How to choose and use flange standard

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For the selection and use of flange standard, there are two types of flange standards used in petroleum and chemical industries. One is the high-pressure vessel flange standard, and the other is the pipe flange standard.

Both flat welding and butt welding flanges have two types: with and without lining ring. The nominal diameter of the high-pressure vessel flange and the nominal diameter of the high-pressure vessel take the same series of product values.

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