AD 2000 CODE CYLINDER FORMULA under inner pressure?

[101Mpa]

I know that it is the latest version 10.2000 edition for AD 2000-Merkblatt B 1.
BUT， I have a question that the times 20 or 40 in these formulas is right or not.
Is there any amendment or errata for this?

 

[saplanti]

No, they are correct to the code. Think about Ro = Do/2. Additionally, I suggest you to check the units that required for the formulas, Factor of 10 is for the unit correction only. I trust this is sufficient.