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  • Is there a requirement for hardness of shaft forgings?

    Is there a requirement for hardness of shaft forgings?

    Surface hardness and uniformity of shaft forgings are the main items of technical requirements and routine inspection. The hardness of the body shows the wear resistance, etc., in production, the r...
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  • What are the quality checks for forgings?

    What are the quality checks for forgings?

    In order to ensure the quality of forgings to meet the requirements of design and use of the indicators, it is necessary to forgings (blank, semi-finished products and finished products) quality in...
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  • Details to note when using threaded flanges

    Details to note when using threaded flanges

    Threaded flange refers to a flange connected by thread and pipe. During design, it can be handled according to loose flange. The advantage is that no welding is required, and the additional torque ...
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  • Why do you choose 304 butt welded stainless steel flanges

    Why do you choose 304 butt welded stainless steel flanges

    Let's start with a fact: Austenitic stainless steel pipes are commonly used in a variety of corrosive environments. However, if you are careful, you will find that in the design documents of some u...
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  • How to identify the quality of forging

    How to identify the quality of forging

    The main task of forgings quality inspection and quality analysis is to identify the quality of forgings, analyze the causes of forgings defects and preventive measures, analysis and research It is...
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  • Three methods of carbon steel flange sealing

    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 surfa...
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  • Do you know the four fires of heat treatment in forging technology?

    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...
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  • Factors affecting oxidation of forgings

    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 temp...
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  • Methods for inspection of large forgings

    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 ...
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  • Injection molding of stainless steel flanges

    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. G...
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  • What’s different killed steel and Rimmed steel!!!

    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...
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  • How is the flange welded?

    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...
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