Experts, are the sealing surfaces on the equipment of ammonia storage tanks concave or convex?
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The sealing of liquid ammonia equipment generally uses male-female connections, but are the sealing surfaces on ammonia equipment male or female? Is the sealing surface on the ammonia valve concave or convex?
In principle, all the recessed surfaces that are taken over should face upward. It is unreasonable to configure the nozzle flanges on the top or sides of the container as convex, as this configuration makes the sealing surfaces prone to damage. The pipe opening at the bottom of the container should be designed with a convex shape, which facilitates the installation and replacement of gaskets. However, the sealing surface of the pipe flange connected to the valve should match the valve.
Convex-concave sealing surfaces are used, and the flanges of the valve body are all concave flanges
The fixed-volume gauge only specifies requirements for the flange type of liquid ammonia equipment, as well as the material of the studs and gaskets; a raised sealing surface is also acceptable. Of course, ammonia valve flanges are mostly of the concave type (depending on the pressure rating)
Most equipment flanges are concave
All valves are concave, unless otherwise specified.
Manholes and access holes have flanged concave surfaces. Protect the sealing surface
Convex-concave sealing surfaces are used; the flanges on the valve body are all of the concave type. Reciprocating spray machine, UV curing machine, right-brain development franchise, UVLED surface light source, UV curing machine
There are no absolute rules. As long as it can match the pipes and valves, that’s fine.
Under normal circumstances, the concave side is on top; the valve also usually has a concave surface