CLASS 300 Conversion Problems
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I would like to ask the experts: CLASS 300 can be replaced with the national standard PN 50, but why do some documents show what is shown in the image below? Thank you for the reply
PN25 « CLASS 300 « PN50, range
Class300 should be able to replace PN25 and PN40; PN50 is actually just another way of writing Class300.
The nominal pressure can be found in tables using the pound rating; the nominal pressure for 300CL is approximately 5 MPa, while that for 150CL is around 1.9 MPa. Therefore, to use American standards equivalents for PN25, PN40, and PN50, 300CL is the only option – that’s what this designation means