ANSI Flange Ratings ASME B16.5

I go through a quick explanation of ANSI Flanges and the Group 1.1 materials for flanges

Disclaimer:
Everything here is for informational purposes only and not for the purposes of providing design or other related advice. Design, operation, maintenance, etc. should be performed for the particular situation in accordance with applicable codes and regulations by approved, reputable, and qualified individuals or organizations.

[kesavraj]

Good video...Can you elaborate how the particular pressure in psi is calculated for the particular pressure class...what does 150, 300, ....means

[Chicarito-sergio]

What do the 1”, 2” etc mean? Is that the thickness of the flange? Also, what does 150, 300 etc represent? Are they arbitrary?

[yasirzaya]

i still have a doubt sir, if the maximum pressure rating for a particular class flange, say A105 @ 100F is 285 Psi, then it means it can handle 1.5 x 285 Psi= 427.5 Psi which is equivalent to 29.4 Bar. So if my unforeseen pressure of a piping system will be like 25 Bar i can still go with ASME 150# flange.
can you please also where in which code i can find the relevance of flange MAWP= 1.5 x MWP

[shaileshsrivastva]

How to do valve leak test she'll test backsheet test high pressure and low pressure sir make a video

[FahimKhan-zmyc]

Will u please clear my doubt sir, in order to design the spectacle blind or spacer for above 24" how it's thickness will be calculated