Can flanges of 300 pounds and 5.0 MPa be used together?
Thread Content
Similarly, can flanges converted from American standards to Chinese standards be used interchangeably? Are the bolt hole positions and sizes the same?
The center distance between the bolt holes seems to be different
Doesn’t HG/T20615 Class300 correspond to PN50? Why does everyone say it doesn’t work?:o
This post was last edited by dpclove21 on 2016-9-6 08:33. 300 pounds per square inch in US standards corresponds to 5.0 MPa in European standards; the pressure rating is therefore acceptable. Whether it can be used depends on whether the outer diameter of your pipe is that of a larger diameter pipe, namely what is commonly referred to as an imperial pipe.
There are two domestic flange standards: HG/T20615 corresponds to the American standard, while HG/T20592 corresponds to the European standard. The outer diameters of the two types of pipes are different; if the outer diameter follows Series A specified in HG20592, they can be paired with pipes that meet American standards. I wonder if it was understood?
It’s possible, but the diameter standards of the pipes to be paired must be the same; otherwise, the welds will not be even. It seems that the standards are SH3405 and SH3408
According to European standards, there should be no value of 5.0 MPa; therefore, both the 300 lb value and 5.0 MPa you mentioned belong to the American standard series, they just have different names. Need to verify it myself again
I just checked the standards as well; indeed, the European standards do not specify 5.0 MPa, so the question posed by the original poster is problematic
Sure, 300 pounds is 50 kilograms