Industry News
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Three methods of carbon steel flange sealing
There are three types of carbon steel flange sealing surface, which are: 1, tenon sealing surface: suitable for flammable, explosive, toxic media and high pressure occasions. 2, plane sealing surface: suitable for pressure is not high, non-toxic medium occasions. 3, concave and convex sealing sur...Read more -
Do you know the four fires of heat treatment in forging technology?
Forgings in the forging process, heat treatment is the most important link, heat treatment roughly annealing, normalizing, quenching and tempering four basic processes, commonly known as metal heat treatment of the "four fire". one, metal heat treatment of the fire - annealing: 1, annealing is t...Read more -
Factors affecting oxidation of forgings
The oxidation of forgings is mainly affected by the chemical composition of the heated metal and the internal and external factors of the heating ring (such as furnace gas composition, heating temperature, etc.). 1) Chemical composition of metal materials The amount of oxide scale formed is close...Read more -
Methods for inspection of large forgings
Due to the high cost of raw materials for large forgings, as well as the production process, if defects occur, they will affect the follow-up processing or poor processing quality, and some affect the performance and use of forgings strictly, even reducing the service life of the finished parts, ...Read more -
Injection molding of stainless steel flanges
Stainless steel flanged ball valve, globe valve, gate valve when used, only for fully open or closed, do not allow to do flow regulation, so as to avoid sealing surface erosion, accelerated wear. Gate valves and upper screw globe valves have reverse sealing device, hand wheel to the top to the us...Read more -
What’s different killed steel and Rimmed steel!!!
Killed steel is steel that has been completely deoxidized by the addition of an agent before casting such that there is practically no evolution of gas during solidification. It is characterized by a high degree of chemical homogeneity and freedom from gas porosities. Semi-killed steel i...Read more -
How is the flange welded?
1. Flat welding: only welding the outer layer, without welding the inner layer; Generally used in medium and low pressure pipelines, the nominal pressure of the pipeline is less than 0.25mpa. There are three kinds of sealing surface of flat welding flange, which are smooth type, concave and conve...Read more -
There are problems in the processing of stainless steel forgings
Weld defects: weld defects are serious, manual mechanical grinding processing method is used to compensate, resulting in grinding marks, resulting in uneven surface, affect the appearance. Inconsistent surface: only pickling and passivation of the weld will cause uneven surface and affect the app...Read more -
The reason of sliding or crawling of hydraulic cylinder piston and the treatment method
Hydraulic cylinder piston sliding or crawling will make the hydraulic cylinder work instability. Do you know the reason for it? Do you know what to do with it? The following article is mainly for you to talk about. (1) hydraulic cylinder internal astringency. Improper assembly of the internal par...Read more -
Flange features and use attention
Flanges are disk-shaped parts most commonly used in piping. Flanges are used in pairs and with matching flanges on valves. In pipeline engineering, flanges are mainly used for the connection of pipelines. In the need to connect the pipeline, all kinds of installation of a flange, low pressure pip...Read more -
How to improve the production efficiency of forging heat treatment
【DHDZ】As we all know, heat treatment is an important link in the forging process, related to the hardness of forgings and other problems, so how to improve the production efficiency of heat treatment forgings? Improve the efficiency of heat treatment production, by increasing the furnace charg...Read more -
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...Read more
