About flanges
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I would like to ask: On page 79 of HG20592-2009, for the plate flanges (Figures 9.1.1 and 9.1.2), as well as the two diagrams showing SO flanges, both versions with notches and those without notches are shown. What is the difference in their use? Why are these two versions provided? Are there any differences in the welding evaluations required for them?
I have a question: in a problem I encountered, the connections between pipes that are used frequently aren’t made with orifice flanges. So what are they then? What does a orifice plate flange look like? What are the flanges that are commonly used?
The kilogram pressure without a groove is 2.5 kg, 6 kg, or 10 kg; no specific requirement is specified for this. In normal production, grooves are used to facilitate welding
Orifice plate flanges are used to connect the measuring orifice plates; the commonly used flange connection methods include flat welding, necked flat welding, necked butt welding, and socket welding. Threaded flanges – it’s basically that simple; you’ll understand everything by reading a book from the Ministry of Chemicals