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Home
Company
Products
Flanges
Weld Neck Forged Flanges
Threaded Forged Flanges
Lap Joint Forged Flange
Socket Weld Forged Flange
Slip On Forged Flange
Blind Forged Flange
Long Weld Neck Forged Flange
Orifice Forged Flanges
Spectacle Forged Flanges
Loose Forged Flange
Plate Flange
Oval Forged Flange (DIN )
Wind Power Flange
ForgedTube Sheet
CUSTOM Forged Flange
Forgings
Forged Bars
Forged Blocks
Forged Discs
Forged Rings
Forged Shafts
Forged Cylinders
Forged Tubes
CUSTOM Forgings
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The sealing method of hydraulic cylinder forging
The reason why the hydraulic cylinder forgings need to be sealed is because of the existence of internal leakage and external leakage. When there is internal leakage and external leakage in the hydraulic cylinder, it will lead to the volume of the hydraulic cylinder's cavity and the efficiency wi...
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What forging technology does the flange factory have?
Flange factory is a production enterprise producing flanges. Flanges are parts connected between pipes, which are used for the connection between pipe ends. It is also useful for the flange on the inlet and outlet of the equipment for the connection between two devices. The production technology ...
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How to forge stainless steel forgings?
The precision of rough or stainless steel forgings is higher. The application of advanced technology and equipment can achieve little or no cutting. The metal materials used in forging should have good plasticity, so that under the action of external force, plastic deformation can be produced wit...
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The sealing principle and characteristics of flange
Sealing of flat-welded flanges has always been a hot issue related to the production cost or economic benefit of enterprises. However, the main design disadvantage of flat-welded flanges is that they are not leakproof. This is a design flaw: the connection is dynamic, and periodic loads, such as ...
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What should be noted in the examination of die forgings before heat treatment?
The inspection before solution heat treatment is a pre-inspection procedure to check the finished product's surface quality and dimensions according to the technical conditions, die forging drawing and process card after the forging forming process is finished. Specific inspection should pay atte...
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Congratulations on Resumption of Work
Congratulations on Resumption of Work Dear new and old customers and friends, Happy New Year. After a happy Spring Festival holiday, Lihuang Group (DHDZ)started normal work on February 18th. All the work has been well organized and carried out as usual.
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DHDZ forging 2020 year-end review meeting and 2021 welcome party for freshmen
2020 is an extraordinary year, the outbreak of the epidemic, the whole country is difficult, big state organs and some enterprises, small to every employee and ordinary people, all bear a huge test. At 15:00 on January 29, 2021, DHDZ forging organized the 2020 annual year-end summary meeting and...
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How to find the processing difficulties of stainless steel flange
First of all, before choosing the drill bit, take a look at the difficulties in stainless steel flange processing. Find out the difficulty can be very accurate, very fast to find the use of the drill. What are the difficulties in stainless steel flange processing? Sticky knife: stainless steel pr...
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What is the process of forging?
1. Isothermal forging is to keep the temperature of billet constant during the whole forming process. Isothermal forging is used to take advantage of the high plasticity of certain metals at constant temperature or to obtain specific structures and properties. Isothermal forging requires the mold...
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The main disadvantages of water as a quenching cooling medium for forgings ?
1) in the austenite isothermal transformation diagram of the typical area, that is, about 500-600℃, water in the steam film stage, the cooling rate is not fast enough, often cause uneven cooling and insufficient cooling speed forgings and the formation of the "soft point".In the martensite transf...
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What kind of bolt connection does stainless steel flange use?
Customers often ask: stainless steel flange connection whether to choose stainless steel bolts? Now I will write what I have learned to share with you: Material has nothing to do with the material of flange bolts, according to the European system HG20613-97 "steel pipe flange with fasteners (the...
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How to use welding flange correctly
Flanges With the rapid development of domestic foreign minister pipeline construction, pipeline pressure test has become an essential important link, before and after the pressure test, must pass the ball sweep line for each section of the pipeline, the number of times is generally 4~5. Especiall...
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