CN106352179A - Welding flange for pipe ends and machining technology thereof - Google Patents
Welding flange for pipe ends and machining technology thereof Download PDFInfo
- Publication number
- CN106352179A CN106352179A CN201611031473.3A CN201611031473A CN106352179A CN 106352179 A CN106352179 A CN 106352179A CN 201611031473 A CN201611031473 A CN 201611031473A CN 106352179 A CN106352179 A CN 106352179A
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- China
- Prior art keywords
- flange
- forging
- welding
- temperature
- outer lining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
- F16L23/026—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes by welding
-
- 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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a welding flange for pipe ends and a machining technology thereof. The welding flange comprises an installing disk and an outer lining, installing holes are evenly formed in the installing disk, an annular inner lining is arranged on the two sides of the center of the installing disk, the annular outer lining is arranged on the outer side of the inner lining, welding blocks are arranged evenly at intervals on the upper portion of the outer lining, reinforcing ribs are fixedly and evenly welded to the outer side of the outer lining, and an annular seal groove is formed in the lower surface of the installing disk. The welding flange for the pipe ends is reasonable in structural design, by the welding flange for the pipe ends and the machining technology of the welding flange, pipelines are installed and welded easily, the hardness, abrasion resistance and fatigue resistance of the flange are obviously improved, meanwhile, the service life of the flange can be substantially improved, and maintaining cost is can be lowered.
Description
Technical field
The present invention relates to a kind of welded flange is and in particular to a kind of pipe end welded flange.Meanwhile, the invention still further relates to a kind of
The processing technique of pipe end welded flange.
Background technology
Flange, and call orchid flange or bead.Flange is interconnective part between pipe and pipe, for pipe end
Between connection；Also there is the flange imported and exported used in equipment, for the connection between two equipment, such as reductor flange.Method
Blue connection is exactly two pipelines, pipe fitting or equipment, is first individually fixed on a ring flange, between two ring flanges, adds
Flange gasket, is tightened together with bolt, completes to connect.Some pipe fittings and equipment have carried ring flange, are also belonging to flange even
Connect.Flange connection is that the important connected mode flange connection of pipeline construction is easy to use, can bear larger pressure in industry
In pipeline, flange connect using quite varied.Connect species according to connected mode flange can be divided into: slip-on-welding plate flange, band
Neck slip-on welding flange, band neck W.N flange, socket welding flange, screwed flange, blind flange, band neck welding neck collar loose flange, weldingon collar
Loose flange, ring groove flange and blind flange, major diameter flat flange, major diameter hubbed flange, spectactle blind, welding neck collar pine set
Flange etc..
But, in the installation process of pipe end welded flange, need, to pipeline and flange Dock With Precision Position, just can carry out afterwards
Welding, in welding, is only provided with a lap welding position in junction, does not have longitudinal welding position, and Traditional paint spray flange preservative treatment effect
Really bad, it is vulnerable to corrosion, reduces useful life, increase maintenance cost.
Content of the invention
It is an object of the invention to provide a kind of pipe end welded flange and its processing technique, to solve in above-mentioned background technology
The problem proposing.
For achieving the above object, the present invention provides a kind of following technical scheme: pipe end welded flange, including mounting disc with outward
Lining, described mounting disc is evenly arranged with installing hole, the both sides of described installation disk center are provided with ring lining, outside described liner
It is provided with annular outer liner, above described outer lining, uniformly interruption is provided with welding block, and outside described outer lining, uniform welding is fixed with ribs,
Described mounting disc lower surface is provided with annular seal groove.
Preferably, described mounting disc, welding block, liner and outer lining are integrated.
Preferably, described welding block top outer edge is provided with and is easy to the domatic of welding.
Preferably, described liner inwall is provided with the oblique cut for reducing fluid impact.
Preferably, the described mounting disc of installing hole both sides and the bottom welding of ribs are fixed, and the back of ribs is same
When be welded in outside welding block and outer lining.
Present invention also offers a kind of production technology of pipe end welded flange, specifically include following steps:
S1, raw material prepare and process: select round steel or square steel to be raw material, derusted and decontamination processing in raw material surface, will
The raw material handled well is blocked, and obtains flange stock, stock is put in the heating furnace that temperature is 1400 DEG C and is heated, obtain
To high temperature stock, standby；
S2, forging molding: the high temperature obtaining in s1 stock is taken out, takes the mode of open die forging, high temperature stock is carried out
Forging and stamping, forging initial forging temperature is 1300-1350 DEG C, and final forging temperature is 700-800 DEG C, and so that the generation deformation of high temperature stock is obtained just
The forging of general laws orchid blank；
S3, thermal process are processed: the forging obtaining in s2 is put into heating furnace and carries out thermal process process, thermal process is just processed as
Fire, normalizing temperature is 850-900 DEG C, and temperature retention time is 150min, interior during insulation, carries out dry cyaniding to forging simultaneously
Process, dry cyaniding process time is 120min, tapping temperature is 830 DEG C, is often cooled under field conditions (factors) after taking-up
Temperature；
S4, lathe process: the room temperature forging after s3 is processed carries out roughing first, remove the oxide skin on forging surface,
Afterwards polish is carried out to the forging of scale removal, car goes out installing hole, welding block, liner, outer lining, seal groove and pipeline card
Groove；
S5, surface treatment are processed: the flange after polish in s4 is carried out sanding burr, after obtaining smooth flange,
Steel seal is added on flange excircle post surface, passes through electric arc spraying afterwards and adds corrosion-inhibiting coating to flange surface, and thickness is 0.25-
0.40mm；
S6, warehouse-in: after the flange obtaining in s5 finished product is cooled down, packed with hermetic bag, place in warehouse and store.
Preferably, the anti-corrosion material that in s5, electric arc spraying adopts when processing is aluminium wire and zinc silk, and spelter coating invests flange table
Face, aluminized coating invests spelter coating surface.
Preferably, described spelter coating thickness is 0.1-0.15mm, and described aluminized coating thickness is 0.15-0.25mm.
A kind of pipe end welded flange and its processing technique that the present invention provides, compared with prior art, by liner with outward
The design of lining, so that forming a circulating line draw-in groove being used for clamping pipeline between liner and outer lining, is conducive to Pipe installing
When be accurately positioned, and support to providing inside and outside pipeline, be conducive to firm pipeline, above outer lining, be provided with the welding outputing groove
Block, it is possible to provide more vertical and horizontal welding positions；Compared with traditional thermal process, in thermal process normalized treatment, using high temperature, right
Forging carries out carbo-nitriding process simultaneously, can substantially carry hardness, wearability and the fatigue strength of forging；Prevented using electric arc spraying
Rotten process, compare traditional anti-corrosion measure, by the metallic zinc of flange surface spraying atomization and aluminum, the composite coating of formation, its
Corrosion resistance 50-130% higher than the independent corrosion-resistant life value sum of both spray zinc or aluminized coating, flange improves after coming into operation again to be made
With the time limit, reduce and change, be easy to pipe-line maintenance；This pipe end welded flange and its processing technique, reasonable in design, are easy to pipeline
Install and weld, the hardness of flange, wearability and fatigue resistance are improved significantly, and can increase substantially making of flange simultaneously
With the life-span, reduce maintenance cost.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the sectional view of the present invention.
In figure: 1 mounting disc, 2 installing holes, 3 ribs, 4 welding blocks, 5 liners, 6 outer linings, 7 seal grooves, 8 pipeline draw-in grooves.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Embodiment 1
The invention provides a kind of pipe end welded flange as shown in Figure 1-2, including mounting disc 1 and outer lining 6, described installation
Installing hole 2 is evenly arranged with disk 1, the both sides at described mounting disc 1 center are provided with ring lining 5, and described liner 5 inwall is provided with use
In the oblique cut reducing fluid impact, outside described liner 5, it is provided with annular outer liner 6, uniformly interruption is provided with for described outer lining 6 top
Welding block 4, described welding block 4 top outer edge is provided with and is easy to the domatic of welding, and described outer lining 6 outside uniform welding is fixed with
Ribs 3, the described mounting disc 1 of installing hole 2 both sides and the bottom welding of ribs 3 are fixed, and the back of ribs 3 is welded simultaneously
It is connected to outside welding block 4 and outer lining 6.
Present invention also offers a kind of production technology of pipe end welded flange, specifically include following steps:
S1, raw material prepare and process: select steel, with round steel or square steel as raw material, is derusted in raw material surface and go
Dirty process, the raw material handled well is blocked, is obtained flange stock, stock is put in the heating furnace that temperature is 1400 DEG C
Row heating, obtains high temperature stock, standby；
S2, forging molding: the high temperature obtaining in step s1 stock is taken out, takes the mode of open die forging, to high temperature stock
Forged and pressed, forging initial forging temperature is 1300-1350 DEG C, and final forging temperature is 700-800 DEG C, and make high temperature stock produce deformation and obtained
Forging to first general laws orchid blank；
S3, thermal process are processed: the forging obtaining in step s2 is put into heating furnace and carries out thermal process process, thermal process is processed
For normalizing, normalizing temperature is 850-900 DEG C, and temperature retention time is 150min, interior during insulation, carries out gaseous carbon nitrogen to forging simultaneously
Permeation is processed, and dry cyaniding process time is 150min, and tapping temperature is 830 DEG C, cools down under field conditions (factors) after taking-up
To room temperature；
S4, lathe process: the room temperature forging after step s3 is processed carries out roughing first, remove the oxidation on forging surface
Skin, carries out polish to the forging of scale removal afterwards, and car goes out installing hole 2, welding block 4, liner 5, outer lining 6, seal groove 7 and
Pipeline draw-in groove 8；
S5, surface treatment are processed: the flange after polish in step s4 is carried out sanding burr, obtains smooth flange
Afterwards, add steel seal on flange excircle post surface, pass through electric arc spraying afterwards and add corrosion-inhibiting coating to flange surface, thickness is
0.25-0.40mm, the anti-corrosion material that electric arc spraying adopts when processing is aluminium wire and zinc silk, using arc-melting metal, with a high speed
Air-flow is atomized molten metal, and the metallic of atomization is accelerated make them spray to workpiece formation coating, and spelter coating invests
Flange surface, aluminized coating invests spelter coating surface, and described spelter coating thickness is 0.1-0.15mm, and described aluminized coating thickness is
0.15-0.25mm；
S6, warehouse-in: after the flange obtaining in step s5 finished product is cooled down, packed with hermetic bag, place in warehouse and store.
Embodiment 2
The invention provides a kind of pipe end welded flange as shown in Figure 1-2, including mounting disc 1 and outer lining 6, described installation
Installing hole 2 is evenly arranged with disk 1, the both sides at described mounting disc 1 center are provided with ring lining 5, and described liner 5 inwall is provided with use
In the oblique cut reducing fluid impact, outside described liner 5, it is provided with annular outer liner 6, uniformly interruption is provided with for described outer lining 6 top
Welding block 4, described welding block 4 top outer edge is provided with and is easy to the domatic of welding, and described outer lining 6 outside uniform welding is fixed with
Ribs 3, the described mounting disc 1 of installing hole 2 both sides and the bottom welding of ribs 3 are fixed, and the back of ribs 3 is welded simultaneously
It is connected to outside welding block 4 and outer lining 6.
Present invention also offers a kind of production technology of pipe end welded flange, specifically include following steps:
S1, raw material prepare and process: select steel, with round steel or square steel as raw material, is derusted and decontamination in raw material surface
Process, the raw material handled well is blocked, obtains flange stock, stock is put in the heating furnace that temperature is 1350 DEG C and carries out
Heating, obtains high temperature stock, standby；
S2, forging molding: the high temperature obtaining in s1 stock is taken out, takes the mode of open die forging, high temperature stock is carried out
Forging and stamping, forging initial forging temperature is 1250-1300 DEG C, and final forging temperature is 650-750 DEG C, and so that the generation deformation of high temperature stock is obtained just
The forging of general laws orchid blank；
S3, thermal process are processed: the forging obtaining in s2 is put into heating furnace and carries out thermal process process, thermal process is just processed as
Fire, normalizing temperature is 800-850 DEG C, and temperature retention time is 180min, interior during insulation, carries out dry cyaniding to forging simultaneously
Process, dry cyaniding process time is 180min, tapping temperature is 800 DEG C, is often cooled under field conditions (factors) after taking-up
Temperature；
S4, lathe process: the room temperature forging after s3 is processed carries out roughing first, remove the oxide skin on forging surface,
Afterwards polish is carried out to the forging of scale removal, car goes out installing hole 2, welding block 4, liner 5, outer lining 6, seal groove 7 and pipe
Road draw-in groove 8；
S5, surface treatment are processed: the flange after polish in s4 is carried out sanding burr, after obtaining smooth flange,
Steel seal is added on flange excircle post surface, passes through electric arc spraying afterwards and adds corrosion-inhibiting coating to flange surface, and thickness is 0.25-
0.40mm, the anti-corrosion material that electric arc spraying adopts when processing is aluminium wire and zinc silk, using arc-melting metal, uses high velocity air handle
Molten metal is atomized, and the metallic of atomization is accelerated make them spray to workpiece formation coating, and spelter coating invests flange table
Face, aluminized coating invests spelter coating surface, and described spelter coating thickness is 0.1-0.15mm, and described aluminized coating thickness is 0.15-
0.25mm；
S6, warehouse-in: after the flange obtaining in step s5 finished product is cooled down, packed with hermetic bag, place in warehouse and store.
Embodiment 3
The invention provides a kind of pipe end welded flange as shown in Figure 1-2, including mounting disc 1 and outer lining 6, described installation
Installing hole 2 is evenly arranged with disk 1, the both sides at described mounting disc 1 center are provided with ring lining 5, and described liner 5 inwall is provided with use
In the oblique cut reducing fluid impact, outside described liner 5, it is provided with annular outer liner 6, uniformly interruption is provided with for described outer lining 6 top
Welding block 4, described welding block 4 top outer edge is provided with and is easy to the domatic of welding, and described outer lining 6 outside uniform welding is fixed with
Ribs 3, the described mounting disc 1 of installing hole 2 both sides and the bottom welding of ribs 3 are fixed, and the back of ribs 3 is welded simultaneously
It is connected to outside welding block 4 and outer lining 6.
Present invention also offers a kind of production technology of pipe end welded flange, specifically include following steps:
S1, raw material prepare and process: select steel, with round steel or square steel as raw material, is derusted in raw material surface and go
Dirty process, the raw material handled well is blocked, is obtained flange stock, stock is put in the heating furnace that temperature is 1450 DEG C
Row heating, obtains high temperature stock, standby；
S2, forging molding: the high temperature obtaining in s1 stock is taken out, takes the mode of open die forging, high temperature stock is carried out
Forging and stamping, forging initial forging temperature is 1350-1400 DEG C, and final forging temperature is 750-850 DEG C, and so that the generation deformation of high temperature stock is obtained just
The forging of general laws orchid blank；
S3, thermal process are processed: the forging obtaining in s2 is put into heating furnace and carries out thermal process process, thermal process is just processed as
Fire, normalizing temperature is 900-950 DEG C, and temperature retention time is 120min, interior during insulation, carries out dry cyaniding to forging simultaneously
Process, dry cyaniding process time is 120min, tapping temperature is 850 DEG C, is often cooled under field conditions (factors) after taking-up
Temperature；
S4, lathe process: the room temperature forging after s3 is processed carries out roughing first, remove the oxide skin on forging surface,
Afterwards polish is carried out to the forging of scale removal, car goes out installing hole 2, welding block 4, liner 5, outer lining 6, seal groove 7 and pipe
Road draw-in groove 8；
S5, surface treatment are processed: the flange after polish in s4 is carried out sanding burr, after obtaining smooth flange,
Steel seal is added on flange excircle post surface, passes through electric arc spraying afterwards and adds corrosion-inhibiting coating to flange surface, and thickness is 0.25-
0.40mm, the anti-corrosion material that electric arc spraying adopts when processing is aluminium wire and zinc silk, using arc-melting metal, uses high velocity air handle
Molten metal is atomized, and the metallic of atomization is accelerated make them spray to workpiece formation coating, and spelter coating invests flange table
Face, aluminized coating invests spelter coating surface, and described spelter coating thickness is 0.1-0.15mm, and described aluminized coating thickness is 0.15-
0.25mm；
S6, warehouse-in: after the flange obtaining in s5 finished product is cooled down, packed with hermetic bag, place in warehouse and store.
Table 1 depth of penetration and relation table action time
Table 2 depth of penetration and operative temperature relation table
In sum, compared with prior art, the invention has the advantage that by the design of liner and outer lining so that liner
Form a circulating line draw-in groove being used for clamping pipeline and outer lining between, be conducive to being accurately positioned during Pipe installing, and to pipe
There is provided inside and outside road and support, be conducive to firm pipeline, be provided with the welding block outputing groove above outer lining, it is possible to provide more longitudinal directions
With horizontal welding position；Compared with traditional thermal process, in thermal process normalized treatment, using high temperature, carbon nitrogen is carried out simultaneously to forging
Permeation is processed, and can substantially carry hardness, wearability and the fatigue strength of forging；Using electric arc spraying preservative treatment, compare tradition
Anti-corrosion measure, by spraying metallic zinc and the aluminum of atomization, the composite coating of formation in flange surface, its corrosion resistance is than spray zinc or aluminum
Individually corrosion-resistant life value sum will exceed 50～130% to both coatings, and flange improves useful life after coming into operation again, reduces more
Change, be easy to pipe-line maintenance；This pipe end welded flange and its processing technique, have reasonable in design, are easy to Pipe installing and weldering
Connect, the hardness of flange, wearability and fatigue resistance, be improved significantly, the service life of flange can be increased substantially simultaneously,
Reduce maintenance cost.
Finally it is noted that the foregoing is only the preferred embodiments of the present invention, it is not limited to the present invention,
Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to wherein some technical characteristics,
All any modification, equivalent substitution and improvement within the spirit and principles in the present invention, made etc., should be included in the present invention's
Within protection domain.
Claims (8)
1. a kind of pipe end welded flange, including mounting disc (1) and outer lining (6) it is characterised in that: described mounting disc (1) is upper uniformly
It is provided with installing hole (2), the both sides at described mounting disc (1) center are provided with ring lining (5), are provided with ring outside described liner (5)
Shape outer lining (6), above described outer lining (6), uniformly interruption is provided with welding block (4), and outside described outer lining (6), uniform welding is fixed with
Ribs (3), described mounting disc (1) lower surface is provided with annular seal groove (7).
2. a kind of pipe end welded flange according to claim 1 it is characterised in that: described mounting disc (1), welding block (4),
Liner (5) and outer lining (6) are integrated.
3. a kind of pipe end welded flange according to claim 1 it is characterised in that: described welding block (4) top outer side
Edge is provided with and is easy to the domatic of welding.
4. a kind of pipe end welded flange according to claim 1 it is characterised in that: described liner (5) inwall be provided with for
Reduce the oblique cut of fluid impact.
5. a kind of pipe end welded flange according to claim 1 it is characterised in that: the installation of described installing hole (2) both sides
The bottom welding of disk (1) and ribs (3) is fixed, and the back of ribs (3) is welded in welding block (4) and outer lining (6) simultaneously
Outside.
6. the pipe end welded flange described in a kind of claim 1 processing technique it is characterised in that: specifically include following steps:
S1, raw material prepare and process: select steel, steel surface is derusted and decontamination processing, the raw material handled well is carried out
Block, obtain flange stock, stock is put in the heating furnace that temperature is 1400 DEG C and is heated, obtain high temperature stock, standby；
S2, forging molding: the high temperature obtaining in s1 stock is taken out, takes the mode of open die forging, high temperature stock is forged and pressed,
Forging initial forging temperature is 1300-1350 DEG C, and final forging temperature is 700-800 DEG C, and makes the generation deformation of high temperature stock obtain just general laws
The forging of blue blank；
S3, thermal process are processed: the forging obtaining in s2 put into heating furnace and carry out thermal process process, thermal process is processed as normalizing,
Normalizing temperature is 850-900 DEG C, and temperature retention time is 150min, interior during insulation, forging is carried out at dry cyaniding simultaneously
Reason, dry cyaniding process time is 120min, and tapping temperature is 830 DEG C, is cooled to room temperature after taking-up under field conditions (factors)；
S4, lathe process: the room temperature forging after processing in s3 is carried out roughing first, removes the oxide skin on forging surface, it
Afterwards polish is carried out to the forging of scale removal, car goes out installing hole (2), welding block (4), liner (5), outer lining (6), seal groove
And pipeline draw-in groove (8) (7)；
S5, surface treatment are processed: the flange after polish in s4 is carried out sanding burr, after obtaining smooth flange, in flange
Outer cylinder surface adds steel seal, passes through electric arc spraying afterwards and adds corrosion-inhibiting coating to flange surface, and thickness is 0.25-0.40mm；
S6, warehouse-in: after the flange obtaining in s5 finished product is cooled down, packed with hermetic bag, place in warehouse and store.
7. a kind of pipe end welded flange according to claim 6 processing technique it is characterised in that: at electric arc spraying in s5
The anti-corrosion material adopting during reason is aluminium wire and zinc silk, and spelter coating invests flange surface, and aluminized coating invests spelter coating surface.
8. a kind of pipe end welded flange according to claim 7 processing technique it is characterised in that: described spelter coating thickness
For 0.1-0.15mm, described aluminized coating thickness is 0.15-0.25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611031473.3A CN106352179A (en) | 2016-11-18 | 2016-11-18 | Welding flange for pipe ends and machining technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611031473.3A CN106352179A (en) | 2016-11-18 | 2016-11-18 | Welding flange for pipe ends and machining technology thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106352179A true CN106352179A (en) | 2017-01-25 |
Family
ID=57861562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611031473.3A Pending CN106352179A (en) | 2016-11-18 | 2016-11-18 | Welding flange for pipe ends and machining technology thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106352179A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714961A (en) * | 2019-11-15 | 2020-01-21 | 中国人民解放军陆军工程大学 | Prestressed FRP pipe and connecting method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4648163A (en) * | 1984-08-24 | 1987-03-10 | Aisin Seiki Kabushiki Kaisha | Method of making a poly-V ribbed pulley |
| CN203052031U (en) * | 2012-12-20 | 2013-07-10 | 常熟市保得利电力通讯设备有限公司 | Hot galvanizing hubbed flange |
| CN104633333A (en) * | 2013-11-10 | 2015-05-20 | 无锡新奇特钣金机械有限公司 | Pipeline structure |
| CN104633332A (en) * | 2013-11-10 | 2015-05-20 | 无锡新奇特钣金机械有限公司 | Pipeline structure with flanges |
| CN104862615A (en) * | 2015-03-31 | 2015-08-26 | 无锡市华尔泰机械制造有限公司 | S31803 duplex stainless steel flange and production process thereof |
-
2016
- 2016-11-18 CN CN201611031473.3A patent/CN106352179A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4648163A (en) * | 1984-08-24 | 1987-03-10 | Aisin Seiki Kabushiki Kaisha | Method of making a poly-V ribbed pulley |
| CN203052031U (en) * | 2012-12-20 | 2013-07-10 | 常熟市保得利电力通讯设备有限公司 | Hot galvanizing hubbed flange |
| CN104633333A (en) * | 2013-11-10 | 2015-05-20 | 无锡新奇特钣金机械有限公司 | Pipeline structure |
| CN104633332A (en) * | 2013-11-10 | 2015-05-20 | 无锡新奇特钣金机械有限公司 | Pipeline structure with flanges |
| CN104862615A (en) * | 2015-03-31 | 2015-08-26 | 无锡市华尔泰机械制造有限公司 | S31803 duplex stainless steel flange and production process thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714961A (en) * | 2019-11-15 | 2020-01-21 | 中国人民解放军陆军工程大学 | Prestressed FRP pipe and connecting method |
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Application publication date: 20170125 |