 2018-10-09 | 中国化学工程第七建设有限公司 | A kind of welding procedure of reburner pipeline |
| CN108644469A (en) * | 2018-05-22 | 2018-10-12 | 山西省工业设备安装集团有限公司 | The construction technology of main steam system pipeline in a kind of Steam Turbine |
| CN109963681A (en) * | 2016-10-27 | 2019-07-02 | 通用电气公司 | For manufacturing the system, method and equipment of boiler tube |
| 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 |
| CN112118932A (en) * | 2018-05-21 | 2020-12-22 | 杰富意钢铁株式会社 | Lap laser welded joint, method for manufacturing lap laser welded joint, and automobile frame member |
| CN114309884A (en) * | 2022-01-13 | 2022-04-12 | 北京城建集团有限责任公司 | Construction method for pipeline welding in winter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5456954A (en) * | 1977-10-15 | 1979-05-08 | Kubota Ltd | Manufacture of welding rod for heat resistant steel |
| JPS54121222A (en) * | 1978-03-14 | 1979-09-20 | Kubota Ltd | Heat resistant cast alloy having excellent anti- cementation property and weldability |
| JPS6224890A (en) * | 1985-07-23 | 1987-02-02 | Kobe Steel Ltd | Welding-material of similar composition |
| CN1060806A (en) * | 1991-10-03 | 1992-05-06 | 机械电子工业部郑州机械研究所 | The welding of dissimilar steel composition gradient transition |
| CN101633074A (en) * | 2009-07-16 | 2010-01-27 | 西安交通大学 | Welding method of girth weld of inner cladding thin-walled stainless steel composite tube |
-
2010
- 2010-07-12 CN CN201010223966.3A patent/CN101870031B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5456954A (en) * | 1977-10-15 | 1979-05-08 | Kubota Ltd | Manufacture of welding rod for heat resistant steel |
| JPS54121222A (en) * | 1978-03-14 | 1979-09-20 | Kubota Ltd | Heat resistant cast alloy having excellent anti- cementation property and weldability |
| JPS6224890A (en) * | 1985-07-23 | 1987-02-02 | Kobe Steel Ltd | Welding-material of similar composition |
| CN1060806A (en) * | 1991-10-03 | 1992-05-06 | 机械电子工业部郑州机械研究所 | The welding of dissimilar steel composition gradient transition |
| CN101633074A (en) * | 2009-07-16 | 2010-01-27 | 西安交通大学 | Welding method of girth weld of inner cladding thin-walled stainless steel composite tube |
Non-Patent Citations (3)
| Title |
|---|
| 李 俊: "炼油装置加热炉炉管的焊接施工与管理", 《焊接安装技术》 * |
| 汪裕林等: "9Cr-1Mo钢炉管焊接工艺的探讨", 《焊接工艺与应用》 * |
| 黄琨等: "浅谈A335 Gr.P91钢的焊接技术", 《金属加工》 * |
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| CN102873462A (en) * | 2012-10-13 | 2013-01-16 | 南通国电电站阀门有限公司 | Process for welding swing check valve and matching pipe |
| CN103567610A (en) * | 2013-10-19 | 2014-02-12 | 沈阳黎明航空发动机(集团)有限责任公司 | Fuel oil header pipe process pin oil leakage repairing method |
| CN103567610B (en) * | 2013-10-19 | 2016-12-07 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of fuel manifold technique pin leakage of oil restorative procedure |
| CN104308336A (en) * | 2014-09-15 | 2015-01-28 | 安徽鸿路钢结构(集团)股份有限公司 | Steel welding process |
| CN104308336B (en) * | 2014-09-15 | 2017-07-28 | 安徽鸿路钢结构(集团)股份有限公司 | A kind of welded steel technique |
| CN109963681A (en) * | 2016-10-27 | 2019-07-02 | 通用电气公司 | For manufacturing the system, method and equipment of boiler tube |
| CN108247186A (en) * | 2017-12-18 | 2018-07-06 | 无锡海核装备科技有限公司 | For the different steel weld method of pearlite heatproof steel and austenitic stainless steel |
| CN108620716A (en) * | 2018-04-26 | 2018-10-09 | 中国化学工程第七建设有限公司 | A kind of welding procedure of reburner pipeline |
| CN108620716B (en) * | 2018-04-26 | 2021-02-05 | 中国化学工程第七建设有限公司 | Welding process of reformer pipeline |
| CN112118932A (en) * | 2018-05-21 | 2020-12-22 | 杰富意钢铁株式会社 | Lap laser welded joint, method for manufacturing lap laser welded joint, and automobile frame member |
| CN112118932B (en) * | 2018-05-21 | 2022-08-30 | 杰富意钢铁株式会社 | Lap laser welded joint, method for manufacturing lap laser welded joint, and automobile frame member |
| US11638969B2 (en) | 2018-05-21 | 2023-05-02 | Jfe Steel Corporation | Laser-welded lap joint, method for producing laser-welded lap joint, and automobile frame component |
| CN108644469A (en) * | 2018-05-22 | 2018-10-12 | 山西省工业设备安装集团有限公司 | The construction technology of main steam system pipeline in a kind of Steam Turbine |
| 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 |
| CN114309884A (en) * | 2022-01-13 | 2022-04-12 | 北京城建集团有限责任公司 | Construction method for pipeline welding in winter |
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