DIN 2413/I and DIN 2413/III Steel pipe
All working pressures are based on DIN 241311 and DIN 24131111 for straight tubes and pipes.
The yield point and tensile stress value determine the maximum allowable working pressure and the required wall thickness.
DNV Rules
All working pressures are based on Det Norske Veritas rules for classification of ships, new building part 4, Chapter 1, Section 6 and mobile offshore units drilling plant (drill) Part 6, chapter 5, Section 6 for bent tubes and pipes.