I’m working on a project related to the flanges at both ends of the owner’s instrumentation, and it’s really frustrating; I need help
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In instruments of the type PCV\FE\FCV\HV\LCV, etc., the flanges used by the owner are of such a design: one side is a flanged slip-on flange, and the other side is a plate-type butt-welded flange, made of titanium Who can tell me why? Looking at this drawing makes my heart ache every time...
You can directly ask the owner whether using a flanged design is due to the need to frequently disassemble the control valve, as flanging makes assembly easier?
The use of loop flanges facilitates installation; they cannot be installed if their flanges are not aligned during welding in advance.
The cost of recycling titanium materials is also relatively high
Is it used in the chemical industry? You’d better ask the owner directly.
My principle is that as long as money is paid, it can be changed however needed: L
Do you mean: for instrument flanges (such as control valves), one side is a flanged collar type flange and the other side is a plate-type butt-welded flange?
Yes, that’s exactly what it means. Are you hesitating?
The flange structures on both sides of the control valve are different; I have never encountered such a design approach. Did the client also require this for the manual valve? Logically, a slip ring is used to save on the investment in flanges (thus titanium is not required for the flanges). In conventional design, a concession is made for the control valve flanges by allowing the use of special materials, after all, there are few components in a control valve. And the flanges of the pipes (including those that mate with the control valves) are all slip-on types, and there are a large number of them. Besides saving money, ask the owner what other *requirements (or design specifications) led to this design?