Mocked mercilessly by the warehouse staff. What type of flange is used when PJ/SE is used together with RF?
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Flange, PJ/SE, PN25, RF, 20# CS, HG/T 20592-2009 B. The warehouse staff asked me what PJ/SE meant; it refers to a flange with a loose sleeve for welding, while RF denotes a convex surface. However, the warehouse staff laughed at me, saying that a flange with a loose sleeve can’t have a convex surface, and a flange with a convex surface isn’t considered to have a loose sleeve.
RF is a convex surface, not a bulging surface; the two are different – just check the standards to see
Take the item out; if it has a convex surface (not a concave-convex one), just smash it against his face.
I’m not very familiar with this area of knowledge; even if I study it, I can also refer to the replies from above
Progress should not be seen as mockery. All RF surfaces are convex surfaces, not concave ones; concave surfaces go hand in hand with convex surfaces – one is convex and the other is concave. One is RF and the other is M
To add more, regarding the RF of PJ/SE flanges, it refers to the flanging; the sealing surface of this flanging is the same as that of the RF flange on the opposite side
Loose flange + flanging means RF (raised face)
The protrusion on this surface is not the same as the protrusion of that male/female fitting
Loose flange + flanged edge is RF (raised face)
RF is a convex surface; a convex surface is RF. The sealing surface is a small platform, not a convex one. Male/female refers to convex and concave surfaces – it can be thought of as male and female, 55555;P. It can handle high pressures