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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

Different connection modes of flange elbow

Flanges, or flanges, are symmetrical disk-like structures used to connect pipes or fixed shaft mechanical parts. They are usually fixed with bolts and threads. Including flange and stainless steel flange elbow, give you a brief introduction to the flange and pipe connection of several ways. The f... Read More

The processing of stainless steel flange needs to understand and pay attention to some problems

1, weld defects: stainless steel flange weld defects are more serious, if it is to use manual mechanical grinding treatment method to make up, then the grinding marks, resulting in uneven surface, will affect the appearance; 2, polishing and polishing passivation is not uniform: pickling passivat... Read More

Forgings of pickling and blast cleaning

Forgings are widely used in industry, such as aircraft, automobile and so on. Of course, forgings are also to be cleaned, the following is mainly to tell you about the knowledge of pickling and shot blasting forgings. Pickling and cleaning of forgings: Removal of metal oxides by chemical reaction... Read More

What is the difference between welded flanges, flat welded flanges and socket welded flanges?

In HG, butt-welded flanges, flat-welded flanges and socket welded flanges have different standards. Applicable occasions are different, in addition, butt-welding flange is the pipe diameter and wall thickness of the interface end and the same as the pipe to be welded, and the two pipes are welded... Read More
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