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  • Production management technology: incoming material inspection

    Production management technology: incoming material inspection

    IQC (incoming quality control) is the first level to control the quality of enterprise products before production. If the unqualified products are put into the process, it will lead to the disqualification of the process or the final products, resulting in huge losses. IQC not only affects the ...

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  • How to do if the corner valve tap is broken in the wall

    How to do if the corner valve tap is broken in the wall

    Recently, my friend encountered a problem: when I changed the faucet, I accidentally broke the faucet in the wall, and there was no water. I tried several methods, but it didn’t work, and finally it was fixed. This kind of thing is quite common, many people must have experienced it, so how t ...

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  • Classification, function and selection principle of probes used in ultrasonic flaw detection

    Classification, function and selection principle of probes used in ultrasonic flaw detection

    With the continuous emergence of new technology and the continuous updating of testing equipment, ultrasonic testing technology is one of the fastest developing and most widely used methods in nondestructive testing technology, which plays a very important role in nondestructive testing technology. ...

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  • Analysis and improvement of flange leakage in high pressure ball valve

    Analysis and improvement of flange leakage in high pressure ball valve

    Aiming at the middle flange leakage problem of high pressure three piece ball valve in the process of manufacture and use, this paper analyzes and discusses the structure characteristics, test method and field use of the valve, and puts forward the solutions. In the hydrotreating process o ...

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  • Technology of connecting tube and tube sheet in shell and tube heat exchanger

    Technology of connecting tube and tube sheet in shell and tube heat exchanger

    What is a heat exchanger? Heat exchanger is a kind of heat transfer equipment which transfers part of heat from hot fluid to cold fluid. It is widely used in people’s daily life, petroleum, chemical, power, medicine, atomic energy and nuclear industry. It can be used as independent equip ...

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  • When do bolts need washers

    When do bolts need washers

    When do bolts need washers? In mechanical equipment, we often see that some bolted connections use washers, some bolted connections do not use washers, some bolted connections use flat washers, some use spring washers, so do you want to use washers in the design? Bolt connection with flat was ...

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  • How does crude oil turn into oil and chemicals

    How does crude oil turn into oil and chemicals

    How does crude oil turn into oil and chemicals? Why do different processes produce different products from the same raw materials? Let’s take a look at the specific processes of oil refining and olefin production. There are detailed explanations on raw materials, products and production pro ...

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  • Inventory of current domestic and international standards for additive manufacturing

    Inventory of current domestic and international standards for additive manufacturing

    In recent years, many additive manufacturing standards have been released one after another, covering a wide range from design guidelines to materials, processes, equipment, testing and qualification certification of employees. In fact, many standards are still in the exploratory stage at present. ...

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  • Monel alloy for corrosion resistant valve

    Monel alloy for corrosion resistant valve

    The current American technical standards of Monel alloy include ASTM, SAE, AMS, MII, ANSI, ASME. For Monel alloy of the same brand, different technical specification systems are adopted, not only the expression method of the brand is different, but also the code and content of the specification are ...

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  • Inspection requirements for hardened zone of induction hardening parts

    Inspection requirements for hardened zone of induction hardening parts

    At present, induction hardening has been widely used in the production of automobile parts to improve the strength and increase the surface hardness. In order to confirm that the quenching quality of induction hardening parts meets the technical requirements specified in the drawing, the ...

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  • Common surface defects of wire rod and steel bar and treatment methods

    Common surface defects of wire rod and steel bar and treatment methods

    Common surface defects of wire rod and steel bar 1.1 defects of raw materials 1.1.1 shrinkage cavity – residual shrinkage cavity in steel and the resulting defects. Causes: (1) shrinkage during pouring. (2) there are oxides and slag. 1.1.2 lamination — defect of wire rod longit ...

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  • What is babbitt metal

    What is babbitt metal

    What is babbitt metal? Babbitt metal is a tin based and lead based bearing alloy with antifriction properties, which was invented by Babbitt. Because of its white, also known as white alloy. The main composition of babbitt alloy is tin, lead, antimony and copper. Antimony and copper are used t ...

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