Which specification specifies that flanges for diaphragm pressure variation connections are usually DN25 or 50?
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As the title suggests: Regarding the connection method for diaphragm pressure transducers, flanges of DN25 or 50 are commonly used – which standards specify this? I searched for a long time but couldn’t find it; the SH/T 3104-2013 Standard for the Installation and Design of Petrochemical Instruments recommends DN50 and DN80:lol:lol:lol
DN50 is recommended unless the application is particularly prone to crystallization, coking, or blockage. Whether on equipment or pipes.
There is no strict requirement for this; DN50 and 80 are the recommended sizes, and EJA as well as Rose all recommend these options. The contact surface is just right; production and installation are perfect.
Are there any who chose DN15 or 20 in order to save money? If it gets clogged, it can be cleaned; but things like 2205 and 625 are much more expensive:lol