A newbie asks a question about flanges
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In the title bar, under the name column, it is indicated as Flange WN20-5.0 RF Sch160. What does \"WN20-5.0 RF Sch160\" mean here?
WN refers to a butt-welded flange; 20 denotes the nominal diameter; 5.0 represents 5 MPa; RF indicates that the sealing surface type is raised face; SCH160 refers to the wall thickness. This post was last edited by Douding on 2007-12-13 at 21:19.]
It should be a high-neck welded flange that meets American standards or corresponds to HG20616 of the American system; it is a raised-face welded flange with a nominal diameter of 20 and a nominal pressure of 5.0 MPa (not 5 KG), and the steel pipe wall thickness grade is Sch160.
The welded flange with a neck should be HG20617 rather than HG20616. Additionally, in the context of flange series, it should be referred to as nominal diameter instead of nominal bore! ! :lol
The butt-welded flange with a neck is HG20617; I made a mistake, sorry. Additionally, in the flange series, it is referred to as the nominal diameter; you can refer to the HG standards for more details. Thank you for the correction!
It seems to be an RF welded flange of type HG20616, a raised-neck welded flange with a nominal pressure of 5.0 MPa. The WN designation indicates that it is a welded flange, 20 represents the nominal diameter, 5.0 denotes the pressure rating, RF refers to the sealing surface type as raised, and SCH160 is the material grade
What was said upstairs is not quite correct; the standard for high-neck butt-welded flanges is HG20615, which corresponds to the American standard ASME B16.5
What was said upstairs is incorrect. HG20615 belongs to the American system; it includes HG20616 (butt weld with neck) and HG20617-97 (butt weld with neck)
I’ve learned it, thank you! ! ! ! ! ! ! ! !
WN is the flange type code, indicating a welded flange with a neck. 20 denotes a nominal outer diameter of 20 mm. 5.0 represents a nominal pressure of 5.0 MPa. RF is the code for the flange sealing surface type, indicating a raised-face flange. Sch160 is the code for the pipe wall thickness, namely 5.6 mm. In addition, the flange markings should also include the material code, manufacturer’s mark, and flange standard number.